name: Lint GitHub Actions workflows
on:
  push:
    branches:
      - "main"
    paths:
      - '.github/workflows/*.ya?ml'
      - '.github/workflows/actionlint.*'
  pull_request:
    branches:
      - "main"
    paths:
      - '.github/workflows/*.ya?ml'
      - '.github/workflows/actionlint.*'

env:
  LC_ALL: en_US.UTF-8

defaults:
  run:
    shell: bash

permissions:
  contents: read

jobs:
  actionlint:
    runs-on: ubuntu-latest
    steps:
      - name: "Checkout"
        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
        with:
          fetch-depth: 0

      - name: "Run actionlint"
        run: |
          echo "::add-matcher::.github/workflows/matchers/actionlint.json"
          tools/actionlint.sh -color
