add shadow, jflex, jacc plugins, update to gradle 7.4

LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

build.gradle

@@ -1,6 +1,6 @@
 
 wrapper {
-    gradleVersion = "${project.property('gradle.wrapper.version')}"
+    gradleVersion = libs.versions.gradle.get()
     distributionType = Wrapper.DistributionType.ALL
 }
 

gradle-plugin-asciidoctor/NOTICE.txt

@@ -0,0 +1,10 @@
+
+This work is based on an old (before June 2018) 1.5.6 version of
+
+https://github.com/asciidoctor/asciidoctor-gradle-plugin
+
+You can find remnants in the official code under org.asciidoctor.gradle.compat, when it was created with
+
+https://github.com/ysb33r/asciidoctor-gradle-plugin/commit/1ad29b2eba915f7bce3cb004e3e9582578c8ac72
+
+License: Apache 2.0

gradle-plugin-asciidoctor/build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'java-gradle-plugin'
-    id 'com.gradle.plugin-publish' version '0.18.0'
+    alias(libs.plugins.publish)
 }
 
 apply plugin: 'java-gradle-plugin'
@@ -10,10 +10,10 @@ apply from: rootProject.file('gradle/compile/groovy.gradle')
 
 dependencies {
     api gradleApi()
-    implementation "org.asciidoctor:asciidoctorj:${project.property('asciidoctorj.version')}"
-    implementation "org.jruby:jruby:${project.property('jruby.version')}"
-    testImplementation "org.spockframework:spock-core:${project.property('spock.version')}"
-    testImplementation "org.jsoup:jsoup:${project.property('jsoup.version')}"
+    implementation libs.asciidoctorj
+    implementation libs.jruby
+    testImplementation  libs.spock.core
+    testImplementation libs.jsoup
 }
 
 gradlePlugin {

gradle-plugin-asciidoctor/gradle.properties

@@ -1 +1 @@
-version = 2.5.2.0
+version = 2.5.2.1

gradle-plugin-asciidoctor/src/main/groovy/org/xbib/gradle/plugin/asciidoctor/AsciidoctorExtension.groovy

@@ -4,7 +4,7 @@ import org.gradle.api.Project
 
 class AsciidoctorExtension {
 
-    String version = '2.5.3'
+    String version = '2.5.2'
 
     boolean addDefaultRepositories = true
 

gradle-plugin-docker/build.gradle

@@ -1,28 +1,18 @@
 plugins {
     id 'java-gradle-plugin'
-    id 'groovy'
-    id 'com.gradle.plugin-publish' version '0.18.0'
+    alias(libs.plugins.publish)
 }
 
-apply plugin: 'groovy'
 apply plugin: 'java-gradle-plugin'
 apply plugin: 'com.gradle.plugin-publish'
 
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+
 dependencies {
     api gradleApi()
     testImplementation gradleTestKit()
 }
 
-compileGroovy {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
-}
-
-compileTestGroovy {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
-}
-
 gradlePlugin {
     plugins {
         dockerPlugin {

gradle-plugin-git/LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

gradle-plugin-git/build.gradle

@@ -1,29 +1,19 @@
 plugins {
     id 'java-gradle-plugin'
-    id 'groovy'
-    id 'com.gradle.plugin-publish' version '0.18.0'
+    alias(libs.plugins.publish)
 }
 
-apply plugin: 'groovy'
 apply plugin: 'java-gradle-plugin'
 apply plugin: 'com.gradle.plugin-publish'
 
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+
 dependencies {
     api gradleApi()
-    api "org.xbib.groovy:groovy-git:${project.property('groovy-git.version')}"
+    api libs.groovy.git
     testImplementation gradleTestKit()
-    testImplementation "org.spockframework:spock-core:${project.property('spock.version')}"
-    testImplementation "junit:junit:${project.property('junit4.version')}"
-}
-
-compileGroovy {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
-}
-
-compileTestGroovy {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    testImplementation  libs.spock.core
+    testImplementation libs.junit4
 }
 
 gradlePlugin {

gradle-plugin-jacc/LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

gradle-plugin-jacc/README.md

@@ -0,0 +1,52 @@
+# gradle-plugin-jacc
+
+A Gradle plugin for [Jacc](http://web.cecs.pdx.edu/~mpj/jacc/)
+
+## Usage
+
+        plugins {
+           id 'org.xbib.gradle.plugin.jacc'
+        }
+        
+        apply plugin: 'org.xbib.gradle.plugin.jacc'
+
+Gradle will look for your jacc files in the source sets you specified.
+By default, it looks with the pattern `**/*.jacc` under `src/main/jacc`
+and `src/test/jacc`.
+
+You can set up the source sets like this:
+
+    sourceSets {
+      main {
+         jacc {
+           srcDir "src/main/jacc"
+         }
+         java {
+           srcDir "build/my-generated-sources/jacc"
+         }
+      }
+    }
+    
+The lastJava `srcDir` definition will be used as the base for the Jacc target path.
+If not given, the Jacc target path for generated Java source follows the pattern:
+
+`${project.buildDir}/generated/sources/jacc`
+
+The Jacc target path will be added automaticlly to the java compile task source directory 
+of the source set.
+
+# License
+
+Copyright (C) 2015-2020 Jörg Prante
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

gradle-plugin-jacc/build.gradle

@@ -0,0 +1,41 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    implementation libs.jacc
+    testImplementation gradleTestKit()
+}
+
+gradlePlugin {
+    plugins {
+        jaccPlugin {
+            id = 'org.xbib.gradle.plugin.jacc'
+            implementationClass = 'org.xbib.gradle.plugin.jacc.JaccPlugin'
+        }
+    }
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    pluginBundle {
+        website = scmUrl
+        vcsUrl = scmUrl
+        plugins {
+            jaccPlugin {
+                id = 'org.xbib.gradle.plugin.jacc'
+                version = project.version
+                description = 'Gradle Jacc plugin'
+                displayName = 'Gradle Jacc plugin'
+                tags = ['jacc']
+            }
+        }
+    }
+}

gradle-plugin-jacc/gradle.properties

@@ -0,0 +1 @@
+version = 1.4.0

gradle-plugin-jacc/src/main/groovy/org/xbib/gradle/plugin/jacc/JaccPlugin.groovy

@@ -0,0 +1,80 @@
+package org.xbib.gradle.plugin.jacc
+
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.file.SourceDirectorySet
+import org.gradle.api.logging.Logger
+import org.gradle.api.logging.Logging
+import org.gradle.api.tasks.SourceSet
+import org.gradle.api.tasks.TaskProvider
+
+class JaccPlugin implements Plugin<Project> {
+
+    private static final Logger logger = Logging.getLogger(JaccPlugin)
+
+    @Override
+    void apply(Project project) {
+        project.with {
+            apply plugin: 'java-library'
+            addSourceSetExtensions(project)
+        }
+        project.afterEvaluate {
+            addTasks(project)
+        }
+    }
+
+
+    private static void addSourceSetExtensions(Project project) {
+        project.sourceSets.all { SourceSet sourceSet ->
+            createSourceSetExtension(project, sourceSet)
+            createConfiguration(project, sourceSet)
+        }
+    }
+
+    private static void createSourceSetExtension(Project project, SourceSet sourceSet) {
+        String name = sourceSet.name
+        SourceDirectorySet sourceDirectorySet = project.objects.sourceDirectorySet(name, "${name} Jacc source")
+        sourceSet.extensions.add('jacc', sourceDirectorySet)
+        sourceDirectorySet.srcDir("src/${name}/jacc")
+        sourceDirectorySet.include("**/*.jacc")
+    }
+
+
+    private static void createConfiguration(Project project, SourceSet sourceSet) {
+        String configName = sourceSet.name + 'Jacc'
+        if (project.configurations.findByName(configName) == null) {
+            logger.info "create configuration ${configName}"
+            project.configurations.create(configName) {
+                visible = false
+                transitive = true
+                extendsFrom = []
+            }
+        }
+    }
+
+    private static void addTasks(Project project) {
+        project.sourceSets.all { SourceSet sourceSet ->
+            addTaskForSourceSet(project, sourceSet)
+        }
+    }
+
+    private static void addTaskForSourceSet(Project project, SourceSet sourceSet) {
+        String taskName = sourceSet.getTaskName('generate', 'jacc')
+        SourceDirectorySet sourceDirectorySet = sourceSet.extensions.getByName('jacc') as SourceDirectorySet
+        File targetFile = sourceSet.java && sourceSet.java.srcDirs ? sourceSet.java.srcDirs.last() :
+                project.file("${project.buildDir}/generated/sources/${sourceSet.name}")
+        if (sourceDirectorySet.asList()) {
+            TaskProvider<JaccTask> taskProvider = project.tasks.register(taskName, JaccTask) {
+                group = 'jacc'
+                description = 'Generates code from Jacc files in ' + sourceSet.name
+                source = sourceDirectorySet.asList()
+                target = targetFile
+            }
+            logger.info "created ${taskName} for sources ${sourceDirectorySet.asList()} and target ${targetFile}"
+            project.tasks.findByName(sourceSet.compileJavaTaskName).dependsOn taskProvider
+            if (sourceSet.java && sourceSet.java.srcDirs) {
+                sourceSet.java.srcDirs += targetFile
+            }
+        }
+    }
+}

gradle-plugin-jacc/src/main/groovy/org/xbib/gradle/plugin/jacc/JaccTask.groovy

@@ -0,0 +1,33 @@
+package org.xbib.gradle.plugin.jacc
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.tasks.InputFiles
+import org.gradle.api.tasks.OutputDirectory
+import org.gradle.api.tasks.TaskAction
+import org.xbib.jacc.Jacc
+
+class JaccTask extends DefaultTask {
+
+    @InputFiles
+    Iterable<File> source
+
+    @OutputDirectory
+    File target
+
+    @TaskAction
+    void generateAndTransformJacc() throws Exception {
+        source.each { file ->
+            String pkg = getPackageName(file)
+            File fullTarget = new File(target, pkg.replace('.','/'))
+            project.mkdir(fullTarget)
+            Jacc.main([file.absolutePath, '-d', fullTarget] as String[])
+        }
+    }
+
+    static String getPackageName(File file) {
+        String string = file.readLines().find { line ->
+            line.startsWith('package')
+        }
+        return string == null ? '' : string.substring(8, string.length() - 1)
+    }
+}

gradle-plugin-jacc/src/test/groovy/org/xbib/gradle/plugin/jacc/JaccPluginTest.groovy

@@ -0,0 +1,65 @@
+package org.xbib.gradle.plugin.jacc
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
+
+import static org.junit.jupiter.api.Assertions.*
+
+class JaccPluginTest {
+
+    private File projectDir
+
+    private File settingsFile
+
+    private File buildFile
+
+    @BeforeEach
+    void setup(@TempDir File testProjectDir) throws IOException {
+        this.projectDir = testProjectDir
+        this.settingsFile = new File(testProjectDir, "settings.gradle")
+        this.buildFile = new File(testProjectDir, "build.gradle")
+    }
+
+    @Test
+    void testJacc() {
+        String settingsFileContent = '''
+rootProject.name = 'jacc-test'
+'''
+        settingsFile.write(settingsFileContent)
+        String buildFileContent = '''
+plugins {
+    id 'org.xbib.gradle.plugin.jacc'
+}
+
+sourceSets {
+  test {
+     jacc {
+       srcDir "${System.getProperty('user.dir')}/src/test/jacc"
+     }
+     java {
+       srcDir "${System.getProperty('user.dir')}/build/my-generated-sources/jacc"
+     }
+  }
+}
+
+'''
+        buildFile.write(buildFileContent)
+        BuildResult result = GradleRunner.create()
+                .withProjectDir(projectDir)
+                .withArguments(":build", "--info")
+                .withPluginClasspath()
+                .forwardOutput()
+                .build()
+        assertEquals(TaskOutcome.SUCCESS, result.task(":build").getOutcome())
+
+        File file = new File("${System.getProperty('user.dir')}/build/my-generated-sources/jacc")
+        if (file.exists()) {
+            List<File> list = Arrays.asList(file.listFiles())
+            assertEquals(2, list.size())
+        }
+    }
+}

gradle-plugin-jacc/src/test/jacc/simpleCalc.jacc

@@ -0,0 +1,104 @@
+// To compile and run this program using jacc and Sun's JDK:
+//
+//    jacc simpleCalc.jacc
+//    javac Calc.java CalcTokens.java
+//    java  Calc
+//     ... enter arithmetic expressions ... hit EOF to terminate
+//
+
+%class     Calc
+%interface CalcTokens
+%semantic  int : yylval
+%get       token
+%next      yylex()
+
+%token '+' '-' '*' '/' '(' ')' ';' INTEGER
+%left  '+' '-'
+%left  '*' '/'
+
+%%
+
+prog : prog ';' expr    { System.out.println($3); }
+     | expr             { System.out.println($1); }
+     ;
+expr : expr '+' expr	{ $$ = $1 + $3; }
+     | expr '-' expr	{ $$ = $1 - $3; }
+     | expr '*' expr	{ $$ = $1 * $3; }
+     | expr '/' expr	{ $$ = $1 / $3; }
+     | '(' expr ')'     { $$ = $2; }
+     | INTEGER          { $$ = $1; }
+     ;
+
+%%
+
+  private void yyerror(String msg) {
+    System.out.println("ERROR: " + msg);
+    System.exit(1);
+  }
+
+  private int c;
+
+  /** Read a single input character from standard input.
+   */
+  private void nextChar() {
+    if (c>=0) {
+      try {
+        c = System.in.read();
+      } catch (Exception e) {
+        c = (-1);
+      }
+    }
+  }
+
+  int token;
+  int yylval;
+
+  /** Read the next token and return the
+   *  corresponding integer code.
+   */
+  int yylex() {
+    for (;;) {
+      // Skip whitespace
+      while (c==' ' || c=='\n' || c=='\t' || c=='\r') {
+        nextChar();
+      }
+      if (c<0) {
+        return (token=ENDINPUT);
+      }
+      switch (c) {
+        case '+' : nextChar();
+                   return token='+';
+        case '-' : nextChar();
+                   return token='-';
+        case '*' : nextChar();
+                   return token='*';
+        case '/' : nextChar();
+                   return token='/';
+        case '(' : nextChar();
+                   return token='(';
+        case ')' : nextChar();
+                   return token=')';
+        case ';' : nextChar();
+                   return token=';';
+        default  : if (Character.isDigit((char)c)) {
+                     int n = 0;
+                       do {
+                         n = 10*n + (c - '0');
+                         nextChar();
+                       } while (Character.isDigit((char)c));
+                       yylval = n;
+                       return token=INTEGER;
+                     } else {
+                       yyerror("Illegal character "+c);
+                       nextChar();
+                     }
+      }
+    }
+  }
+
+  public static void main(String[] args) {
+    Calc calc = new Calc();
+    calc.nextChar(); // prime the character input stream
+    calc.yylex();    // prime the token input stream
+    calc.parse();    // parse the input
+  }

gradle-plugin-jflex/LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

gradle-plugin-jflex/README.md

@@ -0,0 +1,79 @@
+# gradle-plugin-jflex
+
+A Gradle plugin for [JFlex](http://jflex.de)
+
+## Usage
+
+    plugins {
+       id "org.xbib.gradle.plugin.jflex" version "1.4.0"
+    }
+
+Gradle will look for your JFlex files in the source sets you specified.
+By default, it looks with the pattern `**/*.jflex` under `src/main/jflex`
+and `src/test/jflex`.
+
+You can set up the source sets like this:
+
+    sourceSets {
+      main {
+         jflex {
+           srcDir "src/main/jflex"
+         }
+         java {
+           srcDir "$buildDir/my-generated-sources/jflex"
+         }
+      }
+    }
+    
+The lastJava `srcDir` definition will be used as the base for the JFLex target path.
+If not given, the JFlex target path for generated Java source follows the pattern:
+
+`${project.buildDir}/generated/sources/jflex`
+
+The JFlex target path will be added automatically to the java compile task source directory 
+of the source set.
+
+## Parameter support
+
+The following parameters can be set in a global `jflex` extension 
+in the gradle script. See also https://jflex.de/manual.html
+
+| Name    | Description |
+| ------- | ---------- |
+| encoding | the file encoding |
+| rootDirectory | the root directory used by JFlex (modification discouraged since the directories are derived from gradle source set)
+| skel | uses external skeleton <file> in UTF-8 encoding. This is mainly for JFlex maintenance and special low level customisations. Use only when you know what you are doing! JFlex comes with a skeleton file in the src directory that reflects exactly the internal, pre-compiled skeleton and can be used with the skel option. |
+| verbose | display generation progress messages (disabled by default) |
+| jlex | tries even harder to comply to JLex interpretation of specs |
+| no_minimize | skip the DFA minimisation step during scanner generation |
+| no_backup | don't write backup files if this is true |
+| unused_warning | warn about unused macros (by default false) |
+| progress |  progress dots will be printed (by default false) |
+| dot | If true, jflex will write graphviz .dot files for generated automata (by default, false) |
+| time | If true, jflex will print time statistics about the generation process (by default false) |
+| dump | If true, you will be flooded with information, e.g. dfa tables (by default, false) |
+| legacy_dot | dot (.) meta character matches [^\n] instead of [^\n\r\u000B\u000C\u0085\u2028\u2029] |
+| statistics | print output statistics (by default, false) |
+
+## Credits
+
+gradle-plugin-jflex is a plugin based on
+[gradle-jflex-plugin](https://github.com/thomaslee/gradle-jflex-plugin)
+which was written by [Tom Lee](http://tomlee.co).
+
+# License
+
+Copyright (C) 2015-2020 Jörg Prante
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+

gradle-plugin-jflex/build.gradle

@@ -0,0 +1,41 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    implementation libs.jflex
+    testImplementation gradleTestKit()
+}
+
+gradlePlugin {
+    plugins {
+        jflexPlugin {
+            id = 'org.xbib.gradle.plugin.jflex'
+            implementationClass = 'org.xbib.gradle.plugin.jflex.JFlexPlugin'
+        }
+    }
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    pluginBundle {
+        website = scmUrl
+        vcsUrl = scmUrl
+        plugins {
+            jflexPlugin {
+                id = 'org.xbib.gradle.plugin.jflex'
+                version = project.version
+                description = 'Gradle JFlex plugin'
+                displayName = 'Gradle JFlex plugin'
+                tags = ['jflex']
+            }
+        }
+    }
+}

gradle-plugin-jflex/gradle.properties

@@ -0,0 +1 @@
+version = 1.6.0

gradle-plugin-jflex/src/main/groovy/org/xbib/gradle/plugin/jflex/JFlexExtension.groovy

@@ -0,0 +1,67 @@
+package org.xbib.gradle.plugin.jflex
+
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.Optional
+
+class JFlexExtension {
+
+    @Input
+    @Optional
+    String encoding
+
+    @Input
+    @Optional
+    File rootDirectory
+
+    @Input
+    @Optional
+    File skel
+
+    @Input
+    @Optional
+    Boolean verbose = false
+
+    @Input
+    @Optional
+    Boolean jlex = false
+
+    @Input
+    @Optional
+    Boolean no_minimize = false
+
+    @Input
+    @Optional
+    Boolean no_backup = false
+
+    @Input
+    @Optional
+    Boolean unused_warning = false
+
+    @Input
+    @Optional
+    Boolean progress = false
+
+    @Input
+    @Optional
+    Boolean time = false
+
+    @Input
+    @Optional
+    Boolean dot = false
+
+    @Input
+    @Optional
+    Boolean dump = false
+
+    @Input
+    @Optional
+    Boolean legacy_dot = false
+
+    @Input
+    @Optional
+    Boolean statistics = false
+
+    @Input
+    @Optional
+    Boolean writeIntoJavaSrc = false
+}

gradle-plugin-jflex/src/main/groovy/org/xbib/gradle/plugin/jflex/JFlexPlugin.groovy

@@ -0,0 +1,90 @@
+package org.xbib.gradle.plugin.jflex
+
+import org.gradle.api.file.SourceDirectorySet
+import org.gradle.api.logging.Logger
+import org.gradle.api.logging.Logging
+import org.gradle.api.tasks.SourceSet
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.tasks.TaskProvider
+
+class JFlexPlugin implements Plugin<Project> {
+
+    private static final Logger logger = Logging.getLogger(JFlexPlugin)
+
+    @Override
+    void apply(Project project) {
+        logger.info "JFlex plugin says hello"
+        project.with {
+            apply plugin: 'java-library'
+            createJflexExtension(project)
+            addSourceSetExtensions(project)
+        }
+        project.afterEvaluate {
+            addJFlexTasks(project)
+        }
+    }
+
+    private static void addSourceSetExtensions(Project project) {
+        project.sourceSets.all { SourceSet sourceSet ->
+            createSourceSetExtension(project, sourceSet)
+            createConfiguration(project, sourceSet)
+        }
+    }
+
+    private static void createSourceSetExtension(Project project, SourceSet sourceSet) {
+        String name = sourceSet.name
+        SourceDirectorySet sourceDirectorySet = project.objects.sourceDirectorySet(name, "${name} JFlex source")
+        sourceSet.extensions.add('jflex', sourceDirectorySet)
+        sourceDirectorySet.srcDir("src/${name}/jflex")
+        sourceDirectorySet.include("**/*.jflex")
+    }
+
+    private static void createConfiguration(Project project, SourceSet sourceSet) {
+        String configName = sourceSet.name + capitalize('jflex' as CharSequence)
+        if (project.configurations.findByName(configName) == null) {
+            logger.info "create configuration ${configName}"
+            project.configurations.create(configName) {
+                visible = false
+                transitive = true
+                extendsFrom = []
+            }
+        }
+    }
+
+    private static void createJflexExtension(Project project) {
+        project.extensions.create ('jflex', JFlexExtension)
+    }
+
+    private static void addJFlexTasks(Project project) {
+        project.sourceSets.all { SourceSet sourceSet ->
+            addJFlexTaskForSourceSet(project, sourceSet)
+        }
+    }
+
+    private static void addJFlexTaskForSourceSet(Project project, SourceSet sourceSet) {
+        String taskName = sourceSet.getTaskName('generate', 'jflex')
+        SourceDirectorySet sourceDirectorySet = sourceSet.extensions.getByName('jflex') as SourceDirectorySet
+        File targetFile = project.file("${project.buildDir}/generated/sources/${sourceSet.name}")
+        if (sourceDirectorySet.asList()) {
+            TaskProvider<JFlexTask> taskProvider = project.tasks.register(taskName, JFlexTask) {
+                group = 'jflex'
+                description = 'Generates code from JFlex files in ' + sourceSet.name
+                source = sourceDirectorySet.asList()
+                target = targetFile
+                theSourceSet = sourceSet
+            }
+            logger.info "created ${taskName} for sources ${sourceDirectorySet.asList()} and target ${targetFile}"
+            project.tasks.named(sourceSet.compileJavaTaskName).configure({
+                dependsOn taskProvider
+            })
+            if (sourceSet.java && sourceSet.java.srcDirs) {
+                sourceSet.java.srcDirs += targetFile
+            }
+        }
+    }
+
+    private static String capitalize(CharSequence charSequence) {
+        return charSequence.length() == 0 ? "" : "" + Character.toUpperCase(charSequence.charAt(0)) + charSequence.subSequence(1, charSequence.length())
+    }
+}

gradle-plugin-jflex/src/main/groovy/org/xbib/gradle/plugin/jflex/JFlexTask.groovy

@@ -0,0 +1,91 @@
+package org.xbib.gradle.plugin.jflex
+
+import jflex.exceptions.GeneratorException
+import jflex.generator.LexGenerator
+import jflex.logging.Out
+import jflex.option.Options
+import jflex.skeleton.Skeleton
+import org.gradle.api.DefaultTask
+import org.gradle.api.logging.Logger
+import org.gradle.api.logging.Logging
+import org.gradle.api.tasks.CacheableTask
+import org.gradle.api.tasks.InputFiles
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.OutputDirectory
+import org.gradle.api.tasks.PathSensitive
+import org.gradle.api.tasks.PathSensitivity
+import org.gradle.api.tasks.SourceSet
+import org.gradle.api.tasks.StopActionException
+import org.gradle.api.tasks.TaskAction
+
+import java.nio.charset.Charset
+
+@CacheableTask
+class JFlexTask extends DefaultTask {
+
+    private final Logger logger = Logging.getLogger(JFlexTask)
+
+    @InputFiles
+    @PathSensitive(PathSensitivity.RELATIVE)
+    Iterable<File> source
+
+    @OutputDirectory
+    File target
+
+    @Internal
+    SourceSet theSourceSet
+
+    @TaskAction
+    void generateAndTransformJflex() throws Exception {
+        JFlexExtension ext = project.extensions.findByType(JFlexExtension)
+        Options.setRootDirectory(ext.rootDirectory ? ext.rootDirectory : new File(""))
+        Skeleton.readDefault()
+        if (ext.skel) {
+            Skeleton.readSkelFile(ext.skel)
+        }
+        Options.encoding = ext.encoding ? Charset.forName(ext.encoding) : Charset.defaultCharset()
+        Options.verbose = ext.verbose
+        Options.progress = ext.progress
+        Options.unused_warning = ext.unused_warning
+        Options.jlex = ext.jlex
+        Options.no_minimize = ext.no_minimize
+        Options.no_backup = ext.no_backup
+        Options.time = ext.time
+        Options.dot = ext.dot
+        Options.dump = ext.dump
+        Options.legacy_dot = ext.legacy_dot
+        // hack for writing directly into java source. Not recommended.
+        if (ext.writeIntoJavaSrc) {
+            if (theSourceSet.java && theSourceSet.java.srcDirs) {
+                logger.info "java sources: ${theSourceSet.java.srcDirs}"
+                target = theSourceSet.java.srcDirs.first()
+                logger.info "switching to first java source directory ${target}"
+            } else {
+                logger.warn "writing into java source not possible, is empty"
+            }
+        }
+        source.each { file ->
+            String pkg = getPackageName(file)
+            File fullTarget = new File(target, pkg.replace('.','/'))
+            project.mkdir(fullTarget)
+            Options.directory = fullTarget
+            logger.info "jflex task: source=${file} pkg=${pkg} dir=${target}"
+            try {
+                new LexGenerator(file).generate()
+            } catch (GeneratorException e) {
+                Logging.getLogger(JFlexTask).error("JFlex error: ${e.message}", e)
+                throw new StopActionException('an error occurred during JFlex code generation')
+            }
+        }
+        if (ext.statistics) {
+            Out.statistics()
+        }
+    }
+
+    static String getPackageName(File file) {
+        String string = file.readLines().find { line ->
+            line.startsWith('package')
+        }
+        return string == null ? '' : string.substring(8, string.length() - 1)
+    }
+}

gradle-plugin-jflex/src/test/groovy/org/xbib/gradle/plugin/test/JFlexPluginTest.groovy

@@ -0,0 +1,194 @@
+package org.xbib.gradle.plugin.test
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
+
+import java.nio.file.Files
+
+import static org.junit.jupiter.api.Assertions.*
+
+class JFlexPluginTest {
+
+    private File projectDir
+
+    private File settingsFile
+
+    private File buildFile
+
+    @BeforeEach
+    void setup(@TempDir File testProjectDir) throws IOException {
+        this.projectDir = testProjectDir
+        this.settingsFile = new File(testProjectDir, "settings.gradle")
+        this.buildFile = new File(testProjectDir, "build.gradle")
+    }
+
+    @Test
+    void testJFlex() {
+        String settingsFileContent = '''
+rootProject.name = 'jflex-test'
+'''
+        settingsFile.write(settingsFileContent)
+        String buildFileContent = '''
+plugins {
+    id 'org.xbib.gradle.plugin.jflex'
+}
+
+sourceSets {
+  test {
+     jflex {
+       // point to our test directory where the jflex file lives
+       srcDir "${System.getProperty('user.dir')}/src/test/jflex"
+     }
+  }
+}
+
+jflex {
+   verbose = true
+   dump = false
+   progress = false
+}
+
+'''
+        buildFile.write(buildFileContent)
+        BuildResult result = GradleRunner.create()
+                .withProjectDir(projectDir)
+                .withArguments(":build", "--info")
+                .withPluginClasspath()
+                .forwardOutput()
+                .build()
+        assertEquals(TaskOutcome.SUCCESS, result.task(":build").getOutcome())
+        // default output dir
+        File target = new File(projectDir, "build/generated/sources/test")
+        boolean found = false
+        if (target.exists()) {
+            // check for generated output
+            assertEquals(1, target.listFiles().length)
+            target.eachFileRecurse {
+                if (it.isFile()) {
+                    println "found: ${it}"
+                    found = true
+                }
+            }
+        } else {
+            fail("directory not found: ${target}")
+        }
+        if (!found) {
+            fail("jflex output not found")
+        }
+    }
+
+
+    @Test
+    void testJFlexWriteIntoJavaSrc() {
+        Files.createDirectories(projectDir.toPath().resolve('src/main/java'))
+        Files.createDirectories(projectDir.toPath().resolve('src/test/java'))
+        String settingsFileContent = '''
+rootProject.name = 'jflex-test'
+'''
+        settingsFile.write(settingsFileContent)
+        String buildFileContent = '''
+plugins {
+    id 'org.xbib.gradle.plugin.jflex'
+}
+
+sourceSets {
+  main {
+     java {
+       srcDir "src/main/java"
+     }
+     jflex {
+       // point to our test directory where the jflex file lives
+       srcDir "${System.getProperty('user.dir')}/src/test/jflex"
+     }
+  }
+  test {
+     java {
+       srcDir "src/test/java"
+     }
+  }
+}
+
+jflex {
+   verbose = true
+   dump = false
+   progress = false
+   // enable legacy behavior of writing directly into Java source directory. Not recommended.
+   writeIntoJavaSrc = true
+}
+
+'''
+        buildFile.write(buildFileContent)
+        BuildResult result = GradleRunner.create()
+                .withProjectDir(projectDir)
+                .withArguments(":build", "--info")
+                .withPluginClasspath()
+                .forwardOutput()
+                .build()
+        assertEquals(TaskOutcome.SUCCESS, result.task(":build").getOutcome())
+        // search the Java source directory
+        File target = new File(projectDir, "src/main/java")
+        boolean found = false
+        if (target.exists()) {
+            // check for generated file
+            assertEquals(1, target.listFiles().length)
+            target.eachFileRecurse {
+                if (it.isFile()) {
+                    println "found: ${it}"
+                    found = true
+                }
+            }
+        } else {
+            fail("directory not found: ${target}")
+        }
+        if (!found) {
+            fail("jflex output not found")
+        }
+    }
+
+    @Test
+    void testTaskIsNotStarted() {
+        String buildFileContent = '''
+plugins {
+    id 'org.xbib.gradle.plugin.jflex'
+}
+
+sourceSets {
+  test {
+     jflex {
+       srcDir "${System.getProperty('user.dir')}/src/test/jflex"
+     }
+     java {
+       srcDir "${System.getProperty('user.dir')}/build/my-generated-sources/jflex"
+     }
+  }
+}
+
+jflex {
+   verbose = false
+   dump = false
+   progress = false
+}
+
+def configuredTasks = []
+tasks.configureEach {
+    configuredTasks << it
+}
+
+gradle.buildFinished {
+    def configuredTaskPaths = configuredTasks*.path
+    assert configuredTaskPaths == [':help',':clean']
+}
+'''
+        buildFile.write(buildFileContent)
+        GradleRunner.create()
+                .withProjectDir(projectDir)
+                .withArguments(":help")
+                .withPluginClasspath()
+                .forwardOutput()
+                .build()
+    }
+}

gradle-plugin-jflex/src/test/jflex/org/xbib/gradle/plugin/test/Test.jflex

@@ -0,0 +1,43 @@
+package org.xbib.gradle.plugin.test;
+import java.io.IOException;
+
+%%
+
+%class Test
+%int
+%unicode
+%line
+%column
+
+%{
+  int token;
+  double yylval;
+
+  int nextToken() {
+    try {
+      return token = yylex();
+    } catch (IOException e) {
+      return token = -1;
+    }
+  }
+
+  int getToken() {
+    return token;
+  }
+
+  double getSemantic() {
+    return yylval;
+  }
+%}
+
+ws     = [ \t\f]
+digit  = [0-9]
+number = {digit}+(\.{digit}+)?(E[+\-]?{digit}+)?
+
+%%
+  \r|\n|\r\n                     { return 0; }
+  {ws}+                          { }
+  {number}                       { yylval = Double.parseDouble(yytext()); return 1; }
+  [+\-*/()=]                     { return (int)(yytext().charAt(0)); }
+  "*+"                           { return 2; }
+  .                              { throw new Error(yytext()); }

gradle-plugin-rpm/NOTICE.txt

@@ -0,0 +1,8 @@
+
+Very loosely based on a 2018 version of nebula.rpm
+
+https://github.com/nebula-plugins/gradle-ospackage-plugin
+
+but completely revised, using the xbib rpm library, not redline rpm.
+
+Lincense: Apache 2.0

gradle-plugin-rpm/build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'java-gradle-plugin'
-    id 'com.gradle.plugin-publish' version '0.18.0'
+    alias(libs.plugins.publish)
 }
 
 apply plugin: 'java-gradle-plugin'
@@ -10,20 +10,10 @@ apply from: rootProject.file('gradle/compile/groovy.gradle')
 
 dependencies {
     api gradleApi()
-    api "org.xbib:rpm-core:${project.property('rpm.version')}"
+    api libs.rpm
     testImplementation gradleTestKit()
 }
 
