So, I stumble upon an usage problem of

ConfigurableFileCollection

used in

SourceTask

s: Whenever a plugin uses one of those and multiple source directories are added to it (say

build/generated/foo/kotlin

and

build/generated/bar/kotlin

), I cannot exclude files from this said file collection via

exclude("**/build/**")

or

exclude("**/generated/**")

, but only match path parts beyond the configured source directories, e.g.

**/SomeFile.kt

. I could not see an API in

PatternFilterable

that makes this possible and my naive attempt to use

FileTreeElement

via

exclude { spec ->
    spec.file.absolutePath.contains("**/build/**")
}

failed as well. So what do I overlook here?

That you path is

bla/build/generated/blu

and not

**/build/**/generated/blu

.

Ah, damn me, right 🙂