clang-format.yml

name: Clang-Format Workflow

on:
  push:
    branches: '**'
  pull_request:

env:
  LLVM_VERSION: 15

jobs:
  format:
    name: Check the formatting
    runs-on: windows-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Pin to a specific version
        run: |
          $latestChocoVersion = (Get-LatestChocoPackageVersion -TargetVersion $env:LLVM_VERSION -PackageName "llvm")
          Choco-Install -PackageName llvm -ArgumentList '--allow-downgrade', '--version', $latestChocoVersion

      - name: Run clang-format
        env:
            RED4EXT_COMMIT_BEFORE: ${{ github.event.pull_request.base.sha || github.event.before }}
            RED4EXT_COMMIT_AFTER: ${{ github.sha }}
        run: |
          $output = (git `
                      -c core.autocrlf=false `
                      -c core.eol=lf `
                      -c color.ui=always `
                      clang-format `
                        --style file `
                        --diff $env:RED4EXT_COMMIT_BEFORE $env:RED4EXT_COMMIT_AFTER
                    )?.Trim()

          Write-Output $output

          # A temporary fix for https://github.com/llvm/llvm-project/issues/56736.
          # TODO: Once LLVM 16 is released, reduce this to only the "git ... clang-format ..." command.
          if ($LASTEXITCODE -eq 1 -and !$output) {
            exit 0
          }