gradle

android {
    compileSdkVersion 25
    buildToolsVersion '25.0.0'
    defaultConfig {
        applicationId "com.yourapp"
        minSdkVersion 19
        targetSdkVersion 25
        versionCode 1
        versionName project.APP_VERSION
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        buildConfigField "String", "GIT_BRANCH", "\"" + gitBranch() + "\""
        buildConfigField "String", "GIT_SHA", "\"" + gitSHA() + "\""
        def onCi = System.getenv("CI")
        if (onCi.equals("true")) {
            buildConfigField "String", "BUILT_ON", "\"CI\""
            versionCode System.getenv("CIRCLE_BUILD_NUM") as Integer
        } else {
            buildConfigField "String", "BUILT_ON", "\"local\""
            versionCode 1
        }
    }
    signingConfigs {
        release {
            storeFile file('release.keystore')
            storePassword System.getenv("RELEASE_KEYSTORE_PASSWORD")
            keyAlias 'yourapp-prod'
            keyPassword System.getenv("RELEASE_KEYSTORE_PASSWORD")
        }
        debug {
            storeFile file('debug.keystore')
            storePassword System.getenv("DEBUG_KEYSTORE_PASSWORD")
            keyAlias 'yourapp-debug'
            keyPassword System.getenv("DEBUG_KEYSTORE_PASSWORD")
        }
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
        }
        debug {
            signingConfig signingConfigs.debug
        }
    }
}