clang-format-checker.yml

name: "Check code formatting"
on: 
  pull_request_target:
    types: [opened,synchronize]
  issue_comment:
    types: edited

jobs:
  code_formatter:
    if: github.event_name == 'pull_request_target'
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - name: Fetch DirectXShaderCompiler sources
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      - name: Checkout through merge base
        uses: rmacklin/fetch-through-merge-base@bfe4d03a86f9afa52bc1a70e9814fc92a07f7b75 # v0.3.0
        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: step-security/changed-files@3dbe17c78367e7d60f00d78ae6781a35be47b4a1 # v45.0.1
        with:
          separator: ","
          skip_initial_fetch: true

      # We need to pull the script from the main branch, so that we ensure
      # we get the latest version of this script.
      - name: Fetch code formatting utils
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          repository: microsoft/DirectXShaderCompiler
          ref: ${{ github.base_ref }}
          sparse-checkout: |
            utils/git/requirements_formatting.txt
            utils/git/code-format-helper.py
            utils/git/code-format-save-diff.py
          sparse-checkout-cone-mode: false
          path: code-format-tools

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

      - name: Install clang-format
        uses: aminya/setup-cpp@v1
        with:
          clangformat: 17.0.1

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

      - name: Install python dependencies
        run: pip install -r code-format-tools/utils/git/requirements_formatting.txt

      - name: Run code formatter
        id: formatter
        env:
          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 }}
        run: |
           python code-format-tools/utils/git/code-format-helper.py \
            --token ${{ secrets.GITHUB_TOKEN }} \
            --issue-number $GITHUB_PR_NUMBER \
            --start-rev $START_REV \
            --end-rev $END_REV \
            --changed-files "$CHANGED_FILES"
  apply_diff:
    if: ${{ github.event_name == 'issue_comment' && endsWith(github.event.comment.body, '- [x] Check this box to apply formatting changes to this branch.') }}
    runs-on: ubuntu-latest
    env:
      TMP_DIFF_FILE: /tmp/diff.patch
    permissions:
      pull-requests: write
      contents: write
    steps:
      - uses: actions/github-script@v3
        id: get-pr
        with:
          script: |
            const request = {
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number
            }
            core.info(`Getting PR #${request.pull_number} from ${request.owner}/${request.repo}`)
            try {
              const result = await github.pulls.get(request)
              return result.data
            } catch (err) {
              core.setFailed(`Request failed with error ${err}`)
            } 
      
      # We need to pull the script from the main branch, so that we ensure
      # we get the latest version of this script.
      - name: Fetch code formatting utils
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          repository: microsoft/DirectXShaderCompiler
          ref: ${{ github.base_ref }}
          sparse-checkout: |
            utils/git/requirements_formatting.txt
            utils/git/code-format-helper.py
            utils/git/code-format-save-diff.py
          sparse-checkout-cone-mode: false
          path: code-format-tools

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

      - name: Install python dependencies
        run: pip install -r code-format-tools/utils/git/requirements_formatting.txt

      - name: Apply code diff
        env:
          GITHUB_PR_NUMBER: ${{ github.event.issue.number }}
          COMMENT_ID: ${{ github.event.comment.id }}
        run: |
          python code-format-tools/utils/git/code-format-save-diff.py \
            --token ${{ secrets.GITHUB_TOKEN }} \
            --issue-number $GITHUB_PR_NUMBER \
            --tmp-diff-file $TMP_DIFF_FILE \
            --comment-id $COMMENT_ID

      - name: Fetch LLVM sources for head
        uses: actions/checkout@v4
        with:
          fetch-depth: 2
          ref: ${{ fromJSON(steps.get-pr.outputs.result).head.ref }}
          repository: ${{ fromJSON(steps.get-pr.outputs.result).head.repo.full_name }}

      - name: apply diff
        run: |
          git apply $TMP_DIFF_FILE
          git add .

      - name: Commit & Push changes
        uses: actions-js/push@master
        with:
          branch: ${{ fromJSON(steps.get-pr.outputs.result).head.ref }}
          repository: ${{ fromJSON(steps.get-pr.outputs.result).head.repo.full_name }}
          github_token: ${{ secrets.GITHUB_TOKEN }}