Gradle deprecation warning for Configuration.fileCollection(Spec)

[tiwoc]

What is the problem?

Building a project that includes SKIE logs the following warning:

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.10/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

When run with --warning-mode all --stacktrace, Gradle shows the following:

The Configuration.fileCollection(Spec) method has been deprecated. This is scheduled to be removed in Gradle 9.0. Use Configuration.getIncoming().artifactView(Action) with a componentFilter instead. Consult the upgrading guide for further information: https://docs.gradle.org/8.10/userguide/upgrading_version_8.html#deprecate_filtered_configuration_file_and_filecollection_methods
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.fileCollectionInternal(DefaultConfiguration.java:606)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.fileCollection(DefaultConfiguration.java:596)
        at co.touchlab.skie.plugin.switflink.SwiftUnpackingConfigurator$configureCustomSwiftUnpacking$$inlined$registerSkieTargetBasedTask$1.invoke(BaseSkieTask.kt:41)
        at co.touchlab.skie.plugin.switflink.SwiftUnpackingConfigurator$configureCustomSwiftUnpacking$$inlined$registerSkieTargetBasedTask$1.invoke(BaseSkieTask.kt:36)
        at co.touchlab.skie.plugin.util.BaseSkieTaskKt$sam$i$org_gradle_api_Action$0.execute(BaseSkieTask.kt)
        at org.gradle.api.internal.DefaultMutationGuard$1.execute(DefaultMutationGuard.java:45)
        at org.gradle.api.internal.DefaultMutationGuard$1.execute(DefaultMutationGuard.java:45)
        at org.gradle.internal.code.DefaultUserCodeApplicationContext$CurrentApplication$1.execute(DefaultUserCodeApplicationContext.java:124)
        at org.gradle.api.internal.DefaultCollectionCallbackActionDecorator$BuildOperationEmittingAction$1.run(DefaultCollectionCallbackActionDecorator.java:110)
[…]

I believe that this can be traced back to this line:

SKIE/SKIE/skie-gradle/plugin-impl/src/main/kotlin/co/touchlab/skie/plugin/switflink/SwiftUnpackingConfigurator.kt

Line 12 in ff246a3

val linkerKlibs = target.linkerConfiguration.fileCollection { true }.filter { it.isKlib }

When does the problem occur?

When running any Gradle task, for example ./gradlew tasks

How do we reproduce the issue?

I believe that this will occur no matter how the project is configured, as long as SKIE is included. If you have trouble reproducing, let me know and I'll make a minimal example.

What versions of SKIE, Kotlin, and Gradle do you use?

• SKIE 0.9.0-RC.3 (but it's also present with 0.8.4)
• Kotlin 2.0.10
• Gradle 8.10

What is your SKIE Gradle configuration?

skie {
    build {
        // Make generated framework work on other machines and other Xcode versions
        // See https://skie.touchlab.co/configuration/swift-compiler
        produceDistributableFramework()
    }
}