name: Lint GitHub Workflows

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

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

jobs:
  check-permissions:
    if: ${{ !contains(github.event.pull_request.labels.*.name, 'run-no-ci') }}
    uses: ./.github/workflows/check-permissions.yml
    with:
      github-event-name: ${{ github.event_name}}

  actionlint:
    needs: [ check-permissions ]
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v4
      - uses: reviewdog/action-actionlint@v1
        env:
          # SC2046 - Quote this to prevent word splitting. - https://www.shellcheck.net/wiki/SC2046
          # SC2086 - Double quote to prevent globbing and word splitting. - https://www.shellcheck.net/wiki/SC2086
          SHELLCHECK_OPTS: --exclude=SC2046,SC2086
        with:
          fail_on_error: true
          filter_mode: nofilter
          level: error

      - name: Disallow 'ubuntu-latest' runners
        run: |
          PAT='^\s*runs-on:.*-latest'
          if grep -ERq $PAT .github/workflows; then
            grep -ERl $PAT .github/workflows |\
            while read -r f
            do
              l=$(grep -nE $PAT $f | awk -F: '{print $1}' | head -1)
              echo "::error file=$f,line=$l::Please use 'ubuntu-22.04' instead of 'ubuntu-latest'"
            done
            exit 1
          fi