build.gradle

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

buildscript {
    ext.kotlin_version = '1.2.51'
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.4'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

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

ext.arch_components = "1.1.1"
ext.support_version = "27.1.1"
ext.play_services_vision = "15.0.2"
ext.constraint_layout_version = "1.1.2"
ext.junit_version = "4.12"
ext.support_test_version = "1.0.2"
ext.espresso_core_version = "3.0.2"

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}