perform-release.yml

name: "Perform Release"

on:
  pull_request_review:
    types: [submitted]

  workflow_dispatch:
    inputs:
      release_pr_number:
        description: "The PR number of the release PR"
        required: true

env:
  MVN_CLI_ARGS: "--batch-mode --no-transfer-progress --fail-at-end --show-version"

  DOCS_REPO: SAP/cloud-sdk

jobs:
  prerequisites:
    name: "Prerequisites"
    if: ${{ github.event_name == 'workflow_dispatch' || (github.event_name == 'pull_request_review' && github.event.review.state == 'approved' && startsWith(github.event.pull_request.head.ref, 'RELEASE-')) }}
    outputs:
      release-version: ${{ steps.determine-branch-names.outputs.RELEASE_VERSION }}
      release-tag: ${{ steps.determine-branch-names.outputs.RELEASE_TAG }}
      code-branch: ${{ steps.determine-branch-names.outputs.CODE_BRANCH_NAME }}
      docs-branch: ${{ steps.determine-branch-names.outputs.DOCS_BRANCH_NAME }}
      release-notes-branch: ${{ steps.determine-branch-names.outputs.RELEASE_NOTES_BRANCH_NAME }}
    permissions:
      pull-requests: read
    runs-on: ubuntu-latest
    steps:
      - name: "Determine Branch Names"
        id: determine-branch-names
        run: |
          if [[ "${{ github.event_name }}" == "pull_request_review" ]]; then
            echo "[DEBUG] Taking branch name from pull request event"
            BRANCH_NAME=${{ github.event.pull_request.head.ref }}
          elif [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            echo "[DEBUG] Taking branch name from workflow dispatch event"
            BRANCH_NAME=$(gh pr view ${{ github.event.inputs.release_pr_number }} --repo "${{ github.repository }}" --json headRefName | jq -r '.headRefName')
          else
            echo "Cannot determine branch name from event '${{ github.event_name }}'"
            exit 1
          fi
          
          RELEASE_VERSION=$(echo "$BRANCH_NAME" | cut -d '-' -f2) 
          DOCS_BRANCH=java/release-docs-$RELEASE_VERSION
          RELEASE_NOTES_BRANCH=java/release-notes-$RELEASE_VERSION
          
          echo "RELEASE_VERSION=$RELEASE_VERSION" >> $GITHUB_OUTPUT
          echo "RELEASE_TAG=rel/$RELEASE_VERSION" >> $GITHUB_OUTPUT
          echo "CODE_BRANCH_NAME=$BRANCH_NAME" >> $GITHUB_OUTPUT
          echo "DOCS_BRANCH_NAME=$DOCS_BRANCH" >> $GITHUB_OUTPUT
          echo "RELEASE_NOTES_BRANCH_NAME=$RELEASE_NOTES_BRANCH" >> $GITHUB_OUTPUT
        env:
          GH_TOKEN: ${{ github.token }}

      - name: "Checkout Repository"
        uses: actions/checkout@v4
        with:
          ref: ${{ steps.determine-branch-names.outputs.CODE_BRANCH_NAME }}

      - name: "Check Whether Code PR Can Be Merged"
        uses: ./.github/actions/pr-is-mergeable
        with:
          pr-ref: ${{ steps.determine-branch-names.outputs.CODE_BRANCH_NAME }}

      - name: "Check Whether Docs PR Can Be Merged"
        uses: ./.github/actions/pr-is-mergeable
        with:
          pr-ref: ${{ steps.determine-branch-names.outputs.DOCS_BRANCH_NAME }}
          repo: ${{ env.DOCS_REPO }}
          token: ${{ secrets.BOT_SDK_JS_FOR_DOCS_REPO_PR }}

      - name: "Check Whether Release Notes PR Can Be Merged"
        uses: ./.github/actions/pr-is-mergeable
        with:
          pr-ref: ${{ steps.determine-branch-names.outputs.RELEASE_NOTES_BRANCH_NAME }}
          repo: ${{ env.DOCS_REPO }}
          token: ${{ secrets.BOT_SDK_JS_FOR_DOCS_REPO_PR }}

  release:
    name: "Release"
    needs: [ prerequisites ]
    runs-on: ubuntu-latest
    permissions:
      contents: write # needed to modify the release draft
      pull-requests: write # needed to merge the release PR
    steps:
      - name: "Setup java"
        uses: actions/setup-java@v3
        with:
          distribution: "temurin"
          java-version: "17"
          server-id: ossrh
          server-username: MAVEN_CENTRAL_USER # env variable for username in deploy
          server-password: MAVEN_CENTRAL_PASSWORD # env variable for token in deploy

