name: Check License Headers
permissions:
  contents: read

on:
  pull_request:
    branches:
      - master

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    name: Check License Headers
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6

      - name: Cache Maven packages
        uses: actions/cache@v5
        with:
          path: ~/.m2
          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
          restore-keys: |
            ${{ runner.os }}-maven-

      - name: Set up Java
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          java-version: 25
          cache: maven

      - name: Check license headers
        run: xvfb-run mvn -B license:check