# Inspired by LLVM's pr-code-format.yml at 
# https://github.com/llvm/llvm-project/blob/main/.github/workflows/pr-code-format.yml

name: "Check code formatting"
on:
  pull_request:
    branches:
      - main

jobs:
  code_formatter:
    runs-on: [self-hosted, X64]
    if: github.repository == 'FEX-Emu/FEX'

    steps:
      - name: Fetch FEX sources
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      - name: Checkout through merge base
        uses: rmacklin/fetch-through-merge-base@v0
        timeout-minutes: 3
        with:
          base_ref: ${{ github.event.pull_request.base.ref }}
          head_ref: ${{ github.event.pull_request.head.sha }}
          deepen_length: 500

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v39
        with:
          separator: ","
          skip_initial_fetch: true

      - name: "Listed files"
        env:
          CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
        run: |
          echo "Formatting files:"
          echo "$CHANGED_FILES"

      - name: Check for correct clang-format version
        run: clang-format --version | grep -qF '16.0.6'

      - name: Check git-clang-format-16 exists
        run: which git-clang-format-16

      - name: Setup Python env
        uses: actions/setup-python@v4
        with:
          python-version: '3.11'
          cache: 'pip'
          cache-dependency-path: './External/code-format-helper/requirements_formatting.txt'

      - name: Install python dependencies
        run: pip install -r ./External/code-format-helper/requirements_formatting.txt

      - name: Run code formatter
        env:
          CLANG_FORMAT_PATH: 'git-clang-format-16'
          GITHUB_PR_NUMBER: ${{ github.event.pull_request.number }}
          START_REV: ${{ github.event.pull_request.base.sha }}
          END_REV: ${{ github.event.pull_request.head.sha }}
          CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
        # TODO(pmatos): Once we adopt v18, we should be able
        # to take advantage of the new --diff_from_common_commit option
        # explicitly in code-format-helper.py and not have to diff starting at
        # the merge base.
        run: |
          python ./External/code-format-helper/code-format-helper.py \
            --repo "FEX-emu/FEX" \
            --issue-number $GITHUB_PR_NUMBER \
            --start-rev $(git merge-base $START_REV $END_REV) \
            --end-rev $END_REV \
            --changed-files "$CHANGED_FILES"