auto-format.yml

# Repo-owned auto-format: label a pull request `fix-lint` (the label ships
# with the template's settings.yml) and this workflow pushes a formatting
# commit to the PR branch, then removes the label. Generated once by
# Vivswan/repo-platform and never overwritten by template
# sync: adjust the format commands to this repository's tooling.

name: Auto Format

on:
  pull_request:
    types: [labeled]

permissions:
  contents: read

jobs:
  format:
    # Same-repo PRs only: GITHUB_TOKEN cannot push to a fork's branch, and
    # PR-controlled tool configuration should not run next to write
    # credentials (checkout below persists none; the push step scopes them).
    if: github.event.label.name == 'fix-lint' && github.event.pull_request.head.repo.full_name == github.repository
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: actions/checkout@v7
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          persist-credentials: false

      - uses: oven-sh/setup-bun@v2
      - name: Format (biome)
        run: bun x @biomejs/biome check --write .

      - name: Commit and push changes
        env:
          GH_TOKEN: ${{ github.token }}
          HEAD_REF: ${{ github.event.pull_request.head.ref }}
        run: |
          if git diff --quiet; then
            echo "nothing to format"
          else
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            git add -A
            git commit -m "style: apply automated formatting"
            git push "https://x-access-token:${GH_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" HEAD:"$HEAD_REF"
          fi
      # The label is a one-shot request: remove it even when a step failed,
      # so a broken run cannot loop.
      - name: Remove the fix-lint label
        if: always()
        env:
          GH_TOKEN: ${{ github.token }}
          PR_URL: ${{ github.event.pull_request.html_url }}
        run: gh pr edit "$PR_URL" --remove-label fix-lint