-compileGroovy {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
-}
-
-compileTestGroovy {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
-}
-
 gradlePlugin {
     plugins {
         rpmPlugin {

gradle-plugin-rpm/src/main/groovy/org/xbib/gradle/plugin/RpmPlugin.groovy

@@ -1,19 +1,13 @@
 package org.xbib.gradle.plugin
 
-import org.gradle.api.GradleException
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.plugins.BasePlugin
-import org.gradle.util.GradleVersion
 
 class RpmPlugin implements Plugin<Project> {
 
     @Override
     void apply(Project project) {
-        String version = '6.4'
-        if (GradleVersion.current() < GradleVersion.version(version)) {
-            throw new GradleException("need Gradle ${version} or higher")
-        }
         project.plugins.apply(BasePlugin)
         project.ext.Rpm = Rpm.class
     }

gradle-plugin-shadow/build.gradle

@@ -0,0 +1,45 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    implementation libs.asm
+    implementation libs.asm.commons
+    implementation libs.asm.util
+    testImplementation gradleTestKit()
+    testImplementation libs.spock.core
+    testImplementation libs.spock.junit4
+}
+
+gradlePlugin {
+    plugins {
+        shadowPlugin {
+            id = 'org.xbib.gradle.plugin.shadow'
+            implementationClass = 'org.xbib.gradle.plugin.shadow.ShadowPlugin'
+        }
+    }
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    pluginBundle {
+        website = scmUrl
+        vcsUrl = scmUrl
+        plugins {
+            shadowPlugin {
+                id = 'org.xbib.gradle.plugin.shadow'
+                version = project.version
+                description = 'Shadow plugin for Gradle'
+                displayName = 'Shadow plugin for Gradle'
+                tags = [ 'shadow' ]
+            }
+        }
+    }
+}

gradle-plugin-shadow/gradle.properties

@@ -0,0 +1 @@
+version = 2.0.0

gradle-plugin-shadow/src/docs/asciidoc/00-intro.adoc

@@ -0,0 +1,28 @@
+:tests: ../../test/groovy/org/xbib/gradle/plugin/shadow
+== Introduction
+
+Shadow is a Gradle plugin for combining dependency classes and resources with a project's into a single
+output Jar.
+The combined Jar is often referred to a __fat-jar__ or __uber-jar__.
+Shadow utilizes `JarInputStream` and `JarOutputStream` to efficiently process dependent libraries
+into the output jar without incurring the I/O overhead of expanding the jars to disk.
+
+=== Benefits of Shadow
+
+Shadowing a project output has a major use case:
+
+. Bundling and relocating common dependencies in libraries to avoid classpath conflicts
+
+==== Bundling
+
+Dependency bundling and relocation is the main use case for __library__ authors.
+The goal of a bundled library is to create a pre-packaged dependency for other libraries or applications to utilize.
+Often in these scenarios, a library may contain a dependency that a downstream library or application also uses.
+In __some__ cases, different versions of this common dependency can cause an issue in either the upstream library or
+the downstream application.
+These issues often manifest themselves as binary incompatibilities in either the library or application code.
+
+By utilizing Shadow's ability to __relocate__ the package names for dependencies, a library author can ensure that the
+library's dependencies will not conflict with the same dependency being declared by the downstream application.
+
+include::01-getting-started.adoc[]

gradle-plugin-shadow/src/docs/asciidoc/01-getting-started.adoc

@@ -0,0 +1,96 @@
+=== Getting Started
+
+[source,groovy,subs="+attributes"]
+----
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'org.xbib.gradle.plugin:gradle-plugin-shadow:{project-version}'
+    }
+}
+
+apply plugin: 'java'
+apply plugin: 'org.xbib.gradle.plugin.shadow'
+----
+
+Alternatively, the Gradle Plugin syntax can be used:
+
+[source,groovy,subs="+attributes"]
+----
+plugins {
+  id 'java'
+  id 'org.xbib.gradle.plugin.shadow' version '{project-version}'
+}
+----
+
+Shadow is a reactive plugin.
+This means that applying Shadow by itself will perform no configuration on your project.
+Instead, Shadow __reacts__ to the application of other plugins to decorate the project.
+
+This means, that for most users, the `java` or `groovy` plugins must be __explicitly__ applied
+to have the desired effect.
+
+=== Default Java/Groovy Tasks
+
+In the presence of the `java` or `groovy` plugins, Shadow will automatically configure the
+following behavior:
+
+* Adds a `shadowJar` task to the project.
+* Adds a `shadow` configuration to the project.
+* Configures the `shadowJar` task to include all sources from the project's `main` sourceSet.
+* Configures the `shadowJar` task to bundle all dependencies from the `runtime` configuration.
+* Configures the __classifier__ attribute of the `shadowJar` task to be `'all'` .
+* Configures the `shadowJar` task to generate a `Manifest` with:
+** Inheriting all configuration from the standard `jar` task.
+** Adds a `Class-Path` attribute to the `Manifest` that appends all dependencies from the `shadow` configuration
+* Configures the `shadowJar` task to __exclude__ any JAR index or cryptographic signature files matching the following patterns:
+** `META-INF/INDEX.LIST`
+** `META-INF/*.SF`
+** `META-INF/*.DSA`
+** `META-INF/*.RSA`
+* Creates and registers the `shadow` component in the project (used for integrating with `maven-publish`).
+* Configures the `uploadShadow` task (as part of the `maven` plugin) with the following behavior:
+** Removes the `compile` and `runtime` configurations from the `pom.xml` file mapping.
+** Adds the `shadow` configuration to the `pom.xml` file as `RUNTIME` scope.
+
+=== Shadowing Gradle Plugins
+
+Shadow is capable of automatically configuring package relocation for your dependencies.
+This is useful especially when building Gradle plugins where you want your dependencies to not conflict with versions
+provided by the Gradle runtime.
+
+[source,groovy,subs="+attributes"]
+----
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'org.xbib.gradle.plugin:shadow:{project-version}'
+    }
+}
+
+apply plugin: 'org.xbib.gradle.plugin.shadow'
+apply plugin: 'java'
+----
+
+Alternatively, the Gradle Plugin syntax can be used:
+
+[source,groovy,subs="+attributes"]
+----
+plugins {
+  id 'java'
+  id 'org.xbib.gradle.plugin.plugin-shadow' version '{project-version}'
+}
+----
+
+Applying the `plugin-shadow` plugin is the same as applying the standard `shadow` plugin with the additional creation
+of the `configureRelocationShadowJar` task.
+This task runs before the `shadowJar` task and scans the packages present in the dependencies that will be merged into
+the final jar and automatically configures relocation for them.
+By default the tasks relocates all packages to the `shadow.` prefix.
+For example `org.jdom2.JDOMException` becomes `shadow.org.jdom2.JDOMException`
+
+For more details see the sectinon <<Using Shadow to Package Gradle Plugins>>

gradle-plugin-shadow/src/docs/asciidoc/10-configuring.adoc

@@ -0,0 +1,106 @@
+== Configuring Shadow
+
+The link:{api}/tasks/ShadowJar.html[`ShadowJar`] task type extends from Gradle's
+https://docs.gradle.org/current/dsl/org.gradle.api.tasks.bundling.Jar.html[`Jar`] type.
+This means that all attributes and methods available on `Jar` are also available on
+link:{api}/tasks/ShadowJar.html[`ShadowJar`].
+Refer the __Gradle User Guide__ for https://docs.gradle.org/current/dsl/org.gradle.api.tasks.bundling.Jar.html[Jar] for
+details.
+
+=== Configuring Output Name
+
+Shadow configures the default `shadowJar` task to set the output JAR's `destinationDir`, `baseName`, `appendix`,
+`version`, and `extension` to the same default values as Gradle does for all `Jar` tasks.
+Additionally, it configures the `classifier` to be `all`.
+
+If working with a Gradle project with the name `myApp` and version `1.0`, the default `shadowJar` task will output a
+file at: `build/libs/myApp-1.0-all.jar`
+
+As with all `Jar` tasks in Gradle, these values can be overridden:
+
+.Output to `build/libs/shadow.jar`
+[source,groovy,indent=0]
+----
+include::{tests}/ShadowPluginSpec.groovy[tags=rename]
+----
+
+=== Configuring the Runtime Classpath
+
+Each Java JAR file contains a manifest file that provides meta data about the contents of the JAR file itself.
+When using a shadowed JAR file as an executable JAR, it is assumed that all necessary runtime classes are contained
+within the JAR itself.
+There may be situations where the desire is to **not** bundle select dependencies into the shadowed JAR file but
+they are still required for runtime execution.
+
+In these scenarios, Shadow creates a `shadow` configuration to declare these dependencies.
+Dependencies added to the `shadow` configuration are *not* bundled into the output JAR.
+Think of `configurations.shadow` as unmerged, runtime dependencies.
+The integration with the `maven` and `maven-publish` plugins will automatically configure dependencies added
+to `configurations.shadow` as `RUNTIME` scope dependencies in the resulting POM file.
+
+Additionally, Shadow automatically configures the manifest of the `shadowJar` task to contain a `Class-Path` entry
+in the JAR manifest.
+The value of the `Class-Path` entry is the name of all dependencies resolved in the `shadow` configuration
+for the project.
+
+[source,groovy,indent=0]
+----
+include::{tests}/ShadowPluginSpec.groovy[tags=shadowConfig]
+----
+
+Inspecting the `META-INF/MANIFEST.MF` entry in the JAR file will reveal the following attribute:
+[source,property,indent=0]
+----
+Class-Path: junit-3.8.2.jar
+----
+
+When deploying a shadowed JAR as an execution JAR, it is important to note that any non-bundled runtime dependencies
+**must** be deployed in the location specified in the `Class-Path` entry in the manifest.
+
+=== Configuring the JAR Manifest
+
+Beyond the automatic configuration of the `Class-Path` entry, the `shadowJar` manifest is configured in a number of ways.
+First, the manifest for the `shadowJar` task is configured to __inherit__ from the manifest of the standard `jar` task.
+This means that any configuration performed on the `jar` task will propagate to the `shadowJar` tasks.
+
+[source,groovy,indent=0]
+----
+include::{tests}/ShadowPluginSpec.groovy[tags=jarManifest]
+----
+
+Inspecting the `META-INF/MANIFEST.MF` entry in the JAR file will revel the following attribute:
+[source,property,indent=0]
+----
+Class-Path: /libs/a.jar
+----
+
+If it is desired to inherit a manifest from a JAR task other than the standard `jar` task, the `inheritFrom` methods
+on the `shadowJar.manifest` object can be used to configure the upstream.
+
+[source,groovy,indent=0]
+----
+
+task testJar(type: Jar) {
+  manifest {
+    attributes 'Description': 'This is an application JAR'
+  }
+}
+
+shadowJar {
+  manifest {
+    inheritFrom project.tasks.testJar.manifest
+  }
+}
+----
+
+include::11-filtering-contents.adoc[]
+
+include::12-controlling-dependencies.adoc[]
+
+include::13-controlling-merging.adoc[]
+
+include::14-package-relocation.adoc[]
+
+include::15-minimizing.adoc[]
+
+include::16-reproducible-builds.adoc[]

gradle-plugin-shadow/src/docs/asciidoc/11-filtering-contents.adoc

@@ -0,0 +1,27 @@
+=== Filtering Shadow Jar Contents
+
+The final contents of a shadow JAR can be filtered using the `exclude` and `include` methods inherited from Gradle's
+`Jar` task type.
+
+Refer to the https://docs.gradle.org/current/dsl/org.gradle.api.tasks.bundling.Jar.html[Jar] documentation for details
+on the various versions of the methods and their behavior.
+
+When using `exclude`/`include` with a `ShadowJar` task, the resulting copy specs are applied to the __final__ JAR
+contents.
+This means that, the configuration is applied to the individual files from both the project source set or __any__
+of the dependencies to be merged.
+
+.Exclude a file from Shadow Jar
+[source,groovy,indent=0]
+----
+include::{tests}/FilteringSpec.groovy[tags=excludeFile]
+----
+
+Excludes and includes can be combined just like a normal `Jar` task, with `excludes` taking precendence over `includes`.
+Additionally, ANT style patterns can be used to match multiple files.
+
+.Configuring output using ANT patterns
+[source,groovy,indent=0]
+----
+include::{tests}/FilteringSpec.groovy[tags=excludeOverInclude]
+----

gradle-plugin-shadow/src/docs/asciidoc/12-controlling-dependencies.adoc

@@ -0,0 +1,118 @@
+=== Configuring Shadowed Dependencies
+
+Shadow configures the default `shadowJar` task to merge all dependencies from the project's `runtime` configuration
+into the final JAR.
+The configurations to from which to source dependencies for the merging can be configured using the `configurations` property
+of the link:{api}/tasks/ShadowJar.html[`ShadowJar`] task type.
+
+[source,groovy,indent=0]
+----
+shadowJar {
+  configurations = [project.configurations.compile]
+}
+----
+
+The above code sample would configure the `shadowJar` task to merge depdencies from only the `compile` configuration.
+This means any dependency declared in the `runtime` configuration would be **not** be included in the final JAR.
+
+[NOTE]
+====
+Note the literal use of `project.configurations` when setting the `configurations` attribute of a
+link:{api}/tasks/ShadowJar.html[`ShadowJar`] task.
+This is **required**. It maybe be tempting to specify `configurations = [configurations.compile]` but this will not
+have the intended effect, as `configurations.compile` will try to delegate to the `configurations` property of the
+the link:{api}/tasks/ShadowJar.html[`ShadowJar`] task instead of the `project`
+====
+
+=== Embedding Jar Files Inside Your Shadow Jar
+
+Because of the way that Gradle handles dependency configuration, from a plugin perspective, shadow is unable to distinguish between a jar file configured as a dependency and a jar file included in the resource folder.  This means that any jar found in a resource directory will be merged into the shadow jar the same as any other dependency.  If your intention is to embed the jar inside, you must rename the jar as to not end with `.jar` before the shadow task begins.
+
+=== Filtering Dependencies
+
+Individual dependencies can be filtered from the final JAR by using the `dependencies` block of a
+link:{api}/tasks/ShadowJar.html[`ShadowJar`] task.
+Dependency filtering does **not** apply to transitive dependencies.
+That is, excluding a dependency does not exclude any of its dependencies from the final JAR.
+
+The `dependency` blocks provides a number of methods for resolving dependencies using the notations familiar from
+Gradle's `configurations` block.
+
+.Exclude an Module Dependency
+[source,groovy,indent=0]
+----
+include::{tests}/FilteringSpec.groovy[tags=excludeDep]
+----
+
+.Exclude a Project Dependency
+[source,groovy,indent=0]
+----
+include::{tests}/FilteringSpec.groovy[tags=excludeProject]
+----
+
+[NOTE]
+====
+While not being able to filter entire transitive dependency graphs might seem like an oversight, it is necessary
+because it would not be possible to intelligently determine the build author's intended results when there is a
+common dependency between two 1st level dependencies when one is excluded and the other is not.
+====
+
+==== Using Regex Patterns to Filter Dependencies
+
+Dependencies can be filtered using regex patterns.
+Coupled with the `<group>:<artifact>:<version>` notation for dependencies, this allows for excluding/including
+using any of these individual fields.
+
+.Exclude Any Version of a Dependency
+[source,groovy,indent=0]
+----
+include::{tests}/FilteringSpec.groovy[tags=excludeDepWildcard]
+----
+
+Any of the individual fields can be safely absent and will function as though a wildcard was specified.
+
+.Ignore Dependency Version
+[source,groovy,indent=0]
+----
+shadowJar {
+  dependencies {
+    exclude(dependency('shadow:d'))
+  }
+}
+----
+
+The above code snippet is functionally equivalent to the previous example.
+
+This same patten can be used for any of the dependency notation fields.
+
+.Ignoring An Artifact Regardless of Group
+[source,groovy,indent=0]
+----
+shadowJar {
+  dependencies {
+    exclude(dependency(':d:1.0'))
+  }
+}
+----
+
+.Excluding All Artifacts From Group
+[source,groovy,indent=0]
+----
+shadowJar {
+  dependencies {
+    exclude(dependency('shadow::1.0'))
+  }
+}
+----
+
+==== Programmatically Selecting Dependencies to Filter
+
+If more complex decisions are needed to select the dependencies to be included, the
+link:{api}/tasks/ShadowJar.html#dependencies(Action<DependencyFilter>)[`dependencies`] block provides a
+method that accepts a `Closure` for selecting dependencies.
+
+.Selecting Dependencies to Filter With a Spec
+[source,groovy,indent=0]
+----
+include::{tests}/FilteringSpec.groovy[tags=excludeSpec]
+----

gradle-plugin-shadow/src/docs/asciidoc/13-controlling-merging.adoc

@@ -0,0 +1,151 @@
+=== Controlling JAR Content Merging
+
+Shadow allows for customizing the process by which the output JAR is generated through the
+link:{api}/transformers/Transformer.html[`Transformer`] interface.
+This is a concept that has been carried over from the original Maven Shade implementation.
+A link:{api}/transformers/Transformer.html[`Transformer`] is invoked for each entry in the JAR before being written to
+the final output JAR.
+This allows a link:{api}/transformers/Transformer.html[`Transformer`] to determine if it should process a particular
+entry and apply any modifications beforewriting the stream to the output.
+
+.Adding a Transformer
+[source,groovy,indent=0]
+----
+shadowJar {
+  transform(MyTransformer.class)
+}
+----
+
+Additionally, a `Transformer` can accept a `Closure` to configure the provided `Transformer`.
+
+.Configuring a Transformer
+[source,groovy,indent=0]
+----
+shadowJar {
+  transform(MyTransformer.class) {
+    enable = true
+  }
+}
+----
+
+An instantiated instance of a `Transformer` can also be provided.
+
+.Adding a Transformer Instance
+[source,groovy,indent=0]
+----
+shadowJar {
+  transform(new MyTransformer(enabled: true))
+}
+----
+
+==== Merging Service Descriptor Files
+
+Java libraries often contain service descriptors files in the `META-INF/services` directory of the JAR.
+A service descriptor typically contains a line delimited list of classes that are supported for a particular __service__.
+At runtime, this file is read and used to configure library or application behavior.
+
+Multiple dependencies may use the same service descriptor file name.
+In this case, it is generally desired to merge the content of each instance of the file into a single output file.
+The link:{api}/transformers/ServiceFileTransformer.html[`ServiceFileTransformer`] class is used to perform this merging.
+By default, it will merge each copy of a file under `META-INF/services` into a single file in the output JAR.
+
+.Merging Service Files
+[source,groovy,indent=0]
+----
+shadowJar {
+  mergeServiceFiles()
+}
+----
+
+The above code snippet is a convenience syntax for calling
+link:{api}/tasks/ShadowJar.html#transform(Class++<? extends Transformer>++)[`transform(ServiceFileTransformer.class)`].
+
+[NOTE]
+====
+Groovy Extension Module descriptor files (located at `META-INF/services/org.codehaus.groovy.runtime.ExtensionModule`)
+are ignored by the link:{api}/transformers/ServiceFileTransformer.html[`ServiceFileTransformer`].
+This is due to these files having a different syntax than standard service descriptor files.
+Use the link:{api}/tasks/ShadowJar.html#mergeGroovyExtensionModules()[`mergeGroovyExtensionModules()`] method to merge
+these files if your dependencies contain them.
+====
+
+===== Configuring the Location of Service Descriptor Files
+
+By default the link:{api}/transformers/ServiceFileTransformer.html[`ServiceFileTransformer`] is configured to merge
+files in `META-INF/services`.
+This directory can be overridden to merge descriptor files in a different location.
+
+.Merging Service Files in a Specific Directory
+[source,groovy,indent=0]
+----
+shadowJar {
+  mergeServiceFiles {
+    path = 'META-INF/custom'
+  }
+}
+----
+
+===== Excluding/Including Specific Service Descriptor Files From Merging
+
+The link:{api}/transformers/ServiceFileTransformer.html[`ServiceFileTransformer`] class supports specifying specific
+files to include or exclude from merging.
+
+.Excluding a Service Descriptor From Merging
+[source,groovy,indent=0]
+----
+shadowJar {
+  mergeServiceFiles {
+    exclude 'META-INF/services/com.acme.*'
+  }
+}
+----
+
+==== Merging Groovy Extension Modules
+
+Shadow provides a specific transformer for dealing with Groovy extension module files.
+This is due to their special syntax and how they need to be merged together.
+The link:{api}/transformers/GroovyExtensionModuleTransformer.html[`GroovyExtensionModuleTransformer`] will handle these
+files.
+The link:{api}/tasks/ShadowJar.html[`ShadowJar`] task also provides a short syntax method to add this transformer.
+
+.Merging Groovy Extension Modules
+[source,groovy,indent=0]
+----
+shadowJar {
+  mergeGroovyExtensionModules()
+}
+----
+
+==== Appending Text Files
+
+Generic text files can be appended together using the
+link:{api}/transformers/AppendingTransformer.html[`AppendingTransformer`].
+Each file is appended using new lines to separate content.
+The link:{api}/tasks/ShadowJar.html[`ShadowJar`] task provides a short syntax method of
+link:{api}/tasks/ShadowJar.html#append(java.lang.String)[`append(String)`] to configure this transformer.
+
+.Appending a Property File
+[source,groovy,indent=0]
+----
+shadowJar {
+  append 'test.properties'
+}
+----
+
+==== Appending XML Files
+
+XML files require a special transformer for merging.
+The link:{api}/transformers/XmlAppendingTransformer.html[`XmlAppendingTransformer`] reads each XML document and merges
+each root element into a single document.
+There is no short syntax method for the link:{api}/transformers/XmlAppendingTransformer.html[`XmlAppendingTransformer`].
+It must be added using the link:{api}/tasks/ShadowJar.html#transform(++Class<? extends Transformer>++)[`transform`] methods.
+
+.Appending a XML File
+[source,groovy,indent=0]
+----
+shadowJar {
+  tranform(XmlAppendingTransformer.class) {
+    resource = 'properties.xml'
+  }
+}
+----

gradle-plugin-shadow/src/docs/asciidoc/14-package-relocation.adoc

@@ -0,0 +1,72 @@
+=== Relocating Packages
+
+Shade is capable of scanning a project's classes and relocating specific dependencies to a new location.
+This is often required when one of the dependencies is susceptible to breaking changes in versions or
+to classpath pollution in a downstream project.
+
+[NOTE]
+====
+Google's Guava and the ASM library are typical cases where package relocation can come in handy.
+====
+
+Shadow uses the ASM library to modify class byte code to replace the package name and any import
+statements for a class.
+Any non-class files that are stored within a package structure are also relocated to the new location.
+
+.Relocating a Package
+[source,groovy,indent=0]
+----
+include::{tests}/RelocationSpec.groovy[tags=relocate]
+----
+
+The code snippet will rewrite the location for any class in the `junit.framework` to be `shadow.junit`.
+For example, the class `junit.textui.TestRunner` becomes `shadow.junit.TestRunner`.
+In the resulting JAR, the class file is relocated from `junit/textui/TestRunner.class` to
+`shadow/junit/TestRunner.class`.
+
+[NOTE]
+====
+Relocation operates at a package level.
+It is not necessary to specify any patterns for matching, it will operate simply on the prefix
+provided.
+====
+
+[NOTE]
+====
+Relocation will be applied globally to all instance of the matched prefix.
+That is, it does **not** scope to __only__ the dependencies being shadowed.
+Be specific as possible when configuring relocation as to avoid unintended relocations.
+====
+
+==== Filtering Relocation
+
+Specific classes or files can be `included`/`excluded` from the relocation operation if necessary.
+
+.Configuring Filtering for Relocation
+[source,groovy,indent=0]
+----
+include::{tests}/RelocationSpec.groovy[tags=relocateFilter]
+----
+
+==== Automatically Relocating Dependencies
+Shadow ships with a task that can be used to automatically configure all packages from all dependencies to be relocated.
+To configure automatic dependency relocation, declare a task of type `ConfigureShadowRelocation` and configure the
+`target` parameter to be the `ShadowJar` task you wish to auto configure. You will also need to declared a task
+dependency so the tasks execute in the correct order.
+.Configure Auto Relocation
+[source,groovy]
+----
+task relocateShadowJar(type: ConfigureShadowRelocation) {
+    target = tasks.shadowJar
+    prefix = "myapp" // Default value is "shadow"
+}
+tasks.shadowJar.dependsOn tasks.relocateShadowJar
+----
+[NOTE]
+====
+Configuring package auto relocation can add significant time to the shadow process as it will process all dependencies
+in the configurations declared to be shadowed. By default, this is the `runtime` or `runtimeClasspath` configurations.
+Be mindful that some Gradle plugins (such as `java-gradle-plugin` will automatically add dependencies to your class path
+(e.g. `java-gradle-plugin` automatically adds the full Gradle API to your `compile` configuratinon. You may need to
+remove these dependencies if you do not intend to shadow them into your library.
+====

gradle-plugin-shadow/src/docs/asciidoc/15-minimizing.adoc

@@ -0,0 +1,25 @@
+=== Minimizing
+
+Shadow can automatically remove all classes of dependencies that are not used by the project, thereby minimizing the resulting shadowed JAR.
+
+.Minimizing an shadow JAR
+[source,groovy,indent=0]
+----
+shadowJar {
+  minimize()
+}
+----
+
+A dependency can be excluded from the minimization process thereby forcing it's inclusion the shadow JAR.
+This is useful when the dependency analyzer cannot find the usage of a class programmatically, for example if the class
+is loaded dynamically via `Class.forName(String)`.
+
+.Force a class to be retained during minimization
+[source,groovy,indent=0]
+----
+shadowJar {
+  minimize {
+    exclude(dependency('org.scala-lang:.*:.*'))
+  }
+}
+----

gradle-plugin-shadow/src/docs/asciidoc/16-reproducible-builds.adoc

@@ -0,0 +1,16 @@
+=== Reproducible Builds
+
+Because JAR files contain the timestamp of the included files, it is often difficult to create reproducible builds
+from a source commit that results in a hash identical file.
+Gradle supports reproducible JAR creation by setting the timestamps of included files to a consistent value.
+Shadow includes support for overriding file timestamps. By default, Shadow will preserve
+the file timestamps when creating the Shadow JAR. To set timestamps to a consistent value (1980/1/1 00:00:00),
+set the `preserveFileTimestamps` property to `false` on the `ShadowJar` task.
+
+.Reset file timestamps
+[source,groovy,indent=0]
+----
+shadowJar {
+  preserveFileTimestamps = false
+}
+----

gradle-plugin-shadow/src/docs/asciidoc/20-custom-tasks.adoc

@@ -0,0 +1,20 @@
+== Creating a Custom ShadowJar Task
+
+The built in `shadowJar` task only provides an output for the `main` source set of the project.
+It is possible to add arbitrary link:{api}/tasks/ShadowJar.html[`ShadowJar`] tasks to a project.
+When doing so, ensure that the `configurations` property is specified to inform Shadow which dependencies to merge
+into the output.
+
+.Shadowing Test Sources and Dependencies
+[source,groovy,indent=0]
+----
+task testJar(type: ShadowJar) {
+  classifier = 'tests'
+  from sourceSets.test.output
+  configurations = [project.configurations.testRuntime]
+}
+----
+
+The code snippet above will geneated a shadowed JAR contain both the `main` and `test` sources as well as all `runtime`
+and `testRuntime` dependencies.
+The file is output to `build/libs/<project>-<version>-tests.jar`.

