How to upload Archives for several modules by using gradle?

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1

I want to publish my SDK in maven with $ ./gradlew uploadArchives

I had this project structure:

MyProject

  |_ SDK
     |_ src
         |_ main
              |_ java
                   |_ java files
     |_ build.gradle
  |_ gradle
        |_ gradle-publish.gradle

I used following code (gradle-publish.gradle) that works as expected:

task androidJavadocsJar(type: Jar, dependsOn: androidJavadocs) {
    classifier = 'javadoc'
    from androidJavadocs.destinationDir
}

task sourcesJar(type: Jar) {
    classifier = 'sources'
    from android.sourceSets.main.java.sourceFiles
}

uploadArchives {
    repositories {
        mavenDeployer {
         /* ... */
        }
    }
}

artifacts {
    archives sourcesJar
    archives androidJavadocsJar
}

Now I splitted main module to 2: SDK and new_module so my project structure looks like:

MyProject

  |_ SDK
     |_ src
         |_ main
              |_ java
                   |_ java files  "com.app"
     |_ build.gradle

 |_ new_module
     |_ src
         |_ main
              |_ java
                   |_ java files "com.app.mod"
      |_ build.gradle
  |_ gradle
        |_ gradle-publish.gradle

However no matter what I do, I always get only SDK sources and not new_module a.e. com.app should be merged with com.app.mod

I tried to play with sourceSets but it looks like it works inside main module SDK and not under root project:

sourceSets {
 main{
    java {
        srcDirs(
                "src/main/java",
                 "../new_module/src/main/java"
        )
    }
}

and:

task sourcesJar(type: Jar) {
   classifier = 'sources'   
   from android.sourceSets.main.java.srcDirs    
}

Any ideas, tips?