Enable deployment of Incremental releases

.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>1.0-beta-7</version>
+  </extension>
+</extensions>

.mvn/maven.config

@@ -0,0 +1,2 @@
+-Pconsume-incrementals
+-Pmight-produce-incrementals

Jenkinsfile

@@ -1,25 +1,21 @@
-pipeline {
-    options {
-        buildDiscarder(logRotator(numToKeepStr: '20'))
-        timeout(time: 1, unit: 'HOURS')
-    }
-    agent {
-        docker {
-            image 'maven:3.5.0-jdk-8'
-            label 'docker'
-        }
-    }
-    stages {
-        stage('main') {
-            // TODO Windows build in parallel
-            steps {
-                sh 'mvn -B clean verify'
-            }
-            post {
-                success {
-                    junit '**/target/surefire-reports/TEST-*.xml'
-                }
+properties([buildDiscarder(logRotator(numToKeepStr: '20'))])
+node('docker') {
+    timeout(time: 1, unit: 'HOURS') {
+        deleteDir()
+        checkout scm
+        def tmp = pwd tmp: true
+        // TODO or can do explicitly something like: docker run -v "$TMP"/m2repo:/var/maven/.m2/repository --rm -u $(id -u):$(id -g) -e MAVEN_CONFIG=/var/maven/.m2 -v "$PWD":/usr/src/mymaven -w /usr/src/mymaven maven:3.6.1-jdk-8 mvn -Duser.home=/var/maven …
+        docker.image('maven:3.6.1-jdk-8').inside {
+            withEnv(["TMP=$tmp"]) {
+                // TODO Azure mirror
+                sh 'mvn -B -Dmaven.repo.local="$TMP"/m2repo -ntp -e -Dset.changelist -Dexpression=changelist -Doutput="$TMP"/changelist -Dmaven.test.failure.ignore help:evaluate clean install'
             }
         }
+        junit '**/target/surefire-reports/TEST-*.xml'
+        def changelist = readFile("$tmp/changelist")
+        dir("$tmp/m2repo") {
+            archiveArtifacts "**/*$changelist/*$changelist*"
+        }
     }
 }
+infra.maybePublishIncrementals()

pom.xml

@@ -34,7 +34,7 @@ THE SOFTWARE.
 
   <groupId>org.jenkins-ci.main</groupId>
   <artifactId>jenkins-test-harness</artifactId>
-  <version>2.50-SNAPSHOT</version>
+  <version>${revision}${changelist}</version>
 
   <name>Test harness for Jenkins and plugins</name>
   <description>Harness used to run functional tests of Jenkins core and plugins.</description>
@@ -43,10 +43,12 @@ THE SOFTWARE.
     <connection>scm:git:git://github.com/jenkinsci/${project.artifactId}.git</connection>
     <developerConnection>scm:git:ssh://git@github.com/jenkinsci/${project.artifactId}.git</developerConnection>
     <url>https://github.com/jenkinsci/${project.artifactId}</url>
-    <tag>HEAD</tag>
+    <tag>${scmTag}</tag>
   </scm>
 
   <properties>
+    <revision>2.50</revision>
+    <changelist>-SNAPSHOT</changelist>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <jetty.version>9.4.5.v20170502</jetty.version>
     <java.level>8</java.level>