name: gMod Lint

on:
  pull_request:
    branches:
      - master
  push:
    branches:
      - dev
  workflow_dispatch:

permissions:
  contents: write

jobs:
  clang-format:
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          ref: ${{ github.head_ref || github.ref_name }}

      # Pinned to the version the tree was formatted with so CI and local agree.
      - name: Install clang-format
        run: pipx install clang-format==22.1.5

      - name: Apply clang-format
        run: clang-format -i header/*.h source/*.cpp modules/*.ixx TpfConvert/src/*.ixx

      # Push / same-repo PRs: commit the fixes back. Fork PRs can't be pushed to,
      # so fail the check instead and let the contributor format.
      - name: Commit fixes
        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
        uses: stefanzweifel/git-auto-commit-action@v5
        with:
          commit_message: "ci: apply clang-format"
      - name: Verify formatting (fork PRs)
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository
        run: git diff --exit-code