gistfile1.txt

// This is an aar, we'll ignore resources, and extract clases.jar
        def outputDirName = "${buildDir}\\unpacked\\dist\\extracted"

        System.out.println('Start')
        print(file(outputDirName).list())

        def extract = project.tasks.create "jarExtract${it.name.capitalize()}", Copy
        extract.from it
        extract.into outputDirName
        extract.execute()

        System.out.println('Extracted AAR')
        print(file(outputDirName).list())

        def extractClasses = project.tasks.create "jarExtractClasses${it.name.capitalize()}", Copy
        extractClasses.from outputDirName + '\\classes.jar'
        extractClasses.into outputDirName
        extractClasses.execute()

        System.out.println(outputDirName + '\\classes.jar')

        System.out.println('Extracted Classes')
        print(file(outputDirName).list())

        fileTree(outputDirName).matching {
          exclude 'R.txt'
          exclude 'AndroidManifest.xml'
          exclude 'assets/'
          exclude 'libs/'
          exclude 'res/'
          exclude 'aidl/'
          exclude 'classes.jar'
          exclude '*.aar'
        }
      }

gistfile2.txt

// This is an aar, we'll ignore resources, and extract clases.jar
        zipTree(it).matching {
          exclude 'R.txt'
          exclude 'AndroidManifest.xml'
          exclude 'assets/'
          exclude 'res/'
          exclude 'aidl/'
          exclude 'libs/' // not sure where these are from, probably being duplicated through javaCompile and configurations.compile
        }.visit {
          if (!it.name.endsWith('.jar')) {
            def extractJar = project.tasks.create "extractJar${it.name.capitalize()}", Copy
            extractJar.from it
            System.out.println(packageJar.destinationDir)
            extractJar.into packageJar.destinationDir
            extractJar.execute()
          }
        }

gistfile3.txt

// This is an aar, we'll ignore resources, and extract clases.jar
        def outputDirName = "${buildDir}\\unpacked\\dist\\extracted"

        System.out.println("output directory: " + outputDirName)
        System.out.println("AAR Package: " + it)
        System.out.println("AAR Package path: " + it.path)

        printFiles(new File(outputDirName).list())

        // Unzip the AAR, we only need src folders and classes.jar
        def extract = project.tasks.create "jarExtract${it.name.capitalize()}", Copy
        extract.from zipTree(new File(it.path)).matching {
          exclude 'R.txt'
          exclude 'AndroidManifest.xml'
          exclude 'assets/'
          exclude 'libs/'
          exclude 'res/'
          exclude 'aidl/'
          exclude 'classes.jar'
          exclude 'proguard.txt'
        }
        extract.into file(new File(outputDirName))
        extract.execute()

        printFiles(new File(outputDirName).list())

        // Unzip the classes.jar
        def extractClasses = project.tasks.create "jarExtractClasses${it.name.capitalize()}", Copy
        extractClasses.from file(new File(outputDirName, 'classes.jar'))
        extractClasses.into file(new File(outputDirName))
        extractClasses.execute()
        
        printFiles(file(new File(outputDirName)).list())

        return fileTree(outputDirName)

gistfile4.txt

def tempDir = "${buildDir}\\unpacked\\dist\\extracted"

        def extractAar = project.tasks.create "jarExtract${it.name.capitalize()}", Copy
        extractAar.from zipTree(it)
        extractAar.into file(tempDir)
        extractAar.execute()

        // fileTree(tempDir).matching { include '*.jar' }.visit { System.out.println(it) }

        def extractClassesJar = project.tasks.create "jarExtractClasses${it.name.capitalize()}",
            Copy
        extractClassesJar.from zipTree(file(tempDir + "\\classes.jar"))
        extractClassesJar.into file(tempDir)
        extractClassesJar.execute()

        return fileTree(tempDir)