KAFKA-1502 source jar is empty patch by Jun Rao reviewed by Joe Stein

build.gradle

@@ -74,7 +74,6 @@ subprojects {
     from '../NOTICE'
   }
 
-  tasks.withType(Javadoc) {
   task srcJar(type:Jar) {
     classifier = 'sources'
     from '../LICENSE'
@@ -89,32 +88,17 @@ subprojects {
     from javadoc.destinationDir
   }
 
-    task docsJar(type: Jar, dependsOn: javadocJar) { }
+  task docsJar(dependsOn: javadocJar)
 
   artifacts {
     archives srcJar
     archives javadocJar
   }
-  }
   
-  tasks.withType(ScalaCompile) {
-    task srcJar(type:Jar, overwrite: true) {
-      classifier = 'sources'
-      from '../LICENSE'
-      from '../NOTICE'
-      from sourceSets.main.scala
-      from sourceSets.main.java
-    }
+  plugins.withType(ScalaPlugin) {
+    //source jar should also contain scala source:
+    srcJar.from sourceSets.main.scala
 
-    scalaCompileOptions.useAnt = false
-
-    configure(scalaCompileOptions.forkOptions) {
-      memoryMaximumSize = '1g'
-      jvmArgs = ['-XX:MaxPermSize=512m']
-    }
-  }
-
-  tasks.withType(ScalaDoc) {
     task scaladocJar(type:Jar) {
       classifier = 'scaladoc'
       from '../LICENSE'
@@ -122,12 +106,22 @@ subprojects {
       from scaladoc
     }
 
-    task docsJar(type: Jar, dependsOn: ['javadocJar', 'scaladocJar'], overwrite: true) { }
+    //documentation task should also trigger building scala doc jar
+    docsJar.dependsOn scaladocJar
 
     artifacts {
       archives scaladocJar
     }
   }
+
+  tasks.withType(ScalaCompile) {
+    scalaCompileOptions.useAnt = false
+
+    configure(scalaCompileOptions.forkOptions) {
+      memoryMaximumSize = '1g'
+      jvmArgs = ['-XX:MaxPermSize=512m']
+    }
+  }
 }
 
 for ( sv in ['2_9_1', '2_9_2', '2_10_1', '2_11'] ) {