Build: Enable GitHub Actions based CI #4

	name: Build & Publish

	on:
	push:
	branches:
	- master
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v1
	- uses: actions/setup-java@v3
	with:
	distribution: temurin
	java-version: \|
	8
	16
	17
	cache: gradle

	- name: Setup environment
	run: \|
	echo "ORG_GRADLE_PROJECT_BUILD_ID=$(expr ${{ github.run_number }} + 290)" >> "$GITHUB_ENV"
	# GitHub runners are limited to 7GB of RAM, so we'll limit our Gradle Daemon process to about half of that
	# which is enough so long as parallel task execution is limited.
	# We also pin the amount of workers, so it doesn't break should GitHub increase the default available vCPUs.
	# We write these to GRADLE_USER_HOME to overrule the local "gradle.properties" of the project.
	mkdir -p "${GRADLE_USER_HOME:=~/.gradle}"
	echo "org.gradle.jvmargs=-Xmx4G" >> "$GRADLE_USER_HOME/gradle.properties"
	echo "org.gradle.workers.max=2" >> "$GRADLE_USER_HOME/gradle.properties"

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

	- name: Publish
	run: echo ./gradlew publish --stacktrace
	if: env.NEXUS_USER != null
	env:
	NEXUS_USER: ${{ secrets.NEXUS_USER }}
	NEXUS_PASSWORD: ${{ secrets.NEXUS_PASSWORD }}

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