gradle-plugin-shadow/src/docs/asciidoc/40-publishing.adoc

@@ -0,0 +1,69 @@
+== Publishing Shadow JARs
+
+=== Publishing with Maven-Publish Plugin
+
+The Shadow plugin will automatically configure the necessary tasks in the presence of Gradle's
+`maven-publish` plugin.
+The plugin provides the `component` method from the `shadow` extension to configure the
+publication with the necessary artifact and dependencies in the POM file.
+
+.Publishing a Shadow JAR with the Maven-Publish Plugin
+[source,groovy,indent=0]
+----
+apply plugin: 'java'
+apply plugin: 'maven-publish'
+apply plugin: 'org.xbib.plugin.gradle.shadow'
+
+publishing {
+  publications {
+    shadow(MavenPublication) { publication ->
+      project.shadow.component(publication)
+    }
+  }
+  repositories {
+    maven {
+      url "http://repo.myorg.com"
+    }
+  }
+}
+----
+
+=== Publishing with Maven Plugin
+
+The Shadow plugin will automatically configure the necessary tasks in the presence of Gradle's
+`maven` plugin.
+To publish the JAR, simply configure the publish location for the `uploadShadow` task and execute it.
+
+.Publishing a Shadow JAR with the Maven Plugin
+[source,groovy,indent=0]
+----
+apply plugin: 'java'
+apply plugin: 'maven'
+apply plugin: 'org.xbib.gradle.plugin.shadow'
+
+uploadShadow {
+  repositories {
+    mavenDeployer {
+      repository(url: "http://repo.myorg.com")
+    }
+  }
+}
+----
+
+=== Shadow Configuration and Publishing
+
+The Shadow plugin provides a custom configuration (`configurations.shadow`) to specify
+runtime dependencies that are *not* merged into the final JAR file.
+When configuring publishing with the Shadow plugin, the dependencies in the `shadow`
+configuration, are translated to become `RUNTIME` scoped dependencies of the
+published artifact.
+
+No other dependencies are automatically configured for inclusion in the POM file.
+For example, excluded dependencies are *not* automatically added to the POM file or
+if the configuration for merging are modified by specifying
+`shadowJar.configurations = [configurations.myconfiguration]`, there is no automatic
+configuration of the POM file.
+
+This automatic configuration occurs _only_ when using the above methods for
+configuring publishing. If this behavior is not desirable, then publishing *must*
+be manually configured.

gradle-plugin-shadow/src/docs/asciidoc/50-multi-project-builds.adoc

@@ -0,0 +1,21 @@
+== Using Shadow in Multi-Project Builds
+
+When using Shadow in a multi-project build, project dependencies will be treated the same as
+external dependencies.
+That is a project dependency will be merged into the `shadowJar` output of the project that
+is applying the Shadow plugin.
+
+=== Depending on the Shadow Jar from Another Project
+
+In a multi-project build there may be one project that applies Shadow and another that
+requires the shadowed JAR as a dependency.
+In this case, use Gradle's normal dependency declaration mechanism to depend on the `shadow`
+configuration of the shadowed project.
+
+.Depending On Shadow Output of Project
+[source,groovy,indent=0]
+----
+dependencies {
+  compile project(path: 'api', configuration: 'shadow')
+}
+----

gradle-plugin-shadow/src/docs/asciidoc/60-shadowing-plugins.adoc

@@ -0,0 +1,49 @@
+== Using Shadow to Package Gradle Plugins
+
+In some scenarios, writing a Gradle plugin can be problematic because your plugin may depend on a version that
+conflicts with the same dependency provided by the Gradle runtime. If this is the case, then you can utilize Shadow
+to relocate your dependencies to a different package name to avoid the collision.
+
+Configuring the relocation has always been possible, but the build author is required to know all the package names
+before hand. Shadow introduces a new task type `ConfigureShadowRelocation`.
+Tasks of this type are configured to target an instance of a `ShadowJar` task and run immediately before it.
+
+The `ConfigureShadowRelocation` task, scans the dependencies from the configurations specified on the associated
+`ShadowJar` task and collects the package names contained within them. It then configures relocation for these
+packages using the specified `prefix` on the associated `ShadowJar` task.
+
+While this is useful for developing Gradle plugins, nothing about the `ConfigureShadowRelocation` task is tied to
+Gradle projects. It can be used for standard Java or Groovy projects.
+
+A simple Gradle plugin can use this feature by applying the `shadow` plugin and configuring the dependencies
+like so:
+
+[source,groovy,subs="+attributes"]
+----
+import org.xbib.gradle.plugin.shadow.tasks.ConfigureShadowRelocation
+
+plugins {
+  id 'java'
+  id 'org.xbib.gradle.plugin.shadow' version '{project-version}'
+}
+
+dependencies {
+    shadow localGroovy()
+    shadow gradleApi()
+
+    compile 'org.ow2.asm:asm:7.0-beta'
+    compile 'org.ow2.asm:asm-commons:7.0-beta'
+    compile 'org.ow2.asm:asm-util:7.0-beta'
+}
+
+task relocateShadowJar(type: ConfigureShadowRelocation) {
+    target = tasks.shadowJar
+}
+tasks.shadowJar.dependsOn tasks.relocateShadowJar
+
+----
+
+Note that the `localGroovy()` and `gradleApi()` dependencies are added to the `shadow` configuration instead of the
+normal `compile` configuration. These dependencies are provided by Gradle to compile your project but are ultimately
+provided by the Gradle runtime when executing the plugin. Thus, it is __not__ advisable to bundle these dependencies
+with your plugin.

gradle-plugin-shadow/src/docs/asciidoc/99-about.adoc

@@ -0,0 +1,23 @@
+== About This Project
+
+John Engelman about the original Shadow plugin:
+
+____
+I started this project in December of 2012. We were working on converting from a monolithic application into a the
+new hot jazz of "microservices" using Dropwizard.
+I had also just started learning about Gradle and I knew that the incremental build system it provided would benefit
+our development team greatly.
+Unfortunately, the closest thing that Gradle had to Maven's Shade plugin was its ability to create application TARs and
+ZIPs.
+
+So, Charlie Knudsen and myself set out to port the existing Shade code into a Gradle plugin.
+This port is what existing up until the `0.9` milestone releases for Shadow.
+It functioned, but it wasn't idiomatic Gradle by any means.
+
+Starting with 0.9, Shadow was rewritten from the ground up as standard Gradle plugin and leveraged as much of Gradle's
+classes and concepts as possible.
+At the same time as the 0.9 release, Gradle was announcing the https://plugins.gradle.org[Gradle Plugin Portal] and
+so Shadow was published there.
+
+Shadow has had nearly ~900,000 downloads from Bintray and countless more from the Gradle Plugin Portal.
+____

gradle-plugin-shadow/src/docs/asciidoc/index.adoc

@@ -0,0 +1,32 @@
+:src: ../
+:tests: {src}/test/groovy/org/xbib/gradle/plugin/shadow
+:api: api/org/xbib/gradle/plugin/shadow
+:docinfo1:
+ifdef::env-github[]
+:note-caption: :information-source:
+endif::[]
+
+= Gradle Shadow Plugin User Guide & Examples
+
+:revnumber: {project-version}
+
+NOTE: This documentation was taken from the original Shadow Plugin and is copyrighted by John R. Engelman.
+References to older original Shadow Plugin versions have been removed for consistency.
+The references to the application mode (runShadow) are no longer supported and have been removed.
+To create application images, use Java Platform Module System, especially the `jlink` tool.
+
+link:api/index.html[API Docs]
+
+include::00-intro.adoc[]
+
+include::10-configuring.adoc[]
+
+include::20-custom-tasks.adoc[]
+
+include::40-publishing.adoc[]
+
+include::50-multi-project-builds.adoc[]
+
+include::60-shadowing-plugins.adoc[]
+
+include::99-about.adoc[]

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/ShadowBasePlugin.groovy

@@ -0,0 +1,21 @@
+package org.xbib.gradle.plugin.shadow
+
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.util.GradleVersion
+
+class ShadowBasePlugin implements Plugin<Project> {
+
+    static final String EXTENSION_NAME = 'shadow'
+
+    static final String CONFIGURATION_NAME = 'shadow'
+
+    @Override
+    void apply(Project project) {
+        if (GradleVersion.current() < GradleVersion.version('4.10')) {
+            throw new IllegalArgumentException('shadow requires at least Gradle 4.10')
+        }
+        project.extensions.create(EXTENSION_NAME, ShadowExtension, project)
+        project.configurations.create(CONFIGURATION_NAME)
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/ShadowExtension.groovy

@@ -0,0 +1,38 @@
+package org.xbib.gradle.plugin.shadow
+
+import org.gradle.api.Project
+import org.gradle.api.artifacts.SelfResolvingDependency
+import org.gradle.api.file.CopySpec
+import org.gradle.api.publish.maven.MavenPom
+import org.gradle.api.publish.maven.MavenPublication
+
+class ShadowExtension {
+
+    CopySpec applicationDistribution
+    Project project
+
+    ShadowExtension(Project project) {
+        this.project = project
+        applicationDistribution = project.copySpec {}
+    }
+
+    void component(MavenPublication publication) {
+
+        publication.artifact(project.tasks.shadowJar)
+        publication.pom { MavenPom pom ->
+            pom.withXml { xml ->
+                def dependenciesNode = xml.asNode().appendNode('dependencies')
+
+                project.configurations.shadow.allDependencies.each {
+                    if (! (it instanceof SelfResolvingDependency)) {
+                        def dependencyNode = dependenciesNode.appendNode('dependency')
+                        dependencyNode.appendNode('groupId', it.group)
+                        dependencyNode.appendNode('artifactId', it.name)
+                        dependencyNode.appendNode('version', it.version)
+                        dependencyNode.appendNode('scope', 'runtime')
+                    }
+                }
+            }
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/ShadowJavaPlugin.groovy

@@ -0,0 +1,58 @@
+package org.xbib.gradle.plugin.shadow
+
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.plugins.JavaPluginConvention
+import org.gradle.configuration.project.ProjectConfigurationActionContainer
+import org.xbib.gradle.plugin.shadow.tasks.ShadowJar
+
+import javax.inject.Inject
+
+class ShadowJavaPlugin implements Plugin<Project> {
+
+    static final String SHADOW_JAR_TASK_NAME = 'shadowJar'
+
+    static final String SHADOW_GROUP = 'Shadow'
+
+    private final ProjectConfigurationActionContainer configurationActionContainer;
+
+    @Inject
+    ShadowJavaPlugin(ProjectConfigurationActionContainer configurationActionContainer) {
+        this.configurationActionContainer = configurationActionContainer
+    }
+
+    @Override
+    void apply(Project project) {
+        configureShadowTask(project)
+        project.configurations.compileClasspath.extendsFrom project.configurations.shadow
+    }
+
+    protected void configureShadowTask(Project project) {
+        JavaPluginConvention convention = project.convention.getPlugin(JavaPluginConvention)
+        project.tasks.register(SHADOW_JAR_TASK_NAME, ShadowJar) { shadow ->
+            shadow.group = SHADOW_GROUP
+            shadow.description = 'Create a combined JAR of project and runtime dependencies'
+            shadow.archiveClassifier.set("all")
+            shadow.manifest.inheritFrom project.tasks.jar.manifest
+            def libsProvider = project.provider { -> [project.tasks.jar.manifest.attributes.get('Class-Path')] }
+            def files = project.objects.fileCollection().from { ->
+                project.configurations.findByName(ShadowBasePlugin.CONFIGURATION_NAME)
+            }
+            shadow.doFirst {
+                if (!files.empty) {
+                    def libs = libsProvider.get()
+                    libs.addAll files.collect { "${it.name}" }
+                    manifest.attributes 'Class-Path': libs.findAll { it }.join(' ')
+                }
+            }
+            shadow.from(convention.sourceSets.main.output)
+            shadow.configurations = [project.configurations.findByName('runtimeClasspath') ?
+                                             project.configurations.runtimeClasspath : project.configurations.runtime]
+            shadow.exclude('META-INF/INDEX.LIST', 'META-INF/*.SF', 'META-INF/*.DSA', 'META-INF/*.RSA', 'module-info.class')
+            shadow.dependencies {
+                exclude(dependency(project.dependencies.gradleApi()))
+            }
+            project.artifacts.add(ShadowBasePlugin.CONFIGURATION_NAME, shadow)
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/ShadowPlugin.groovy

@@ -0,0 +1,31 @@
+package org.xbib.gradle.plugin.shadow
+
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.plugins.JavaPlugin
+import org.xbib.gradle.plugin.shadow.tasks.ShadowJar
+
+class ShadowPlugin implements Plugin<Project> {
+
+    @Override
+    void apply(Project project) {
+        project.plugins.apply(ShadowBasePlugin)
+        project.plugins.withType(JavaPlugin) {
+            project.plugins.apply(ShadowJavaPlugin)
+        }
+        def rootProject = project.rootProject
+        rootProject.plugins.withId('com.gradle.build-scan') {
+            rootProject.buildScan.buildFinished {
+                def shadowTasks = project.tasks.withType(ShadowJar)
+                shadowTasks.each { task ->
+                    if (task.didWork) {
+                        task.stats.buildScanData.each { k, v ->
+                            rootProject.buildScan.value "shadow.${task.path}.${k}", v.toString()
+                        }
+                        rootProject.buildScan.value "shadow.${task.path}.configurations", task.configurations*.name.join(", ")
+                    }
+                }
+            }
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/ShadowStats.groovy

@@ -0,0 +1,81 @@
+package org.xbib.gradle.plugin.shadow
+
+import groovy.util.logging.Log
+import org.gradle.api.GradleException
+
+@Log
+class ShadowStats {
+
+    long totalTime
+    long jarStartTime
+    long jarEndTime
+    int jarCount = 1
+    boolean processingJar
+    Map<String, String> relocations = [:]
+
+    void relocate(String src, String dst) {
+        relocations[src] = dst
+    }
+
+    String getRelocationString() {
+        def maxLength = relocations.keySet().collect { it.length() }.max()
+        relocations.collect { k, v -> "${k} ${separator(k, maxLength)} ${v}"}.sort().join("\n")
+    }
+
+    String separator(String key, int max) {
+        return "→"
+    }
+
+    void startJar() {
+        if (processingJar) throw new GradleException("Can only time one entry at a time")
+        processingJar = true
+        jarStartTime = System.currentTimeMillis()
+    }
+
+    void finishJar() {
+        if (processingJar) {
+            jarEndTime = System.currentTimeMillis()
+            jarCount++
+            totalTime += jarTiming
+            processingJar = false
+        }
+    }
+
+    void printStats() {
+        println this
+    }
+
+    long getJarTiming() {
+        jarEndTime - jarStartTime
+    }
+
+    double getTotalTimeSecs() {
+        totalTime / 1000
+    }
+
+    double getAverageTimePerJar() {
+        totalTime / jarCount
+    }
+
+    double getAverageTimeSecsPerJar() {
+        averageTimePerJar / 1000
+    }
+    
+    String toString() {
+        StringBuilder sb = new StringBuilder()
+        sb.append "*******************\n"
+        sb.append "GRADLE SHADOW STATS\n"
+        sb.append "\n"
+        sb.append "Total Jars: $jarCount (includes project)\n"
+        sb.append "Total Time: ${totalTimeSecs}s [${totalTime}ms]\n"
+        sb.append "Average Time/Jar: ${averageTimeSecsPerJar}s [${averageTimePerJar}ms]\n"
+        sb.append "*******************"
+    }
+
+    Map<String, String> getBuildScanData() {
+        [
+                dependencies: jarCount,
+                relocations: relocationString
+        ]
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/impl/RelocatorRemapper.groovy

@@ -0,0 +1,94 @@
+package org.xbib.gradle.plugin.shadow.impl
+
+import org.objectweb.asm.commons.Remapper
+import org.xbib.gradle.plugin.shadow.relocation.RelocateClassContext
+import org.xbib.gradle.plugin.shadow.relocation.RelocatePathContext
+import org.xbib.gradle.plugin.shadow.relocation.Relocator
+import org.xbib.gradle.plugin.shadow.tasks.ShadowCopyAction
+import org.xbib.gradle.plugin.shadow.ShadowStats
+
+import java.util.regex.Matcher
+import java.util.regex.Pattern
+
+class RelocatorRemapper extends Remapper {
+
+    private final Pattern classPattern = Pattern.compile("(\\[*)?L(.+)")
+
+    List<Relocator> relocators
+    ShadowStats stats
+
+    RelocatorRemapper(List<Relocator> relocators, ShadowStats stats) {
+        this.relocators = relocators
+        this.stats = stats
+    }
+
+    boolean hasRelocators() {
+        return !relocators.empty
+    }
+
+    Object mapValue(Object object) {
+        if (object instanceof String) {
+            String name = (String) object
+            String value = name
+
+            String prefix = ""
+            String suffix = ""
+
+            Matcher m = classPattern.matcher(name)
+            if (m.matches()) {
+                prefix = m.group(1) + "L"
+                suffix = ""
+                name = m.group(2)
+            }
+
+            RelocateClassContext classContext = RelocateClassContext.builder().className(name).stats(stats).build()
+            RelocatePathContext pathContext = RelocatePathContext.builder().path(name).stats(stats).build()
+            for (Relocator r : relocators) {
+                if (r.canRelocateClass(classContext)) {
+                    value = prefix + r.relocateClass(classContext) + suffix
+                    break
+                } else if (r.canRelocatePath(pathContext)) {
+                    value = prefix + r.relocatePath(pathContext) + suffix
+                    break
+                }
+            }
+
+            return value
+        }
+
+        return super.mapValue(object)
+    }
+
+    String map(String name) {
+        String value = name
+
+        String prefix = ""
+        String suffix = ""
+
+        Matcher m = classPattern.matcher(name)
+        if (m.matches()) {
+            prefix = m.group(1) + "L"
+            suffix = ""
+            name = m.group(2)
+        }
+
+        RelocatePathContext pathContext = RelocatePathContext.builder().path(name).stats(stats).build()
+        for (Relocator r : relocators) {
+            if (r.canRelocatePath(pathContext)) {
+                value = prefix + r.relocatePath(pathContext) + suffix
+                break
+            }
+        }
+
+        return value
+    }
+
+    String mapPath(String path) {
+        map(path.substring(0, path.indexOf('.')))
+    }
+
+    String mapPath(ShadowCopyAction.RelativeArchivePath path) {
+        mapPath(path.pathString)
+    }
+
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/Clazz.groovy

@@ -0,0 +1,85 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+class Clazz implements Comparable<Clazz> {
+
+    private final Set<Clazz> dependencies = new HashSet<Clazz>()
+
+    private final Set<Clazz> references = new HashSet<Clazz>()
+
+    private final Set<ClazzpathUnit> units = new HashSet<ClazzpathUnit>()
+
+    private final String name
+
+    Clazz( final String pName ) {
+        name = pName;
+    }
+
+    String getName() {
+        name
+    }
+
+    void addClazzpathUnit(ClazzpathUnit pUnit ) {
+        units.add(pUnit)
+    }
+
+    void removeClazzpathUnit( ClazzpathUnit pUnit ) {
+        units.remove(pUnit)
+    }
+
+    Set<ClazzpathUnit> getClazzpathUnits() {
+        units
+    }
+
+    void addDependency( final Clazz pClazz ) {
+        pClazz.references.add(this)
+        dependencies.add(pClazz)
+    }
+
+    public void removeDependency( final Clazz pClazz ) {
+        pClazz.references.remove(this)
+        dependencies.remove(pClazz)
+    }
+
+    Set<Clazz> getDependencies() {
+        return dependencies
+    }
+
+    Set<Clazz> getReferences() {
+        return references
+    }
+
+    Set<Clazz> getTransitiveDependencies() {
+        final Set<Clazz> all = new HashSet<Clazz>();
+        findTransitiveDependencies(all);
+        return all;
+    }
+
+    void findTransitiveDependencies( final Set<? super Clazz> pAll ) {
+        for (Clazz clazz : dependencies) {
+            if (!pAll.contains(clazz)) {
+                pAll.add(clazz)
+                clazz.findTransitiveDependencies(pAll)
+            }
+        }
+    }
+
+    boolean equals( final Object pO ) {
+        if (pO.getClass() != Clazz.class) {
+            return false
+        }
+        Clazz c = (Clazz) pO
+        name.equals(c.name)
+    }
+
+    int hashCode() {
+        name.hashCode()
+    }
+
+    int compareTo( final Clazz pO ) {
+        name.compareTo(((Clazz) pO).name)
+    }
+
+    String toString() {
+        name
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/Clazzpath.groovy

@@ -0,0 +1,228 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.objectweb.asm.ClassReader
+
+import java.util.jar.JarEntry
+import java.util.jar.JarInputStream
+import java.nio.file.Files
+import java.nio.file.Path
+import java.util.stream.Stream
+import java.util.stream.StreamSupport
+
+class Clazzpath {
+
+    private final Set<ClazzpathUnit> units
+
+    private final Map<String, Clazz> missing
+
+    private final Map<String, Clazz> clazzes
+
+    Clazzpath() {
+        units = new HashSet<ClazzpathUnit>()
+        missing = new HashMap<String, Clazz>()
+        clazzes = new HashMap<String, Clazz>()
+    }
+
+    boolean removeClazzpathUnit(ClazzpathUnit unit) {
+        Set<Clazz> unitClazzes = unit.getClazzes()
+        for (Clazz clazz : unitClazzes) {
+            clazz.removeClazzpathUnit(unit)
+            if (clazz.getClazzpathUnits().size() == 0) {
+                clazzes.remove(clazz.toString())
+            }
+        }
+        units.remove(unit)
+    }
+
+    ClazzpathUnit addClazzpathUnit(File file) throws IOException {
+        addClazzpathUnit(file.toPath())
+    }
+
+    ClazzpathUnit addClazzpathUnit(File file, String s) throws IOException {
+        addClazzpathUnit(file.toPath(), s)
+    }
+
+    ClazzpathUnit addClazzpathUnit(Path path) throws IOException {
+        addClazzpathUnit(path, path.toString())
+    }
+
+    ClazzpathUnit addClazzpathUnit(Path path1, String s) throws IOException {
+        Path path = path1.toAbsolutePath()
+        if (Files.isRegularFile(path)) {
+            return addClazzpathUnit(Files.newInputStream(path), s)
+        } else if (Files.isDirectory(path)) {
+            String prefix = Utils.separatorsToUnix(Utils.normalize(path.toString() + File.separatorChar))
+            List<Resource> list = []
+            path.traverse { p ->
+                if (Files.isRegularFile(p) && isValidResourceName(p.getFileName().toString())) {
+                    list << new Resource(p.toString().substring(prefix.length())) {
+                        @Override
+                        InputStream getInputStream() throws IOException {
+                            Files.newInputStream(p)
+                        }
+                    }
+                }
+            }
+            return addClazzpathUnit(list, s, true)
+        }
+        throw new IllegalArgumentException("neither file nor directory")
+    }
+
+    ClazzpathUnit addClazzpathUnit(InputStream inputStream, String s) throws IOException {
+        final JarInputStream jarInputStream = new JarInputStream(inputStream)
+        try {
+            Stream stream = toEntryStream(jarInputStream).map { e -> e.getName() }
+                    .filter { name -> isValidResourceName(name) }
+                    .map { name -> new Resource(name) {
+                               @Override
+                               InputStream getInputStream() throws IOException {
+                                   jarInputStream
+                               }
+                           }
+                    }
+            addClazzpathUnit(stream.&iterator, s, false)
+        } finally {
+            jarInputStream.close()
+        }
+    }
+
+    ClazzpathUnit addClazzpathUnit(Iterable<Resource> resources, String s, boolean shouldCloseResourceStream)
+            throws IOException {
+        Map<String, Clazz> unitClazzes = new HashMap<String, Clazz>()
+        Map<String, Clazz> unitDependencies = new HashMap<String, Clazz>()
+        ClazzpathUnit unit = new ClazzpathUnit(s, unitClazzes, unitDependencies)
+        for (Resource resource : resources) {
+            String clazzName = resource.name
+            Clazz clazz = getClazz(clazzName)
+            if (clazz == null) {
+                clazz = missing.get(clazzName)
+                if (clazz != null) {
+                    // already marked missing
+                    clazz = missing.remove(clazzName)
+                } else {
+                    clazz = new Clazz(clazzName)
+                }
+            }
+            clazz.addClazzpathUnit(unit)
+            clazzes.put(clazzName, clazz)
+            unitClazzes.put(clazzName, clazz)
+            DependenciesClassRemapper dependenciesClassAdapter = new DependenciesClassRemapper()
+            InputStream inputStream = resource.getInputStream()
+            try {
+                new ClassReader(inputStream.readAllBytes()).accept(dependenciesClassAdapter, ClassReader.EXPAND_FRAMES | ClassReader.SKIP_DEBUG)
+            } finally {
+                if (shouldCloseResourceStream) {
+                    inputStream.close()
+                }
+            }
+            Set<String> depNames = dependenciesClassAdapter.getDependencies()
+            for (String depName : depNames) {
+                Clazz dep = getClazz(depName)
+                if (dep == null) {
+                    // there is no such clazz yet
+                    dep = missing.get(depName)
+                }
+                if (dep == null) {
+                    // it is also not recorded to be missing
+                    dep = new Clazz(depName)
+                    dep.addClazzpathUnit(unit)
+                    missing.put(depName, dep)
+                }
+                if (dep != clazz) {
+                    unitDependencies.put(depName, dep)
+                    clazz.addDependency(dep)
+                }
+            }
+        }
+        units.add(unit)
+        unit
+    }
+
+    Set<Clazz> getClazzes() {
+        new HashSet<Clazz>(clazzes.values())
+    }
+
+    Set<Clazz> getClashedClazzes() {
+        Set<Clazz> all = new HashSet<Clazz>()
+        for (Clazz clazz : clazzes.values()) {
+            if (clazz.getClazzpathUnits().size() > 1) {
+                all.add(clazz)
+            }
+        }
+        all
+    }
+
+    Set<Clazz> getMissingClazzes() {
+        new HashSet<Clazz>(missing.values())
+    }
+
+    Clazz getClazz(String clazzName) {
+        (Clazz) clazzes.get(clazzName)
+    }
+
+    ClazzpathUnit[] getUnits() {
+        units.toArray(new ClazzpathUnit[units.size()])
+    }
+
+    private Stream<JarEntry> toEntryStream(JarInputStream jarInputStream) {
+        StreamSupport.stream(Spliterators.spliteratorUnknownSize(new JarEntryIterator(jarInputStream),
+                Spliterator.IMMUTABLE), false)
+    }
+
+    private class JarEntryIterator implements Iterator<JarEntry> {
+
+        JarInputStream jarInputStream
+        JarEntry entry
+
+        JarEntryIterator(JarInputStream jarInputStream) {
+            this.jarInputStream = jarInputStream
+            this.entry = null
+        }
+
+        @Override
+        boolean hasNext() {
+            try {
+                if (entry == null) {
+                    entry = jarInputStream.getNextJarEntry()
+                }
+                return entry != null
+            } catch (IOException e) {
+                throw new RuntimeException(e)
+            }
+        }
+
+        @Override
+        JarEntry next() {
+            try {
+                JarEntry result = entry != null ? entry : jarInputStream.getNextJarEntry()
+                entry = null
+                return result
+            } catch (IOException e) {
+                throw new RuntimeException(e)
+            }
+        }
+    }
+
+    private static abstract class Resource {
+
+        private static int ext = '.class'.length()
+
+        String name
+
+        Resource(String name) {
+            // foo/bar/Foo.class -> // foo.bar.Foo
+            this.name = name.substring(0, name.length() - ext).replace('/', '.')
+        }
+
+        abstract InputStream getInputStream() throws IOException
+
+        @Override
+        String toString() {
+            name
+        }
+    }
+
+    private static boolean isValidResourceName(String name) {
+        (name != null) && name.endsWith('.class') && !name.contains('-')
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/ClazzpathUnit.groovy

@@ -0,0 +1,40 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+class ClazzpathUnit {
+
+    private final String s
+
+    private final Map<String, Clazz> clazzes
+
+    private final Map<String, Clazz> dependencies
+
+    ClazzpathUnit(String s, Map<String, Clazz> clazzes, Map<String, Clazz> dependencies) {
+        this.s = s
+        this.clazzes = clazzes
+        this.dependencies = dependencies
+    }
+
+    Set<Clazz> getClazzes() {
+        new HashSet<Clazz>(clazzes.values())
+    }
+
+    Clazz getClazz( final String pClazzName ) {
+        clazzes.get(pClazzName)
+    }
+
+    Set<Clazz> getDependencies() {
+        new HashSet<Clazz>(dependencies.values())
+    }
+
+    Set<Clazz> getTransitiveDependencies() {
+        Set<Clazz> all = new HashSet<Clazz>()
+        for (Clazz clazz : clazzes.values()) {
+            clazz.findTransitiveDependencies(all)
+        }
+        all
+    }
+
+    String toString() {
+        s
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/DefaultDependencyFilter.groovy

@@ -0,0 +1,126 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.gradle.api.Project
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.artifacts.Dependency
+import org.gradle.api.artifacts.ResolvedDependency
+import org.gradle.api.file.FileCollection
+import org.gradle.api.specs.Spec
+import org.gradle.api.specs.Specs
+
+class DefaultDependencyFilter implements DependencyFilter {
+
+    private final Project project
+
+    private final List<Spec<? super ResolvedDependency>> includeSpecs = []
+
+    private final List<Spec<? super ResolvedDependency>> excludeSpecs = []
+
+    DefaultDependencyFilter(Project project) {
+        this.project = project
+    }
+
+    FileCollection resolve(Configuration configuration) {
+        Set<ResolvedDependency> includedDeps = []
+        Set<ResolvedDependency> excludedDeps = []
+        resolve(configuration.resolvedConfiguration.firstLevelModuleDependencies, includedDeps, excludedDeps)
+        project.files(configuration.files) - project.files(excludedDeps.collect {
+            it.moduleArtifacts*.file
+        }.flatten())
+    }
+
+    FileCollection resolve(Collection<Configuration> configurations) {
+        configurations.collect {
+            resolve(it)
+        }.sum() as FileCollection ?: project.files()
+    }
+
+    /**
+     * Exclude dependencies that match the provided spec.
+     *
+     * @param spec
+     * @return
+     */
+    DependencyFilter exclude(Spec<? super ResolvedDependency> spec) {
+        excludeSpecs << spec
+        this
+    }
+
+    /**
+     * Include dependencies that match the provided spec.
+     *
+     * @param spec
+     * @return
+     */
+    DependencyFilter include(Spec<? super ResolvedDependency> spec) {
+        includeSpecs << spec
+        return this
+    }
+
+    /**
+     * Create a spec that matches the provided project notation on group, name, and version
+     * @param notation
+     * @return
+     */
+    Spec<? super ResolvedDependency> project(Map<String, ?> notation) {
+        dependency(project.dependencies.project(notation))
+    }
+
+    /**
+     * Create a spec that matches the default configuration for the provided project path on group, name, and version
+     *
+     * @param notation
+     * @return
+     */
+    Spec<? super ResolvedDependency> project(String notation) {
+        dependency(project.dependencies.project(path: notation, configuration: 'default'))
+    }
+
+    /**
+     * Create a spec that matches dependencies using the provided notation on group, name, and version
+     * @param notation
+     * @return
+     */
+    Spec<? super ResolvedDependency> dependency(Object notation) {
+        dependency(project.dependencies.create(notation))
+    }
+
+    /**
+     * Create a spec that matches the provided dependency on group, name, and version
+     * @param dependency
+     * @return
+     */
+    Spec<? super ResolvedDependency> dependency(Dependency dependency) {
+        this.dependency({ ResolvedDependency it ->
+            (!dependency.group || it.moduleGroup.matches(dependency.group)) &&
+                    (!dependency.name || it.moduleName.matches(dependency.name)) &&
+                    (!dependency.version || it.moduleVersion.matches(dependency.version))
+        })
+    }
+
+    /**
+     * Create a spec that matches the provided closure
+     * @param spec
+     * @return
+     */
+    Spec<? super ResolvedDependency> dependency(Closure spec) {
+        return Specs.<ResolvedDependency>convertClosureToSpec(spec)
+    }
+
+
+    protected void resolve(Set<ResolvedDependency> dependencies,
+                           Set<ResolvedDependency> includedDependencies,
+                           Set<ResolvedDependency> excludedDependencies) {
+        dependencies.each {
+            if (isIncluded(it) ? includedDependencies.add(it) : excludedDependencies.add(it)) {
+                resolve(it.children, includedDependencies, excludedDependencies)
+            }
+        }
+    }
+
+    protected boolean isIncluded(ResolvedDependency dependency) {
+        boolean include = includeSpecs.empty || includeSpecs.any { it.isSatisfiedBy(dependency) }
+        boolean exclude = !excludeSpecs.empty && excludeSpecs.any { it.isSatisfiedBy(dependency) }
+        return include && !exclude
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/DefaultZipCompressor.groovy

