linter.yml

name: Lint Code Base
on: [pull_request]

jobs:
  build:
    name: Lint Code Base
    runs-on: ${{ (github.repository == 'numworks/epsilon-internal') && 'self-hosted' || 'ubuntu-latest' }}

    steps:
      - name: Fetch target branch and PR branch
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Find most recent ancestor of PR and target branch
        id: common_ancestor
        run: echo "commit_sha=$(git merge-base ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }})" >> $GITHUB_OUTPUT

      - name: Checkout code
        uses: actions/checkout@v3
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          submodules: false

      # TODO Only install clang-format
      - name: Install dependencies
        uses: numworks/setup-llvm@latest

      - name: Lint files changed by PR
        run: make format BASE=${{ steps.common_ancestor.outputs.commit_sha }} CXXFORMATARGS="--dry-run --Werror"