pipeline {
  agent any

  options {
    buildDiscarder(logRotator(numToKeepStr: '20'))
    disableConcurrentBuilds()
    timeout(time: 10, unit: 'MINUTES')
  }

  stages {
    stage('Archiver') {
      steps {
        sshagent(['projects-storage.eclipse.org-bot-ssh']) {
          sh '''
            set -o pipefail
            LOGIN="genie.oomph@projects-storage.eclipse.org"
            OOMPH_DIR="/home/data/httpd/download.eclipse.org/oomph"
            ARCHIVE_NAME="setups.zip"
            ARCHIVE_LOCATION=${OOMPH_DIR}/www/${ARCHIVE_NAME}
            #ARCHIVE_LOCATION=${OOMPH_DIR}/archive/${ARCHIVE_NAME}
            if ssh ${LOGIN} "test -f ${ARCHIVE_LOCATION}" 2> ssh.errors; then
              scp ${LOGIN}:${ARCHIVE_LOCATION} ${ARCHIVE_NAME}
              mkdir -p setups-old
              cd setups-old
              unzip -q ../${ARCHIVE_NAME}
              cd -
            elif [[ $(stat -c "%s" ssh.errors) == 0 ]]; then 
              echo "${ARCHIVE_LOCATION} does not exist yet."
            else
              echo "ssh failure"
              cat ssh.errors
              exit
            fi

            scp ${LOGIN}:${OOMPH_DIR}/products/latest/eclipse-inst-jre-linux64.tar.gz .
            tar --warning=no-unknown-keyword -xf eclipse-inst-jre-linux64.tar.gz

            eclipse-installer/eclipse-inst \
              -application org.eclipse.oomph.setup.core.SetupArchiver \
              -consoleLog \
              -noSplash \
              -target \
              ${WORKSPACE}/${ARCHIVE_NAME} \
              -vmargs \
                -Dfile.encoding=UTF-8 \
                -Doomph.redirection.oomph.clone="https://raw.githubusercontent.com/eclipse-oomph/oomph/master/->file:$PWD/" \
                -Dorg.eclipse.oomph.setup.internal.core.SetupArchiver.traceEcore=true \
                -Doomph.setup.ecf.trace=false 2>&1 | tee log

            if  ! grep "FAILED" log > changes; then
              echo "NO FAILURES" >> changes
            fi

            if ! grep "CHANGED" log >> changes; then
              echo "UNCHANGED" >> changes
            fi

            if [[ -e setups-old ]]; then
              mkdir -p setups-new
              cd setups-new
              unzip -q ../${ARCHIVE_NAME}

              cd -
              if ! diff -arq setups-old setups-new; then
                diff -ar setups-old setups-new >> changes || true
                echo "The contents have changed"
                cat changes
              else
                echo "The contents are unchanged"
                exit
              fi
            fi

            mv changes changes.old
            echo "PROMOTING changes to ${ARCHIVE_LOCATION}" > changes
            cat changes.old >> changes
            scp ${WORKSPACE}/${ARCHIVE_NAME} ${LOGIN}:${ARCHIVE_LOCATION}.new
            # Ensure that this update is atomic.
            ssh ${LOGIN} "
              mv ${ARCHIVE_LOCATION}.new ${ARCHIVE_LOCATION};
              cd $(dirname ${ARCHIVE_LOCATION});
              rm -rf setups-new setups-old;
              mkdir setups-new;
              cd setups-new;
              unzip -q ${ARCHIVE_LOCATION};
              cd ..;
              if [[  -e setups ]]; then
                mv setups setups-old;
              fi
              mv setups-new setups;
              if [[  -e setups-old ]]; then
                rm -rf setups-old;
              fi
            "
          '''
        }
        script {
          if (sh(returnStdout: true, script:'cat changes').contains("PROMOTING")) {
            currentBuild.setKeepLog(true);
          } else {
            currentBuild.setKeepLog(false);
          }
          env.BUILD_DESCRIPTION = sh(returnStdout: true, script: '''
            sed "s#\\(https?:[^\\"' ]*\\)#<a href='\\1'>\\1</a>#g; s/&/\\&amp;/g; s/\\\\$/\\&#x24;/g; s/</\\&lt;/g; s/>/\\&gt;/g;" < changes | sed -z "s/\\n/<br>\\n/g"
            ''').trim()
        }
        buildDescription "${BUILD_DESCRIPTION}"
      }
    }
  }

  post {
    regression {
      mail to: 'ed.merks@gmail.com',
      subject: "[Oomph CI] Build Failure ${currentBuild.fullDisplayName}",
      mimeType: 'text/html',
      body: "Project: ${env.JOB_NAME}<br/>Build Number: ${env.BUILD_NUMBER}<br/>Build URL: <a href='${env.BUILD_URL}'>${env.BUILD_URL}</a>"
    }

    fixed {
      mail to: 'ed.merks@gmail.com',
      subject: "[Oomph CI] Back to normal ${currentBuild.fullDisplayName}",
      mimeType: 'text/html',
      body: "Project: ${env.JOB_NAME}<br/>Build Number: ${env.BUILD_NUMBER}<br/>Build URL: <a href='${env.BUILD_URL}'>${env.BUILD_URL}</a>"
    }
  }
}