Modifying JAR manifest after configuration has been resolved

Help/Discuss
1

I’d like to set a custom property in the JAR manifest based on a custom configuration. Consider the following Gradle configuration for a :main-component:

apply plugin: 'java'

configurations {
    moduleImplementation {
        description = '...'
    }

    implementation.extendsFrom moduleImplementation
}

dependencies {
    moduleImplementation project( ':module-component1' )
    moduleImplementation project( ':module-component2' )
}

jar {
    manifest {
        attributes(
           'dependencies': configurations.moduleImplementation.findAll { it.name.startsWith( 'module-' ) }.collect { it.name - 'module-' }.join( ',' )
       )
    }
}

I want the manifest to contain an entry that looks like this:

dependencies: component1,component2

It doesn’t work though, because referencing configurations.moduleImplementation in the jar task during its configuration phase seems to resolve the configuration before the dependencies block has been parsed, causing this error:

* Where:
Build file 'build.gradle' line: 12

* What went wrong:
A problem occurred evaluating project ':main-component'.
> Cannot change dependencies of dependency configuration ':main-component:moduleImplementation' after it has been resolved.

Is there any way around this? I know that compileClasspath and similar configurations can be used when setting manifest attributes, but the problem is that I wan’t to know if a dependency came from the specific moduleImplementation configuration, and that information is not available in compileClasspath it seems.