[ADD] buildJar command

build.gradle

@@ -14,6 +14,14 @@ repositories {
     mavenCentral()
 }
 
+apply plugin: 'java'
+mainClassName = 'Main'
+
+jar {
+    manifest {
+        attributes 'Main-Class': "$mainClassName"
+    }
+}
 
 sourceSets {
     main {
@@ -22,11 +30,20 @@ sourceSets {
         }
         resources {
             srcDirs = ['resources']
-        }	
+        }
     }
 }
-mainClassName = 'Main'
 
 javafx {
     modules = ['javafx.controls', 'javafx.base', 'javafx.graphics', 'javafx.web', 'javafx.swing', 'javafx.media']
 }
+
+task buildJar(type: Jar) {
+    manifest.from jar.manifest
+    classifier = 'all'
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    from {
+        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
+    }
+    with jar
+}
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