@@ -0,0 +1,28 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.gradle.api.UncheckedIOException
+import org.xbib.gradle.plugin.shadow.zip.Zip64Mode
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+class DefaultZipCompressor implements ZipCompressor {
+
+    private final int entryCompressionMethod
+    private final Zip64Mode zip64Mode
+
+     DefaultZipCompressor(boolean allowZip64Mode, int entryCompressionMethod) {
+        this.entryCompressionMethod = entryCompressionMethod
+        zip64Mode = allowZip64Mode ? Zip64Mode.AsNeeded : Zip64Mode.Never
+    }
+
+    @Override
+    ZipOutputStream createArchiveOutputStream(File destination) {
+        try {
+            ZipOutputStream zipOutputStream = new ZipOutputStream(destination)
+            zipOutputStream.setUseZip64(zip64Mode)
+            zipOutputStream.setMethod(entryCompressionMethod)
+            return zipOutputStream
+        } catch (Exception e) {
+            throw new UncheckedIOException("unable to create ZIP output stream for file " + destination, e)
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/DependenciesClassRemapper.groovy

@@ -0,0 +1,144 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.objectweb.asm.AnnotationVisitor
+import org.objectweb.asm.ClassVisitor
+import org.objectweb.asm.FieldVisitor
+import org.objectweb.asm.Label
+import org.objectweb.asm.MethodVisitor
+import org.objectweb.asm.Opcodes
+import org.objectweb.asm.TypePath
+import org.objectweb.asm.commons.ClassRemapper
+import org.objectweb.asm.commons.Remapper
+
+class DependenciesClassRemapper extends ClassRemapper {
+
+    private static final AnnotationVisitor annotationVisitor = new MyAnnotationVisitor()
+
+    private static final MethodVisitor methodVisitor = new MyMethodVisitor()
+
+    private static final FieldVisitor fieldVisitor = new MyFieldVisitor()
+
+    private static final ClassVisitor classVisitor = new MyClassVisitor()
+
+    DependenciesClassRemapper() {
+        super(classVisitor, new CollectingRemapper())
+    }
+
+    Set<String> getDependencies() {
+        return ((CollectingRemapper) super.remapper).classes
+    }
+
+    private static class CollectingRemapper extends Remapper {
+        Set<String> classes = new HashSet<String>()
+
+        @Override
+        String map(String className) {
+            classes.add(className.replace('/', '.'))
+            className
+        }
+    }
+
+    private static class MyAnnotationVisitor extends AnnotationVisitor {
+
+        MyAnnotationVisitor() {
+            super(Opcodes.ASM7)
+        }
+
+        @Override
+        AnnotationVisitor visitAnnotation(String name, String desc) {
+            this
+        }
+
+        @Override
+        AnnotationVisitor visitArray(String name) {
+            this
+        }
+    }
+
+    private static class MyMethodVisitor extends MethodVisitor {
+
+        MyMethodVisitor() {
+            super(Opcodes.ASM7)
+        }
+
+        @Override
+        AnnotationVisitor visitAnnotationDefault() {
+            annotationVisitor
+        }
+
+        @Override
+        AnnotationVisitor visitAnnotation(String desc, boolean visible) {
+            annotationVisitor
+        }
+
+        @Override
+        AnnotationVisitor visitParameterAnnotation(int parameter, String desc, boolean visible) {
+            annotationVisitor
+        }
+
+        @Override
+        AnnotationVisitor visitInsnAnnotation(int typeRef, TypePath typePath, String descriptor, boolean visible) {
+            annotationVisitor
+        }
+
+        @Override
+        AnnotationVisitor visitLocalVariableAnnotation(int typeRef, TypePath typePath, Label[] start,
+                                                       Label[] end, int[] index, String descriptor,
+                                                       boolean visible) {
+            annotationVisitor
+        }
+
+        @Override
+        AnnotationVisitor visitTryCatchAnnotation(int typeRef, TypePath typePath, String descriptor, boolean visible ) {
+            annotationVisitor
+        }
+
+        @Override
+        AnnotationVisitor visitTypeAnnotation(int typeRef, TypePath typePath, String descriptor, boolean visible ) {
+            annotationVisitor
+        }
+    }
+
+    private static class MyFieldVisitor extends FieldVisitor {
+
+        MyFieldVisitor() {
+            super(Opcodes.ASM7)
+        }
+
+        @Override
+        AnnotationVisitor visitAnnotation(String desc, boolean visible) {
+            annotationVisitor
+        }
+        @Override
+        AnnotationVisitor visitTypeAnnotation(int typeRef, TypePath typePath, String descriptor, boolean visible) {
+            annotationVisitor
+        }
+    }
+
+    private static class MyClassVisitor extends ClassVisitor {
+
+        MyClassVisitor() {
+            super(Opcodes.ASM7);
+        }
+
+        @Override
+        AnnotationVisitor visitAnnotation(String desc, boolean visible) {
+            annotationVisitor
+        }
+
+        @Override
+        FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
+            fieldVisitor
+        }
+
+        @Override
+        MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
+            methodVisitor
+        }
+
+        @Override
+        AnnotationVisitor visitTypeAnnotation(int typeRef, TypePath typePath, String descriptor, boolean visible ) {
+            annotationVisitor
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/DependencyFilter.groovy

@@ -0,0 +1,76 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.artifacts.Dependency
+import org.gradle.api.artifacts.ResolvedDependency
+import org.gradle.api.file.FileCollection
+import org.gradle.api.specs.Spec
+
+interface DependencyFilter {
+
+    /**
+     * Resolve a Configuration against the include/exclude rules in the filter
+     * @param configuration
+     * @return
+     */
+    FileCollection resolve(Configuration configuration)
+
+    /**
+     * Resolve all Configurations against the include/exclude ruels in the filter and combine the results
+     * @param configurations
+     * @return
+     */
+    FileCollection resolve(Collection<Configuration> configurations)
+
+    /**
+     * Exclude dependencies that match the provided spec.
+     *
+     * @param spec
+     * @return
+     */
+    DependencyFilter exclude(Spec<? super ResolvedDependency> spec)
+
+    /**
+     * Include dependencies that match the provided spec.
+     *
+     * @param spec
+     * @return
+     */
+    DependencyFilter include(Spec<? super ResolvedDependency> spec)
+
+    /**
+     * Create a spec that matches the provided project notation on group, name, and version
+     * @param notation
+     * @return
+     */
+    Spec<? super ResolvedDependency> project(Map<String, ?> notation)
+
+    /**
+     * Create a spec that matches the default configuration for the provided project path on group, name, and version
+     *
+     * @param notation
+     * @return
+     */
+    Spec<? super ResolvedDependency> project(String notation)
+
+    /**
+     * Create a spec that matches dependencies using the provided notation on group, name, and version
+     * @param notation
+     * @return
+     */
+    Spec<? super ResolvedDependency> dependency(Object notation)
+
+    /**
+     * Create a spec that matches the provided dependency on group, name, and version
+     * @param dependency
+     * @return
+     */
+    Spec<? super ResolvedDependency> dependency(Dependency dependency)
+
+    /**
+     * Create a spec that matches the provided closure
+     * @param spec
+     * @return
+     */
+    Spec<? super ResolvedDependency> dependency(Closure spec)
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/DependencyUtils.groovy

@@ -0,0 +1,44 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.objectweb.asm.ClassReader
+
+import java.util.jar.JarEntry
+import java.util.jar.JarInputStream
+
+class DependencyUtils {
+
+    static Collection<String> getDependenciesOfJar(InputStream is ) throws IOException {
+        Set<String> dependencies = []
+        JarInputStream inputStream = new JarInputStream(is)
+        inputStream.withCloseable {
+            while (true) {
+                JarEntry entry = inputStream.getNextJarEntry()
+                if (entry == null) {
+                    break
+                }
+                if (entry.isDirectory()) {
+                    inputStream.readAllBytes()
+                    continue
+                }
+                if (entry.getName().endsWith('.class')) {
+                    DependenciesClassRemapper dependenciesClassAdapter = new DependenciesClassRemapper()
+                    new ClassReader(inputStream.readAllBytes()).accept(dependenciesClassAdapter, 0)
+                    dependencies.addAll(dependenciesClassAdapter.getDependencies())
+                } else {
+                    inputStream.readAllBytes()
+                }
+            }
+        }
+        dependencies
+    }
+
+    static Collection<String> getDependenciesOfClass(InputStream is) throws IOException {
+        final DependenciesClassRemapper dependenciesClassAdapter = new DependenciesClassRemapper()
+        new ClassReader(is.readAllBytes()).accept(dependenciesClassAdapter, ClassReader.EXPAND_FRAMES)
+        dependenciesClassAdapter.getDependencies()
+    }
+
+    static Collection<String> getDependenciesOfClass(Class<?> clazz) throws IOException {
+        getDependenciesOfClass(clazz.getResourceAsStream('/' + clazz.getName().replace('.', '/') + '.class'))
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/StringBuilderWriter.groovy

@@ -0,0 +1,142 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+/**
+ * {@link Writer} implementation that outputs to a {@link StringBuilder}.
+ * <p>
+ * <strong>NOTE:</strong> This implementation, as an alternative to
+ * <code>java.io.StringWriter</code>, provides an <i>un-synchronized</i>
+ * (i.e. for use in a single thread) implementation for better performance.
+ * For safe usage with multiple {@link Thread}s then
+ * <code>java.io.StringWriter</code> should be used.
+ */
+class StringBuilderWriter extends Writer {
+
+    private final StringBuilder builder
+
+    /**
+     * Constructs a new {@link StringBuilder} instance with default capacity.
+     */
+    StringBuilderWriter() {
+        this.builder = new StringBuilder()
+    }
+
+    /**
+     * Constructs a new {@link StringBuilder} instance with the specified capacity.
+     *
+     * @param capacity The initial capacity of the underlying {@link StringBuilder}
+     */
+    StringBuilderWriter(int capacity) {
+        this.builder = new StringBuilder(capacity)
+    }
+
+    /**
+     * Constructs a new instance with the specified {@link StringBuilder}.
+     *
+     * <p>If {@code builder} is null a new instance with default capacity will be created.</p>
+     *
+     * @param builder The String builder. May be null.
+     */
+    StringBuilderWriter(StringBuilder builder) {
+        this.builder = builder != null ? builder : new StringBuilder()
+    }
+
+    /**
+     * Appends a single character to this Writer.
+     *
+     * @param value The character to append
+     * @return This writer instance
+     */
+    @Override
+    Writer append(char value) {
+        builder.append(value)
+        this
+    }
+
+    /**
+     * Appends a character sequence to this Writer.
+     *
+     * @param value The character to append
+     * @return This writer instance
+     */
+    @Override
+    Writer append(CharSequence value) {
+        builder.append(value)
+        this
+    }
+
+    /**
+     * Appends a portion of a character sequence to the {@link StringBuilder}.
+     *
+     * @param value The character to append
+     * @param start The index of the first character
+     * @param end The index of the last character + 1
+     * @return This writer instance
+     */
+    @Override
+    Writer append(CharSequence value, int start, int end) {
+        builder.append(value, start, end)
+        this
+    }
+
+    /**
+     * Closing this writer has no effect.
+     */
+    @Override
+    void close() {
+        // no-op
+    }
+
+    /**
+     * Flushing this writer has no effect.
+     */
+    @Override
+    void flush() {
+        // no-op
+    }
+
+
+    /**
+     * Writes a String to the {@link StringBuilder}.
+     *
+     * @param value The value to write
+     */
+    @Override
+    void write(String value) {
+        if (value != null) {
+            builder.append(value)
+        }
+    }
+
+    /**
+     * Writes a portion of a character array to the {@link StringBuilder}.
+     *
+     * @param value The value to write
+     * @param offset The index of the first character
+     * @param length The number of characters to write
+     */
+    @Override
+    void write(char[] value, int offset, int length) {
+        if (value != null) {
+            builder.append(value, offset, length)
+        }
+    }
+
+    /**
+     * Returns the underlying builder.
+     *
+     * @return The underlying builder
+     */
+    StringBuilder getBuilder() {
+        builder
+    }
+
+    /**
+     * Returns {@link StringBuilder#toString()}.
+     *
+     * @return The contents of the String builder.
+     */
+    @Override
+    String toString() {
+        builder.toString()
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/UnusedTracker.groovy

@@ -0,0 +1,44 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.gradle.api.Project
+import org.gradle.api.file.FileCollection
+import org.gradle.api.tasks.SourceSet
+
+class UnusedTracker {
+
+    private final FileCollection toMinimize
+
+    private final List<ClazzpathUnit> projectUnits
+
+    private final Clazzpath clazzPath
+
+    private UnusedTracker(List<File> classDirs, FileCollection toMinimize) {
+        this.toMinimize = toMinimize
+        this.clazzPath = new Clazzpath()
+        this.projectUnits = classDirs.collect { clazzPath.addClazzpathUnit(it) }
+    }
+
+    Set<String> findUnused() {
+        Set<Clazz> unused = clazzPath.clazzes
+        for (cpu in projectUnits) {
+            unused.removeAll(cpu.clazzes)
+            unused.removeAll(cpu.transitiveDependencies)
+        }
+        unused.collect { it.name }.toSet()
+    }
+
+    void addDependency(File jarOrDir) {
+        if (toMinimize.contains(jarOrDir)) {
+            clazzPath.addClazzpathUnit(jarOrDir)
+        }
+    }
+
+    static UnusedTracker forProject(Project project, FileCollection toMinimize) {
+        final List<File> classDirs = new ArrayList<>()
+        for (SourceSet sourceSet in project.sourceSets) {
+            Iterable<File> classesDirs = sourceSet.output.classesDirs
+            classDirs.addAll(classesDirs.findAll { it.isDirectory() })
+        }
+        return new UnusedTracker(classDirs, toMinimize)
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/Utils.groovy

@@ -0,0 +1,629 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import java.nio.charset.Charset
+import java.nio.file.Files
+import java.nio.file.StandardOpenOption
+
+class Utils {
+
+    private static final String EMPTY_STRING = ""
+
+    private static final Character EXTENSION_SEPARATOR = '.' as Character
+
+    private static final Character UNIX_SEPARATOR = '/' as Character
+
+    private static final Character WINDOWS_SEPARATOR = '\\' as Character
+
+    private static final Character SYSTEM_SEPARATOR = File.separatorChar as Character
+
+    private static final int NOT_FOUND = -1
+
+    private static final char OTHER_SEPARATOR
+
+    static {
+        if (SYSTEM_SEPARATOR == WINDOWS_SEPARATOR) {
+            OTHER_SEPARATOR = UNIX_SEPARATOR
+        } else {
+            OTHER_SEPARATOR = WINDOWS_SEPARATOR
+        }
+    }
+
+    static String separatorsToUnix(String path) {
+        if (path == null || path.indexOf(WINDOWS_SEPARATOR as String) == NOT_FOUND) {
+            return path
+        }
+        path.replace(WINDOWS_SEPARATOR, UNIX_SEPARATOR)
+    }
+
+    static String getExtension(String fileName) throws IllegalArgumentException {
+        if (fileName == null) {
+            return null
+        }
+        int index = indexOfExtension(fileName)
+        if (index == NOT_FOUND) {
+            return EMPTY_STRING
+        }
+        return fileName.substring(index + 1)
+    }
+
+    static int indexOfExtension(String fileName) throws IllegalArgumentException {
+        if (fileName == null) {
+            return NOT_FOUND
+        }
+        if (SYSTEM_SEPARATOR == WINDOWS_SEPARATOR) {
+            int offset = fileName.indexOf(':' as String, getAdsCriticalOffset(fileName))
+            if (offset != -1) {
+                throw new IllegalArgumentException("NTFS ADS separator (':') in file name is forbidden.")
+            }
+        }
+        int extensionPos = fileName.lastIndexOf(EXTENSION_SEPARATOR as String)
+        int lastSeparator = indexOfLastSeparator(fileName)
+        lastSeparator > extensionPos ? NOT_FOUND : extensionPos
+    }
+
+    static int getAdsCriticalOffset(String fileName) {
+        int offset1 = fileName.lastIndexOf(SYSTEM_SEPARATOR as String)
+        int offset2 = fileName.lastIndexOf(OTHER_SEPARATOR as String)
+        if (offset1 == -1) {
+            if (offset2 == -1) {
+                return 0
+            }
+            return offset2 + 1
+        }
+        if (offset2 == -1) {
+            return offset1 + 1
+        }
+        return Math.max(offset1, offset2) + 1
+    }
+
+    static int indexOfLastSeparator(String fileName) {
+        if (fileName == null) {
+            return NOT_FOUND
+        }
+        int lastUnixPos = fileName.lastIndexOf(UNIX_SEPARATOR as String)
+        int lastWindowsPos = fileName.lastIndexOf(WINDOWS_SEPARATOR as String)
+        return Math.max(lastUnixPos, lastWindowsPos)
+    }
+
+    static String normalize(String fileName) {
+        doNormalize(fileName, SYSTEM_SEPARATOR, true)
+    }
+
+    private static String doNormalize(String fileName, char separator, boolean keepSeparator) {
+        if (fileName == null) {
+            return null
+        }
+        failIfNullBytePresent(fileName)
+        int size = fileName.length()
+        if (size == 0) {
+            return fileName
+        }
+        int prefix = getPrefixLength(fileName)
+        if (prefix < 0) {
+            return null
+        }
+        char[] array = new char[size + 2]
+        fileName.getChars(0, fileName.length(), array, 0)
+        char otherSeparator = separator == SYSTEM_SEPARATOR ? OTHER_SEPARATOR : SYSTEM_SEPARATOR
+        for (int i = 0; i < array.length; i++) {
+            if (array[i] == otherSeparator) {
+                array[i] = separator
+            }
+        }
+        boolean lastIsDirectory = true
+        if (array[size - 1] != separator) {
+            array[size++] = separator
+            lastIsDirectory = false
+        }
+        for (int i = prefix + 1; i < size; i++) {
+            if (array[i] == separator && array[i - 1] == separator) {
+                System.arraycopy(array, i, array, i - 1, size - i)
+                size--
+                i--
+            }
+        }
+        char dot = '.' as char
+        for (int i = prefix + 1; i < size; i++) {
+            if (array[i] == separator && array[i - 1] == dot &&
+                    (i == prefix + 1 || array[i - 2] == separator)) {
+                if (i == size - 1) {
+                    lastIsDirectory = true
+                }
+                System.arraycopy(array, i + 1, array, i - 1, size - i)
+                size -=2
+                i--
+            }
+        }
+        outer:
+        for (int i = prefix + 2; i < size; i++) {
+            if (array[i] == separator && array[i - 1] == dot && array[i - 2] == dot &&
+                    (i == prefix + 2 || array[i - 3] == separator)) {
+                if (i == prefix + 2) {
+                    return null
+                }
+                if (i == size - 1) {
+                    lastIsDirectory = true
+                }
+                int j
+                for (j = i - 4 ; j >= prefix; j--) {
+                    if (array[j] == separator) {
+                        System.arraycopy(array, i + 1, array, j + 1, size - i)
+                        size -= i - j
+                        i = j + 1
+                        continue outer
+                    }
+                }
+                System.arraycopy(array, i + 1, array, prefix, size - i)
+                size -= i + 1 - prefix
+                i = prefix + 1
+            }
+        }
+        if (size <= 0) {
+            return EMPTY_STRING
+        }
+        if (size <= prefix) {
+            return new String(array, 0, size)
+        }
+        if (lastIsDirectory && keepSeparator) {
+            return new String(array, 0, size)
+        }
+        new String(array, 0, size - 1)
+    }
+
+    static int getPrefixLength(String fileName) {
+        if (fileName == null) {
+            return NOT_FOUND
+        }
+        int len = fileName.length()
+        if (len == 0) {
+            return 0
+        }
+        char ch0 = fileName.charAt(0) as char
+        if (ch0 == ':' as char) {
+            return NOT_FOUND
+        }
+        if (len == 1) {
+            if (ch0 == '~' as char) {
+                return 2
+            }
+            return isSeparator(ch0) ? 1 : 0
+        }
+        if (ch0 == '~' as char) {
+            int posUnix = fileName.indexOf(UNIX_SEPARATOR as String, 1)
+            int posWin = fileName.indexOf(WINDOWS_SEPARATOR as String, 1)
+            if (posUnix == NOT_FOUND && posWin == NOT_FOUND) {
+                return len + 1
+            }
+            posUnix = posUnix == NOT_FOUND ? posWin : posUnix
+            posWin = posWin == NOT_FOUND ? posUnix : posWin
+            return Math.min(posUnix, posWin) + 1
+        }
+        char ch1 = fileName.charAt(1) as char
+        if (ch1 == ':' as char) {
+            ch0 = Character.toUpperCase(ch0)
+            if (ch0 >= ('A' as char) && ch0 <= ('Z' as char)) {
+                if (len == 2 || !isSeparator(fileName.charAt(2))) {
+                    return 2
+                }
+                return 3
+            } else if (ch0 == UNIX_SEPARATOR) {
+                return 1
+            }
+            return NOT_FOUND
+
+        } else if (isSeparator(ch0) && isSeparator(ch1)) {
+            int posUnix = fileName.indexOf(UNIX_SEPARATOR as String, 2)
+            int posWin = fileName.indexOf(WINDOWS_SEPARATOR as String, 2)
+            if (posUnix == NOT_FOUND && posWin == NOT_FOUND || posUnix == 2 || posWin == 2) {
+                return NOT_FOUND
+            }
+            posUnix = posUnix == NOT_FOUND ? posWin : posUnix
+            posWin = posWin == NOT_FOUND ? posUnix : posWin
+            int pos = Math.min(posUnix, posWin) + 1
+            String hostnamePart = fileName.substring(2, pos - 1)
+            return isValidHostName(hostnamePart) ? pos : NOT_FOUND
+        } else {
+            return isSeparator(ch0) ? 1 : 0
+        }
+    }
+
+    static boolean isSeparator(char ch) {
+        return ch == UNIX_SEPARATOR || ch == WINDOWS_SEPARATOR
+    }
+
+    private static void failIfNullBytePresent(String path) {
+        int len = path.length()
+        for (int i = 0; i < len; i++) {
+            if (path.charAt(i) == 0 as char) {
+                throw new IllegalArgumentException("Null byte present in file/path name. There are no " +
+                        "known legitimate use cases for such data, but several injection attacks may use it")
+            }
+        }
+    }
+
+    static String removeExtension(String fileName) {
+        if (fileName == null) {
+            return null
+        }
+        failIfNullBytePresent(fileName)
+        int index = indexOfExtension(fileName)
+        if (index == NOT_FOUND) {
+            return fileName
+        }
+        fileName.substring(0, index)
+    }
+
+    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4
+
+    static long copyLarge(Reader input, Writer output) throws IOException {
+        return copyLarge(input, output, new char[DEFAULT_BUFFER_SIZE])
+    }
+
+    static long copyLarge(Reader input, Writer output, final char[] buffer) throws IOException {
+        long count = 0
+        int n
+        while (-1 != (n = input.read(buffer))) {
+            output.write(buffer, 0, n)
+            count += n
+        }
+        count
+    }
+
+    static long copyLarge(InputStream input, OutputStream output) throws IOException {
+        return copy(input, output, DEFAULT_BUFFER_SIZE);
+    }
+
+    static long copy(InputStream input, OutputStream output, int bufferSize) throws IOException {
+        return copyLarge(input, output, new byte[bufferSize])
+    }
+
+    static long copyLarge(InputStream input, OutputStream output, byte[] buffer) throws IOException {
+        long count = 0
+        int n
+        while (-1 != (n = input.read(buffer))) {
+            output.write(buffer, 0, n)
+            count += n
+        }
+        return count
+    }
+
+    static void writeStringToFile(File file, String data, Charset encoding) throws IOException {
+        writeStringToFile(file, data, encoding, false)
+    }
+
+    static void writeStringToFile(File file, String data, Charset encoding, boolean append) throws IOException {
+        OutputStream out = append ?
+                Files.newOutputStream(file.toPath(), StandardOpenOption.APPEND) : Files.newOutputStream(file.toPath())
+        out.withCloseable { outputStream ->
+            write(data, outputStream, encoding)
+        }
+    }
+
+    static void write(String data, OutputStream output, Charset encoding) throws IOException {
+        if (data != null) {
+            output.write(data.getBytes(encoding))
+        }
+    }
+
+    static String readFileToString(File file, Charset encoding) throws IOException {
+        InputStream inputStream = Files.newInputStream(file.toPath())
+        inputStream.withCloseable { is ->
+            return toString(is, encoding)
+        }
+    }
+
+    static String toString(InputStream input, Charset encoding) throws IOException {
+        StringBuilderWriter sw = new StringBuilderWriter()
+        sw.withCloseable { writer ->
+            copyLarge(new InputStreamReader(input, encoding), writer)
+            return sw.toString()
+        }
+    }
+
+    static byte[] readFileToByteArray(File file) throws IOException {
+        InputStream inputStream = Files.newInputStream(file.toPath())
+        inputStream.withCloseable { is ->
+            long fileLength = file.length()
+            return fileLength > 0 ? toByteArray(is, fileLength) : toByteArray(is)
+        }
+    }
+
+    static byte[] toByteArray(InputStream input, long size) throws IOException {
+        if (size > Integer.MAX_VALUE) {
+            throw new IllegalArgumentException("Size cannot be greater than Integer max value: " + size)
+        }
+        return toByteArray(input, (int) size)
+    }
+
+    static byte[] toByteArray(InputStream input, int size) throws IOException {
+        if (size < 0) {
+            throw new IllegalArgumentException("Size must be equal or greater than zero: " + size)
+        }
+        if (size == 0) {
+            return new byte[0]
+        }
+        byte[] data = new byte[size]
+        int offset = 0
+        int read = 0
+        while (offset < size && (read = input.read(data, offset, size - offset)) != -1) {
+            offset += read
+        }
+        if (offset != size) {
+            throw new IOException("Unexpected read size. current: " + offset + ", expected: " + size)
+        }
+        data
+    }
+
+    static byte[] toByteArray(InputStream inputStream) throws IOException {
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream()
+        outputStream.withCloseable {
+            copyLarge(inputStream, outputStream)
+            return outputStream.toByteArray()
+        }
+    }
+
+    private static final String PATTERN_HANDLER_PREFIX = "["
+
+    private static final String PATTERN_HANDLER_SUFFIX = "]"
+
+    private static final String REGEX_HANDLER_PREFIX = "%regex" + PATTERN_HANDLER_PREFIX
+
+    private static final String ANT_HANDLER_PREFIX = "%ant" + PATTERN_HANDLER_PREFIX
+
+    static boolean matchPath(String pattern, String str, boolean isCaseSensitive) {
+        matchPath(pattern, str, File.separator, isCaseSensitive)
+    }
+
+    static boolean matchPath(String pattern, String str, String separator, boolean isCaseSensitive) {
+        if (isRegexPrefixedPattern(pattern)) {
+            pattern = pattern.substring(REGEX_HANDLER_PREFIX.length(), pattern.length() - PATTERN_HANDLER_SUFFIX.length())
+            return str.matches(pattern)
+        } else {
+            if (isAntPrefixedPattern(pattern)) {
+                pattern = pattern.substring(ANT_HANDLER_PREFIX.length(),
+                        pattern.length() - PATTERN_HANDLER_SUFFIX.length())
+            }
+
+            return matchAntPathPattern(pattern, str, separator, isCaseSensitive)
+        }
+    }
+
+    static boolean isRegexPrefixedPattern(String pattern) {
+        pattern.length() > (REGEX_HANDLER_PREFIX.length() + PATTERN_HANDLER_SUFFIX.length() + 1) &&
+                pattern.startsWith(REGEX_HANDLER_PREFIX) && pattern.endsWith( PATTERN_HANDLER_SUFFIX)
+    }
+
+    static boolean isAntPrefixedPattern(String pattern) {
+        pattern.length() > (ANT_HANDLER_PREFIX.length() + PATTERN_HANDLER_SUFFIX.length() + 1) &&
+                pattern.startsWith(ANT_HANDLER_PREFIX) && pattern.endsWith(PATTERN_HANDLER_SUFFIX)
+    }
+
+    static boolean matchAntPathPattern(String pattern, String str, String separator, boolean isCaseSensitive) {
+        if (separatorPatternStartSlashMismatch(pattern, str, separator)) {
+            return false
+        }
+        List<String> patDirs = tokenizePathToString(pattern, separator)
+        List<String> strDirs = tokenizePathToString(str, separator)
+        matchAntPathPattern(patDirs, strDirs, isCaseSensitive)
+    }
+
+    static boolean separatorPatternStartSlashMismatch(String pattern, String str, String separator) {
+        str.startsWith(separator) != pattern.startsWith(separator)
+    }
+
+    static List<String> tokenizePathToString(String path, String separator) {
+        List<String> ret = []
+        StringTokenizer st = new StringTokenizer(path, separator)
+        while (st.hasMoreTokens()) {
+            ret.add(st.nextToken())
+        }
+        ret
+    }
+
+    static boolean matchAntPathPattern(List<String> patDirs, List<String> strDirs, boolean isCaseSensitive) {
+        int patIdxStart = 0
+        int patIdxEnd = patDirs.size() - 1
+        int strIdxStart = 0
+        int strIdxEnd = strDirs.size() - 1
+        while (patIdxStart <= patIdxEnd && strIdxStart <= strIdxEnd) {
+            String patDir = patDirs.get(patIdxStart)
+            if (patDir.equals("**")) {
+                break
+            }
+            if (!match(patDir, strDirs.get(strIdxStart), isCaseSensitive)) {
+                return false
+            }
+            patIdxStart++
+            strIdxStart++
+        }
+        if (strIdxStart > strIdxEnd) {
+            for (int i = patIdxStart; i <= patIdxEnd; i++) {
+                if (!patDirs.get(i).equals( "**")) {
+                    return false
+                }
+            }
+            return true
+        } else {
+            if (patIdxStart > patIdxEnd) {
+                return false
+            }
+        }
+        while (patIdxStart <= patIdxEnd && strIdxStart <= strIdxEnd) {
+            String patDir = patDirs.get(patIdxEnd)
+            if (patDir.equals("**")) {
+                break
+            }
+            if (!match(patDir, strDirs.get(strIdxEnd), isCaseSensitive)) {
+                return false
+            }
+            patIdxEnd--
+            strIdxEnd--
+        }
+        if (strIdxStart > strIdxEnd) {
+            for (int i = patIdxStart; i <= patIdxEnd; i++) {
+                if (!patDirs.get(i).equals("**")) {
+                    return false
+                }
+            }
+            return true
+        }
+        while (patIdxStart != patIdxEnd && strIdxStart <= strIdxEnd) {
+            int patIdxTmp = -1
+            for (int i = patIdxStart + 1; i <= patIdxEnd; i++) {
+                if (patDirs.get(i).equals("**")) {
+                    patIdxTmp = i
+                    break
+                }
+            }
+            if (patIdxTmp == patIdxStart + 1) {
+                patIdxStart++
+                continue
+            }
+            int patLength = (patIdxTmp - patIdxStart - 1)
+            int strLength = (strIdxEnd - strIdxStart + 1)
+            int foundIdx = -1;
+            strLoop:
+            for (int i = 0; i <= strLength - patLength; i++) {
+                for (int j = 0; j < patLength; j++) {
+                    String subPat = patDirs.get(patIdxStart + j + 1)
+                    String subStr = strDirs.get(strIdxStart + i + j)
+                    if (!match(subPat, subStr, isCaseSensitive)) {
+                        continue strLoop
+                    }
+                }
+                foundIdx = strIdxStart + i
+                break
+            }
+            if (foundIdx == -1) {
+                return false
+            }
+            patIdxStart = patIdxTmp
+            strIdxStart = foundIdx + patLength
+        }
+        for (int i = patIdxStart; i <= patIdxEnd; i++) {
+            if (!patDirs.get(i).equals("**")) {
+                return false
+            }
+        }
+        return true
+    }
+
+    static boolean match(String pattern, String str, boolean isCaseSensitive) {
+        char[] patArr = pattern.toCharArray()
+        char[] strArr = str.toCharArray()
+        match(patArr, strArr, isCaseSensitive)
+    }
+
+    static boolean match(char[] patArr, char[] strArr, boolean isCaseSensitive) {
+        int patIdxStart = 0
+        int patIdxEnd = patArr.length - 1
+        int strIdxStart = 0
+        int strIdxEnd = strArr.length - 1
+        char ch
+
+        boolean containsStar = false
+        for (char aPatArr : patArr) {
+            if (aPatArr == ('*' as char)) {
+                containsStar = true
+                break
+            }
+        }
+        if (!containsStar) {
+            if (patIdxEnd != strIdxEnd) {
+                return false
+            }
+            for (int i = 0; i <= patIdxEnd; i++) {
+                ch = patArr[i]
+                if ( ch != ('?' as char) && !equals(ch, strArr[i], isCaseSensitive)) {
+                    return false
+                }
+            }
+            return true
+        }
+        if (patIdxEnd == 0) {
+            return true
+        }
+        while ((ch = patArr[patIdxStart]) != ('*' as char) && strIdxStart <= strIdxEnd) {
+            if ( ch != ('?' as char) && !equals( ch, strArr[strIdxStart], isCaseSensitive)) {
+                return false
+            }
+            patIdxStart++
+            strIdxStart++
+        }
+        if (strIdxStart > strIdxEnd) {
+            for (int i = patIdxStart; i <= patIdxEnd; i++) {
+                if ( patArr[i] != ('*' as char)) {
+                    return false
+                }
+            }
+            return true
+        }
+        while ((ch = patArr[patIdxEnd] ) != ('*' as char) && strIdxStart <= strIdxEnd) {
+            if (ch != ('?' as char) && !equals( ch, strArr[strIdxEnd], isCaseSensitive)) {
+                return false
+            }
+            patIdxEnd--
+            strIdxEnd--
+        }
+        if (strIdxStart > strIdxEnd) {
+            for (int i = patIdxStart; i <= patIdxEnd; i++) {
+                if ( patArr[i] != ('*' as char)) {
+                    return false
+                }
+            }
+            return true
+        }
+        while (patIdxStart != patIdxEnd && strIdxStart <= strIdxEnd) {
+            int patIdxTmp = -1
+            for (int i = patIdxStart + 1; i <= patIdxEnd; i++) {
+                if ( patArr[i] == ('*' as char)) {
+                    patIdxTmp = i
+                    break
+                }
+            }
+            if (patIdxTmp == patIdxStart + 1) {
+                patIdxStart++
+                continue
+            }
+            int patLength = ( patIdxTmp - patIdxStart - 1 )
+            int strLength = ( strIdxEnd - strIdxStart + 1 )
+            int foundIdx = -1
+            strLoop:
+            for (int i = 0; i <= strLength - patLength; i++) {
+                for (int j = 0; j < patLength; j++) {
+                    ch = patArr[patIdxStart + j + 1]
+                    if (ch != ('?' as char) && !equals( ch, strArr[strIdxStart + i + j], isCaseSensitive)) {
+                        continue strLoop
+                    }
+                }
+                foundIdx = strIdxStart + i
+                break
+            }
+            if (foundIdx == -1) {
+                return false
+            }
+            patIdxStart = patIdxTmp
+            strIdxStart = foundIdx + patLength
+        }
+        for (int i = patIdxStart; i <= patIdxEnd; i++) {
+            if (patArr[i] != ('*' as char)) {
+                return false
+            }
+        }
+        return true
+    }
+
+    static boolean equals(char c1, char c2, boolean isCaseSensitive) {
+        if (c1 == c2) {
+            return true
+        }
+        if (!isCaseSensitive) {
+            if (Character.toUpperCase(c1) == Character.toUpperCase(c2)
+                    || Character.toLowerCase(c1) == Character.toLowerCase(c2)) {
+                return true
+            }
+        }
+        return false
+    }
+
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/internal/ZipCompressor.groovy

