cc/build.gradle

import org.apache.tools.ant.taskdefs.condition.Os

buildscript {
  repositories {
    jcenter()
  }
  dependencies {
    classpath 'com.android.tools.build:gradle:0.+'
  }
}

def goPath = System.getenv('GOPATH')
def temporaryDirectory = file(goPath+'/pkg/build').absolutePath
def outputDirectory = file(goPath+'/bin')

apply plugin: 'com.android.application'
apply plugin: 'cpp'

buildDir temporaryDirectory

defaultTasks 'ndkBuild'

android {
  compileSdkVersion 20
  buildToolsVersion '20.0.0'
  defaultConfig.targetSdkVersion 20

  buildTypes {
    debug {
      debuggable true
      jniDebuggable true
    }
    release {
      debuggable false
      jniDebuggable false
    }
  }

  task ndkBuild(type: Exec) {
    def cmd = 'ndk-build' + (osFamily() == 'windows' ? '.cmd' : '')
    commandLine cmd, '-C', file('android').absolutePath, 'NDK_OUT='+temporaryDirectory+'/obj',
                'NDK_APP_DST_DIR='+temporaryDirectory+'/libs/$(TARGET_ARCH_ABI)', '-s'
  }

  task ndkClean(type: Exec) {
    def cmd = 'ndk-build' + (osFamily() == 'windows' ? '.cmd' : '')
    commandLine cmd, '-C', file('android').absolutePath, 'NDK_OUT='+temporaryDirectory+'/obj',
                'NDK_APP_DST_DIR='+temporaryDirectory+'/libs/$(TARGET_ARCH_ABI)', '-s', 'clean'
  }

  tasks.withType(JavaCompile) { compileTask ->
    compileTask.dependsOn ndkBuild
  }

  clean.dependsOn ndkClean
}

def osFamily() {
  if (Os.isFamily(Os.FAMILY_MAC)) return 'mac'
  if (Os.isFamily(Os.FAMILY_UNIX)) return 'linux'
  if (Os.isFamily(Os.FAMILY_WINDOWS)) return 'windows'
  return null
}