actionlint.yml

name: actionlint

on:
  push:
    branches:
      - master
    paths:
      - '.github/workflows/*.ya?ml'
  pull_request:
    paths:
      - '.github/workflows/*.ya?ml'
  merge_group:

concurrency:
  group: "actionlint-${{ github.ref }}"
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

env:
  HOMEBREW_DEVELOPER: 1
  HOMEBREW_NO_AUTO_UPDATE: 1
  HOMEBREW_NO_ENV_HINTS: 1

jobs:
  workflow_syntax:
    if: github.repository_owner == 'Homebrew'
    runs-on: ubuntu-latest
    steps:
      - name: Set up Homebrew
        uses: Homebrew/actions/setup-homebrew@master
        with:
          core: false
          cask: false
          test-bot: false

      - uses: actions/checkout@v4

      - name: Set up actionlint
        run: |
          brew install actionlint shellcheck
          echo "::add-matcher::$(brew --repository)/.github/actionlint-matcher.json"

      - run: |
          # Ignore our use of a potentially null `matrix.container` in `setup-homebrew.yml`
          actionlint \
            -ignore 'image: string; options: string'