Flatten repositories from JEP-229 plugins

pom.xml

@@ -1338,6 +1338,10 @@
                   <flattenMode>oss</flattenMode>
                   <outputDirectory>${project.build.directory}</outputDirectory>
                   <flattenedPomFilename>${project.artifactId}-${project.version}.pom</flattenedPomFilename>
+                  <!-- TODO https://github.com/mojohaus/flatten-maven-plugin/issues/362 -->
+                  <pomElements>
+                    <repositories>flatten</repositories>
+                  </pomElements>
                 </configuration>
               </execution>
             </executions>

src/it/cd-plugin/.mvn/extensions.xml

@@ -0,0 +1,7 @@
+<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.0.0 http://maven.apache.org/xsd/core-extensions-1.0.0.xsd">
+  <extension>
+    <groupId>io.jenkins.tools.incrementals</groupId>
+    <artifactId>git-changelist-maven-extension</artifactId>
+    <version>1.6</version>
+  </extension>
+</extensions>

src/it/cd-plugin/.mvn/maven.config

@@ -0,0 +1,3 @@
+-Pconsume-incrementals
+-Pmight-produce-incrementals
+-Dchangelist.format=%d.v%s

src/it/cd-plugin/invoker.properties

@@ -0,0 +1,2 @@
+# Same options as in https://github.com/jenkins-infra/jenkins-maven-cd-action/blob/master/run.sh (but hard-coding a sample changelist)
+invoker.goals=-Dstyle.color=always -Dset.changelist -Dchangelist=1234.deadbeef5678 -ntp -P-consume-incrementals -Pquick-build clean install

src/it/cd-plugin/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.jenkins-ci.plugins</groupId>
+    <artifactId>plugin</artifactId>
+    <version>@project.version@</version>
+    <relativePath />
+  </parent>
+  <groupId>org.jenkins-ci.plugins.its</groupId>
+  <artifactId>cd-plugin</artifactId>
+  <version>${changelist}</version>
+  <packaging>hpi</packaging>
+  <name>CD plugin</name>
+  <description>CD description</description>
+  <properties>
+    <changelist>999999-SNAPSHOT</changelist>
+    <spotless.check.skip>false</spotless.check.skip>
+  </properties>
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.jenkins-ci.plugins</groupId>
+        <artifactId>structs</artifactId>
+        <version>1.5</version>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+  <dependencies>
+    <dependency>
+      <groupId>org.jenkins-ci.plugins</groupId>
+      <artifactId>structs</artifactId>
+    </dependency>
+  </dependencies>
+  <repositories>
+    <repository>
+      <id>repo.jenkins-ci.org</id>
+      <url>https://repo.jenkins-ci.org/public/</url>
+    </repository>
+  </repositories>
+  <pluginRepositories>
+    <pluginRepository>
+      <id>repo.jenkins-ci.org</id>
+      <url>https://repo.jenkins-ci.org/public/</url>
+    </pluginRepository>
+  </pluginRepositories>
+</project>

src/it/cd-plugin/postbuild.groovy

@@ -0,0 +1,23 @@
+assert new File(basedir, 'target/cd-plugin.hpi').file
+assert new File(basedir, 'target/cd-plugin.jar').file
+
+File installed = new File(basedir, '../../local-repo/org/jenkins-ci/plugins/its/cd-plugin/1234.deadbeef5678/')
+assert new File(installed, 'cd-plugin-1234.deadbeef5678.hpi').file
+
+def targetPom = new File(basedir, 'target/cd-plugin-1234.deadbeef5678.pom')
+assert targetPom.file
+
+def installedPom = new File(installed, 'cd-plugin-1234.deadbeef5678.pom')
+assert installedPom.file
+
+assert installedPom.text.contains("<name>")
+assert installedPom.text.contains("<description>")
+assert installedPom.text.contains("<dependencies>")
+assert installedPom.text.contains("<build>")
+assert installedPom.text.contains("<scm>")
+assert !installedPom.text.contains("<properties>")
+assert !installedPom.text.contains("<dependencyManagement>")
+assert !installedPom.text.contains("<repositories>")
+assert !installedPom.text.contains("<pluginRepositories>")
+
+return true

src/it/cd-plugin/src/main/resources/index.jelly

@@ -0,0 +1,2 @@
+<?jelly escape-by-default='true'?>
+<div/>