ci-format.yml

name: "format"

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
      with:
        submodules: recursive
        
    - name: Mount bazel cache
      uses: actions/cache@v3
      with:
        path: "~/.cache/bazel"  # See https://docs.bazel.build/versions/master/output_directories.html
        key: format-${{ hashFiles('**/*_deps.bzl', '**/*.bazelrc') }}
        restore-keys: |
          format
        
    - name: Run format.sh
      run: ./format.sh

    - name: Check formatting diff
      run: |
        CHANGED_FILES="$(git diff-index --name-only HEAD --)"
        if [[ -z "${CHANGED_FILES}" ]]; then
          echo "Success: no formatting changes needed."
          exit 0
        fi
        echo "Found formatting changes in the following files:"
        echo "${CHANGED_FILES}"
        echo ""
        echo "Please run format.sh to apply the changes."
        exit 1