Does anyone have a good idea how to model a task input property that can either be a file or directory? In pre-

Property

times I had an

@Internal

property that was set to either, and then a derived

@Optional @InputFile

read-only property and a derived

@Optional @InputDirectory

read-only property which checked whether the internal property is a file or directory and at execution time checked that exactly one of them is set. I'm thinking about cleaner ways to rewrite this, without splitting the task into multiple tasks.

I haven't tried but does this possibly work?

@get:Nested var input: Either

interface Either {
    abstract class File : Either {
        @get:InputFile abstract val file: RegularFileProperty
    }
    abstract class Directory : Either {
        @get:InputDirectory abstract val dir: DirectoryProperty
    }
}

Probably not the answer you're looking for but your `@InputDirectory` should probably be `@InputFiles` in the first place

for the record, you can

when (val either = input.get()) {
    is Either.File -> "Input file: ${either.file.get().asFile.absolutePath}"
    is Either.Directory -> "Input directory: ${either.dir.get().asFile.absolutePath}"
}

instead of casting a second

get