name: Build

on:
  push:
    branches-ignore:
      - artifacts
  pull_request:
  workflow_dispatch:

permissions:
  contents: write

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Java 21
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: "21"

      - name: Make Gradle wrapper executable
        run: chmod +x ./gradlew

      - name: Build
        run: ./gradlew build --no-daemon

      - name: Publish jar to artifacts branch
        if: github.event_name != 'pull_request'
        shell: bash
        run: |
          set -euo pipefail

          mkdir -p /tmp/worldhandler-artifacts
          cp build/libs/*.jar /tmp/worldhandler-artifacts/

          git config user.name "Gitea Actions"
          git config user.email "actions@gitea.local"

          git fetch origin artifacts || true
          git switch --force-create artifacts
          git rm -rf .

          cp /tmp/worldhandler-artifacts/*.jar .
          cat > README.md <<'EOF'
          # WorldHandler build artifacts

          This branch is maintained by the Gitea runner.
          Download the jar file from this branch.
          EOF

          git add README.md *.jar
          git commit --allow-empty -m "Publish WorldHandler jar from ${GITHUB_SHA}"
          git push --force origin artifacts