Gradle change classifier during dependency resolution

Question

I have a dependency to a special version of a jar identified by a classifier (e.g. clover). I can easily specify it as a dependency. Unfortunately all its dependencies specified in the pom are without classifier.

compile(group: 'ch.mypackage', name: 'projectWithTransitiveDeps', version: "1.0.0-SNAPSHOT", classifier: 'clover')

I would like to change the transitive dependencies to use a classifier as well, but there's setter on the object:

configurations {
    compile.resolutionStrategy {
        eachDependency { DependencyResolveDetails details ->
            if (details.requested.group == 'ch.mypackage') {
                details.useTarget group: details.requested.group, name: details.requested.name, version: details.requested.version, classifier: 'clover'
            }
        }
    }
}

The above code will fail with an exception because classifier is an unknown property.

Is there another way to achieve this?

Answer 1

According to the comment in gradle/gradle#8561:

There is no interest in Gradle to leak the classifier concept to constraints, as constraints effectively apply to a module while the classifier is more of an artifact concept.

it is not possible.

But you can still exclude transitive dependencies and add your own, something like this:

ext.myPackageVersion = '1.0.0-SNAPSHOT'
ext.myPackageClassifier = 'clover'

dependencies {
  compile(group: 'ch.mypackage', name: 'projectWithTransitiveDeps', version: myPackageVersion, classifier: myPackageClassifier) {
    exclude group: "ch.mypackage", module:'transitiveDep'
  }
  compile(group: 'ch.mypackage', name: 'transitiveDep', version: myPackageVersion, classifier: myPackageClassifier)
}

See also Gradle changing dependencies by classifier. There was the same underlying problem