try basic support for gradle

.github/workflows/gradle.yml

@@ -0,0 +1,37 @@
+name: gradle
+on:
+  push:
+    braches:
+    - master
+  pull_request:
+    braches:
+    - master
+
+jobs:
+  gradle:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: 17
+
+      - uses: gradle/gradle-build-action@v2
+        with:
+          arguments: check
+
+      - uses: gradle/gradle-build-action@v2
+        with:
+          arguments: jar
+
+      - uses: gradle/gradle-build-action@v2
+        with:
+          arguments: shadowJar
+
+      - uses: actions/upload-artifact@v4
+        with:
+          path: build/libs/

.gitignore

@@ -1,6 +1,7 @@
 out
 .idea
 *.class
+.gradle
 
 # Build products
 build

build.gradle

@@ -0,0 +1,40 @@
+plugins {
+	id 'application'
+	id 'java'
+	id 'com.github.johnrengelman.shadow' version '8.1.1'
+}
+
+java {
+	sourceCompatibility = '1.8'
+	targetCompatibility = '1.8'
+	archivesBaseName = 'rars'
+}
+
+repositories {
+	mavenCentral()
+	gradlePluginPortal()
+}
+
+dependencies {
+	var flatlafVersion = "3.4"
+	implementation( "com.formdev:flatlaf:${flatlafVersion}" )
+	implementation( "com.formdev:flatlaf:${flatlafVersion}:linux-x86_64@so" )
+	implementation( "com.formdev:flatlaf:${flatlafVersion}:macos-arm64@dylib" )
+	implementation( "com.formdev:flatlaf:${flatlafVersion}:macos-x86_64@dylib" )
+	implementation( "com.formdev:flatlaf:${flatlafVersion}:windows-x86_64@dll" )
+}
+
+sourceSets.main {
+	java.srcDirs = ['src/']
+	resources.srcDirs = ["src/"]
+}
+
+application {
+	mainClass = 'rars.Launch'
+}
+
+jar {
+	manifest {
+		attributes 'Main-Class': 'rars.Launch'
+	}
+}