"Cannot change dependencies of dependency configuration ':server:api' after it has been included in dependency resolution"

Help/Discuss
1

I’m trying to write a custom Gradle (8.0, 8.1) task which will print out all of my JAR dependencies in a subproject.

So I’m doing this:

val deps by tasks.creating {
    val files = configurations.runtimeClasspath.get()
}

This works OK; it puts the Configuration object inside files, but when I’m trying to get into the files like this:

val deps by tasks.creating {
    val files = configurations.runtimeClasspath.get().files
}

all I’m getting is this error:

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':server'.
> Failed to notify project evaluation listener.
> Cannot change dependencies of dependency configuration ':server:api' after it has been included in dependency resolution.
> Cannot change dependencies of dependency configuration ':server:api' after it has been included in dependency resolution.
> Cannot change dependencies of dependency configuration ':server:implementation' after it has been included in dependency resolution.

Does the .files accessor really change anything in the dependency graph? Shouldn’t it be readonly? Is this a bug?

Normally it works for simple Gradle projects, but for some reason fails for a simple multi-project build script. Can you post some pointers on how to debug such problems?

Edit: I think it has something to do with Micronaut. I’ve disabled the Micronaut Gradle plugin and it worked.

2

Duck debugging in action :wink:

I’ve placed the task logic inside doFirst block and it worked with Micronaut. So:

val deps by tasks.creating {
    doFirst {
        val files = configurations.runtimeClasspath.get().asPath
        println("$files")
    }
}

This works.