build.gradle

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

buildscript {
    ext.kotlin_version = '1.1.4-3'
    repositories {
        jcenter()
        mavenCentral()
        maven { url 'https://maven.fabric.io/public' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'

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

        // For latest version:
        // https://docs.fabric.io/android/changelog.html#fabric-gradle-plugin
        classpath 'io.fabric.tools:gradle:1.22.1'
        classpath 'me.tatarka:gradle-retrolambda:3.7.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
}

ext {
    libVersions = [
            appCompat : '26.0.1',
            constraintLayout : '1.0.2',
            converter_gson : '2.3.0',
            espresso : '3.0.1',
            junit : '4.12',
            mockitoAndroid : '2.7.22',
            okHttpLogInt : '3.2.0',
            retrofit : '2.3.0',
            rxAndroid : '2.0.1',
            rxJava : '2.1.2',
            rxJavaAdapter : '2.2.0',
            robolectric : '3.3.2',
            timber : '4.5.1'

    ]
}

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