@NonCPS
def getSlackMessage() {
    def message = "Build <${env.BUILD_URL}|#${env.BUILD_NUMBER}> of <https://git.eclipse.org/c/hawk/hawk.git/log/?h=${env.BRANCH_NAME}|${currentBuild.fullProjectName}> "
    
    message += (currentBuild.currentResult == "SUCCESS" ? "passed" : "failed") + " in ${currentBuild.durationString}\n\n"
    for (changeSet in currentBuild.changeSets) {
      for (entry in changeSet.items) {
        message += "`${entry.commitId.take(7)}` ${entry.msg} - ${entry.author}\n"
      }
    }
    return message
}

pipeline {
    agent {
      kubernetes {
        yaml """
apiVersion: v1
kind: Pod
spec:
  containers:
  - name: maven
    image: maven:3.6.3-jdk-8
    command:
    - cat
    tty: true
    resources:
      limits:
        memory: "4Gi"
        cpu: "1"
      requests:
        memory: "4Gi"
        cpu: "1"
    env:
    - name: "MAVEN_OPTS"
      value: "-Duser.home=/home/jenkins -Xmx512m -Xms256m"
    - name: "HOME"
      value: "/home/jenkins"
    volumeMounts:
    - name: jenkins-home
      mountPath: /home/jenkins
      readOnly: false
    - name: settings-xml
      mountPath: /home/jenkins/.m2/settings.xml
      subPath: settings.xml
      readOnly: true
    - name: settings-security-xml
      mountPath: /home/jenkins/.m2/settings-security.xml
      subPath: settings-security.xml
      readOnly: true
    - name: toolchains-xml
      mountPath: /home/jenkins/.m2/toolchains.xml
      subPath: toolchains.xml
      readOnly: true
    - name: m2-repo
      mountPath: /home/jenkins/.m2/repository
    - name: volume-known-hosts
      mountPath: /home/jenkins/.ssh
  - name: jnlp
    volumeMounts:
    - name: volume-known-hosts
      mountPath: /home/jenkins/.ssh
  volumes:
  - name: jenkins-home
    emptyDir:
      medium: ""
  - name: settings-xml
    secret:
      secretName: m2-secret-dir
      items:
      - key: settings.xml
        path: settings.xml
  - name: settings-security-xml
    secret:
      secretName: m2-secret-dir
      items:
      - key: settings-security.xml
        path: settings-security.xml
  - name: m2-repo
    emptyDir: {}
  - name: toolchains-xml
    configMap:
      name: m2-dir
      items:
      - key: toolchains.xml
        path: toolchains.xml
  - name: volume-known-hosts
    configMap:
      name: known-hosts
"""
       }
    }
    stages {
        stage('Core without tests') {
          when {
            anyOf {
                changeset 'core/plugins/**'
                changeset 'core/tests/**'
                changeset 'core/releng/org.eclipse.hawk.targetplatform/**'
                changeset 'greycat/**'
                changeset 'server/**'
                changeset 'pom.xml'
                changeset 'pom-plain.xml'
                expression { return currentBuild.number == 1 }
                triggeredBy 'UserIdCause'
            }
          }
          steps {
            container('maven') {
              sh 'cd core && mvn -B --quiet clean install -DskipTests --toolchains jenkins-toolchains.xml'
            }
          }
        }
        stage('Greycat without tests') {
          when {
            anyOf {
                changeset 'core/plugins/**'
                changeset 'core/tests/**'
                changeset 'core/releng/org.eclipse.hawk.targetplatform/**'
                changeset 'greycat/**'
                changeset 'server/**'
                changeset 'pom.xml'
                changeset 'pom-plain.xml'
                expression { return currentBuild.number == 1 }
                triggeredBy 'UserIdCause'
            }
          }
          steps {
            container('maven') {
              sh 'cd greycat && mvn -B --quiet clean install -DskipTests --toolchains ../core/jenkins-toolchains.xml'
            }
          }
        }    
        stage('Tycho') {
          when {
            anyOf {
                changeset 'core/plugins/**'
                changeset 'core/tests/**'
                changeset 'core/releng/org.eclipse.hawk.targetplatform/**'
                changeset 'greycat/**'
                changeset 'server/**'
                changeset 'pom.xml'
                changeset 'pom-plain.xml'
                expression { return currentBuild.number == 1 }
                triggeredBy 'UserIdCause'
            }
          }
          steps {
            container('maven') {
              sh 'cd server && mvn -B --quiet clean install -P signjars -DfailIfNoTests=false --toolchains ../core/jenkins-toolchains.xml'
            }
          }
          post { always { junit '**/TEST-*.xml' } }
        }
        stage('Downloads') {
          when {
            allOf {
              branch 'master'
              anyOf {
                changeset 'core/plugins/**'
                changeset 'core/tests/**'
                changeset 'core/releng/org.eclipse.hawk.targetplatform/**'
                changeset 'greycat/**'
                changeset 'server/**'
                changeset 'pom.xml'
                changeset 'pom-plain.xml'
                expression { return currentBuild.number == 1 }
                triggeredBy 'UserIdCause'
              }
            }
          }
          steps {
            lock('download-area') {
              sshagent (['projects-storage.eclipse.org-bot-ssh']) {
                sh 'server/deploy-downloads.sh'
              }
            }
          }
        }
    }
    post {
      success{
        slackSend (channel: '#ci-notifications', botUser: true, color: '#00FF00', message: getSlackMessage())
      }
      failure {
        slackSend (channel: '#ci-notifications', botUser: true, color: '#FF0000', message: getSlackMessage())
      }
      changed {
        emailext(body: "${currentBuild.currentResult}: Job ${env.JOB_NAME} build ${env.BUILD_NUMBER}\n More info at: ${env.BUILD_URL}",
                 recipientProviders: [[
                   $class: "DevelopersRecipientProvider",
                   $class: "RequesterRecipientProvider"
                 ]],
                 subject: "Jenkins Build ${currentBuild.currentResult}: Job ${env.JOB_NAME}")
      }
    }
}