[FEATURE] Multi-Release JAR и компиляция только на Java 11+

.gitlab-ci.yml

@@ -11,7 +11,7 @@ stages:
   - test
 
 build:
-  image: frekele/java
+  image: java:11
   stage: build
   before_script:
     - apt-get -y update
@@ -43,7 +43,7 @@ build:
       - artifacts
 
 test:
-  image: frekele/java
+  image: java:11
   stage: test
   script:
     - ./gradlew check

Launcher/build.gradle

@@ -1,3 +1,6 @@
+plugins {
+    id 'org.openjfx.javafxplugin' version '0.0.5'
+}
 apply plugin: 'com.github.johnrengelman.shadow'
 
 String mainClassName = "pro.gravit.launcher.ClientLauncherWrapper"
@@ -8,7 +11,10 @@
         url "http://repo.spring.io/plugins-release/"
     }
 }
-
+javafx {
+    version = "12"
+    modules = [ 'javafx.controls', 'javafx.fxml' ]
+}
 sourceCompatibility = '1.8'
 targetCompatibility = '1.8'
 

LauncherCore/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'java-library'
 sourceCompatibility = '1.8'
 targetCompatibility = '1.8'
 
@@ -17,10 +18,26 @@
         events "passed", "skipped", "failed"
     }
 }
-
+sourceSets {
+    java9 {
+        java {
+            srcDirs = ['src/main/java9']
+        }
+        dependencies {
+            java9Implementation files(sourceSets.main.output.classesDirs) { builtBy compileJava }
+        }
+    }
+}
 jar {
+    into('META-INF/versions/9') {
+        from sourceSets.java9.output
+    }
     classifier = 'clean'
 }
+compileJava9Java {
+    sourceCompatibility = 9
+    targetCompatibility = 9
+}
 
 task sourcesJar(type: Jar) {
     from sourceSets.main.allJava

LauncherCore/src/main/java/pro/gravit/utils/helper/JVMHelper.java

@@ -59,6 +59,17 @@ public static OS byName(String name) {
 
     public static final ClassLoader LOADER = ClassLoader.getSystemClassLoader();
 
+    public static final int JVM_VERSION = getVersion();
+    public static int getVersion() {
+        String version = System.getProperty("java.version");
+        if(version.startsWith("1.")) {
+            version = version.substring(2, 3);
+        } else {
+            int dot = version.indexOf(".");
+            if(dot != -1) { version = version.substring(0, dot); }
+        } return Integer.parseInt(version);
+    }
+
     static {
         try {
             MethodHandles.publicLookup(); // Just to initialize class