trellis-python/.github/workflows/sync-labels.yml at main · stoicnode/trellis-python · GitHub

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name: Sync labels

# Mirrors `.github/labels.yml` to the GitHub repository's label set.
# Runs on every push to `main` that touches the source file, on PRs that
# modify it (dry-run for review), and on manual dispatch.
#
# The source file is the canonical taxonomy.

on:
  push:
    branches: [main]
    paths:
      - ".github/labels.yml"
      - ".github/workflows/sync-labels.yml"
  pull_request:
    paths:
      - ".github/labels.yml"
      - ".github/workflows/sync-labels.yml"
  workflow_dispatch:
    inputs:
      dry-run:
        description: "Preview the diff without writing to GitHub"
        type: boolean
        required: false
        default: false

permissions:
  contents: read
  issues: write
  pull-requests: write

jobs:
  sync:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      # Pull-request runs are always dry-run: we want to see the diff in
      # the workflow logs before merging, but we never mutate the repo's
      # label set from an unmerged change. Manual dispatch honours the
      # `dry-run` input so maintainers can preview ad-hoc.
      - name: Compute dry-run flag
        id: mode
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            echo "dry-run=true" >> "$GITHUB_OUTPUT"
          elif [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            echo "dry-run=${{ inputs.dry-run }}" >> "$GITHUB_OUTPUT"
          else
            echo "dry-run=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Sync labels from .github/labels.yml
        uses: crazy-max/ghaction-github-labeler@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          yaml-file: .github/labels.yml
          # Keep labels that are not in the source file (e.g. labels
          # created by external integrations or third-party bots) so the
          # sync is additive rather than destructive.
          skip-delete: true
          dry-run: ${{ steps.mode.outputs.dry-run }}