Could not get unknown property 'release' for SoftwareComponentInternal - Maven publish plugin project gradle

Question

I have an Android project with multiple modules and I want to publish them to self-hosted maven repo. I earlier had the publishing code present in individual modules and things worked just fine. I am now trying to move the publishing code into the project build.gradle so that I can reuse the code. The code inside my individual modules was:

afterEvaluate {
        // To avoid publishing the applications inside the project...
        if (!plugins.hasPlugin("android")) {
            publishing {
                publications {
                    mavenAar(MavenPublication) {
                        artifactId "$project.name"
                        from components.release
                    }
                }
                repositories {
                    .... My repo details and credentials .......
                }
            }
        }
    }

and things worked just fine. When I moved the code to the project build.gradle, like this:

subprojects {
    apply plugin: 'maven-publish'

    afterEvaluate {
        // To avoid publishing of the applications inside the project ..
        if (!plugins.hasPlugin("android")) {
            publishing {
                publications {
                    mavenAar(MavenPublication) {
                        artifactId "$project.name"
                        from components.release
                    }
                }
                repositories {
                    .... My reop details and creddentials  .....
                }
            }
        }
    }
}

I started getting the following error when running the publish task:

A problem occurred configuring project ':mymodule'.
> Could not get unknown property 'release' for SoftwareComponentInternal set of type org.gradle.api.internal.component.DefaultSoftwareComponentContainer.

Can someone point out the problem here?

Answer 1

I came across this after updating AGP for Jitpack. Both the MavenPublication block and the components.release line appear to use your build variant name. So if you have a standard debug and release variant it would look like this:

afterEvaluate {
publishing {
    publications {
        release(MavenPublication) {
            from components.release
            groupId = 'com.my.group'
            artifactId = 'id'
            version = Config.libraryVersion
        }
    }
}

But if you have a build variant with a name other than release, you need to use that:

afterEvaluate {
    publishing {
        publications {
            productionRelease(MavenPublication) {
                from components.productionRelease
                groupId = 'com.my.group'
                artifactId = 'id'
                version = Config.libraryVersion
            }
        }
    }