compile project(":web-portal-frontend")
...
def generatedDir = new File(buildDir, "generated/source")

apply plugin: "java"

sourceSets {
  generated {
    java.srcDirs = ["$generatedDir/main", "$generatedDir/test"]
  }
  main {
    java.srcDirs = ["$generatedDir/main", "src/main/java"]
    resources.srcDirs = ["src/main/resources"]
  }
  test {
    java.srcDirs = ["$generatedDir/test", "src/test/java"]
    resources.srcDirs = ["src/test/resources"]
  }
}

compileJava {
  sourceCompatibility = "1.8"
  targetCompatibility = "1.8"
  options.encoding = "UTF-8"
  options.compilerArgs = ["-Xlint:all"]
  dependsOn(processResources)
}

jar {
}

def generatedDir = new File(buildDir, "generated/source")

apply plugin: "java"

sourceSets {
  generated {
    java.srcDirs = ["$generatedDir/main", "$generatedDir/test"]
  }
  main {
    java.srcDirs = ["$generatedDir/main", "src/main/java"]
    resources.srcDirs = ["src/main/resources"]
  }
  test {
    java.srcDirs = ["$generatedDir/test", "src/test/java"]
    resources.srcDirs = ["src/test/resources"]
  }
}

compileJava {
  sourceCompatibility = "1.8"
  targetCompatibility = "1.8"
  options.encoding = "UTF-8"
  options.compilerArgs = ["-Xlint:all"]
  dependsOn(processResources)
}

jar {
  from sourceSets.main.allSource
  from sourceSets.generated.allSource
}