@@ -0,0 +1,11 @@
+package org.xbib.gradle.plugin.shadow.internal
+
+import org.gradle.api.internal.file.archive.compression.ArchiveOutputStreamFactory
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+interface ZipCompressor extends ArchiveOutputStreamFactory {
+
+    @Override
+    ZipOutputStream createArchiveOutputStream(File destination)
+
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/relocation/RelocateClassContext.groovy

@@ -0,0 +1,14 @@
+package org.xbib.gradle.plugin.shadow.relocation
+
+import org.xbib.gradle.plugin.shadow.ShadowStats
+import groovy.transform.Canonical
+import groovy.transform.builder.Builder
+
+@Canonical
+@Builder
+class RelocateClassContext {
+
+    String className
+    ShadowStats stats
+
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/relocation/RelocatePathContext.groovy

@@ -0,0 +1,13 @@
+package org.xbib.gradle.plugin.shadow.relocation
+
+import org.xbib.gradle.plugin.shadow.ShadowStats
+import groovy.transform.Canonical
+import groovy.transform.builder.Builder
+
+@Canonical
+@Builder
+class RelocatePathContext {
+
+    String path
+    ShadowStats stats
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/relocation/Relocator.groovy

@@ -0,0 +1,17 @@
+package org.xbib.gradle.plugin.shadow.relocation
+
+/**
+ * Modified from org.apache.maven.plugins.shade.relocation.Relocator
+ */
+interface Relocator {
+
+    boolean canRelocatePath(RelocatePathContext context)
+
+    String relocatePath(RelocatePathContext context)
+
+    boolean canRelocateClass(RelocateClassContext context)
+
+    String relocateClass(RelocateClassContext context)
+
+    String applyToSourceContent(String sourceContent)
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/relocation/SimpleRelocator.groovy

@@ -0,0 +1,156 @@
+package org.xbib.gradle.plugin.shadow.relocation
+
+import org.xbib.gradle.plugin.shadow.internal.Utils
+
+import java.util.regex.Pattern
+
+/**
+ * Modified from org.apache.maven.plugins.shade.relocation.SimpleRelocator
+ */
+class SimpleRelocator implements Relocator {
+
+    private final String pattern
+
+    private final String pathPattern
+
+    private final String shadedPattern
+
+    private final String shadedPathPattern
+
+    private final Set<String> includes
+
+    private final Set<String> excludes
+
+    private final boolean rawString
+
+    SimpleRelocator(String patt, String shadedPattern, List<String> includes, List<String> excludes) {
+        this(patt, shadedPattern, includes, excludes, false)
+    }
+
+    SimpleRelocator(String patt, String shadedPattern, List<String> includes, List<String> excludes,
+                           boolean rawString) {
+        this.rawString = rawString
+
+        if (rawString) {
+            this.pathPattern = patt
+            this.shadedPathPattern = shadedPattern
+
+            this.pattern = null // not used for raw string relocator
+            this.shadedPattern = null // not used for raw string relocator
+        } else {
+            if (patt == null) {
+                this.pattern = ""
+                this.pathPattern = ""
+            } else {
+                this.pattern = patt.replace('/', '.')
+                this.pathPattern = patt.replace('.', '/')
+            }
+
+            if (shadedPattern != null) {
+                this.shadedPattern = shadedPattern.replace('/', '.')
+                this.shadedPathPattern = shadedPattern.replace('.', '/')
+            } else {
+                this.shadedPattern = "hidden." + this.pattern
+                this.shadedPathPattern = "hidden/" + this.pathPattern
+            }
+        }
+
+        this.includes = normalizePatterns(includes)
+        this.excludes = normalizePatterns(excludes)
+    }
+
+    SimpleRelocator include(String pattern) {
+        this.includes.addAll normalizePatterns([pattern])
+        return this
+    }
+
+    SimpleRelocator exclude(String pattern) {
+        this.excludes.addAll normalizePatterns([pattern])
+        return this
+    }
+
+    private static Set<String> normalizePatterns(Collection<String> patterns) {
+        Set<String> normalized = null
+        if (patterns != null && !patterns.isEmpty()) {
+            normalized = new LinkedHashSet<String>()
+            for (String pattern : patterns) {
+                String classPattern = pattern.replace('.', '/')
+                normalized.add(classPattern)
+                if (classPattern.endsWith("/*")) {
+                    String packagePattern = classPattern.substring(0, classPattern.lastIndexOf('/'))
+                    normalized.add(packagePattern)
+                }
+            }
+        }
+        return normalized ?: []
+    }
+
+    private boolean isIncluded(String path) {
+        if (includes != null && !includes.isEmpty()) {
+            for (String include : includes) {
+                if (Utils.matchPath(include, path, true)) {
+                    return true
+                }
+            }
+            return false
+        }
+        return true
+    }
+
+    private boolean isExcluded(String path) {
+        if (excludes != null && !excludes.isEmpty()) {
+            for (String exclude : excludes) {
+                if (Utils.matchPath(exclude, path, true)) {
+                    return true
+                }
+            }
+        }
+        return false
+    }
+
+    boolean canRelocatePath(RelocatePathContext context) {
+        String path = context.path
+        if (rawString) {
+            return Pattern.compile(pathPattern).matcher(path).find()
+        }
+        if (path.endsWith(".class")) {
+            path = path.substring(0, path.length() - 6)
+        }
+        if (!isIncluded(path) || isExcluded(path)) {
+            return false
+        }
+        // Allow for annoying option of an extra / on the front of a path.
+        // See MSHADE-119 comes from getClass().getResource("/a/b/c.properties").
+        return path.startsWith(pathPattern) || path.startsWith("/" + pathPattern)
+    }
+
+    boolean canRelocateClass(RelocateClassContext context) {
+        String clazz = context.className
+        RelocatePathContext pathContext = RelocatePathContext.builder().path(clazz.replace('.', '/')).stats(context.stats).build()
+        return !rawString && clazz.indexOf('/') < 0 && canRelocatePath(pathContext)
+    }
+
+    String relocatePath(RelocatePathContext context) {
+        String path = context.path
+        context.stats.relocate(pathPattern, shadedPathPattern)
+        if (rawString) {
+            return path.replaceAll(pathPattern, shadedPathPattern)
+        } else {
+            return path.replaceFirst(pathPattern, shadedPathPattern)
+        }
+    }
+
+    String relocateClass(RelocateClassContext context) {
+        String clazz = context.className
+        context.stats.relocate(pathPattern, shadedPathPattern)
+        return clazz.replaceFirst(pattern, shadedPattern)
+    }
+
+    String applyToSourceContent(String sourceContent) {
+        if (rawString) {
+            return sourceContent
+        } else {
+            return sourceContent.replaceAll("\\b" + pattern, shadedPattern)
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/tasks/ConfigureShadowRelocation.groovy

@@ -0,0 +1,50 @@
+package org.xbib.gradle.plugin.shadow.tasks
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.Task
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.InputFiles
+import org.gradle.api.tasks.Optional
+import org.gradle.api.tasks.TaskAction
+
+import java.util.jar.JarFile
+
+class ConfigureShadowRelocation extends DefaultTask {
+
+    @Input
+    ShadowJar target
+
+    @Input
+    String prefix = "shadow"
+
+    @InputFiles @Optional
+    List<Configuration> getConfigurations() {
+        return target.configurations
+    }
+
+    @TaskAction
+    void configureRelocation() {
+        def packages = [] as Set<String>
+        configurations.each { configuration ->
+            configuration.files.each { jar ->
+                JarFile jf = new JarFile(jar)
+                jf.entries().each { entry ->
+                    if (entry.name.endsWith(".class")) {
+                        packages << entry.name[0..entry.name.lastIndexOf('/')-1].replaceAll('/', '.')
+                    }
+                }
+                jf.close()
+            }
+        }
+        packages.each {
+            target.relocate(it, "${prefix}.${it}")
+        }
+
+    }
+
+    static String taskName(Task task) {
+        return "configureRelocation${task.name.capitalize()}"
+    }
+
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/tasks/DefaultInheritManifest.groovy

@@ -0,0 +1,99 @@
+package org.xbib.gradle.plugin.shadow.tasks
+
+import org.gradle.api.Action
+import org.gradle.api.internal.file.FileResolver
+import org.gradle.api.java.archives.Attributes
+import org.gradle.api.java.archives.Manifest
+import org.gradle.api.java.archives.ManifestException
+import org.gradle.api.java.archives.ManifestMergeSpec
+import org.gradle.api.java.archives.internal.DefaultManifest
+import org.gradle.api.java.archives.internal.DefaultManifestMergeSpec
+import org.gradle.util.ConfigureUtil
+
+class DefaultInheritManifest implements InheritManifest {
+
+    private List<DefaultManifestMergeSpec> inheritMergeSpecs = []
+
+    private final FileResolver fileResolver
+
+    private final Manifest internalManifest
+
+    DefaultInheritManifest(FileResolver fileResolver) {
+        this.internalManifest = new DefaultManifest(fileResolver)
+        this.fileResolver = fileResolver
+    }
+
+    InheritManifest inheritFrom(Object... inheritPaths) {
+        inheritFrom(inheritPaths, null)
+        this
+    }
+
+    InheritManifest inheritFrom(Object inheritPaths, Closure closure) {
+        DefaultManifestMergeSpec mergeSpec = new DefaultManifestMergeSpec()
+        mergeSpec.from(inheritPaths)
+        inheritMergeSpecs.add(mergeSpec)
+        ConfigureUtil.configure(closure, mergeSpec)
+        this
+    }
+
+    @Override
+    Attributes getAttributes() {
+        internalManifest.getAttributes()
+    }
+
+    @Override
+    Map<String, Attributes> getSections() {
+        internalManifest.getSections()
+    }
+
+    @Override
+    Manifest attributes(Map<String, ?> map) throws ManifestException {
+        internalManifest.attributes(map)
+        this
+    }
+
+    @Override
+    Manifest attributes(Map<String, ?> map, String s) throws ManifestException {
+        internalManifest.attributes(map, s)
+        this
+    }
+
+    @Override
+    DefaultManifest getEffectiveManifest() {
+        DefaultManifest base = new DefaultManifest(fileResolver)
+        inheritMergeSpecs.each {
+            base = it.merge(base, fileResolver)
+        }
+        base.from internalManifest
+        base.getEffectiveManifest()
+    }
+
+    Manifest writeTo(Writer writer) {
+        this.getEffectiveManifest().writeTo((Object) writer)
+        this
+    }
+
+    @Override
+    Manifest writeTo(Object o) {
+        this.getEffectiveManifest().writeTo(o)
+        this
+    }
+
+    @Override
+    Manifest from(Object... objects) {
+        internalManifest.from(objects)
+        this
+    }
+
+    @Override
+    Manifest from(Object o, Closure<?> closure) {
+        internalManifest.from(o, closure)
+        this
+    }
+
+    @Override
+    Manifest from(Object o, Action<ManifestMergeSpec> action) {
+        internalManifest.from(o, action)
+        this
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/tasks/InheritManifest.groovy

@@ -0,0 +1,10 @@
+package org.xbib.gradle.plugin.shadow.tasks
+
+import org.gradle.api.java.archives.Manifest
+
+interface InheritManifest extends Manifest {
+
+    InheritManifest inheritFrom(Object... inheritPaths)
+
+    InheritManifest inheritFrom(Object inheritPaths, Closure closure)
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/tasks/ShadowCopyAction.groovy

@@ -0,0 +1,503 @@
+package org.xbib.gradle.plugin.shadow.tasks
+
+import org.gradle.api.Action
+import org.gradle.api.GradleException
+import org.gradle.api.UncheckedIOException
+import org.gradle.api.file.FileCopyDetails
+import org.gradle.api.file.FileTreeElement
+import org.gradle.api.file.RelativePath
+import org.gradle.api.internal.DocumentationRegistry
+import org.gradle.api.internal.file.CopyActionProcessingStreamAction
+import org.gradle.api.internal.file.copy.CopyAction
+import org.gradle.api.internal.file.copy.CopyActionProcessingStream
+import org.gradle.api.internal.file.copy.FileCopyDetailsInternal
+import org.gradle.api.logging.Logger
+import org.gradle.api.specs.Spec
+import org.gradle.api.tasks.WorkResult
+import org.gradle.api.tasks.WorkResults
+import org.gradle.api.tasks.bundling.Zip
+import org.gradle.api.tasks.util.PatternSet
+import org.gradle.internal.UncheckedException
+import org.objectweb.asm.ClassReader
+import org.objectweb.asm.ClassVisitor
+import org.objectweb.asm.ClassWriter
+import org.objectweb.asm.commons.ClassRemapper
+import org.xbib.gradle.plugin.shadow.ShadowStats
+import org.xbib.gradle.plugin.shadow.impl.RelocatorRemapper
+import org.xbib.gradle.plugin.shadow.internal.UnusedTracker
+import org.xbib.gradle.plugin.shadow.internal.Utils
+import org.xbib.gradle.plugin.shadow.internal.ZipCompressor
+import org.xbib.gradle.plugin.shadow.relocation.Relocator
+import org.xbib.gradle.plugin.shadow.transformers.Transformer
+import org.xbib.gradle.plugin.shadow.transformers.TransformerContext
+import org.xbib.gradle.plugin.shadow.zip.UnixStat
+import org.xbib.gradle.plugin.shadow.zip.Zip64RequiredException
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipFile
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+import java.time.LocalDate
+import java.time.OffsetDateTime
+import java.util.zip.ZipException
+
+class ShadowCopyAction implements CopyAction {
+
+    static final long CONSTANT_TIME_FOR_ZIP_ENTRIES = LocalDate.of(1980, 1, 1).atStartOfDay()
+                    .toInstant(OffsetDateTime.now().getOffset()).toEpochMilli()
+
+    private final Logger log
+    private final File zipFile
+    private final ZipCompressor compressor
+    private final DocumentationRegistry documentationRegistry
+    private final List<Transformer> transformers
+    private final List<Relocator> relocators
+    private final PatternSet patternSet
+    private final ShadowStats stats
+    private final String encoding
+    private final boolean preserveFileTimestamps
+    private final boolean minimizeJar
+    private final UnusedTracker unusedTracker
+
+    ShadowCopyAction(Logger log, File zipFile, ZipCompressor compressor, DocumentationRegistry documentationRegistry,
+                     String encoding, List<Transformer> transformers, List<Relocator> relocators,
+                     PatternSet patternSet, ShadowStats stats,
+                     boolean preserveFileTimestamps, boolean minimizeJar, UnusedTracker unusedTracker) {
+        this.log = log
+        this.zipFile = zipFile
+        this.compressor = compressor
+        this.documentationRegistry = documentationRegistry
+        this.transformers = transformers
+        this.relocators = relocators
+        this.patternSet = patternSet
+        this.stats = stats
+        this.encoding = encoding
+        this.preserveFileTimestamps = preserveFileTimestamps
+        this.minimizeJar = minimizeJar
+        this.unusedTracker = unusedTracker
+    }
+
+    @Override
+    WorkResult execute(CopyActionProcessingStream stream) {
+        Set<String> unusedClasses
+        if (minimizeJar) {
+            stream.process(new BaseStreamAction() {
+                @Override
+                void visitFile(FileCopyDetails fileDetails) {
+                    if (isArchive(fileDetails)) {
+                        unusedTracker.addDependency(fileDetails.file)
+                    }
+                }
+            })
+            unusedClasses = unusedTracker.findUnused()
+        } else {
+            unusedClasses = Collections.emptySet()
+        }
+
+        try {
+            ZipOutputStream zipOutStr = compressor.createArchiveOutputStream(zipFile)
+            withResource(zipOutStr, new Action<ZipOutputStream>() {
+                void execute(ZipOutputStream outputStream) {
+                    try {
+                        stream.process(new StreamAction(outputStream, encoding, transformers, relocators, patternSet,
+                                unusedClasses, stats))
+                        processTransformers(outputStream)
+                    } catch (Exception e) {
+                        log.error(e.getMessage() as String, e)
+                        throw e
+                    }
+                }
+            })
+        } catch (UncheckedIOException e) {
+            if (e.cause instanceof Zip64RequiredException) {
+                throw new Zip64RequiredException(
+                        String.format("%s\n\nTo build this archive, please enable the zip64 extension.\nSee: %s",
+                                e.cause.message, documentationRegistry.getDslRefForProperty(Zip, "zip64"))
+                )
+            }
+        } catch (Exception e) {
+            throw new GradleException("could not create zip '${zipFile.toString()}'", e)
+        }
+        return WorkResults.didWork(true)
+    }
+
+    private void processTransformers(ZipOutputStream stream) {
+        transformers.each { Transformer transformer ->
+            if (transformer.hasTransformedResource()) {
+                transformer.modifyOutputStream(stream, preserveFileTimestamps)
+            }
+        }
+    }
+
+    private long getArchiveTimeFor(long timestamp) {
+        return preserveFileTimestamps ? timestamp : CONSTANT_TIME_FOR_ZIP_ENTRIES
+    }
+
+    private ZipEntry setArchiveTimes(ZipEntry zipEntry) {
+        if (!preserveFileTimestamps) {
+            zipEntry.setTime(CONSTANT_TIME_FOR_ZIP_ENTRIES)
+        }
+        return zipEntry
+    }
+
+    private static <T extends Closeable> void withResource(T resource, Action<? super T> action) {
+        try {
+            action.execute(resource)
+        } catch (Throwable t) {
+            try {
+                resource.close()
+            } catch (IOException e) {
+                // Ignored
+            }
+            throw UncheckedException.throwAsUncheckedException(t)
+        }
+
+        try {
+            resource.close()
+        } catch (IOException e) {
+            throw new UncheckedIOException(e)
+        }
+    }
+
+    abstract class BaseStreamAction implements CopyActionProcessingStreamAction {
+        protected boolean isArchive(FileCopyDetails fileDetails) {
+            return fileDetails.relativePath.pathString.endsWith('.jar')
+        }
+
+        protected boolean isClass(FileCopyDetails fileDetails) {
+            return Utils.getExtension(fileDetails.path) == 'class'
+        }
+
+        @Override
+        void processFile(FileCopyDetailsInternal details) {
+            if (details.directory) {
+                visitDir(details)
+            } else {
+                visitFile(details)
+            }
+        }
+
+        protected void visitDir(FileCopyDetails dirDetails) {}
+
+        protected abstract void visitFile(FileCopyDetails fileDetails)
+    }
+
+    private class StreamAction extends BaseStreamAction {
+
+        private final ZipOutputStream zipOutStr
+        private final List<Transformer> transformers
+        private final List<Relocator> relocators
+        private final RelocatorRemapper remapper
+        private final PatternSet patternSet
+        private final Set<String> unused
+        private final ShadowStats stats
+
+        private Set<String> visitedFiles = new HashSet<String>()
+
+        StreamAction(ZipOutputStream zipOutStr, String encoding, List<Transformer> transformers,
+                            List<Relocator> relocators, PatternSet patternSet, Set<String> unused,
+                            ShadowStats stats) {
+            this.zipOutStr = zipOutStr
+            this.transformers = transformers
+            this.relocators = relocators
+            this.remapper = new RelocatorRemapper(relocators, stats)
+            this.patternSet = patternSet
+            this.unused = unused
+            this.stats = stats
+            if(encoding != null) {
+                this.zipOutStr.setEncoding(encoding)
+            }
+        }
+
+        private boolean recordVisit(RelativePath path) {
+            return visitedFiles.add(path.pathString)
+        }
+
+        @Override
+        void visitFile(FileCopyDetails fileDetails) {
+            if (!isArchive(fileDetails)) {
+                try {
+                    boolean isClass = isClass(fileDetails)
+                    if (!remapper.hasRelocators() || !isClass) {
+                        if (!isTransformable(fileDetails)) {
+                            String mappedPath = remapper.map(fileDetails.relativePath.pathString)
+                            ZipEntry archiveEntry = new ZipEntry(mappedPath)
+                            archiveEntry.setTime(getArchiveTimeFor(fileDetails.lastModified))
+                            archiveEntry.unixMode = (UnixStat.FILE_FLAG | fileDetails.mode)
+                            zipOutStr.putNextEntry(archiveEntry)
+                            fileDetails.copyTo(zipOutStr)
+                            zipOutStr.closeEntry()
+                        } else {
+                            transform(fileDetails)
+                        }
+                    } else if (isClass && !isUnused(fileDetails.path)) {
+                        remapClass(fileDetails)
+                    }
+                    recordVisit(fileDetails.relativePath)
+                } catch (Exception e) {
+                    throw new GradleException(String.format("Could not add %s to ZIP '%s'.", fileDetails, zipFile), e)
+                }
+            } else {
+                processArchive(fileDetails)
+            }
+        }
+
+        private void processArchive(FileCopyDetails fileDetails) {
+            stats.startJar()
+            ZipFile archive = new ZipFile(fileDetails.file)
+            List<ArchiveFileTreeElement> archiveElements = archive.entries.collect {
+                new ArchiveFileTreeElement(new RelativeArchivePath(it, fileDetails))
+            }
+            Spec<FileTreeElement> patternSpec = patternSet.getAsSpec()
+            List<ArchiveFileTreeElement> filteredArchiveElements = archiveElements.findAll { ArchiveFileTreeElement archiveElement ->
+                patternSpec.isSatisfiedBy(archiveElement)
+            }
+            filteredArchiveElements.each { ArchiveFileTreeElement archiveElement ->
+                if (archiveElement.relativePath.file) {
+                    visitArchiveFile(archiveElement, archive)
+                }
+            }
+            archive.close()
+            stats.finishJar()
+        }
+
+        private void visitArchiveDirectory(RelativeArchivePath archiveDir) {
+            if (recordVisit(archiveDir)) {
+                zipOutStr.putNextEntry(archiveDir.entry)
+                zipOutStr.closeEntry()
+            }
+        }
+
+        private void visitArchiveFile(ArchiveFileTreeElement archiveFile, ZipFile archive) {
+            def archiveFilePath = archiveFile.relativePath
+            if (archiveFile.classFile || !isTransformable(archiveFile)) {
+                if (recordVisit(archiveFilePath) && !isUnused(archiveFilePath.entry.name)) {
+                    if (!remapper.hasRelocators() || !archiveFile.classFile) {
+                        copyArchiveEntry(archiveFilePath, archive)
+                    } else {
+                        remapClass(archiveFilePath, archive)
+                    }
+                }
+            } else {
+                transform(archiveFile, archive)
+            }
+        }
+
+        private void addParentDirectories(RelativeArchivePath file) {
+            if (file) {
+                addParentDirectories(file.parent)
+                if (!file.file) {
+                    visitArchiveDirectory(file)
+                }
+            }
+        }
+
+        private boolean isUnused(String classPath) {
+            final String className = Utils.removeExtension(classPath)
+                    .replace('/' as char, '.' as char)
+            final boolean result = unused.contains(className)
+            if (result) {
+                log.debug("dropping unused class: $className")
+            }
+            return result
+        }
+
+        private void remapClass(RelativeArchivePath file, ZipFile archive) {
+            if (file.classFile) {
+                ZipEntry zipEntry = setArchiveTimes(new ZipEntry(remapper.mapPath(file) + '.class'))
+                addParentDirectories(new RelativeArchivePath(zipEntry, null))
+                InputStream is = archive.getInputStream(file.entry)
+                try {
+                    remapClass(is, file.pathString, file.entry.time)
+                } finally {
+                    is.close()
+                }
+            }
+        }
+
+        private void remapClass(FileCopyDetails fileCopyDetails) {
+            if (Utils.getExtension(fileCopyDetails.name) == 'class') {
+                remapClass(fileCopyDetails.file.newInputStream(), fileCopyDetails.path, fileCopyDetails.lastModified)
+            }
+        }
+
+        private void remapClass(InputStream classInputStream, String path, long lastModified) {
+            InputStream is = classInputStream
+            ClassReader cr = new ClassReader(is)
+            ClassWriter cw = new ClassWriter(0)
+            ClassVisitor cv = new ClassRemapper(cw, remapper)
+            try {
+                cr.accept(cv, ClassReader.EXPAND_FRAMES)
+            } catch (Throwable ise) {
+                throw new GradleException("error in ASM processing class " + path, ise)
+            }
+            byte[] renamedClass = cw.toByteArray()
+            String mappedName = remapper.mapPath(path)
+            InputStream bis = new ByteArrayInputStream(renamedClass)
+            try {
+                ZipEntry archiveEntry = new ZipEntry(mappedName + ".class")
+                archiveEntry.setTime(getArchiveTimeFor(lastModified))
+                zipOutStr.putNextEntry(archiveEntry)
+                Utils.copyLarge(bis, zipOutStr)
+                zipOutStr.closeEntry()
+            } catch (ZipException e) {
+                log.warn("there is a duplicate " + mappedName + " in source project")
+            } finally {
+                bis.close()
+            }
+        }
+
+        private void copyArchiveEntry(RelativeArchivePath archiveFile, ZipFile archive) {
+            String mappedPath = remapper.map(archiveFile.entry.name)
+            ZipEntry entry = new ZipEntry(mappedPath)
+            entry.setTime(getArchiveTimeFor(archiveFile.entry.time))
+            RelativeArchivePath mappedFile = new RelativeArchivePath(entry, archiveFile.details)
+            addParentDirectories(mappedFile)
+            zipOutStr.putNextEntry(mappedFile.entry)
+            InputStream is = archive.getInputStream(archiveFile.entry)
+            try {
+                Utils.copyLarge(is, zipOutStr)
+            } finally {
+                is.close()
+            }
+            zipOutStr.closeEntry()
+        }
+
+        @Override
+        protected void visitDir(FileCopyDetails dirDetails) {
+            try {
+                String path = dirDetails.relativePath.pathString + '/'
+                ZipEntry archiveEntry = new ZipEntry(path)
+                archiveEntry.setTime(getArchiveTimeFor(dirDetails.lastModified))
+                archiveEntry.unixMode = (UnixStat.DIR_FLAG | dirDetails.mode)
+                zipOutStr.putNextEntry(archiveEntry)
+                zipOutStr.closeEntry()
+                recordVisit(dirDetails.relativePath)
+            } catch (Exception e) {
+                throw new GradleException(String.format("Could not add %s to ZIP '%s'.", dirDetails, zipFile), e)
+            }
+        }
+
+        private void transform(ArchiveFileTreeElement element, ZipFile archive) {
+            InputStream is = archive.getInputStream(element.relativePath.entry)
+            try {
+                transform(element, is)
+            } finally {
+                is.close()
+            }
+        }
+
+        private void transform(FileCopyDetails details) {
+            transform(details, details.file.newInputStream())
+        }
+
+        private void transform(FileTreeElement element, InputStream inputStream) {
+            String mappedPath = remapper.map(element.relativePath.pathString)
+            transformers.find { it.canTransformResource(element) }.transform(
+                    TransformerContext.builder()
+                            .path(mappedPath)
+                            .inputStream(inputStream)
+                            .relocators(relocators)
+                            .stats(stats)
+                            .build()
+            )
+        }
+
+        private boolean isTransformable(FileTreeElement element) {
+            return transformers.any { it.canTransformResource(element) }
+        }
+
+    }
+
+    class RelativeArchivePath extends RelativePath {
+
+        ZipEntry entry
+        FileCopyDetails details
+
+        RelativeArchivePath(ZipEntry entry, FileCopyDetails fileDetails) {
+            super(!entry.directory, entry.name.split('/'))
+            this.entry = entry
+            this.details = fileDetails
+        }
+
+        boolean isClassFile() {
+            return lastName.endsWith('.class')
+        }
+
+        RelativeArchivePath getParent() {
+            if (!segments || segments.length == 1) {
+                return null
+            } else {
+                String path = segments[0..-2].join('/') + '/'
+                return new RelativeArchivePath(setArchiveTimes(new ZipEntry(path)), null)
+            }
+        }
+    }
+
+    class ArchiveFileTreeElement implements FileTreeElement {
+
+        private final RelativeArchivePath archivePath
+
+        ArchiveFileTreeElement(RelativeArchivePath archivePath) {
+            this.archivePath = archivePath
+        }
+
+        boolean isClassFile() {
+            return archivePath.classFile
+        }
+
+        @Override
+        File getFile() {
+            return null
+        }
+
+        @Override
+        boolean isDirectory() {
+            return archivePath.entry.directory
+        }
+
+        @Override
+        long getLastModified() {
+            return archivePath.entry.lastModifiedDate.time
+        }
+
+        @Override
+        long getSize() {
+            return archivePath.entry.size
+        }
+
+        @Override
+        InputStream open() {
+            return null
+        }
+
+        @Override
+        void copyTo(OutputStream outputStream) {
+
+        }
+
+        @Override
+        boolean copyTo(File file) {
+            return false
+        }
+
+        @Override
+        String getName() {
+            return archivePath.pathString
+        }
+
+        @Override
+        String getPath() {
+            return archivePath.lastName
+        }
+
+        @Override
+        RelativeArchivePath getRelativePath() {
+            return archivePath
+        }
+
+        @Override
+        int getMode() {
+            return archivePath.entry.unixMode
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/tasks/ShadowJar.groovy

