# 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'

on:
  push:
    branches: [trunk, action-test]
  pull_request:
  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:
  clang-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: test-setup
        uses: ./.github/actions/test-setup
        with:
          matrix_runner: 'ubuntu-22.04'
          base_sha:
            ${{ github.event_name == 'pull_request' &&
            github.event.pull_request.base.sha ||
            github.event.merge_group.base_sha }}
          remote_cache_key: ${{ secrets.CARBON_BUILDS_GITHUB }}
          targets_file: ${{ runner.temp }}/targets
          use_direct_targets: true

      # Run in the clang-tidy config. This is done as part of tests so that we
      # aren't duplicating bazel/llvm setup.
      #
      # The `-k` flag is used to print all clang-tidy errors.
      - name: clang-tidy
        if: steps.test-setup.outputs.has_code == 'true'
        env:
          TARGETS_FILE: ${{ runner.temp }}/targets
        run: |
          ./scripts/run_bazel.py \
              --attempts=5 \
              build --config=clang-tidy -k \
              --target_pattern_file=$TARGETS_FILE

      # See "Disk space before build" in `test-setup`.
      - name: Disk space after build
        if: steps.test-setup.outputs.has_code == 'true'
        run: df -h
