Sharing variables between library and application

Question

What would be the best way to share some values like version code or name between android app and library? I need to be able to use it in the gradle file and kotlin files (like when using BuildConfig file). I was trying with buildSrc and sharing files like described here: Share code between Gradle buildSrc and project but I wasn't able to add anything to compileClasspath because as I can see this value is in Gradle SourceSet https://docs.gradle.org/current/dsl/org.gradle.api.tasks.SourceSet.html#org.gradle.api.tasks.SourceSet:compileClasspath and it's not available in AndroidSourceSet which is used in sourceSets.

Answer 1

One simple way of sharing values between a Gradle build file and the target program is to use the Gradle BuildConfig plugin

Here you can write the following in your build.gradle.kts:

plugins {
    id("com.github.gmazzo.buildconfig") version "5.3.5"
}

buildConfig {
    buildConfigField("APP_NAME", project.name)
    buildConfigField("APP_VERSION", provider { "\"${project.version}\"" })
}

And it will generate an object of constants in your project for you to access:

internal object BuildConfig {
    internal const val APP_NAME: String = "kts"
    internal const val APP_VERSION: String = "\"0.1.0-demo\""
}