build.yml

# Automatically build the project and run any configured tests for every push
# and submitted pull request. This can help catch issues that only occur on
# certain platforms or Java versions, and provides a first line of defence
# against bad commits.

name: CI

on:
  push:
    branches: [main]
    paths:
      - "src/**"
      - "gradle/**"
      - "**.gradle"
      - "gradlew*"
      - "gradle.properties"
    tags-ignore:
      - "**"

  pull_request:
    paths:
      - "src/**"
      - "gradle/**"
      - "**.gradle"
      - "gradlew*"
      - "gradle.properties"

  workflow_dispatch:
  workflow_call:

jobs:
  build:
    name: Build

    strategy:
      matrix:
        java:
          - 21 # Current Java LTS & minimum supported by Minecraft
        os: [ubuntu-latest, windows-latest]

    runs-on: ${{ matrix.os }}

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

      - name: Validate Gradle wrapper
        uses: gradle/actions/wrapper-validation@v3

      - name: Setup JDK ${{ matrix.java }}
        uses: actions/setup-java@v4
        with:
          distribution: "temurin"
          java-version: ${{ matrix.java }}
          cache: "gradle"

      - name: Make Gradle wrapper executable
        if: ${{ runner.os != 'Windows' }}
        run: chmod +x ./gradlew

      - name: Build
        run: ./gradlew build

      - name: Capture build artifacts
        if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only upload artifacts built from latest java on one OS
        uses: actions/upload-artifact@v4
        with:
          name: jars
          path: build/libs/
          if-no-files-found: error