How to access extra properties from project build.gradle in modules

Question

So I'm trying to setup Maven Publish in my library which has several modules in it.

I am following this tutorial since the whole process is imo not that well documented on the Android Documentation. However, I am stuck at the point Customizing POM File Generation — Basics. I added the external info in my project build.gradle and try to add the publishing information in the modules build.gradle. When I try to sync Gradle I get the following error:

A problem occurred configuring project ':projectname'.
> Failed to notify project evaluation listener.
   > Cannot get property 'pomGroupID' on extra properties extension as it does not exist
   > Cannot get property 'pomGroupID' on extra properties extension as it does not exist

The code in my build.gradle files looks like this:

Project:

buildscript {

    // POM information for publishing the library
    ext {
        pomVersion = '4.23'
        pomGroupID = "com.randomname.stackoverflowquestion"
    }
....

Module:

project.afterEvaluate {
    publishing {
        publications {
            maven(MavenPublication) {
                groupId project.ext.pomGroupID
                artifactId project.name
                version project.ext.pomVersion

                artifact(bundleReleaseAar)
            }
        }
    }
}

Any idea on what could be the problem in my case?

Answer 1

The problem was very simple. Only had to change

project.ext.pomVersion

to

project.pomVersion