Use maven instead of gradle as build technology

Fixes #937 (comment)

Author: jonahgraham

.github/workflows/validate.yml

@@ -74,8 +74,7 @@ jobs:
         name: Test Results ${{ matrix.os }}
         if-no-files-found: warn
         path: |
-          ${{ github.workspace }}/**/build/test-results/**/*.xml
-          ${{ github.workspace }}/**/build/reports/
+          ${{ github.workspace }}/**/target/surefire-reports**
 
 
     - name: Run API Compare

.gitignore

@@ -4,7 +4,6 @@ bin/
 target/
 build/
 xtend-gen/
-.gradle/
 .idea/
 *.class
 *._trace

CONTRIBUTING.md

@@ -1,8 +1,8 @@
 # Contribution Guide
 
-The project is build with Gradle and written in Java 11.
+The project is build with Maven and written in Java 11.
 
-To start working on it simply clone and run `./gradlew build`. See the section [below](#Eclipse) on building and editing with Eclipse for step-by-step instructions.
+To start working on it simply clone and run `mvn verify`. See the section [below](#Eclipse) on building and editing with Eclipse for step-by-step instructions.
 
 # ECA
 

Jenkinsfile

@@ -0,0 +1,124 @@
+pipeline {
+  agent {
+    kubernetes {
+      // See comment in deplog-build.sh (gpg:sign-and-deploy-file)
+      inheritFrom 'ubuntu-2404'
+    }
+  }
+  tools {
+    maven 'apache-maven-latest'
+    // Default JDK picked up from here, build and test requires
+    // older JDKs too, which are discovered by gradle from ~/.m2/toolchains.xml
+    jdk 'temurin-jdk21-latest'
+  }
+  options {
+    timestamps()
+    disableConcurrentBuilds()
+  }
+  stages {
+    stage('Clean') {
+      steps {
+        timeout(activity: true, time: 20) {
+          sh '''
+                git status --ignored
+                git clean -dfx
+                git reset --hard HEAD
+                git status --ignored
+             '''
+        }
+      }
+    }
+    stage('Gradle') {
+      steps {
+        timeout(activity: true, time: 20) {
+          sh "echo $JAVA_HOME"
+          sh "java -version"
+          sh "which java"
+          sh "cat ~/.m2/toolchains.xml"
+          sh "./gradlew \
+                --no-daemon \
+                -PignoreTestFailures=true \
+                --refresh-dependencies \
+                --continue \
+                clean build jmhCompileGeneratedClasses testOlderJavas signJar publish \
+                "
+        }
+      }
+    }
+    stage('Maven') {
+      steps {
+        timeout(activity: true, time: 20) {
+          sh "mvn \
+                -f releng/pom.xml \
+                -Dmaven.repo.local=.repository \
+                --batch-mode --update-snapshots \
+                clean install -Psign \
+                "
+        }
+      }
+    }
+    stage('japicmp') {
+      steps {
+        timeout(activity: true, time: 20) {
+          sh "./releng/runjapicmp.sh"
+        }
+      }
+    }
+    stage('Deploy Snapshot') {
+      steps {
+        timeout(activity: true, time: 20) {
+          withCredentials([file(credentialsId: 'secret-subkeys.asc', variable: 'KEYRING')]) {
+              sh 'gpg --batch --import "${KEYRING}"'
+              sh 'for fpr in $(gpg --list-keys --with-colons  | awk -F: \'/fpr:/ {print $10}\' | sort -u); do echo -e "5\ny\n" |  gpg --batch --command-fd 0 --expert --edit-key ${fpr} trust; done'
+          }
+          sshagent ( ['projects-storage.eclipse.org-bot-ssh']) {
+            // Skip Deploy on release builds
+            // XXX: Can release vs snapshot be detected automatically so that
+            // the following line does not have to be commented/uncommented
+            // on each change to/from SNAPSHOT?
+            sh 'cd releng && ./deploy-build.sh'
+          }
+        }
+      }
+    }
+  }
+  post {
+    always {
+      junit '**/target/surefire-reports**/*.xml'
+      archiveArtifacts '**/target/surefire-reports**'
+    }
+    cleanup {
+      script {
+        def curResult = currentBuild.currentResult
+        def lastResult = 'NEW'
+        if (currentBuild.previousBuild != null) {
+          lastResult = currentBuild.previousBuild.result
+        }
+
+        if (curResult != 'SUCCESS' || lastResult != 'SUCCESS') {
+          def color = ''
+          switch (curResult) {
+            case 'SUCCESS':
+              color = '#00FF00'
+              break
+            case 'UNSTABLE':
+              color = '#FFFF00'
+              break
+            case 'FAILURE':
+              color = '#FF0000'
+              break
+            default: // e.g. ABORTED
+              color = '#666666'
+          }
+
+          matrixSendMessage https: true,
+            hostname: 'matrix.eclipse.org',
+            accessTokenCredentialsId: "matrix-token",
+            roomId: '!OVFCkkbjNkALzklVdr:matrix.eclipse.org',
+            body: "${lastResult} => ${curResult} ${env.BUILD_URL} | ${env.JOB_NAME}#${env.BUILD_NUMBER}",
+            formattedBody: "<div><font color='${color}'>${lastResult} => ${curResult}</font> | <a href='${env.BUILD_URL}' target='_blank'>${env.JOB_NAME}#${env.BUILD_NUMBER}</a></div>"
+        }
+      }
+    }
+  }
+}

bnd-common.bnd

@@ -0,0 +1,22 @@
+Eclipse-SourceReferences: \
+  scm:git:https://github.com/eclipse-lsp4j/lsp4j.git;path="${project.artifactId}"
+Bundle-SymbolicName: ${project.artifactId}
+Bundle-Name: ${project.name}
+Bundle-Version: ${project.version}
+Bundle-Vendor: Eclipse LSP4J
+Bundle-RequiredExecutionEnvironment: JavaSE-${maven.compiler.release}
+Automatic-Module-Name: ${project.artifactId}
+
+pkg.version: ${version;===;${version_cleanup;${project.version}}}
+-exportcontents: org.eclipse.lsp4j.*;version="${pkg.version}"
+
+# Use https://github.com/bndtools/bnd/blob/master/maven-plugins/bnd-maven-plugin/README.md#reproducible-builds
+# to allow saving the manifest into git too - this makes it easier
+# to verify the MANIFEST is changed as expected
+-savemanifest: ${project.basedir}/META-INF/MANIFEST.MF
+-snapshot: SNAPSHOT
+-noextraheaders: true
+-removeheaders: Bundle-DocURL
+
+# Place this warning comment in the output MANIFEST
+X-Comment-LSP4J: This file is auto-generates, edit the bnd.bnd file, not the MANIFEST.MF file, and regenerate with maven

bnd.bnd

@@ -0,0 +1,2 @@
+-include: bnd-common.bnd
+Import-Package: com.google.gson.*;version="${gson.version.range}",*