@@ -0,0 +1,398 @@
+package org.xbib.gradle.plugin.shadow.tasks
+
+import org.gradle.api.file.DuplicatesStrategy
+import org.gradle.api.internal.file.copy.CopySpecResolver
+import org.gradle.api.logging.LogLevel
+import org.gradle.api.tasks.bundling.ZipEntryCompression
+import org.gradle.api.Action
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.file.FileCollection
+import org.gradle.api.internal.DocumentationRegistry
+import org.gradle.api.internal.file.FileResolver
+import org.gradle.api.internal.file.copy.CopyAction
+import org.gradle.api.tasks.InputFiles
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.Optional
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.bundling.Jar
+import org.gradle.api.tasks.util.PatternSet
+import org.gradle.internal.Factory
+import org.gradle.api.tasks.util.internal.PatternSets
+import org.xbib.gradle.plugin.shadow.ShadowStats
+import org.xbib.gradle.plugin.shadow.internal.DefaultDependencyFilter
+import org.xbib.gradle.plugin.shadow.internal.DefaultZipCompressor
+import org.xbib.gradle.plugin.shadow.internal.DependencyFilter
+import org.xbib.gradle.plugin.shadow.internal.UnusedTracker
+import org.xbib.gradle.plugin.shadow.internal.ZipCompressor
+import org.xbib.gradle.plugin.shadow.relocation.Relocator
+import org.xbib.gradle.plugin.shadow.relocation.SimpleRelocator
+import org.xbib.gradle.plugin.shadow.transformers.AppendingTransformer
+import org.xbib.gradle.plugin.shadow.transformers.GroovyExtensionModuleTransformer
+import org.xbib.gradle.plugin.shadow.transformers.ServiceFileTransformer
+import org.xbib.gradle.plugin.shadow.transformers.Transformer
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+import java.util.concurrent.Callable
+
+class ShadowJar extends Jar implements ShadowSpec {
+
+    private List<Transformer> transformers
+
+    private List<Relocator> relocators
+
+    private List<Configuration> configurations
+
+    private DependencyFilter dependencyFilter
+
+    private boolean minimizeJar
+
+    private DependencyFilter dependencyFilterForMinimize
+
+    private ShadowStats shadowStats
+
+    ShadowJar() {
+        super()
+        dependencyFilter = new DefaultDependencyFilter(getProject())
+        dependencyFilterForMinimize = new DefaultDependencyFilter(getProject())
+        setManifest(new DefaultInheritManifest(getServices().get(FileResolver)))
+        transformers = []
+        relocators = []
+        configurations = []
+        shadowStats = new ShadowStats()
+        setDuplicatesStrategy(DuplicatesStrategy.INCLUDE)
+    }
+
+    @Override
+    ShadowJar minimize() {
+        minimizeJar = true
+        this
+    }
+
+    @Override
+    ShadowJar minimize(Action<DependencyFilter> c) {
+        minimize()
+        if (c != null) {
+            c.execute(dependencyFilterForMinimize)
+        }
+        return this
+    }
+
+    @Override
+    @Internal
+    ShadowStats getStats() {
+        shadowStats
+    }
+
+    @Override
+    InheritManifest getManifest() {
+        (InheritManifest) super.getManifest()
+    }
+
+    @Override
+    protected CopyAction createCopyAction() {
+        DocumentationRegistry documentationRegistry = getServices().get(DocumentationRegistry)
+        FileCollection toMinimize = dependencyFilterForMinimize.resolve(configurations)
+        UnusedTracker unusedTracker = UnusedTracker.forProject(getProject(), toMinimize)
+        CopySpecResolver copySpecResolver = mainSpec.buildRootResolver()
+        Factory<PatternSet> patternSetFactory = PatternSets.getNonCachingPatternSetFactory()
+        PatternSet patternSet = patternSetFactory.create()
+        patternSet.setCaseSensitive(copySpecResolver.caseSensitive)
+        patternSet.include(copySpecResolver.allIncludes)
+        patternSet.includeSpecs(copySpecResolver.allIncludeSpecs)
+        patternSet.exclude(copySpecResolver.allExcludes)
+        patternSet.excludeSpecs(copySpecResolver.allExcludeSpecs)
+        new ShadowCopyAction(getLogger(), getArchiveFile().get().getAsFile(), getInternalCompressor(), documentationRegistry,
+                this.getMetadataCharset(), transformers, relocators, patternSet, shadowStats,
+                isPreserveFileTimestamps(), minimizeJar, unusedTracker)
+    }
+
+    @Internal
+    protected ZipCompressor getInternalCompressor() {
+        switch (getEntryCompression()) {
+            case ZipEntryCompression.DEFLATED:
+                return new DefaultZipCompressor(isZip64(), ZipOutputStream.DEFLATED)
+            case ZipEntryCompression.STORED:
+                return new DefaultZipCompressor(isZip64(), ZipOutputStream.STORED)
+            default:
+                throw new IllegalArgumentException(String.format("unknown compression type %s", entryCompression))
+        }
+    }
+
+    @TaskAction
+    protected void copy() {
+        from(getIncludedDependencies())
+        super.copy()
+        getLogger().info(shadowStats.toString())
+    }
+
+    @InputFiles
+    FileCollection getIncludedDependencies() {
+        getProject().files(new Callable<FileCollection>() {
+
+            @Override
+            FileCollection call() throws Exception {
+                return dependencyFilter.resolve(configurations)
+            }
+        })
+    }
+
+    /**
+     * Configure inclusion/exclusion of module & project dependencies into uber jar.
+     *
+     * @param c the configuration of the filter
+     * @return this
+     */
+    @Override
+    ShadowJar dependencies(Action<DependencyFilter> c) {
+        if (c != null) {
+            c.execute(dependencyFilter)
+        }
+        this
+    }
+
+    /**
+     * Add a Transformer instance for modifying JAR resources and configure.
+     *
+     * @param clazz the transformer to add. Must have a no-arg constructor
+     * @return this
+     */
+    @Override
+    ShadowJar transform(Class<? extends Transformer> clazz)
+            throws InstantiationException, IllegalAccessException {
+        transform(clazz, null)
+    }
+
+    /**
+     * Add a Transformer instance for modifying JAR resources and configure.
+     *
+     * @param clazz the transformer class to add. Must have no-arg constructor
+     * @param c the configuration for the transformer
+     * @return this
+     */
+    @Override
+    ShadowJar transform(Class<? extends Transformer> clazz, Action<? extends Transformer> c)
+            throws InstantiationException, IllegalAccessException {
+        Transformer transformer = clazz.getDeclaredConstructor().newInstance()
+        if (c != null) {
+            c.execute(transformer)
+        }
+        transformers.add(transformer)
+        this
+    }
+
+    /**
+     * Add a preconfigured transformer instance.
+     *
+     * @param transformer the transformer instance to add
+     * @return this
+     */
+    @Override
+    ShadowJar transform(Transformer transformer) {
+        transformers.add(transformer)
+        this
+    }
+
+    /**
+     * Syntactic sugar for merging service files in JARs.
+     *
+     * @return this
+     */
+    @Override
+    ShadowJar mergeServiceFiles() {
+        try {
+            transform(ServiceFileTransformer.class)
+        } catch (IllegalAccessException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        } catch (InstantiationException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        }
+        this
+    }
+
+    /**
+     * Syntactic sugar for merging service files in JARs.
+     *
+     * @return this
+     */
+    @Override
+    ShadowJar mergeServiceFiles(String rootPath) {
+        try {
+            transform(ServiceFileTransformer.class, new Action<ServiceFileTransformer>() {
+
+                @Override
+                void execute(ServiceFileTransformer serviceFileTransformer) {
+                    serviceFileTransformer.setPath(rootPath)
+                }
+            })
+        } catch (IllegalAccessException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        } catch (InstantiationException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        }
+        this
+    }
+
+    /**
+     * Syntactic sugar for merging service files in JARs.
+     *
+     * @return this
+     */
+    @Override
+    ShadowJar mergeServiceFiles(Action<ServiceFileTransformer> configureClosure) {
+        try {
+            transform(ServiceFileTransformer.class, configureClosure)
+        } catch (IllegalAccessException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        } catch (InstantiationException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        }
+        this
+    }
+
+    /**
+     * Syntactic sugar for merging Groovy extension module descriptor files in JARs
+     *
+     * @return this
+     */
+    @Override
+    ShadowJar mergeGroovyExtensionModules() {
+        try {
+            transform(GroovyExtensionModuleTransformer.class)
+        } catch (IllegalAccessException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        } catch (InstantiationException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        }
+        this
+    }
+
+    /**
+     * Syntactic sugar for merging service files in JARs
+     *
+     * @return this
+     */
+    @Override
+    ShadowJar append(String resourcePath) {
+        try {
+            transform(AppendingTransformer.class, new Action<AppendingTransformer>() {
+                @Override
+                void execute(AppendingTransformer transformer) {
+                    transformer.setResource(resourcePath)
+                }
+            })
+        } catch (IllegalAccessException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        } catch (InstantiationException e) {
+            getLogger().log(LogLevel.ERROR, e.getMessage() as String, e)
+        }
+        return this
+    }
+
+    /**
+     * Add a class relocator that maps each class in the pattern to the provided destination.
+     *
+     * @param pattern the source pattern to relocate
+     * @param destination the destination package
+     * @return this
+     */
+    @Override
+    ShadowJar relocate(String pattern, String destination) {
+        relocate(pattern, destination, null)
+    }
+
+    /**
+     * Add a class relocator that maps each class in the pattern to the provided destination.
+     *
+     * @param pattern the source pattern to relocate
+     * @param destination the destination package
+     * @param configure the configuration of the relocator
+     * @return this
+     */
+    @Override
+    ShadowJar relocate(String pattern, String destination, Action<SimpleRelocator> configure) {
+        SimpleRelocator relocator = new SimpleRelocator(pattern, destination, new ArrayList<String>(), new ArrayList<String>());
+        if (configure != null) {
+            configure.execute(relocator)
+        }
+        relocators.add(relocator)
+        this
+    }
+
+    /**
+     * Add a relocator instance.
+     *
+     * @param relocator the relocator instance to add
+     * @return this
+     */
+    @Override
+    ShadowJar relocate(Relocator relocator) {
+        relocators.add(relocator)
+        this
+    }
+
+    /**
+     * Add a relocator of the provided class.
+     *
+     * @param relocatorClass the relocator class to add. Must have a no-arg constructor.
+     * @return this
+     */
+    @Override
+    ShadowJar relocate(Class<? extends Relocator> relocatorClass)
+            throws InstantiationException, IllegalAccessException {
+        relocate(relocatorClass, null)
+    }
+
+    /**
+     * Add a relocator of the provided class and configure.
+     *
+     * @param relocatorClass the relocator class to add. Must have a no-arg constructor
+     * @param configure the configuration for the relocator
+     * @return this
+     */
+    @Override
+    ShadowJar relocate(Class<? extends Relocator> relocatorClass, Action<? extends Relocator> configure)
+            throws InstantiationException, IllegalAccessException {
+        Relocator relocator = relocatorClass.getDeclaredConstructor().newInstance()
+        if (configure != null) {
+            configure.execute(relocator)
+        }
+        relocators.add(relocator)
+        this
+    }
+
+    @Internal
+    List<Transformer> getTransformers() {
+        return this.transformers
+    }
+
+    void setTransformers(List<Transformer> transformers) {
+        this.transformers = transformers
+    }
+
+    @Internal
+    List<Relocator> getRelocators() {
+        return this.relocators
+    }
+
+    void setRelocators(List<Relocator> relocators) {
+        this.relocators = relocators
+    }
+
+    @InputFiles @Optional
+    List<Configuration> getConfigurations() {
+        this.configurations
+    }
+
+    void setConfigurations(List<Configuration> configurations) {
+        this.configurations = configurations
+    }
+
+    @Internal
+    DependencyFilter getDependencyFilter() {
+        return this.dependencyFilter
+    }
+
+    void setDependencyFilter(DependencyFilter filter) {
+        this.dependencyFilter = filter
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/tasks/ShadowSpec.groovy

@@ -0,0 +1,51 @@
+package org.xbib.gradle.plugin.shadow.tasks
+
+import org.xbib.gradle.plugin.shadow.ShadowStats
+import org.xbib.gradle.plugin.shadow.internal.DependencyFilter
+import org.xbib.gradle.plugin.shadow.relocation.Relocator
+import org.xbib.gradle.plugin.shadow.relocation.SimpleRelocator
+import org.xbib.gradle.plugin.shadow.transformers.ServiceFileTransformer
+import org.xbib.gradle.plugin.shadow.transformers.Transformer
+import org.gradle.api.Action
+import org.gradle.api.file.CopySpec
+
+interface ShadowSpec extends CopySpec {
+
+    ShadowSpec minimize()
+
+    ShadowSpec minimize(Action<DependencyFilter> configureClosure)
+
+    ShadowSpec dependencies(Action<DependencyFilter> configure)
+
+    ShadowSpec transform(Class<? extends Transformer> clazz)
+            throws InstantiationException, IllegalAccessException
+
+    ShadowSpec transform(Class<? extends Transformer> clazz, Action<? extends Transformer> configure)
+            throws InstantiationException, IllegalAccessException
+
+    ShadowSpec transform(Transformer transformer)
+
+    ShadowSpec mergeServiceFiles()
+
+    ShadowSpec mergeServiceFiles(String rootPath)
+
+    ShadowSpec mergeServiceFiles(Action<ServiceFileTransformer> configureClosure)
+
+    ShadowSpec mergeGroovyExtensionModules()
+
+    ShadowSpec append(String resourcePath)
+
+    ShadowSpec relocate(String pattern, String destination)
+
+    ShadowSpec relocate(String pattern, String destination, Action<SimpleRelocator> configure)
+
+    ShadowSpec relocate(Relocator relocator)
+
+    ShadowSpec relocate(Class<? extends Relocator> clazz)
+            throws InstantiationException, IllegalAccessException
+
+    ShadowSpec relocate(Class<? extends Relocator> clazz, Action<? extends Relocator> configure)
+            throws InstantiationException, IllegalAccessException
+
+    ShadowStats getStats()
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/ApacheLicenseResourceTransformer.groovy

@@ -0,0 +1,35 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+/**
+ * Prevents duplicate copies of the license
+ * Modified from org.apache.maven.plugins.shade.resouce.ApacheLicenseResourceTransformer.
+ */
+class ApacheLicenseResourceTransformer implements Transformer {
+
+    private static final String LICENSE_PATH = "META-INF/LICENSE"
+
+    private static final String LICENSE_TXT_PATH = "META-INF/LICENSE.txt"
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        def path = element.relativePath.pathString
+        return LICENSE_PATH.equalsIgnoreCase(path) ||
+                LICENSE_TXT_PATH.regionMatches(true, 0, path, 0, LICENSE_TXT_PATH.length())
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        return false
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream jos, boolean preserveFileTimestamps) {
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/ApacheNoticeResourceTransformer.groovy

@@ -0,0 +1,184 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+import java.text.SimpleDateFormat
+
+/**
+ * Merges <code>META-INF/NOTICE.TXT</code> files.
+ * Modified from org.apache.maven.plugins.shade.resource.ApacheNoticeResourceTransformer
+ */
+class ApacheNoticeResourceTransformer implements Transformer {
+    Set<String> entries = new LinkedHashSet<String>()
+
+    Map<String, Set<String>> organizationEntries = new LinkedHashMap<String, Set<String>>()
+
+    String projectName = ""
+
+    boolean addHeader = true
+
+    String preamble1 = "// ------------------------------------------------------------------\n" +
+            "// NOTICE file corresponding to the section 4d of The Apache License,\n" +
+            "// Version 2.0, in this case for "
+
+    String preamble2 = "\n// ------------------------------------------------------------------\n"
+
+    String preamble3 = "This product includes software developed at\n"
+
+    String organizationName = "The Apache Software Foundation"
+
+    String organizationURL = "http://www.apache.org/"
+
+    String inceptionYear = "2006"
+
+    String copyright
+
+    /**
+     * The file encoding of the <code>NOTICE</code> file.
+     */
+    String encoding
+
+    private static final String NOTICE_PATH = "META-INF/NOTICE"
+
+    private static final String NOTICE_TXT_PATH = "META-INF/NOTICE.txt"
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        def path = element.relativePath.pathString
+        if (NOTICE_PATH.equalsIgnoreCase(path) || NOTICE_TXT_PATH.equalsIgnoreCase(path)) {
+            return true
+        }
+
+        return false
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        if (entries.isEmpty()) {
+            String year = new SimpleDateFormat("yyyy").format(new Date())
+            if (!inceptionYear.equals(year)) {
+                year = inceptionYear + "-" + year
+            }
+
+            //add headers
+            if (addHeader) {
+                entries.add(preamble1 + projectName + preamble2)
+            } else {
+                entries.add("")
+            }
+            //fake second entry, we'll look for a real one later
+            entries.add(projectName + "\nCopyright " + year + " " + organizationName + "\n")
+            entries.add(preamble3 + organizationName + " (" + organizationURL + ").\n")
+        }
+
+        BufferedReader reader
+        if (encoding != null && !encoding.isEmpty()) {
+            reader = new BufferedReader(new InputStreamReader(context.inputStream, encoding))
+        } else {
+            reader = new BufferedReader(new InputStreamReader(context.inputStream))
+        }
+
+        String line = reader.readLine()
+        StringBuffer sb = new StringBuffer()
+        Set<String> currentOrg = null
+        int lineCount = 0
+        while (line != null) {
+            String trimedLine = line.trim()
+
+            if (!trimedLine.startsWith("//")) {
+                if (trimedLine.length() > 0) {
+                    if (trimedLine.startsWith("- ")) {
+                        //resource-bundle 1.3 mode
+                        if (lineCount == 1
+                                && sb.toString().indexOf("This product includes/uses software(s) developed by") != -1) {
+                            currentOrg = organizationEntries.get(sb.toString().trim())
+                            if (currentOrg == null) {
+                                currentOrg = new TreeSet<String>()
+                                organizationEntries.put(sb.toString().trim(), currentOrg)
+                            }
+                            sb = new StringBuffer()
+                        } else if (sb.length() > 0 && currentOrg != null) {
+                            currentOrg.add(sb.toString())
+                            sb = new StringBuffer()
+                        }
+
+                    }
+                    sb.append(line).append("\n")
+                    lineCount++
+                } else {
+                    String ent = sb.toString()
+                    if (ent.startsWith(projectName) && ent.indexOf("Copyright ") != -1) {
+                        copyright = ent
+                    }
+                    if (currentOrg == null) {
+                        entries.add(ent)
+                    } else {
+                        currentOrg.add(ent)
+                    }
+                    sb = new StringBuffer()
+                    lineCount = 0
+                    currentOrg = null
+                }
+            }
+
+            line = reader.readLine()
+        }
+        if (sb.length() > 0) {
+            if (currentOrg == null) {
+                entries.add(sb.toString())
+            } else {
+                currentOrg.add(sb.toString())
+            }
+        }
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        return true
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream os, boolean preserveFileTimestamps) {
+        ZipEntry zipEntry = new ZipEntry(NOTICE_PATH)
+        zipEntry.time = TransformerContext.getEntryTimestamp(preserveFileTimestamps, zipEntry.time)
+        os.putNextEntry(zipEntry)
+
+        Writer pow
+        if (encoding != null && !encoding.isEmpty()) {
+            pow = new OutputStreamWriter(os, encoding)
+        } else {
+            pow = new OutputStreamWriter(os)
+        }
+        PrintWriter writer = new PrintWriter(pow)
+
+        int count = 0
+        for (String line : entries) {
+            ++count
+            if (line.equals(copyright) && count != 2) {
+                continue
+            }
+
+            if (count == 2 && copyright != null) {
+                writer.print(copyright)
+                writer.print('\n')
+            } else {
+                writer.print(line)
+                writer.print('\n')
+            }
+            if (count == 3) {
+                for (Map.Entry<String, Set<String>> entry : organizationEntries.entrySet()) {
+                    writer.print(entry.getKey())
+                    writer.print('\n')
+                    for (String l : entry.getValue()) {
+                        writer.print(l)
+                    }
+                    writer.print('\n')
+                }
+            }
+        }
+        writer.flush()
+        entries.clear()
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/AppendingTransformer.groovy

@@ -0,0 +1,43 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.internal.Utils
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+/**
+ * A resource processor that appends content for a resource, separated by a newline.
+ * Modified from org.apache.maven.plugins.shade.resource.AppendingTransformer.
+ */
+class AppendingTransformer implements Transformer {
+    String resource
+
+    ByteArrayOutputStream data = new ByteArrayOutputStream()
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        def path = element.relativePath.pathString
+        resource != null && resource.equalsIgnoreCase(path)
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        Utils.copyLarge(context.inputStream, data)
+        data.write('\n'.bytes)
+        context.inputStream.close()
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        return data.size() > 0
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream os, boolean preserveFileTimestamps) {
+        ZipEntry entry = new ZipEntry(resource)
+        entry.time = TransformerContext.getEntryTimestamp(preserveFileTimestamps, entry.time)
+        os.putNextEntry(entry)
+        Utils.copyLarge(new ByteArrayInputStream(data.toByteArray()), os)
+        data.reset()
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/DontIncludeResourceTransformer.groovy

@@ -0,0 +1,37 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+/**
+ * A resource processor that prevents the inclusion of an arbitrary resource into the shaded JAR.
+ * Modified from org.apache.maven.plugins.shade.resource.DontIncludeResourceTransformer
+ */
+class DontIncludeResourceTransformer implements Transformer {
+    String resource
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        def path = element.relativePath.pathString
+        if (path.endsWith(resource)) {
+            return true
+        }
+
+        return false
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        // no op
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        return false
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream os, boolean preserveFileTimestamps) {
+        // no op
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/GroovyExtensionModuleTransformer.groovy

@@ -0,0 +1,89 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.internal.Utils
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+/**
+ * Modified from eu.appsatori.gradle.fatjar.tasks.PrepareFiles.groovy
+ * Resource transformer that merges Groovy extension module descriptor files into a single file. If there are several
+ * META-INF/services/org.codehaus.groovy.runtime.ExtensionModule resources spread across many JARs the individual
+ * entries will all be merged into a single META-INF/services/org.codehaus.groovy.runtime.ExtensionModule resource
+ * packaged into the resultant JAR produced by the shadowing process.
+ */
+class GroovyExtensionModuleTransformer implements Transformer {
+
+    private static final GROOVY_EXTENSION_MODULE_DESCRIPTOR_PATH =
+            "META-INF/services/org.codehaus.groovy.runtime.ExtensionModule"
+
+    private static final MODULE_NAME_KEY = 'moduleName'
+    private static final MODULE_VERSION_KEY = 'moduleVersion'
+    private static final EXTENSION_CLASSES_KEY = 'extensionClasses'
+    private static final STATIC_EXTENSION_CLASSES_KEY = 'staticExtensionClasses'
+
+    private static final MERGED_MODULE_NAME = 'MergedByShadowJar'
+    private static final MERGED_MODULE_VERSION = '1.0.0'
+
+    private final Properties module = new Properties()
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        return element.relativePath.pathString == GROOVY_EXTENSION_MODULE_DESCRIPTOR_PATH
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        def props = new Properties()
+        props.load(context.inputStream)
+        props.each { String key, String value ->
+            switch (key) {
+                case MODULE_NAME_KEY:
+                    handle(key, value) {
+                        module.setProperty(key, MERGED_MODULE_NAME)
+                    }
+                    break
+                case MODULE_VERSION_KEY:
+                    handle(key, value) {
+                        module.setProperty(key, MERGED_MODULE_VERSION)
+                    }
+                    break
+                case [EXTENSION_CLASSES_KEY, STATIC_EXTENSION_CLASSES_KEY]:
+                    handle(key, value) { String existingValue ->
+                        def newValue = "${existingValue},${value}"
+                        module.setProperty(key, newValue)
+                    }
+                    break
+            }
+        }
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        return module.size() > 0
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream os, boolean preserveFileTimestamps) {
+        ZipEntry entry = new ZipEntry(GROOVY_EXTENSION_MODULE_DESCRIPTOR_PATH)
+        entry.time = TransformerContext.getEntryTimestamp(preserveFileTimestamps, entry.time)
+        os.putNextEntry(entry)
+        Utils.copyLarge(toInputStream(module), os)
+        os.closeEntry()
+    }
+
+    private static InputStream toInputStream(Properties props) {
+        def baos = new ByteArrayOutputStream()
+        props.store(baos, null)
+        return new ByteArrayInputStream(baos.toByteArray())
+    }
+
+    private handle(String key, String value, Closure mergeValue) {
+        def existingValue = module.getProperty(key)
+        if (existingValue) {
+            mergeValue(existingValue)
+        } else {
+            module.setProperty(key, value)
+        }
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/IncludeResourceTransformer.groovy

@@ -0,0 +1,42 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.internal.Utils
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+/**
+ * A resource processor that allows the addition of an arbitrary file content into the shaded JAR.
+ * Modified from org.apache.maven.plugins.shade.resource.IncludeResourceTransformer
+ */
+class IncludeResourceTransformer implements Transformer {
+
+    File file
+
+    String resource
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        return false
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        // no op
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        return file != null ? file.exists() : false
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream outputStream, boolean preserveFileTimestamps) {
+        ZipEntry entry = new ZipEntry(resource)
+        entry.time = TransformerContext.getEntryTimestamp(preserveFileTimestamps, entry.time)
+        outputStream.putNextEntry(entry)
+        InputStream is = new FileInputStream(file)
+        Utils.copyLarge(is, outputStream)
+        is.close()
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/ManifestResourceTransformer.groovy

