build.gradle

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

buildscript {

    ext {
        kotlin_version = '1.1.60'
        timberVersion = "4.6.0"
        rxJavaVersion = "2.1.6"
        rxAndroidVersion = "2.0.1"
        butterKnifeVersion = "8.8.1"
        supportLibraryVersion = "26.1.0"

        libs = [
                appCompat       : ('com.android.support:appcompat-v7:' + supportLibraryVersion),
                recyclerView    : ('com.android.support:recyclerview-v7:' + supportLibraryVersion),
                rxJava          : ('io.reactivex.rxjava2:rxjava:' + rxJavaVersion),
                rxAndroid       : ('io.reactivex.rxjava2:rxandroid:' + rxAndroidVersion),
                timber          : ('com.jakewharton.timber:timber:' + timberVersion)
        ]
    }

    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

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

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