How to add a @Classpath property

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1

Suppose I have something like this:

abstract class MyService : BuildService<MyService.Parameters> {
    interface Parameters {
        // ...
    }
    
    private val objectMapping = ConcurrentHashMap<String, MyConfiguration>()
    
    fun getConfiguration(name: String): MyConfiguration {
        return objectMapping.computeIfAbsent("name") {
            // populate using something from parameters
        }
    }
}

class MyConfiguration {
    val classpath: ConfigurableFileCollection
}

abstract class MyTask @Inject constructor(execOps: ExecOperations) : DefaultTask() {
    @get:Input
    abstract val configurationName: Property<String>
    
    @get:ServiceReference("...")
    abstract val service: Property<MyService>
    
    // convention is set to service.get().getConfigurationName(configurationName.get())
    @get:Internal
    abstract val configuration: Property<MyConfiguration>
    
    @TaskAction
    fun run() {
        execOps.javaexec {
           classpath = configuration.get().classpath
        }
    }
}

This somehow doesn’t feel right, owing to the fact that the classpath should be something that is cacheable - that is, a @Classpath property seems to be missing. Would it suffice to define such a property, with a convention on it that is set to configuration.map { it.classpath }? It seems weird to have a @InputFiles @Classpath property derived from an @Internal property.