@@ -0,0 +1,78 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+import java.util.jar.*
+import java.util.jar.Attributes.Name
+
+/**
+ * A resource processor that allows the arbitrary addition of attributes to
+ * the first MANIFEST.MF that is found in the set of JARs being processed, or
+ * to a newly created manifest for the shaded JAR.
+ * Modified from org.apache.maven.plugins.shade.resource.ManifestResourceTransformer
+ */
+class ManifestResourceTransformer implements Transformer {
+
+    private String mainClass
+
+    private Map<String, Attributes> manifestEntries
+
+    private boolean manifestDiscovered
+
+    private Manifest manifest
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        def path = element.relativePath.pathString
+        if (JarFile.MANIFEST_NAME.equalsIgnoreCase(path)) {
+            return true
+        }
+        return false
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        if (!manifestDiscovered) {
+            manifest = new Manifest(context.inputStream)
+            manifestDiscovered = true
+            if (context.inputStream) {
+                context.inputStream.close()
+            }
+        }
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        true
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream os, boolean preserveFileTimestamps) {
+        if (manifest == null) {
+            manifest = new Manifest()
+        }
+        Attributes attributes = manifest.getMainAttributes()
+        if (mainClass != null) {
+            attributes.put(Name.MAIN_CLASS, mainClass)
+        }
+        if (manifestEntries != null) {
+            for (Map.Entry<String, Attributes> entry : manifestEntries.entrySet()) {
+                attributes.put(new Name(entry.getKey()), entry.getValue())
+            }
+        }
+        ZipEntry entry = new ZipEntry(JarFile.MANIFEST_NAME)
+        entry.time = TransformerContext.getEntryTimestamp(preserveFileTimestamps, entry.time)
+        os.putNextEntry(entry)
+        manifest.write(os)
+    }
+
+    ManifestResourceTransformer attributes(Map<String, ?> attributes) {
+        if (manifestEntries == null) {
+            manifestEntries = [:]
+        }
+        manifestEntries.putAll(attributes)
+        this
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/PropertiesFileTransformer.groovy

@@ -0,0 +1,220 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.internal.Utils
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+import static groovy.lang.Closure.IDENTITY
+
+/**
+ * Resources transformer that merges Properties files.
+ *
+ * <p>The default merge strategy discards duplicate values coming from additional
+ * resources. This behavior can be changed by setting a value for the <tt>mergeStrategy</tt>
+ * property, such as 'first' (default), 'latest' or 'append'. If the merge strategy is
+ * 'latest' then the last value of a matching property entry will be used. If the
+ * merge strategy is 'append' then the property values will be combined, using a
+ * merge separator (default value is ','). The merge separator can be changed by
+ * setting a value for the <tt>mergeSeparator</tt> property.</p>
+ *
+ * Say there are two properties files A and B with the
+ * following entries:
+ *
+ * <strong>A</strong>
+ * <ul>
+ *   <li>key1 = value1</li>
+ *   <li>key2 = value2</li>
+ * </ul>
+ *
+ * <strong>B</strong>
+ * <ul>
+ *   <li>key2 = balue2</li>
+ *   <li>key3 = value3</li>
+ * </ul>
+ *
+ * With <tt>mergeStrategy = first</tt> you get
+ *
+ * <strong>C</strong>
+ * <ul>
+ *   <li>key1 = value1</li>
+ *   <li>key2 = value2</li>
+ *   <li>key3 = value3</li>
+ * </ul>
+ *
+ * With <tt>mergeStrategy = latest</tt> you get
+ *
+ * <strong>C</strong>
+ * <ul>
+ *   <li>key1 = value1</li>
+ *   <li>key2 = balue2</li>
+ *   <li>key3 = value3</li>
+ * </ul>
+ *
+ * With <tt>mergeStrategy = append</tt> and <tt>mergeSparator = ;</tt> you get
+ *
+ * <strong>C</strong>
+ * <ul>
+ *   <li>key1 = value1</li>
+ *   <li>key2 = value2;balue2</li>
+ *   <li>key3 = value3</li>
+ * </ul>
+ *
+ * <p>There are three additional properties that can be set: <tt>paths</tt>, <tt>mappings</tt>,
+ * and <tt>keyTransformer</tt>.
+ * The first contains a list of strings or regexes that will be used to determine if
+ * a path should be transformed or not. The merge strategy and merge separator are
+ * taken from the global settings.</p>
+ *
+ * <p>The <tt>mappings</tt> property allows you to define merge strategy and separator per
+ * path</p>. If either <tt>paths</tt> or <tt>mappings</tt> is defined then no other path
+ * entries will be merged. <tt>mappings</tt> has precedence over <tt>paths</tt> if both
+ * are defined.</p>
+ *
+ * <p>If you need to transform keys in properties files, e.g. because they contain class
+ * names about to be relocated, you can set the <tt>keyTransformer</tt> property to a
+ * closure that receives the original key and returns the key name to be used.</p>
+ *
+ * <p>Example:</p>
+ * <pre>
+ * import org.codehaus.griffon.gradle.shadow.transformers.*
+ * shadowJar {
+ *     transform(PropertiesFileTransformer) {
+ *         paths = [
+ *             'META-INF/editors/java.beans.PropertyEditor'
+ *         ]
+ *         keyTransformer = { key ->
+ *             key.replaceAll('^(orig\.package\..*)$', 'new.prefix.$1')
+ *         }
+ *     }
+ * }
+ * </pre>
+ */
+class PropertiesFileTransformer implements Transformer {
+
+    private static final String PROPERTIES_SUFFIX = '.properties'
+
+    Map<String, Properties> propertiesEntries = [:]
+
+    List<String> paths = []
+
+    Map<String, Map<String, String>> mappings = [:]
+
+    String mergeStrategy = 'first'
+
+    String mergeSeparator = ','
+
+    Closure<String> keyTransformer = IDENTITY
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        def path = element.relativePath.pathString
+        if (mappings.containsKey(path)) {
+            return true
+        }
+        for (key in mappings.keySet()) {
+            if (path =~ /$key/) {
+                return true
+            }
+        }
+        if (path in paths) {
+            return true
+        }
+        for (p in paths) {
+            if (path =~ /$p/) {
+                return true
+            }
+        }
+        !mappings && !paths && path.endsWith(PROPERTIES_SUFFIX)
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        Properties props = propertiesEntries[context.path]
+        Properties incoming = loadAndTransformKeys(context.inputStream)
+        if (props == null) {
+            propertiesEntries[context.path] = incoming
+        } else {
+            incoming.each { key, value ->
+                if (props.containsKey(key)) {
+                    switch (mergeStrategyFor(context.path).toLowerCase()) {
+                        case 'latest':
+                            props.put(key, value)
+                            break
+                        case 'append':
+                            props.put(key, props.getProperty(key as String) + mergeSeparatorFor(context.path) + value)
+                            break
+                        case 'first':
+                            break
+                        default:
+                            break
+                    }
+                } else {
+                    props.put(key, value)
+                }
+            }
+        }
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        propertiesEntries.size() > 0
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream os, boolean preserveFileTimestamps) {
+        propertiesEntries.each { String path, Properties props ->
+            ZipEntry entry = new ZipEntry(path)
+            entry.time = TransformerContext.getEntryTimestamp(preserveFileTimestamps, entry.time)
+            os.putNextEntry(entry)
+            Utils.copyLarge(toInputStream(props), os)
+            os.closeEntry()
+        }
+    }
+
+    private Properties loadAndTransformKeys(InputStream is) {
+        Properties props = new Properties()
+        props.load(is)
+        transformKeys(props)
+    }
+
+    private Properties transformKeys(Properties properties) {
+        if (keyTransformer == IDENTITY)
+            return properties
+        def result = new Properties()
+        properties.each { key, value ->
+            result.put(keyTransformer.call(key), value)
+        }
+        result
+    }
+
+    private String mergeStrategyFor(String path) {
+        if (mappings.containsKey(path)) {
+            return mappings.get(path).mergeStrategy ?: mergeStrategy
+        }
+        for (key in mappings.keySet()) {
+            if (path =~ /$key/) {
+                return mappings.get(key).mergeStrategy ?: mergeStrategy
+            }
+        }
+        mergeStrategy
+    }
+
+    private String mergeSeparatorFor(String path) {
+        if (mappings.containsKey(path)) {
+            return mappings.get(path).mergeSeparator ?: mergeSeparator
+        }
+        for (key in mappings.keySet()) {
+            if (path =~ /$key/) {
+                return mappings.get(key).mergeSeparator ?: mergeSeparator
+            }
+        }
+        mergeSeparator
+    }
+
+    private static InputStream toInputStream(Properties props) {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream()
+        props.store(baos, '')
+        new ByteArrayInputStream(baos.toByteArray())
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/ServiceFileTransformer.groovy

@@ -0,0 +1,145 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.xbib.gradle.plugin.shadow.internal.ServiceStream
+import org.xbib.gradle.plugin.shadow.internal.Utils
+import org.xbib.gradle.plugin.shadow.relocation.RelocateClassContext
+import org.gradle.api.file.FileTreeElement
+import org.gradle.api.specs.Spec
+import org.gradle.api.tasks.util.PatternFilterable
+import org.gradle.api.tasks.util.PatternSet
+import org.xbib.gradle.plugin.shadow.zip.ZipEntry
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+/**
+ * Modified from org.apache.maven.plugins.shade.resource.ServiceResourceTransformer.java
+ * Resources transformer that appends entries in META-INF/services resources into
+ * a single resource. For example, if there are several META-INF/services/org.apache.maven.project.ProjectBuilder
+ * resources spread across many JARs the individual entries will all be concatenated into a single
+ * META-INF/services/org.apache.maven.project.ProjectBuilder resource packaged into the resultant JAR produced
+ * by the shading process.
+ */
+class ServiceFileTransformer implements Transformer, PatternFilterable {
+
+    private static final String SERVICES_PATTERN = "META-INF/services/**"
+
+    private static final String GROOVY_EXTENSION_MODULE_DESCRIPTOR_PATTERN =
+            "META-INF/services/org.codehaus.groovy.runtime.ExtensionModule"
+
+    Map<String, ServiceStream> serviceEntries = [:].withDefault { new ServiceStream() }
+
+    private final PatternSet patternSet =
+            new PatternSet().include(SERVICES_PATTERN).exclude(GROOVY_EXTENSION_MODULE_DESCRIPTOR_PATTERN)
+
+    void setPath(String path) {
+        patternSet.setIncludes(["${path}/**"])
+    }
+
+    @Override
+    boolean canTransformResource(FileTreeElement element) {
+        return patternSet.asSpec.isSatisfiedBy(element)
+    }
+
+    @Override
+    void transform(TransformerContext context) {
+        def lines = context.inputStream.readLines()
+        def targetPath = context.path
+        context.relocators.each {rel ->
+            if(rel.canRelocateClass(RelocateClassContext.builder().className(new File(targetPath).name).stats(context.stats).build())) {
+                targetPath = rel.relocateClass(RelocateClassContext.builder().className(targetPath).stats(context.stats).build())
+            }
+            lines.eachWithIndex { String line, int i ->
+                def lineContext = RelocateClassContext.builder().className(line).stats(context.stats).build()
+                if(rel.canRelocateClass(lineContext)) {
+                    lines[i] = rel.relocateClass(lineContext)
+                }
+            }
+        }
+        lines.each {line -> serviceEntries[targetPath].append(new ByteArrayInputStream(line.getBytes()))}
+    }
+
+    @Override
+    boolean hasTransformedResource() {
+        return serviceEntries.size() > 0
+    }
+
+    @Override
+    void modifyOutputStream(ZipOutputStream os, boolean preserveFileTimestamps) {
+        serviceEntries.each { String path, ServiceStream stream ->
+            ZipEntry entry = new ZipEntry(path)
+            entry.time = TransformerContext.getEntryTimestamp(preserveFileTimestamps, entry.time)
+            os.putNextEntry(entry)
+            Utils.copyLarge(stream.toInputStream(), os)
+            os.closeEntry()
+        }
+    }
+
+    @Override
+    ServiceFileTransformer include(String... includes) {
+        patternSet.include(includes)
+        this
+    }
+
+    @Override
+    ServiceFileTransformer include(Iterable<String> includes) {
+        patternSet.include(includes)
+        this
+    }
+
+    @Override
+    ServiceFileTransformer include(Spec<FileTreeElement> includeSpec) {
+        patternSet.include(includeSpec)
+        this
+    }
+
+    @Override
+    ServiceFileTransformer include(Closure includeSpec) {
+        patternSet.include(includeSpec)
+        this
+    }
+
+    @Override
+    ServiceFileTransformer exclude(String... excludes) {
+        patternSet.exclude(excludes)
+        this
+    }
+
+    @Override
+    ServiceFileTransformer exclude(Iterable<String> excludes) {
+        patternSet.exclude(excludes)
+        this
+    }
+
+    @Override
+    ServiceFileTransformer exclude(Spec<FileTreeElement> excludeSpec) {
+        patternSet.exclude(excludeSpec)
+        this
+    }
+
+    @Override
+    ServiceFileTransformer exclude(Closure excludeSpec) {
+        patternSet.exclude(excludeSpec)
+        this
+    }
+
+    @Override
+    Set<String> getIncludes() {
+        patternSet.includes
+    }
+
+    @Override
+    ServiceFileTransformer setIncludes(Iterable<String> includes) {
+        patternSet.includes = includes
+        this
+    }
+
+    @Override
+    Set<String> getExcludes() {
+        patternSet.excludes
+    }
+
+    @Override
+    ServiceFileTransformer setExcludes(Iterable<String> excludes) {
+        patternSet.excludes = excludes
+        this
+    }
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/Transformer.groovy

@@ -0,0 +1,18 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import org.gradle.api.file.FileTreeElement
+import org.xbib.gradle.plugin.shadow.zip.ZipOutputStream
+
+/**
+ * Modified from org.apache.maven.plugins.shade.resource.ResourceTransformer.
+ */
+interface Transformer {
+
+    boolean canTransformResource(FileTreeElement element)
+
+    void transform(TransformerContext context)
+
+    boolean hasTransformedResource()
+
+    void modifyOutputStream(ZipOutputStream jos, boolean preserveFileTimestamps)
+}

gradle-plugin-shadow/src/main/groovy/org/xbib/gradle/plugin/shadow/transformers/TransformerContext.groovy

@@ -0,0 +1,24 @@
+package org.xbib.gradle.plugin.shadow.transformers
+
+import groovy.transform.Canonical
+import groovy.transform.builder.Builder
+import org.xbib.gradle.plugin.shadow.ShadowStats
+import org.xbib.gradle.plugin.shadow.relocation.Relocator
+import org.xbib.gradle.plugin.shadow.tasks.ShadowCopyAction
+
+@Canonical
+@Builder
+class TransformerContext {
+
+    String path
+
+    InputStream inputStream
+
+    List<Relocator> relocators
+
+    ShadowStats stats
+
+    static long getEntryTimestamp(boolean preserveFileTimestamps, long entryTime) {
+        preserveFileTimestamps ? entryTime : ShadowCopyAction.CONSTANT_TIME_FOR_ZIP_ENTRIES
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/internal/ServiceStream.java

@@ -0,0 +1,28 @@
+package org.xbib.gradle.plugin.shadow.internal;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * This class was moved to java because groovy compiler reports "no such property: count"
+ */
+public class ServiceStream extends ByteArrayOutputStream {
+
+    public ServiceStream() {
+        super(1024);
+    }
+
+    public void append(InputStream is) throws IOException {
+        if (count > 0 && buf[count - 1] != '\n' && buf[count - 1] != '\r') {
+            byte[] newline = new byte[] {'\n'};
+            write(newline, 0, newline.length);
+        }
+        is.transferTo(this);
+    }
+
+    public InputStream toInputStream() {
+        return new ByteArrayInputStream(buf, 0, count);
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/AbstractUnicodeExtraField.java

@@ -0,0 +1,159 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.nio.charset.StandardCharsets;
+import java.util.zip.CRC32;
+import java.util.zip.ZipException;
+
+/**
+ * A common base class for Unicode extra information extra fields.
+ */
+public abstract class AbstractUnicodeExtraField implements ZipExtraField {
+    private long nameCRC32;
+    private byte[] unicodeName;
+    private byte[] data;
+
+    protected AbstractUnicodeExtraField() {
+    }
+
+    /**
+     * Assemble as unicode extension from the name/comment and
+     * encoding of the original zip entry.
+     *
+     * @param text The file name or comment.
+     * @param bytes The encoded of the filename or comment in the zip
+     * file.
+     * @param off The offset of the encoded filename or comment in
+     * <code>bytes</code>.
+     * @param len The length of the encoded filename or comment in
+     * <code>bytes</code>.
+     */
+    protected AbstractUnicodeExtraField(final String text, final byte[] bytes, final int off,
+                                        final int len) {
+        final CRC32 crc32 = new CRC32();
+        crc32.update(bytes, off, len);
+        nameCRC32 = crc32.getValue();
+
+        unicodeName = text.getBytes(StandardCharsets.UTF_8);
+    }
+
+    /**
+     * Assemble as unicode extension from the name/comment and
+     * encoding of the original zip entry.
+     *
+     * @param text The file name or comment.
+     * @param bytes The encoded of the filename or comment in the zip
+     * file.
+     */
+    protected AbstractUnicodeExtraField(final String text, final byte[] bytes) {
+
+        this(text, bytes, 0, bytes.length);
+    }
+
+    private void assembleData() {
+        if (unicodeName == null) {
+            return;
+        }
+
+        data = new byte[5 + unicodeName.length];
+        // version 1
+        data[0] = 0x01;
+        System.arraycopy(ZipLong.getBytes(nameCRC32), 0, data, 1, 4);
+        System.arraycopy(unicodeName, 0, data, 5, unicodeName.length);
+    }
+
+    /**
+     * @return The CRC32 checksum of the filename or comment as
+     *         encoded in the central directory of the zip file.
+     */
+    public long getNameCRC32() {
+        return nameCRC32;
+    }
+
+    /**
+     * @param nameCRC32 The CRC32 checksum of the filename as encoded
+     *         in the central directory of the zip file to set.
+     */
+    public void setNameCRC32(final long nameCRC32) {
+        this.nameCRC32 = nameCRC32;
+        data = null;
+    }
+
+    /**
+     * @return The utf-8 encoded name.
+     */
+    public byte[] getUnicodeName() {
+        byte[] b = null;
+        if (unicodeName != null) {
+            b = new byte[unicodeName.length];
+            System.arraycopy(unicodeName, 0, b, 0, b.length);
+        }
+        return b;
+    }
+
+    /**
+     * @param unicodeName The utf-8 encoded name to set.
+     */
+    public void setUnicodeName(final byte[] unicodeName) {
+        if (unicodeName != null) {
+            this.unicodeName = new byte[unicodeName.length];
+            System.arraycopy(unicodeName, 0, this.unicodeName, 0,
+                             unicodeName.length);
+        } else {
+            this.unicodeName = null;
+        }
+        data = null;
+    }
+
+    /** {@inheritDoc} */
+    public byte[] getCentralDirectoryData() {
+        if (data == null) {
+            this.assembleData();
+        }
+        byte[] b = null;
+        if (data != null) {
+            b = new byte[data.length];
+            System.arraycopy(data, 0, b, 0, b.length);
+        }
+        return b;
+    }
+
+    /** {@inheritDoc} */
+    public ZipShort getCentralDirectoryLength() {
+        if (data == null) {
+            assembleData();
+        }
+        return new ZipShort(data.length);
+    }
+
+    /** {@inheritDoc} */
+    public byte[] getLocalFileDataData() {
+        return getCentralDirectoryData();
+    }
+
+    /** {@inheritDoc} */
+    public ZipShort getLocalFileDataLength() {
+        return getCentralDirectoryLength();
+    }
+
+    /** {@inheritDoc} */
+    public void parseFromLocalFileData(final byte[] buffer, final int offset, final int length)
+        throws ZipException {
+
+        if (length < 5) {
+            throw new ZipException("UniCode path extra data must have at least"
+                                   + " 5 bytes.");
+        }
+
+        final int version = buffer[offset];
+
+        if (version != 0x01) {
+            throw new ZipException("Unsupported version [" + version
+                                   + "] for UniCode path extra data.");
+        }
+
+        nameCRC32 = ZipLong.getValue(buffer, offset + 1);
+        unicodeName = new byte[length - 5];
+        System.arraycopy(buffer, offset + 5, unicodeName, 0, length - 5);
+        data = null;
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/AsiExtraField.java

@@ -0,0 +1,299 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.util.zip.CRC32;
+import java.util.zip.ZipException;
+
+/**
+ * Adds Unix file permission and UID/GID fields as well as symbolic
+ * link handling.
+ *
+ * <p>This class uses the ASi extra field in the format:</p>
+ * <pre>
+ *         Value         Size            Description
+ *         -----         ----            -----------
+ * (Unix3) 0x756e        Short           tag for this extra block type
+ *         TSize         Short           total data size for this block
+ *         CRC           Long            CRC-32 of the remaining data
+ *         Mode          Short           file permissions
+ *         SizDev        Long            symlink'd size OR major/minor dev num
+ *         UID           Short           user ID
+ *         GID           Short           group ID
+ *         (var.)        variable        symbolic link filename
+ * </pre>
+ * taken from appnote.iz (Info-ZIP note, 981119) found at <a
+ * href="ftp://ftp.uu.net/pub/archiving/zip/doc/">ftp://ftp.uu.net/pub/archiving/zip/doc/</a>
+
+ *
+ * <p>Short is two bytes and Long is four bytes in big endian byte and
+ * word order, device numbers are currently not supported.</p>
+ *
+ * <p>Since the documentation this class is based upon doesn't mention
+ * the character encoding of the file name at all, it is assumed that
+ * it uses the current platform's default encoding.</p>
+ */
+public class AsiExtraField implements ZipExtraField, UnixStat, Cloneable {
+
+    private static final ZipShort HEADER_ID = new ZipShort(0x756E);
+    private static final int      WORD = 4;
+    /**
+     * Standard Unix stat(2) file mode.
+     */
+    private int mode = 0;
+    /**
+     * User ID.
+     */
+    private int uid = 0;
+    /**
+     * Group ID.
+     */
+    private int gid = 0;
+    /**
+     * File this entry points to, if it is a symbolic link.
+     *
+     * <p>empty string - if entry is not a symbolic link.</p>
+     */
+    private String link = "";
+    /**
+     * Is this an entry for a directory?
+     */
+    private boolean dirFlag = false;
+
+    /**
+     * Instance used to calculate checksums.
+     */
+    private CRC32 crc = new CRC32();
+
+    /** Constructor for AsiExtraField. */
+    public AsiExtraField() {
+    }
+
+    /**
+     * The Header-ID.
+     * @return the value for the header id for this extrafield
+     */
+    public ZipShort getHeaderId() {
+        return HEADER_ID;
+    }
+
+    /**
+     * Length of the extra field in the local file data - without
+     * Header-ID or length specifier.
+     * @return a <code>ZipShort</code> for the length of the data of this extra field
+     */
+    public ZipShort getLocalFileDataLength() {
+        return new ZipShort(WORD         // CRC
+                          + 2         // Mode
+                          + WORD         // SizDev
+                          + 2         // UID
+                          + 2         // GID
+                          + getLinkedFile().getBytes().length);
+                          // Uses default charset - see class Javadoc
+    }
+
+    /**
+     * Delegate to local file data.
+     * @return the centralDirectory length
+     */
+    public ZipShort getCentralDirectoryLength() {
+        return getLocalFileDataLength();
+    }
+
+    /**
+     * The actual data to put into local file data - without Header-ID
+     * or length specifier.
+     * @return get the data
+     */
+    public byte[] getLocalFileDataData() {
+        // CRC will be added later
+        byte[] data = new byte[getLocalFileDataLength().getValue() - WORD];
+        System.arraycopy(ZipShort.getBytes(getMode()), 0, data, 0, 2);
+
+        byte[] linkArray = getLinkedFile().getBytes(); // Uses default charset - see class Javadoc
+        System.arraycopy(ZipLong.getBytes(linkArray.length),
+                         0, data, 2, WORD);
+
+        System.arraycopy(ZipShort.getBytes(getUserId()),
+                         0, data, 6, 2);
+        System.arraycopy(ZipShort.getBytes(getGroupId()),
+                         0, data, 8, 2);
+
+        System.arraycopy(linkArray, 0, data, 10, linkArray.length);
+
+        crc.reset();
+        crc.update(data);
+        long checksum = crc.getValue();
+
+        byte[] result = new byte[data.length + WORD];
+        System.arraycopy(ZipLong.getBytes(checksum), 0, result, 0, WORD);
+        System.arraycopy(data, 0, result, WORD, data.length);
+        return result;
+    }
+
+    /**
+     * Delegate to local file data.
+     * @return the local file data
+     */
+    public byte[] getCentralDirectoryData() {
+        return getLocalFileDataData();
+    }
+
+    /**
+     * Set the user id.
+     * @param uid the user id
+     */
+    public void setUserId(int uid) {
+        this.uid = uid;
+    }
+
+    /**
+     * Get the user id.
+     * @return the user id
+     */
+    public int getUserId() {
+        return uid;
+    }
+
+    /**
+     * Set the group id.
+     * @param gid the group id
+     */
+    public void setGroupId(int gid) {
+        this.gid = gid;
+    }
+
+    /**
+     * Get the group id.
+     * @return the group id
+     */
+    public int getGroupId() {
+        return gid;
+    }
+
+    /**
+     * Indicate that this entry is a symbolic link to the given filename.
+     *
+     * @param name Name of the file this entry links to, empty String
+     *             if it is not a symbolic link.
+     *
+     */
+    public void setLinkedFile(String name) {
+        link = name;
+        mode = getMode(mode);
+    }
+
+    /**
+     * Name of linked file
+     *
+     * @return name of the file this entry links to if it is a
+     *         symbolic link, the empty string otherwise.
+     */
+    public String getLinkedFile() {
+        return link;
+    }
+
+    /**
+     * Is this entry a symbolic link?
+     * @return true if this is a symbolic link
+     */
+    public boolean isLink() {
+        return !getLinkedFile().isEmpty();
+    }
+
+    /**
+     * File mode of this file.
+     * @param mode the file mode
+     */
+    public void setMode(int mode) {
+        this.mode = getMode(mode);
+    }
+
+    /**
+     * File mode of this file.
+     * @return the file mode
+     */
+    public int getMode() {
+        return mode;
+    }
+
+    /**
+     * Indicate whether this entry is a directory.
+     * @param dirFlag if true, this entry is a directory
+     */
+    public void setDirectory(boolean dirFlag) {
+        this.dirFlag = dirFlag;
+        mode = getMode(mode);
+    }
+
+    /**
+     * Is this entry a directory?
+     * @return true if this entry is a directory
+     */
+    public boolean isDirectory() {
+        return dirFlag && !isLink();
+    }
+
+    /**
+     * Populate data from this array as if it was in local file data.
+     * @param data an array of bytes
+     * @param offset the start offset
+     * @param length the number of bytes in the array from offset
+     * @throws ZipException on error
+     */
+    public void parseFromLocalFileData(byte[] data, int offset, int length)
+        throws ZipException {
+
+        long givenChecksum = ZipLong.getValue(data, offset);
+        byte[] tmp = new byte[length - WORD];
+        System.arraycopy(data, offset + WORD, tmp, 0, length - WORD);
+        crc.reset();
+        crc.update(tmp);
+        long realChecksum = crc.getValue();
+        if (givenChecksum != realChecksum) {
+            throw new ZipException("bad CRC checksum "
+                                   + Long.toHexString(givenChecksum)
+                                   + " instead of "
+                                   + Long.toHexString(realChecksum));
+        }
+
+        int newMode = ZipShort.getValue(tmp, 0);
+        byte[] linkArray = new byte[(int) ZipLong.getValue(tmp, 2)];
+        uid = ZipShort.getValue(tmp, 6);
+        gid = ZipShort.getValue(tmp, 8);
+
+        if (linkArray.length == 0) {
+            link = "";
+        } else {
+            System.arraycopy(tmp, 10, linkArray, 0, linkArray.length);
+            link = new String(linkArray); // Uses default charset - see class Javadoc
+        }
+        setDirectory((newMode & DIR_FLAG) != 0);
+        setMode(newMode);
+    }
+
+    /**
+     * Get the file mode for given permissions with the correct file type.
+     * @param mode the mode
+     * @return the type with the mode
+     */
+    protected int getMode(int mode) {
+        int type = FILE_FLAG;
+        if (isLink()) {
+            type = LINK_FLAG;
+        } else if (isDirectory()) {
+            type = DIR_FLAG;
+        }
+        return type | (mode & PERM_MASK);
+    }
+
+    @Override
+    public Object clone() {
+        try {
+            AsiExtraField cloned = (AsiExtraField) super.clone();
+            cloned.crc = new CRC32();
+            return cloned;
+        } catch (CloneNotSupportedException cnfe) {
+            // impossible
+            throw new RuntimeException(cnfe);
+        }
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/CentralDirectoryParsingZipExtraField.java

@@ -0,0 +1,20 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.util.zip.ZipException;
+
+/**
+ * {@link ZipExtraField ZipExtraField} that knows how to parse central
+ * directory data.
+ */
+public interface CentralDirectoryParsingZipExtraField extends ZipExtraField {
+    /**
+     * Populate data from this array as if it was in central directory data.
+     * @param data an array of bytes
+     * @param offset the start offset
+     * @param length the number of bytes in the array from offset
+     *
+     * @throws ZipException on error
+     */
+    void parseFromCentralDirectoryData(byte[] data, int offset, int length)
+        throws ZipException;
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/ExtraFieldUtils.java

