Gradle: Inject plugins to subprojects

Question

I came across gradle plugin to help me to deal with dotted property names. It works fine in single project when used like this:

apply plugin: 'config'

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.esyfur:gradle-config-plugin:0.4.+'
    }
}

task printProps() {
    println(config.grafana.url)
}

However, I want to use this plugin in multiple projects (multi-module) and would like idealy not to repeat such initialization in every project but rather inject it somehow to have it more manageable.

I have failed to find out how to do it or if it can be done. I tried e.g. in parent build.gradle use this:

allprojects {
    apply plugin: 'config'
}

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.esyfur:gradle-config-plugin:0.4.+'
    }
}

but it does not work. Gradle complains that it can not find property 'config' on task.

Update

After Peter's comment I started wondering around and creating an example project from the scratch and incrementally get it closer to my 'real project'. I was not completely precise in describing my setup. In settings.gradle I use

rootProject.children.each { project ->
    project.buildFileName = "${project.name}.gradle"
} 

which causes this problem. Everything works fine When switched back to build.gradle names.

Answer 1

The problem is that your settings.gradle doesn't configure rootProject.buildFileName to match the non-standard filename used for the build script. Therefore the build script doesn't get evaluated, and its buildscript block never takes effect.