label-checker.yml

name: label-checker

# Dependabot
# gh label create --force "dependencies" --description "Pull requests that update a dependency file" --color 0366D6
# gh label create --force "go" --description "Pull requests that update Go code" --color 16E2E2
# gh label create --force "github_actions" --description "Pull requests that update GitHub Actions code" --color 000000
# gh label create --force "docker" --description "Pull requests that update Docker code" --color 21CEFF

# Commit prefix
# gh label create --force "BREAKING CHANGE" --description "BREAKING CHANGES" --color FF0303
# gh label create --force "build" --description "Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)" --color 5319E7
# gh label create --force "ci" --description "Changes to our CI configuration files and scripts (examples: CircleCi, SauceLabs)" --color 53C4EE
# gh label create --force "docs" --description "Documentation only changes" --color 1B3E44
# gh label create --force "feat" --description "A new feature" --color 0EAA80
# gh label create --force "fix" --description "A bug fix" --color 1D76DB
# gh label create --force "perf" --description "A code change that improves performance" --color A2EEEF
# gh label create --force "refactor" --description "A code change that neither fixes a bug nor adds a feature" --color C5DEF5
# gh label create --force "test" --description "Adding missing tests or correcting existing tests" --color 1D76DB
# gh label create --force "chore" --description "Changes to the build process or auxiliary tools and libraries such as documentation generation" --color 20313F

on:
  pull_request:
    types:
      - opened
      - edited
      - labeled
      - unlabeled
      - ready_for_review
      - reopened
      - synchronize

env:
  LABELS: "BREAKING CHANGE,build,ci,docs,feat,fix,perf,refactor,test,chore"

jobs:
  check:
    name: Check labels
    runs-on: ubuntu-latest
    timeout-minutes: 10
    permissions:
      id-token: write
      contents: read
      pull-requests: write # required to add labels
      statuses: read
      checks: read
      repository-projects: read
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }} # needed for gh pr view
      - name: Check labels
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        shell: bash
        run: |
          # Check labels
          set -Eeuo pipefail -x

          # If any of the labels are present, exit with success
          if [[ -n "$(gh pr view --json labels --jq ".labels[].name" | grep -E "^($(tr , "|" <<<"${LABELS:?}"))$")" ]]; then
            exit 0
          fi

          # Add labels based on PR title
          GH_PR_TITLE=$(gh pr view --json title --jq .title)
          gh label list --json name --jq ".[].name" | while read -r LINE; do
            awk -F: "/^${LINE-}(\([^\)]+\))?:/ {print \$1}" <<<"${GH_PR_TITLE:?}" | grep -Eo "^${LINE:?}" || true # NOTE: Ignore the return value of grep because we just want to output the string
          done | xargs -t -I{} gh pr edit --add-label {}

          # If any of the labels are present, exit with success
          while read -r LINE; do
            if grep -E "^($(tr , "|" <<<"${LABELS:?}"))$" <<<"${LINE-}"; then
              exit 0
            fi
          done <<<"$(gh pr view --json labels --jq ".labels[].name")"

          # If none of the labels are present, exit with error
          exit 1