@@ -0,0 +1,272 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.zip.ZipException;
+
+/**
+ * ZipExtraField related methods.
+ */
+public class ExtraFieldUtils {
+
+    private static final int WORD = 4;
+
+    /**
+     * Static registry of known extra fields.
+     */
+    private static final Map<ZipShort, Class<?>> implementations;
+
+    static {
+        implementations = new ConcurrentHashMap<>();
+        register(AsiExtraField.class);
+        register(JarMarker.class);
+        register(UnicodePathExtraField.class);
+        register(UnicodeCommentExtraField.class);
+        register(Zip64ExtendedInformationExtraField.class);
+    }
+
+    /**
+     * Register a ZipExtraField implementation.
+     *
+     * <p>The given class must have a no-arg constructor and implement
+     * the {@link ZipExtraField ZipExtraField interface}.</p>
+     * @param c the class to register
+     */
+    public static void register(Class<?> c) {
+        try {
+            ZipExtraField ze = (ZipExtraField) c.getDeclaredConstructor().newInstance();
+            implementations.put(ze.getHeaderId(), c);
+        } catch (ClassCastException | InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
+            throw new IllegalStateException("unable to initialize zip extra field implementation");
+        }
+    }
+
+    /**
+     * Create an instance of the appropriate ExtraField, falls back to
+     * {@link UnrecognizedExtraField UnrecognizedExtraField}.
+     * @param headerId the header identifier
+     * @return an instance of the appropriate ExtraField
+     * @exception InstantiationException if unable to instantiate the class
+     * @exception IllegalAccessException if not allowed to instantiate the class
+     */
+    public static ZipExtraField createExtraField(ZipShort headerId)
+            throws InstantiationException, IllegalAccessException, NoSuchMethodException, InvocationTargetException {
+        Class<?> c = implementations.get(headerId);
+        if (c != null) {
+            return (ZipExtraField) c.getDeclaredConstructor().newInstance();
+        }
+        UnrecognizedExtraField u = new UnrecognizedExtraField();
+        u.setHeaderId(headerId);
+        return u;
+    }
+
+    /**
+     * Split the array into ExtraFields and populate them with the
+     * given data as local file data, throwing an exception if the
+     * data cannot be parsed.
+     * @param data an array of bytes as it appears in local file data
+     * @return an array of ExtraFields
+     * @throws ZipException on error
+     */
+    public static ZipExtraField[] parse(byte[] data) throws ZipException {
+        return parse(data, true, UnparseableExtraField.THROW);
+    }
+
+    /**
+     * Split the array into ExtraFields and populate them with the
+     * given data, throwing an exception if the data cannot be parsed.
+     * @param data an array of bytes
+     * @param local whether data originates from the local file data
+     * or the central directory
+     * @return an array of ExtraFields
+     * @throws ZipException on error
+     */
+    public static ZipExtraField[] parse(byte[] data, boolean local)
+        throws ZipException {
+        return parse(data, local, UnparseableExtraField.THROW);
+    }
+
+    /**
+     * Split the array into ExtraFields and populate them with the
+     * given data.
+     * @param data an array of bytes
+     * @param local whether data originates from the local file data
+     * or the central directory
+     * @param onUnparseableData what to do if the extra field data
+     * cannot be parsed.
+     * @return an array of ExtraFields
+     * @throws ZipException on error
+     */
+    public static ZipExtraField[] parse(byte[] data, boolean local,
+                                        UnparseableExtraField onUnparseableData)
+        throws ZipException {
+        List<ZipExtraField> v = new ArrayList<>();
+        int start = 0;
+        LOOP:
+        while (start <= data.length - WORD) {
+            ZipShort headerId = new ZipShort(data, start);
+            int length = (new ZipShort(data, start + 2)).getValue();
+            if (start + WORD + length > data.length) {
+                switch (onUnparseableData.getKey()) {
+                    case UnparseableExtraField.THROW_KEY:
+                        throw new ZipException("bad extra field starting at "
+                                + start + ".  Block length of " + length
+                                + " bytes exceeds remaining data of "
+                                + (data.length - start - WORD) + " bytes.");
+                    case UnparseableExtraField.READ_KEY:
+                        UnparseableExtraFieldData field = new UnparseableExtraFieldData();
+                        if (local) {
+                            field.parseFromLocalFileData(data, start, data.length - start);
+                        } else {
+                            field.parseFromCentralDirectoryData(data, start, data.length - start);
+                        }
+                        v.add(field);
+                        //$FALL-THROUGH$
+                    case UnparseableExtraField.SKIP_KEY:
+                        // since we cannot parse the data we must assume
+                        // the extra field consumes the whole rest of the
+                        // available data
+                        break LOOP;
+                    default:
+                        throw new ZipException("unknown UnparseableExtraField key: "
+                                + onUnparseableData.getKey());
+                }
+            }
+            try {
+                ZipExtraField ze = createExtraField(headerId);
+                if (local || !(ze instanceof CentralDirectoryParsingZipExtraField)) {
+                    ze.parseFromLocalFileData(data, start + WORD, length);
+                } else {
+                    ((CentralDirectoryParsingZipExtraField) ze)
+                        .parseFromCentralDirectoryData(data, start + WORD, length);
+                }
+                v.add(ze);
+            } catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException ie) {
+                throw new ZipException(ie.getMessage());
+            }
+            start += (length + WORD);
+        }
+
+        ZipExtraField[] result = new ZipExtraField[v.size()];
+        return v.toArray(result);
+    }
+
+    /**
+     * Merges the local file data fields of the given ZipExtraFields.
+     * @param data an array of ExtraFiles
+     * @return an array of bytes
+     */
+    public static byte[] mergeLocalFileDataData(ZipExtraField[] data) {
+        final boolean lastIsUnparseableHolder = data.length > 0
+                && data[data.length - 1] instanceof UnparseableExtraFieldData;
+        int regularExtraFieldCount = lastIsUnparseableHolder ? data.length - 1 : data.length;
+
+        int sum = WORD * regularExtraFieldCount;
+        for (ZipExtraField element : data) {
+            sum += element.getLocalFileDataLength().getValue();
+        }
+
+        byte[] result = new byte[sum];
+        int start = 0;
+        for (int i = 0; i < regularExtraFieldCount; i++) {
+            System.arraycopy(data[i].getHeaderId().getBytes(),
+                    0, result, start, 2);
+            System.arraycopy(data[i].getLocalFileDataLength().getBytes(),
+                    0, result, start + 2, 2);
+            byte[] local = data[i].getLocalFileDataData();
+            System.arraycopy(local, 0, result, start + WORD, local.length);
+            start += (local.length + WORD);
+        }
+        if (lastIsUnparseableHolder) {
+            byte[] local = data[data.length - 1].getLocalFileDataData();
+            System.arraycopy(local, 0, result, start, local.length);
+        }
+        return result;
+    }
+
+    /**
+     * Merges the central directory fields of the given ZipExtraFields.
+     * @param data an array of ExtraFields
+     * @return an array of bytes
+     */
+    public static byte[] mergeCentralDirectoryData(ZipExtraField[] data) {
+        final boolean lastIsUnparseableHolder = data.length > 0
+            && data[data.length - 1] instanceof UnparseableExtraFieldData;
+        int regularExtraFieldCount = lastIsUnparseableHolder ? data.length - 1 : data.length;
+
+        int sum = WORD * regularExtraFieldCount;
+        for (ZipExtraField element : data) {
+            sum += element.getCentralDirectoryLength().getValue();
+        }
+        byte[] result = new byte[sum];
+        int start = 0;
+        for (int i = 0; i < regularExtraFieldCount; i++) {
+            System.arraycopy(data[i].getHeaderId().getBytes(),
+                             0, result, start, 2);
+            System.arraycopy(data[i].getCentralDirectoryLength().getBytes(),
+                             0, result, start + 2, 2);
+            byte[] local = data[i].getCentralDirectoryData();
+            System.arraycopy(local, 0, result, start + WORD, local.length);
+            start += (local.length + WORD);
+        }
+        if (lastIsUnparseableHolder) {
+            byte[] local = data[data.length - 1].getCentralDirectoryData();
+            System.arraycopy(local, 0, result, start, local.length);
+        }
+        return result;
+    }
+
+    /**
+     * "enum" for the possible actions to take if the extra field
+     * cannot be parsed.
+     */
+    public static final class UnparseableExtraField {
+        /**
+         * Key for "throw an exception" action.
+         */
+        public static final int THROW_KEY = 0;
+        /**
+         * Key for "skip" action.
+         */
+        public static final int SKIP_KEY = 1;
+        /**
+         * Key for "read" action.
+         */
+        public static final int READ_KEY = 2;
+
+        /**
+         * Throw an exception if field cannot be parsed.
+         */
+        public static final UnparseableExtraField THROW = new UnparseableExtraField(THROW_KEY);
+
+        /**
+         * Skip the extra field entirely and don't make its data
+         * available - effectively removing the extra field data.
+         */
+        public static final UnparseableExtraField SKIP = new UnparseableExtraField(SKIP_KEY);
+
+        /**
+         * Read the extra field data into an instance of {@link
+         * UnparseableExtraFieldData UnparseableExtraFieldData}.
+         */
+        public static final UnparseableExtraField READ = new UnparseableExtraField(READ_KEY);
+
+        private final int key;
+
+        private UnparseableExtraField(int k) {
+            key = k;
+        }
+
+        /**
+         * Key of the action to take.
+         *
+         * @return int
+         */
+        public int getKey() {
+            return key;
+        }
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/FallbackZipEncoding.java

@@ -0,0 +1,72 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+/**
+ * A fallback ZipEncoding, which uses a java.io means to encode names.
+ *
+ * <p>This implementation is not favorable for encodings other than
+ * utf-8, because java.io encodes unmappable character as question
+ * marks leading to unreadable ZIP entries on some operating
+ * systems.</p>
+ *
+ * <p>Furthermore this implementation is unable to tell whether a
+ * given name can be safely encoded or not.</p>
+ *
+ * <p>This implementation acts as a last resort implementation, when
+ * neither {@link Simple8BitZipEncoding} nor {@link NioZipEncoding} is
+ * available.</p>
+ *
+ * <p>The methods of this class are reentrant.</p>
+ */
+class FallbackZipEncoding implements ZipEncoding {
+    private final String charset;
+
+    /**
+     * Construct a fallback zip encoding, which uses the platform's
+     * default charset.
+     */
+    public FallbackZipEncoding() {
+        this.charset = null;
+    }
+
+    /**
+     * Construct a fallback zip encoding, which uses the given charset.
+     *
+     * @param charset The name of the charset or {@code null} for
+     *                the platform's default character set.
+     */
+    public FallbackZipEncoding(final String charset) {
+        this.charset = charset;
+    }
+
+    /**
+     * @see ZipEncoding#canEncode(java.lang.String)
+     */
+    public boolean canEncode(final String name) {
+        return true;
+    }
+
+    /**
+     * @see ZipEncoding#encode(java.lang.String)
+     */
+    public ByteBuffer encode(final String name) throws IOException {
+        if (this.charset == null) { // i.e. use default charset, see no-args constructor
+            return ByteBuffer.wrap(name.getBytes());
+        } else {
+            return ByteBuffer.wrap(name.getBytes(this.charset));
+        }
+    }
+
+    /**
+     * @see ZipEncoding#decode(byte[])
+     */
+    public String decode(final byte[] data) throws IOException {
+        if (this.charset == null) { // i.e. use default charset, see no-args constructor
+            return new String(data);
+        } else {
+            return new String(data, this.charset);
+        }
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/GeneralPurposeBit.java

@@ -0,0 +1,193 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+/**
+ * Parser/encoder for the "general purpose bit" field in ZIP's local
+ * file and central directory headers.
+ */
+public final class GeneralPurposeBit implements Cloneable {
+    /**
+     * Indicates that the file is encrypted.
+     */
+    private static final int ENCRYPTION_FLAG = 1;
+
+    /**
+     * Indicates that a data descriptor stored after the file contents
+     * will hold CRC and size information.
+     */
+    private static final int DATA_DESCRIPTOR_FLAG = 1 << 3;
+
+    /**
+     * Indicates strong encryption.
+     */
+    private static final int STRONG_ENCRYPTION_FLAG = 1 << 6;
+
+    /**
+     * Indicates that filenames are written in utf-8.
+     *
+     * <p>The only reason this is public is that {@link
+     * ZipOutputStream#EFS_FLAG} was public in several versions of
+     * Apache Ant and we needed a substitute for it.</p>
+     */
+    public static final int UFT8_NAMES_FLAG = 1 << 11;
+
+    private boolean languageEncodingFlag = false;
+    private boolean dataDescriptorFlag = false;
+    private boolean encryptionFlag = false;
+    private boolean strongEncryptionFlag = false;
+
+    public GeneralPurposeBit() {
+    }
+
+    /**
+     * whether the current entry uses UTF8 for file name and comment.
+     *
+     * @return boolean
+     */
+    public boolean usesUTF8ForNames() {
+        return languageEncodingFlag;
+    }
+
+    /**
+     * whether the current entry will use UTF8 for file name and comment.
+     *
+     * @param b boolean
+     */
+    public void useUTF8ForNames(boolean b) {
+        languageEncodingFlag = b;
+    }
+
+    /**
+     * whether the current entry uses the data descriptor to store CRC
+     * and size information
+     *
+     * @return boolean
+     */
+    public boolean usesDataDescriptor() {
+        return dataDescriptorFlag;
+    }
+
+    /**
+     * whether the current entry will use the data descriptor to store
+     * CRC and size information
+     *
+     * @param b boolean
+     */
+    public void useDataDescriptor(boolean b) {
+        dataDescriptorFlag = b;
+    }
+
+    /**
+     * whether the current entry is encrypted
+     *
+     * @return boolean
+     */
+    public boolean usesEncryption() {
+        return encryptionFlag;
+    }
+
+    /**
+     * whether the current entry will be encrypted
+     *
+     * @param b boolean
+     */
+    public void useEncryption(boolean b) {
+        encryptionFlag = b;
+    }
+
+    /**
+     * whether the current entry is encrypted using strong encryption
+     *
+     * @return boolean
+     */
+    public boolean usesStrongEncryption() {
+        return encryptionFlag && strongEncryptionFlag;
+    }
+
+    /**
+     * whether the current entry will be encrypted  using strong encryption
+     *
+     * @param b boolean
+     */
+    public void useStrongEncryption(boolean b) {
+        strongEncryptionFlag = b;
+        if (b) {
+            useEncryption(true);
+        }
+    }
+
+    /**
+     * Encodes the set bits in a form suitable for ZIP archives.
+     *
+     * @return byte[]
+     */
+    public byte[] encode() {
+        byte[] result = new byte[2];
+        encode(result, 0);
+        return result;
+    }
+
+    /**
+     * Encodes the set bits in a form suitable for ZIP archives.
+     *
+     * @param buf the output buffer
+     * @param offset
+     *         The offset within the output buffer of the first byte to be written.
+     *         must be non-negative and no larger than <tt>buf.length-2</tt>
+     */
+    public void encode(byte[] buf, int offset) {
+        ZipShort.putShort((dataDescriptorFlag ? DATA_DESCRIPTOR_FLAG : 0)
+                          | (languageEncodingFlag ? UFT8_NAMES_FLAG : 0)
+                          | (encryptionFlag ? ENCRYPTION_FLAG : 0)
+                          | (strongEncryptionFlag ? STRONG_ENCRYPTION_FLAG : 0),
+                buf, offset);
+    }
+
+    /**
+     * Parses the supported flags from the given archive data.
+     *
+     * @param data local file header or a central directory entry.
+     * @param offset offset at which the general purpose bit starts
+     * @return GeneralPurposeBit
+     */
+    public static GeneralPurposeBit parse(final byte[] data, final int offset) {
+        final int generalPurposeFlag = ZipShort.getValue(data, offset);
+        GeneralPurposeBit b = new GeneralPurposeBit();
+        b.useDataDescriptor((generalPurposeFlag & DATA_DESCRIPTOR_FLAG) != 0);
+        b.useUTF8ForNames((generalPurposeFlag & UFT8_NAMES_FLAG) != 0);
+        b.useStrongEncryption((generalPurposeFlag & STRONG_ENCRYPTION_FLAG)
+                              != 0);
+        b.useEncryption((generalPurposeFlag & ENCRYPTION_FLAG) != 0);
+        return b;
+    }
+
+    @Override
+    public int hashCode() {
+        return 3 * (7 * (13 * (17 * (encryptionFlag ? 1 : 0)
+                               + (strongEncryptionFlag ? 1 : 0))
+                         + (languageEncodingFlag ? 1 : 0))
+                    + (dataDescriptorFlag ? 1 : 0));
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o instanceof GeneralPurposeBit) {
+            GeneralPurposeBit g = (GeneralPurposeBit) o;
+            return g.encryptionFlag == encryptionFlag
+                    && g.strongEncryptionFlag == strongEncryptionFlag
+                    && g.languageEncodingFlag == languageEncodingFlag
+                    && g.dataDescriptorFlag == dataDescriptorFlag;
+        }
+
+        return false;
+    }
+
+    @Override
+    public Object clone() {
+        try {
+            return super.clone();
+        } catch (CloneNotSupportedException ex) {
+            // impossible
+            throw new RuntimeException("GeneralPurposeBit is not Cloneable?", ex); //NOSONAR
+        }
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/JarMarker.java

@@ -0,0 +1,87 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.util.zip.ZipException;
+
+/**
+ * If this extra field is added as the very first extra field of the
+ * archive, Solaris will consider it an executable jar file.
+ */
+public final class JarMarker implements ZipExtraField {
+
+    private static final ZipShort ID = new ZipShort(0xCAFE);
+    private static final ZipShort NULL = new ZipShort(0);
+    private static final byte[] NO_BYTES = new byte[0];
+    private static final JarMarker DEFAULT = new JarMarker();
+
+    /** No-arg constructor */
+    public JarMarker() {
+        // empty
+    }
+
+    /**
+     * Since JarMarker is stateless we can always use the same instance.
+     * @return the DEFAULT jarmaker.
+     */
+    public static JarMarker getInstance() {
+        return DEFAULT;
+    }
+
+    /**
+     * The Header-ID.
+     * @return the header id
+     */
+    public ZipShort getHeaderId() {
+        return ID;
+    }
+
+    /**
+     * Length of the extra field in the local file data - without
+     * Header-ID or length specifier.
+     * @return 0
+     */
+    public ZipShort getLocalFileDataLength() {
+        return NULL;
+    }
+
+    /**
+     * Length of the extra field in the central directory - without
+     * Header-ID or length specifier.
+     * @return 0
+     */
+    public ZipShort getCentralDirectoryLength() {
+        return NULL;
+    }
+
+    /**
+     * The actual data to put into local file data - without Header-ID
+     * or length specifier.
+     * @return the data
+     */
+    public byte[] getLocalFileDataData() {
+        return NO_BYTES;
+    }
+
+    /**
+     * The actual data to put central directory - without Header-ID or
+     * length specifier.
+     * @return the data
+     */
+    public byte[] getCentralDirectoryData() {
+        return NO_BYTES;
+    }
+
+    /**
+     * Populate data from this array as if it was in local file data.
+     * @param data an array of bytes
+     * @param offset the start offset
+     * @param length the number of bytes in the array from offset
+     *
+     * @throws ZipException on error
+     */
+    public void parseFromLocalFileData(byte[] data, int offset, int length)
+        throws ZipException {
+        if (length != 0) {
+            throw new ZipException("JarMarker doesn't expect any data");
+        }
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/NioZipEncoding.java

@@ -0,0 +1,100 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetEncoder;
+import java.nio.charset.CoderResult;
+import java.nio.charset.CodingErrorAction;
+
+/**
+ * A ZipEncoding, which uses a java.nio {@link
+ * java.nio.charset.Charset Charset} to encode names.
+ *
+ * <p>This implementation works for all cases under java-1.5 or
+ * later. However, in java-1.4, some charsets don't have a java.nio
+ * implementation, most notably the default ZIP encoding Cp437.</p>
+ *
+ * <p>The methods of this class are reentrant.</p>
+ */
+class NioZipEncoding implements ZipEncoding {
+    private final Charset charset;
+
+    /**
+     * Construct an NIO based zip encoding, which wraps the given
+     * charset.
+     *
+     * @param charset The NIO charset to wrap.
+     */
+    public NioZipEncoding(final Charset charset) {
+        this.charset = charset;
+    }
+
+    /**
+     * @see ZipEncoding#canEncode(java.lang.String)
+     */
+    public boolean canEncode(final String name) {
+        final CharsetEncoder enc = this.charset.newEncoder();
+        enc.onMalformedInput(CodingErrorAction.REPORT);
+        enc.onUnmappableCharacter(CodingErrorAction.REPORT);
+
+        return enc.canEncode(name);
+    }
+
+    /**
+     * @see ZipEncoding#encode(java.lang.String)
+     */
+    public ByteBuffer encode(final String name) {
+        final CharsetEncoder enc = this.charset.newEncoder();
+
+        enc.onMalformedInput(CodingErrorAction.REPORT);
+        enc.onUnmappableCharacter(CodingErrorAction.REPORT);
+
+        final CharBuffer cb = CharBuffer.wrap(name);
+        ByteBuffer out = ByteBuffer.allocate(name.length()
+                                             + (name.length() + 1) / 2);
+
+        while (cb.remaining() > 0) {
+            final CoderResult res = enc.encode(cb, out, true);
+
+            if (res.isUnmappable() || res.isMalformed()) {
+
+                // write the unmappable characters in utf-16
+                // pseudo-URL encoding style to ByteBuffer.
+                if (res.length() * 6 > out.remaining()) {
+                    out = ZipEncodingHelper.growBuffer(out, out.position()
+                                                       + res.length() * 6);
+                }
+
+                for (int i = 0; i < res.length(); ++i) {
+                    ZipEncodingHelper.appendSurrogate(out, cb.get());
+                }
+
+            } else if (res.isOverflow()) {
+
+                out = ZipEncodingHelper.growBuffer(out, 0);
+
+            } else if (res.isUnderflow()) {
+
+                enc.flush(out);
+                break;
+
+            }
+        }
+
+        out.limit(out.position());
+        out.rewind();
+        return out;
+    }
+
+    /**
+     * @see ZipEncoding#decode(byte[])
+     */
+    public String decode(final byte[] data) throws IOException {
+        return this.charset.newDecoder()
+            .onMalformedInput(CodingErrorAction.REPORT)
+            .onUnmappableCharacter(CodingErrorAction.REPORT)
+            .decode(ByteBuffer.wrap(data)).toString();
+    }
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/Simple8BitZipEncoding.java

@@ -0,0 +1,250 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * This ZipEncoding implementation implements a simple 8 bit character
+ * set, which meets the following restrictions:
+ *
+ * <ul>
+ * <li>Characters 0x0000 to 0x007f are encoded as the corresponding
+ *        byte values 0x00 to 0x7f.</li>
+ * <li>All byte codes from 0x80 to 0xff are mapped to a unique Unicode
+ *       character in the range 0x0080 to 0x7fff. (No support for
+ *       UTF-16 surrogates)
+ * </ul>
+ *
+ * <p>These restrictions most notably apply to the most prominent
+ * omissions of Java 1.4 {@link java.nio.charset.Charset Charset}
+ * implementation, Cp437 and Cp850.</p>
+ *
+ * <p>The methods of this class are reentrant.</p>
+ */
+class Simple8BitZipEncoding implements ZipEncoding {
+
+    /**
+     * A character entity, which is put to the reverse mapping table
+     * of a simple encoding.
+     */
+    private static final class Simple8BitChar implements Comparable<Simple8BitChar> {
+        public final char unicode;
+        public final byte code;
+
+        Simple8BitChar(final byte code, final char unicode) {
+            this.code = code;
+            this.unicode = unicode;
+        }
+
+        public int compareTo(final Simple8BitChar a) {
+            return this.unicode - a.unicode;
+        }
+
+        @Override
+        public String toString() {
+            return "0x" + Integer.toHexString(0xffff & unicode)
+                + "->0x" + Integer.toHexString(0xff & code);
+        }
+
+        @Override
+        public boolean equals(final Object o) {
+            if (o instanceof Simple8BitChar) {
+                final Simple8BitChar other = (Simple8BitChar) o;
+                return unicode == other.unicode && code == other.code;
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return unicode;
+        }
+    }
+
+    /**
+     * The characters for byte values of 128 to 255 stored as an array of
+     * 128 chars.
+     */
+    private final char[] highChars;
+
+    /**
+     * A list of {@link Simple8BitChar} objects sorted by the unicode
+     * field.  This list is used to binary search reverse mapping of
+     * unicode characters with a character code greater than 127.
+     */
+    private final List<Simple8BitChar> reverseMapping;
+
+    /**
+     * @param highChars The characters for byte values of 128 to 255
+     * stored as an array of 128 chars.
+     */
+    public Simple8BitZipEncoding(final char[] highChars) {
+        this.highChars = highChars.clone();
+        final List<Simple8BitChar> temp =
+                new ArrayList<>(this.highChars.length);
+
+        byte code = 127;
+
+        for (char highChar : this.highChars) {
+            temp.add(new Simple8BitChar(++code, highChar));
+        }
+
+        Collections.sort(temp);
+        this.reverseMapping = Collections.unmodifiableList(temp);
+    }
+
+    /**
+     * Return the character code for a given encoded byte.
+     *
+     * @param b The byte to decode.
+     * @return The associated character value.
+     */
+    public char decodeByte(final byte b) {
+        // code 0-127
+        if (b >= 0) {
+            return (char) b;
+        }
+
+        // byte is signed, so 128 == -128 and 255 == -1
+        return this.highChars[128 + b];
+    }
+
+    /**
+     * @param c The character to encode.
+     * @return Whether the given unicode character is covered by this encoding.
+     */
+    public boolean canEncodeChar(final char c) {
+
+        if (c >= 0 && c < 128) {
+            return true;
+        }
+
+        final Simple8BitChar r = this.encodeHighChar(c);
+        return r != null;
+    }
+
+    /**
+     * Pushes the encoded form of the given character to the given byte buffer.
+     *
+     * @param bb The byte buffer to write to.
+     * @param c The character to encode.
+     * @return Whether the given unicode character is covered by this encoding.
+     *         If {@code false} is returned, nothing is pushed to the
+     *         byte buffer.
+     */
+    public boolean pushEncodedChar(final ByteBuffer bb, final char c) {
+
+        if (c >= 0 && c < 128) {
+            bb.put((byte) c);
+            return true;
+        }
+
+        final Simple8BitChar r = this.encodeHighChar(c);
+        if (r == null) {
+            return false;
+        }
+        bb.put(r.code);
+        return true;
+    }
+
+    /**
+     * @param c A unicode character in the range from 0x0080 to 0x7f00
+     * @return A Simple8BitChar, if this character is covered by this encoding.
+     *         A {@code null} value is returned, if this character is not
+     *         covered by this encoding.
+     */
+    private Simple8BitChar encodeHighChar(final char c) {
+        // for performance an simplicity, yet another reincarnation of
+        // binary search...
+        int i0 = 0;
+        int i1 = this.reverseMapping.size();
+
+        while (i1 > i0) {
+
+            final int i = i0 + (i1 - i0) / 2;
+
+            final Simple8BitChar m = this.reverseMapping.get(i);
+
+            if (m.unicode == c) {
+                return m;
+            }
+
+            if (m.unicode < c) {
+                i0 = i + 1;
+            } else {
+                i1 = i;
+            }
+        }
+
+        if (i0 >= this.reverseMapping.size()) {
+            return null;
+        }
+
+        final Simple8BitChar r = this.reverseMapping.get(i0);
+
+        if (r.unicode != c) {
+            return null;
+        }
+
+        return r;
+    }
+
+    /**
+     * @see ZipEncoding#canEncode(java.lang.String)
+     */
+    public boolean canEncode(final String name) {
+
+        for (int i = 0; i < name.length(); ++i) {
+
+            final char c = name.charAt(i);
+
+            if (!this.canEncodeChar(c)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * @see ZipEncoding#encode(java.lang.String)
+     */
+    public ByteBuffer encode(final String name) {
+        ByteBuffer out = ByteBuffer.allocate(name.length()
+                                             + 6 + (name.length() + 1) / 2);
+
+        for (int i = 0; i < name.length(); ++i) {
+            final char c = name.charAt(i);
+
+            if (out.remaining() < 6) {
+                out = ZipEncodingHelper.growBuffer(out, out.position() + 6);
+            }
+
+            if (!this.pushEncodedChar(out, c)) {
+                ZipEncodingHelper.appendSurrogate(out, c);
+            }
+        }
+
+        out.limit(out.position());
+        out.rewind();
+        return out;
+    }
+
+    /**
+     * @see ZipEncoding#decode(byte[])
+     */
+    public String decode(final byte[] data) throws IOException {
+        final char[] ret = new char[data.length];
+
+        for (int i = 0; i < data.length; ++i) {
+            ret[i] = this.decodeByte(data[i]);
+        }
+
+        return new String(ret);
+    }
+
+
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/UnicodeCommentExtraField.java

@@ -0,0 +1,51 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+/**
+ * Info-ZIP Unicode Comment Extra Field (0x6375):
+ *
+ * <p>Stores the UTF-8 version of the file comment as stored in the
+ * central directory header.</p>
+ *
+ * <p>See <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">PKWARE's
+ * APPNOTE.TXT, section 4.6.8</a>.</p>
+ *
+ */
+public class UnicodeCommentExtraField extends AbstractUnicodeExtraField {
+
+    public static final ZipShort UCOM_ID = new ZipShort(0x6375);
+
+    public UnicodeCommentExtraField() {
+    }
+
+    /**
+     * Assemble as unicode comment extension from the name given as
+     * text as well as the encoded bytes actually written to the archive.
+     *
+     * @param text The file name
+     * @param bytes the bytes actually written to the archive
+     * @param off The offset of the encoded comment in <code>bytes</code>.
+     * @param len The length of the encoded comment or comment in
+     * <code>bytes</code>.
+     */
+    public UnicodeCommentExtraField(final String text, final byte[] bytes, final int off,
+                                    final int len) {
+        super(text, bytes, off, len);
+    }
+
+    /**
+     * Assemble as unicode comment extension from the comment given as
+     * text as well as the bytes actually written to the archive.
+     *
+     * @param comment The file comment
+     * @param bytes the bytes actually written to the archive
+     */
+    public UnicodeCommentExtraField(final String comment, final byte[] bytes) {
+        super(comment, bytes);
+    }
+
+    /** {@inheritDoc} */
+    public ZipShort getHeaderId() {
+        return UCOM_ID;
+    }
+
+}

gradle-plugin-shadow/src/main/java/org/xbib/gradle/plugin/shadow/zip/UnicodePathExtraField.java

@@ -0,0 +1,48 @@
+package org.xbib.gradle.plugin.shadow.zip;
+
+/**
+ * Info-ZIP Unicode Path Extra Field (0x7075):
+ *
+ * <p>Stores the UTF-8 version of the file name field as stored in the
+ * local header and central directory header.</p>
+ *
+ * <p>See <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">PKWARE's
+ * APPNOTE.TXT, section 4.6.9</a>.</p>
+ */
+public class UnicodePathExtraField extends AbstractUnicodeExtraField {
+
+    public static final ZipShort UPATH_ID = new ZipShort(0x7075);
+
+    public UnicodePathExtraField() {
+    }
+
+    /**
+     * Assemble as unicode path extension from the name given as
+     * text as well as the encoded bytes actually written to the archive.
+     *
+     * @param text The file name
+     * @param bytes the bytes actually written to the archive
+     * @param off The offset of the encoded filename in <code>bytes</code>.
+     * @param len The length of the encoded filename or comment in
+     * <code>bytes</code>.
+     */
+    public UnicodePathExtraField(final String text, final byte[] bytes, final int off, final int len) {
+        super(text, bytes, off, len);
+    }
+
+    /**
+     * Assemble as unicode path extension from the name given as
+     * text as well as the encoded bytes actually written to the archive.
+     *
+     * @param name The file name
+     * @param bytes the bytes actually written to the archive
+     */
+    public UnicodePathExtraField(final String name, final byte[] bytes) {
+        super(name, bytes);
+    }
+
+    /** {@inheritDoc} */
+    public ZipShort getHeaderId() {
+        return UPATH_ID;
+    }
+}