gradle default task

build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.12.2'
        compile gradleApi()

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task bumpVersion2(type: BumpVersionTask)

BumpVersionTask.groovy

// Located at: buildSrc/src/main/groovy/BumpVersionTask.groovy
class BumpVersionTask extends DefaultTask {

  @TaskAction
  def bumpVersion(String aVersionString) {
    println "***** DEBUG_jwir3: " + aVersionString
  }
}

error

startup failed:
/Users/scottjohnson/Source/core-android/buildSrc/src/main/groovy/BumpVersionTask.groovy: 1: unable to resolve class DefaultTask 
 @ line 1, column 1.
   class BumpVersionTask extends DefaultTask {
   ^

/Users/scottjohnson/Source/core-android/buildSrc/src/main/groovy/BumpVersionTask.groovy: 3: unable to resolve class TaskAction ,  unable to find class for annotation
 @ line 3, column 3.
     @TaskAction
     ^

2 errors

:buildSrc:compileGroovy FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileGroovy'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 6.0 secs
mustafar:core-android scottjohnson$