piston/.github/workflows/package-pr.yaml

name: 'Package Pull Requests'

on:
  pull_request:
    types:
      - opened
      - edited
      - reopened
      - synchronize
    paths:
      - 'packages/**'

jobs:
  packages-affected:
    name: List affected packages
    runs-on: ubuntu-latest
    steps:
      - name: Get PR Commits
        id: 'get-pr-commits'
        uses: tim-actions/get-pr-commits@master
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
      - name: Check subsystem
        if: ${{ success() || failure() }}
        uses: tim-actions/commit-message-checker-with-regex@v0.3.1
        with:
          commits: ${{ steps.get-pr-commits.outputs.commits }}
          pattern: '^[\s]*(pkg\([^:\s\n]+\))[\s]*:'
          error: 'Your commit message must start with pkg([package])'
      
      - name: Get packages
        id: 'get-packages'
        shell: bash
        run: |
          COMMITS='${{ steps.get-pr-commits.outputs.commits }}'
          PACKAGES=$(echo $COMMITS | jq .[].commit.message -r | grep -oP '^pkg\(\K[^:\h\n]+(?=\))' | sort -u | sed 's/^/* /')
          PACKAGES=${PACKAGES//$'%'/'%25'}
          PACKAGES=${PACKAGES//$'\n'/'%0A'}
          PACKAGES=${PACKAGES//$'\r'/'%0D'}
          echo "::set-output name=packages::$PACKAGES"

      - name: 'Comment PR'
        uses: actions/github-script@0.3.0
        if: github.event_name == 'pull_request'
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { issue: { number: issue_number }, repo: { owner, repo }  } = context;
            github.issues.createComment({ issue_number, owner, repo, body: "Affected packages:\n${{ steps.get-packages.outputs.packages }}" });