release_pr.yml

name: Release pull request
on:
  pull_request:
    types:
      - synchronize
      - closed
    branches:
      - master
  workflow_dispatch:
env:
  YALESITES_BUILD_TOKEN: ${{ secrets.YALESITES_BUILD_TOKEN }}
  GH_TOKEN: ${{ secrets.YALESITES_BUILD_TOKEN }}
  ACCESS_TOKEN: ${{ secrets.YALESITES_BUILD_TOKEN }}
  REPO: ${{ github.repository }}
  PR_NUMBER: ${{ github.event.number }}
  RELEASE_PR_URL: ${{ github.event.pull_request._links.html.href }}
jobs:
  setup:
    runs-on: ubuntu-latest
    steps:
    - name: Determine Terminus version
      shell: bash
      run: |
        TERMINUS_RELEASE=$(
          curl --silent \
            --header 'authorization: Bearer ${{ github.token }}' \
            "https://api.github.com/repos/pantheon-systems/terminus/releases/latest" \
            | perl -nle'print $& while m#"tag_name": "\K[^"]*#g'
        )
        echo "TERMINUS_RELEASE=$TERMINUS_RELEASE" >> $GITHUB_ENV

    - name: Install Terminus
      shell: bash
      run: |
        mkdir ~/terminus && cd ~/terminus
        echo "Installing Terminus v$TERMINUS_RELEASE"
        curl -L https://github.com/pantheon-systems/terminus/releases/download/$TERMINUS_RELEASE/terminus.phar -o /usr/local/bin/terminus
        chmod +x /usr/local/bin/terminus

    - name: Authenticate to Terminus
      env:
        TERMINUS_TOKEN: ${{ secrets.TERMINUS_TOKEN }}
      run: |
        terminus auth:login --machine-token="${TERMINUS_TOKEN}"

    - name: Install SSH key
      uses: shimataro/ssh-key-action@v2
      with:
        key: ${{ secrets.SSH_PRIVATE_KEY }}
        known_hosts: unnecessary
        config: ${{ secrets.SSH_CONFIG }}

    - name: Cache terminus
      uses: actions/cache@v4
      id: terminus-cache
      with:
        path: |
          /usr/local/bin/terminus
          ~/.terminus
          ~/.ssh
        key: ${{ runner.os }}-terminus-cache-${{ hashFiles('**/composer.lock') }}
        restore-keys: |
          ${{ runner.os }}-terminus-cache-

  get_next_release_version:
    runs-on: ubuntu-latest
    needs: [setup]
    if: ${{ github.event.action != 'synchronize' && github.event.action != 'closed' }}
    steps:
    - name: Checkout
      uses: actions/checkout@v4
      with:
        ref: master
        fetch-depth: 0

    - name: Setup node
      uses: actions/setup-node@v4
      with:
        node-version: 20

    - name: Git setup
      run: |
        git config user.name github-actions
        git config user.email github-actions@github.com

    - name: Get next release number
      id: get_release_number
      run: |
        if [[ "$PR_NUMBER" ]]; then
          release_branch=$(gh pr view "$PR_NUMBER" --json headRefName --jq '.[]')
        else
          git merge origin/develop --no-edit -X theirs
          npm install --force
          unset GITHUB_ACTIONS
          unset GITHUB_EVENT_NAME
          semantic_release=$(npx --no-install semantic-release --no-ci --dry-run 2>/dev/null)
          next_version=$(echo "$semantic_release" | sed -nE 's/.*The next release version is ([0-9]+)\.([0-9]+)\.([0-9]+).*/\1\2\3/p')
          
          if [ -z "$next_version" ]; then
            exit 1
          else
            release_branch="v${next_version//.}"
          fi
        fi
        # echo release_branch="$release_branch" >> "$GITHUB_OUTPUT"

        # Set release branch as a variable for access.
        gh variable set RELEASE_BRANCH --body "$release_branch"

    - name: Create release branch
      if: ${{ github.event.number == '' }}
      env:
        RELEASE_BRANCH: ${{ vars.RELEASE_BRANCH }}
      run: |
        echo "The release branch is: $RELEASE_BRANCH" 
        git checkout -b "$RELEASE_BRANCH"
        git push origin "$RELEASE_BRANCH"

  create_pull_request:
    needs: [setup, get_next_release_version]
    if: ${{ always() && github.event.action != 'closed' }}
    outputs:
      PR_NUMBER: ${{ steps.create_pull_request.outputs.PR_NUMBER }}
    env:
      RELEASE_BRANCH: ${{ vars.RELEASE_BRANCH }}
    runs-on: ubuntu-latest
    steps:
    - name: Checkout
      uses: actions/checkout@v4

    - name: Create pull request
      id: create_pull_request
      run: ./.ci/github/create_release_pull_request

  release_sites:
    needs: [setup, get_next_release_version, create_pull_request]
    runs-on: ubuntu-latest
    if: ${{ github.event.action != 'closed' }}
    env:
      RELEASE_BRANCH: ${{ vars.RELEASE_BRANCH }}
      PR_NUMBER: ${{ needs.create_pull_request.outputs.PR_NUMBER }}
      RELEASE_SITES: ${{ vars.RELEASE_SITES }}
    steps:
    - name: Checkout
      uses: actions/checkout@v4
      with:
        ref: ${{ env.RELEASE_BRANCH }}

    - name: Git setup
      run: |
        git config user.name github-actions
        git config user.email github-actions@github.com

    - name: Deploy to environments
      run: ./.ci/github/deploy_release_sites

  clean_up:
    if: ${{ github.event.action == 'closed' }}
    needs: [setup]
    runs-on: ubuntu-latest
    env:
      RELEASE_BRANCH: ${{ vars.RELEASE_BRANCH }}
    steps:
    - name: Restore cache
      uses: actions/cache@v4
      id: terminus-cache
      with:
        path: |
          /usr/local/bin/terminus
          ~/.terminus
          ~/.ssh
        key: ${{ runner.os }}-terminus-cache-${{ hashFiles('**/composer.lock') }}
        restore-keys: |
          ${{ runner.os }}-terminus-cache-

    - name: Clean up
      run: |
        process_site() {
          site_with_env="$1"
          site_machine_name="${site_with_env%.*}"
          terminus multidev:delete "$site_with_env"."$RELEASE_BRANCH" --delete-branch -y
        }
        export process_site
        readarray -t release_sites <<< "$(tr -d '\r' <<< "$RELEASE_SITES")"
        parallel --jobs 0 --keep-order --line-buffer process_site ::: "${release_sites[@]}"