label-pr.yml

# This workflow auto-labels PRs based on various criteria:
# - If a PR is opened or a new commit is pushed:
#   - The workflow runs auto-label.cjs to add scope-related labels and to add 'needs-review'
#     (unless the PR already has an approving review from a maintainer).
#   - The workflow will check for linked issues and add the 'fix-me' label to them.
# - If a review (approving or otherwise) is added to the PR by a maintainer, the workflow
#   removes the 'needs-review' label.
# - If 'auto merge' is enabled or disabled on the PR, the workflow adds/removes the
#   'auto-merge' label.
name: PR Auto Label

on:
  pull_request_target:
    types:
      - edited
      - synchronize
      - opened
      - reopened
      - auto_merge_enabled
      - auto_merge_disabled
      - ready_for_review
  # Use the 'workflow_run' event as a workaround/hook to catch runs of the 'PR Review' workflow.
  # See `label-pr-review.yml` comments for more info about why these gymnastics are necessary.
  workflow_run:
    workflows:
      - PR Review
    types:
      - completed

jobs:
  job_picker:
    runs-on: ubuntu-latest
    outputs:
      run: ${{ steps.label_job.outputs.run }}
    steps:
      - name: Determine label job
        id: label_job
        shell: bash
        run: |
          if [ "${{ contains(github.event.action,'auto_merge_') }}" == "true" ]; then
              echo "run=auto_merge" >> $GITHUB_OUTPUT
          elif [ "${{ github.event.action }}" == "completed" ]; then
              echo "run=pr_review" >> $GITHUB_OUTPUT
          elif [ "${{ github.event.action }}" == "ready_for_review" ]; then
              echo "run=pr_ready" >> $GITHUB_OUTPUT
          else
              echo "run=push_commit" >> $GITHUB_OUTPUT
          fi

  auto_merge:
    runs-on: ubuntu-latest
    needs: job_picker
    if: needs.job_picker.outputs.run == 'auto_merge'
    steps:
      - name: Add auto-merge label
        uses: buildsville/add-remove-label@v2.0.1
        if: github.event.action == 'auto_merge_enabled'
        with:
          token: ${{secrets.GITHUB_TOKEN}}
          labels: auto-merge
          type: add

      - name: Remove auto-merge label
        uses: buildsville/add-remove-label@v2.0.1
        if: github.event.action == 'auto_merge_disabled'
        with:
          token: ${{secrets.GITHUB_TOKEN}}
          labels: auto-merge
          type: remove

  pr_review:
    runs-on: ubuntu-latest
    needs: job_picker
    if: needs.job_picker.outputs.run == 'pr_review'
    steps:
      - uses: actions/checkout@v3
        with:
          # Force checkout the main repo (base branch) so that repo secrets
          # are not available to unexpected/malicious PR code.
          ref: main

      - uses: ./.github/actions/setup-js-env

      - name: Update PR Review Labels
        run: |
          node .github/scripts/pr-review.cjs
        env:
          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}

  pr_ready:
    runs-on: ubuntu-latest
    needs: job_picker
    if: needs.job_picker.outputs.run == 'pr_ready'
    steps:
      - name: Add needs-review label
        uses: buildsville/add-remove-label@v2.0.1
        with:
          token: ${{secrets.GITHUB_TOKEN}}
          labels: needs-review
          type: add

  push_commit:
    runs-on: ubuntu-latest
    needs: job_picker
    if: needs.job_picker.outputs.run == 'push_commit'
    steps:
      - uses: actions/checkout@v3
        with:
          # Force checkout the main repo (base branch) so that repo secrets
          # are not available to unexpected/malicious PR code.
          ref: main

      - name: Check for linked issues
        id: find-linked-issues
        uses: mondeja/pr-linked-issues-action@v2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Label linked issues
        if: join(steps.find-linked-issues.outputs.issues) != ''
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "Found linked issues: ${{ steps.find-linked-issues.outputs.issues }}"
          issues=${{ steps.find-linked-issues.outputs.issues }}
          for issue in ${issues//,/ }; do
            echo "Adding 'fix-me' label to issue $issue"
            gh issue edit $issue --add-label "fix-me"
          done

      - uses: ./.github/actions/setup-js-env

      - name: Run Label Script
        run: |
          node .github/scripts/auto-label.cjs
        env:
          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
          PR_NUMBER: ${{ github.event.number }}