auto_merge_approved_pr.yml

name: "Auto Merge Approved PRs"

on:
  pull_request_review:
    types: [submitted]

jobs:
  auto_merge:
    runs-on: ubuntu-latest
    steps:
      - name: "Get Pull Request"
        id: pr
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          result-encoding: string
          script: |
            const { data: pr } = await github.rest.pulls.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.payload.pull_request.number,
            });
            core.setOutput('result', JSON.stringify(pr));
      - name: "Check Approvals"
        id: check
        uses: actions/github-script@v6
        env:
          PR_RESULT: ${{ steps.pr.outputs.result }}
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const pr = JSON.parse(process.env.PR_RESULT);
            const reviews = await github.rest.pulls.listReviews({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: pr.number,
            });
            const approvals = reviews.data.filter(review => review.state === 'APPROVED');
            core.setOutput('result', approvals.length >= 2);
      - name: "Merge PR"
        if: ${{ steps.check.outputs.result == 'true' }}
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            await github.rest.pulls.merge({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.payload.pull_request.number,
            });