build.gradle

import groovy.json.JsonSlurper

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

buildscript {
    ext.kotlin_version = '1.3.10'
    repositories {
		maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.jakewharton:butterknife-gradle-plugin:9.0.0-rc2'
    }
}

allprojects {
    repositories {
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        maven {
            url "https://jitpack.io"
        }
        google()
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
    }
}

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

ext {
    versions = new JsonSlurper().parse(file('./project-versions.json'))
}