name: Check extern C guards

on:
  push:
    branches-ignore:
      - 'iar/**'
    paths:
      - '**.h'
      - '.extern_c_ignore'
      - 'tools/check_extern_c_guards.py'
      - '.github/workflows/check-extern-c-guards.yml'
  pull_request:
    paths:
      - '**.h'
      - '.extern_c_ignore'
      - 'tools/check_extern_c_guards.py'
      - '.github/workflows/check-extern-c-guards.yml'

jobs:
  check-guards:
    if: github.repository_owner == 'raspberrypi'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repo
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Check extern C guards
        run: |
          python3 tools/check_extern_c_guards.py \
            --match "**/include/pico/**" \
            --ignore-list .extern_c_ignore \
            .