Configuration.getElements() eagerly triggers artifact transforms

[jjohannes]

Current Behavior

Using Configuration.getElements() to define lazy mapping functions on to-be-produced artifacts should not trigger artifact transforms. Such transforms run too early for locally built artifacts and can produce a wrong result or an error.

Expected Behavior

Configuration.getElements() does not trigger artifact transforms.

Context (optional)

No response

Steps to Reproduce

Reproducer project

settings.gradle.kts

include("app", "lib")

lib/build.gradle.kts

plugins { id("java-library") }

app/build.gradle.kts

plugins { id("java-library") }

abstract class IdTransform : TransformAction<TransformParameters.None> {
    @get:InputArtifact
    abstract val inputArtifact : Provider<FileSystemLocation>
    override fun transform(outputs: TransformOutputs) { outputs.file(inputArtifact) }
}
val transformed = Attribute.of("transformed", Boolean::class.javaObjectType)
configurations.runtimeClasspath { attributes.attribute(transformed, true) }
dependencies.artifactTypes.maybeCreate("jar").attributes.attribute(transformed, false)
dependencies.registerTransform(IdTransform::class) {
    from.attributes.attribute(ArtifactTypeDefinition.ARTIFACT_TYPE_ATTRIBUTE, "jar").attribute(transformed, false)
    to.attributes.attribute(ArtifactTypeDefinition.ARTIFACT_TYPE_ATTRIBUTE, "jar").attribute(transformed, true)
}

dependencies { implementation(project(":lib")) }

tasks.register<Sync>("copyRT") {
    from(configurations.runtimeClasspath.get().elements)
    destinationDir = layout.buildDirectory.dir("out").get().asFile
}

Run: gradle clean :app:copyRT

Transform triggers for non existing lib/build/libs/lib.jar

Gradle version

8.5 (reproducible with other 8.x versions and 7.6)

Build scan URL (optional)

https://scans.gradle.com/s/ktwgohxcen6zq

Your Environment (optional)

No response

[ov7a]

Thank you for providing a valid report.

The issue is in the backlog of the relevant team, but this area of Gradle is currently not a focus one, so it might take a while before a fix is made.