      - name: "Download Release Asset"
        id: download-asset
        run: |
          gh release download ${{ needs.prerequisites.outputs.release-tag }} --dir ./ --repo "${{ github.repository }}"
          # x=extract v=verbose z=decompress f=file C=destination directory
          tar -xvzf apidocs-*.tar.gz -C .
          tar -xvzf release-*.tar.gz -C .
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: "Import GPG Key"
        run: |
          echo "${{ secrets.PGP_PRIVATE_KEY }}" | gpg --batch --passphrase "$PASSPHRASE" --import
        env:
          PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}

      - name: "Perform Release"
        run: >
          mvn
          $MVN_CLI_ARGS
          -DrepositoryId=local
          -Durl=file:./temp_local_repo
          -Dmaven.install.skip=true
          -Dgpg.passphrase="$GPG_PASSPHRASE"
          -Dgpg.keyname="$MAVEN_CENTRAL_USER"
          deploy

          mvn
          $MVN_CLI_ARGS
          org.sonatype.plugins:nexus-staging-maven-plugin:1.6.13:deploy-staged-repository
          -DserverId=ossrh
          -DnexusUrl=https://oss.sonatype.org
          -DrepositoryDirectory=./temp_local_repo
          -DstagingProfileId=$MAVEN_CENTRAL_PROFILE_ID
        env:
          MAVEN_CENTRAL_USER: ${{ secrets.MAVEN_CENTRAL_USER }}
          MAVEN_CENTRAL_PASSWORD: ${{ secrets.MAVEN_CENTRAL_PASSWORD }}
          MAVEN_CENTRAL_PROFILE_ID: ${{ secrets.MAVEN_CENTRAL_PROFILE_ID }}
          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}

      - name: "Merge Code PR"
        run: gh pr merge --squash "${{ needs.prerequisites.outputs.code-branch }}" --delete-branch --repo "${{ github.repository }}"
        env:
          GH_TOKEN: ${{ github.token }}

      - name: "Publish the Draft Release"
        run: gh release edit ${{ needs.prerequisites.outputs.release-tag }} --draft=false --repo "${{ github.repository }}"
        env:
          GH_TOKEN: ${{ github.token }}

      - name: "Merge Docs PR"
        run: gh pr merge --squash "${{ needs.prerequisites.outputs.docs-branch }}" --delete-branch --repo "${{ env.DOCS_REPO }}"
        env:
          GH_TOKEN: ${{ secrets.BOT_SDK_JS_FOR_DOCS_REPO_PR }}

      - name: "Merge Release Notes PR"
        run: |
          # https://github.com/cli/cli/issues/8092#issuecomment-1814439651
          # The Release Notes mergeability computation hasn't completed yet
          # Because the base branch just changed from merging the Javadoc.
          # Sleep and retry to work around "Base branch was modified." error.
          for i in {1..3}; do
            sleep 5
            if gh pr merge --squash "${{ needs.prerequisites.outputs.release-notes-branch }}" --delete-branch --repo "${{ env.DOCS_REPO }}"; then
              exit 0
            fi
          done
          exit 1
        env:
          GH_TOKEN: ${{ secrets.BOT_SDK_JS_FOR_DOCS_REPO_PR }}

  notify-job:
    runs-on: ubuntu-latest
    needs: [ prerequisites, release ]
    if: ${{ failure() }}
    steps:
      - name: "Checkout"
        uses: actions/checkout@v4
      - name: "Notify"
        run: python .pipeline/scripts/notify.py
        env:
          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
          WORKFLOW: ${{ github.workflow }}
          WORKFLOW_RUN_URL: https://github.com/SAP/cloud-sdk-java/actions/runs/${{ github.run_id }}
          BRANCH_NAME: ${{ needs.prerequisites.outputs.code-branch }}