Gradle Build Script Sync with Git Android

build.groovy

def gitSha = 'git rev-parse --short HEAD'.execute([], project.rootDir).text.trim()
def commitCount = Integer.parseInt('git rev-list master --count'.execute([], project.rootDir).text.trim())
def gitCurrentTag = 'git describe --tags --abbrev=0'.execute([], project.rootDir).text.trim()

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "com.some.app"
        minSdkVersion 16
        targetSdkVersion 22
        versionCode commitCount
        versionName gitCurrentTag

        buildConfigField "String", "GIT_SHA", "\"${gitSha}\""

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        
    }
}