auto-merge.yml

# Check auto merge contiditons of PR and proceed merging
name: "check auto merge contiditons and proceed merging"

# Event on a comment (in PR)
on:
  issue_comment:
    types: [created]
jobs:
  # Check auto merge contiditons of PR and proceed merging
  automerge:  
    # Apply this job if it is a PR and by OWNER with '/approve' comment
    if: ${{ github.event.issue.pull_request && startsWith(github.event.comment.body, '/approve') }}
    
    # This job runs on Ubuntu-latest (Ubuntu 22.04 LTS checked on 2023-12-13)
    # See https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners
    runs-on: ubuntu-22.04
    steps:
      # Check the commenter is a member of the maintainer team of this repo
      - name: Extract Repository Name
        id: repo-name
        run: echo "REPO_NAME=$(echo ${{ github.repository }} | cut -d'/' -f2)" >> $GITHUB_ENV
        
      - name: Get Maintainer Team Members
        id: check-team-members
        run: |
          TEAM_NAME="${{ env.REPO_NAME }}-maintainer"
          echo "GITHUB_ACTOR: ${GITHUB_ACTOR} / TEAM_NAME: ${TEAM_NAME}"

          TEAM_MEMBERS=$(curl -L \
                          -H "Accept: application/vnd.github+json" \
                          -H "Authorization: Bearer ${{ secrets.CR_PAT }}" \
                          -H "X-GitHub-Api-Version: 2022-11-28" \
                          https://api.github.com/orgs/cloud-barista/teams/${TEAM_NAME}/members | jq -r '.[] | .login' | tr '\n' ',')
          echo "TEAM_MEMBERS=$TEAM_MEMBERS" >> $GITHUB_ENV
          echo "TEAM_MEMBERS: ${TEAM_MEMBERS}"
          
      - name: Verify if GITHUB_ACTOR is a Maintainer Team Member
        run: |
          TEAM_MEMBERS_ARRAY=(${TEAM_MEMBERS//,/ })
          if [[ ! " ${TEAM_MEMBERS_ARRAY[@]} " =~ " ${GITHUB_ACTOR} " ]]; then
            echo "User ${GITHUB_ACTOR} is not a member of the team. Stopping workflow."
            exit 1
          fi
      
      # Apply 'approved' label when OWNER left '/approve' comment
      - uses: actions/checkout@v4
      - uses: actions-ecosystem/action-add-labels@v1
        with:
          github_token: ${{ secrets.github_token }}
          labels: |
            approved
      
      # AutoMerging if this PR has MERGE_LABELS: approved, lgtm (not wip, hold)
      - name: automerge-lgtm-approved
        uses: "pascalgn/automerge-action@v0.16.4"
        env:
          GITHUB_TOKEN: "${{ secrets.CR_PAT }}"
          LOG: "DEBUG" # or "TRACE"
          MERGE_LABELS: "approved,!wip,!hold"
          MERGE_REMOVE_LABELS: ""
          MERGE_METHOD: "merge"
          MERGE_COMMIT_MESSAGE: "pull-request-title"
          MERGE_FORKS: "true"
          MERGE_RETRIES: "6"
          MERGE_RETRY_SLEEP: "10000"
          UPDATE_LABELS: "automerge"
          UPDATE_METHOD: "merge"