# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
# Exceptions. See /LICENSE for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

name: 'Clang Tidy (clangd)'

on:
  push:
    branches: [trunk, action-test]
  pull_request:
  # TODO: Don't run in merge_group until we're ready to replace clang-tidy.
  # merge_group:

permissions:
  contents: read # For actions/checkout.
  pull-requests: read # For dorny/paths-filter to read pull requests.

# Cancel previous workflows on the PR when there are multiple fast commits.
# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#concurrency
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
  cancel-in-progress: true

jobs:
  clangd-tidy:
    runs-on: ubuntu-22.04

    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
        with:
          egress-policy: block
          # When adding endpoints, see README.md.
          # prettier-ignore
          allowed-endpoints: >
            *.dl.sourceforge.net:443
            api.github.com:443
            bcr.bazel.build:443
            downloads.sourceforge.net:443
            github.com:443
            mirrors.kernel.org:443
            nodejs.org:443
            oauth2.googleapis.com:443
            objects.githubusercontent.com:443
            pypi.org:443
            releases.bazel.build:443
            sourceforge.net:443
            storage.googleapis.com:443

      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

      - id: filter
        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
        with:
          filters: |
            has_cpp:
              - added|modified: '{**/*.cpp,**/*.h}'
          list-files: 'shell'

      - uses: ./.github/actions/build-setup-common
        if: steps.filter.outputs.has_cpp == 'true'
        with:
          matrix_runner: 'ubuntu-22.04'
          remote_cache_upload: '--remote_upload_local_results=false'

      - name: Create compile commands
        if: steps.filter.outputs.has_cpp == 'true'
        run: ./scripts/create_compdb.py

      - name: Install clangd-tidy
        if: steps.filter.outputs.has_cpp == 'true'
        run: pip install clangd-tidy==1.1.0.post2

      - name: Run clangd-tidy
        if: steps.filter.outputs.has_cpp == 'true'
        env:
          FILTER_FILES: ${{ steps.filter.outputs.has_cpp_files }}
        run: |
          clangd-tidy -p . -j 10 $FILTER_FILES