build.gradle

buildscript {
    ext.kotlin_version = '1.3.72'
    ext.coroutines_version = '1.3.7'
    ext.navigation_version = '2.3.0'
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.3'
        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$navigation_version"
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.1.0'
    }
}

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

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

Object propOrDef(String propertyName, Object defaultValue) {
    def properties = new Properties()
    def keyFile = rootProject.file("signing/key.properties")
    if (keyFile.exists()) {
        keyFile.withInputStream { stream -> properties.load(stream) }
    }
    def propertyValue = properties[propertyName]
    return propertyValue != null ? propertyValue : defaultValue
}