build.gradle

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

buildscript {
    apply from: 'dependencies.gradle'
    repositories {
        google()
        gradlePluginPortal()
        mavenCentral()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:${versions.android_gradle}"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${versions.kotlin}"

        classpath "com.github.ben-manes:gradle-versions-plugin:${versions.versions}"
    }
}

apply plugin: "com.github.ben-manes.versions"

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

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

def isNonStable = { String version ->
    def stableKeyword = ['RELEASE', 'FINAL', 'GA'].any { it -> version.toUpperCase().contains(it) }
    def regex = /^[0-9,.v-]+(-r)?$/
    return !stableKeyword && !(version ==~ regex)
}

dependencyUpdates {
    rejectVersionIf {
        isNonStable(it.candidate.version) && !isNonStable(it.currentVersion)
    }
}