name: Style Check

on:
  pull_request:
    paths-ignore:
      - '.3rd-party/**'
      - 'docs/**'
      - '**.md'
  workflow_dispatch:

permissions:
  contents: read

jobs:
  style_check:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v6.0.3
        with:
          repository: ${{ inputs.repository }}
          ref: ${{ inputs.ref }}

      - name: Set up JDK
        uses: actions/setup-java@v5.2.0
        with:
          distribution: 'temurin'
          java-version: 21
          cache: 'maven'

      - name: Check code style
        run:  |
          # compare style to target branch
          git remote add target ${{ github.event.pull_request.base.repo.clone_url }}
          git fetch target
          mvn spotless:check -DratchetFrom=${{ github.event.pull_request.base.sha }}