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path: root/.github/workflows/build.yml
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# Here lie dragons!
#
# This action either builds the server or
# builds a paperclip jar to be updated in the body
# of the PR relating to this action.

name: Build Paper
on:
  push:
  pull_request:
    types:
      - opened
      - reopened
      - synchronize
      - labeled

jobs:
  build:
    # Run on all label events (won't be duplicated) or all push events or on PR syncs not from the same repo
    if: (github.event_name == 'pull_request' && github.event.action == 'labeled') || github.event_name != 'pull_request' || github.repository != github.event.pull_request.head.repo.full_name
    runs-on: ubuntu-latest
    strategy:
      matrix:
        java: [17]
      fail-fast: true
    steps:
      - uses: actions/checkout@v4
      - name: JDK ${{ matrix.java }}
        uses: actions/setup-java@v4
        with:
          java-version: ${{ matrix.java }}
          distribution: 'temurin'

      - name: Validate Gradle wrapper
        uses: gradle/wrapper-validation-action@v2
      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v3

      - name: Configure Build
        uses: actions/github-script@v7
        id: determine
        with:
          script: |
            const {owner, repo} = context.repo;
            const event_name = "${{ github.event_name }}";
            const event = ${{ toJSON(github.event) }};
            const ref_type = "${{ github.ref_type }}";
            const ref_name = "${{ github.ref_name }}";
            const result = {
              action: "build"
            };

            if (event_name === "push" && ref_type === "branch") {
              const {data: pulls} = await github.rest.pulls.list({ owner, repo, head: `${owner}:${ref_name}`, state: "open" });
              const pull = pulls.find((pr) => !!pr.labels.find((l) => l.name === "build-pr-jar"));
              if (pull) {
                result["pr"] = pull.number;
                result["action"] = "paperclip";
                core.notice(`This is a push action but to a branch with an open PR with the build paperclip label (${JSON.stringify(result)})`);
                return result;
              }
            } else if (event_name === "pull_request" && event.pull_request.labels.find((l) => l.name === "build-pr-jar")) {
              result["pr"] = event.pull_request.number;
              result["action"] = "paperclip";
              core.notice(`This is a pull request action with a build paperclip label (${JSON.stringify(result)})`);
              return result;
            }
            core.notice("This will not build a paperclip jar");
            return result;

      - name: Apply Patches
        run: |
          git config --global user.email "no-reply@github.com"
          git config --global user.name "Github Actions"
          ./gradlew applyPatches --stacktrace

      - name: Build
        run: ./gradlew build --stacktrace

      - name: Upload Test Results
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: Test Results (${{ matrix.java }})
          path: |
            **/build/test-results/test/TEST-*.xml

      - name: Create Paperclip Jar
        if: fromJSON(steps.determine.outputs.result).action == 'paperclip'
        run: ./gradlew createReobfPaperclipJar --stacktrace

      - name: Upload Paperclip Jar
        if: fromJSON(steps.determine.outputs.result).action == 'paperclip'
        uses: actions/upload-artifact@v4
        with:
          name: paper-${{ fromJSON(steps.determine.outputs.result).pr }}
          path: build/libs/paper-paperclip-*-reobf.jar
  event_file:
    name: "Event File"
    # Only run on PRs if the source branch is on someone else's repo
    if: ${{ github.event_name != 'pull_request' || github.repository != github.event.pull_request.head.repo.full_name }}
    runs-on: ubuntu-latest
    steps:
      - name: Upload
        uses: actions/upload-artifact@v4
        with:
          name: Event File
          path: ${{ github.event_path }}