Mainly the `Configuration` class does not have an `isDirecto kotlinlang #dsl

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Title

m

Marc Reichelt

01/28/2019, 12:44 PM

Mainly, the

Configuration

class does not have an

isDirectory

property - but how could the Groovy code then work in the first place?

d

Dominaezzz

01/28/2019, 1:45 PM

You might need to do some casting.

m

Marc Reichelt

01/28/2019, 1:47 PM

how should I cast

Configuration

to a

File

?

d

Dominaezzz

01/28/2019, 1:50 PM

I'm not sure what type it really is. You could print it out with

println()

to check and then cast to the expected type with

as

.

m

Marc Reichelt

01/28/2019, 1:55 PM

I took the hard road and I think I solved it, although it involves mutable state for now it seems to work:

from(configurations.compile.map { configuration ->
            var finalFileTree: FileCollection = files().asFileTree
            configuration.asFileTree.forEach {
                if (it.isDirectory.not()) {
                    finalFileTree = finalFileTree.plus(zipTree(it))
                }
            }
            finalFileTree
        })

And with this I also found a more functional way to do it - although I assume there has to be an easier way:

from(configurations.compile.map { configuration ->
            configuration.asFileTree
                .fold(files().asFileTree) { collection, file ->
                    if (file.isDirectory) collection else collection.plus(zipTree(file))
                }
        })

On GitHub @StefMa wrote that there is an official way to do it - and it’s even part of the official Gradle docs (see https://docs.gradle.org/current/userguide/working_with_files.html#sec:creating_uber_jar_example):

dependsOn(configurations.runtimeClasspath)
        from({
            configurations.runtimeClasspath.get().filter { it.name.endsWith("jar") }.map { zipTree(it) }
        })

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