In this example <https://github.com/Kotlin/dokka/b...

# dokka

[alexhelder]

In this example
https://github.com/Kotlin/dokka/blob/master/examples/gradle-v2/basic-gradle-example/build.gradle.kts

And the docs
https://kotlinlang.org/docs/dokka-gradle.html#single-project-configuration

There is “.main” as below:

dokka {
  dokkaSourceSets.main {
  }
}

But this errors in AS Quail (2026.1.1). I am using dokka 2.2.0 and kotlin 2.3.21

[Chrimaeon]

which gradle version do you use?

[Chrimaeon]

also check that the from is a method of ConfigurableFileCollection . in the screenshot the code highlight looks like an extension function.

[Chrimaeon]

https://github.com/Kotlin/dokka/blob/f3f894263fae545df5991d6b31316267d7d61dc3/dokka-runners/dokka-gradle-plugin/src/main/kotlin/engine/parameters/DokkaSourceSetSpec.kt#L136

[alexhelder]

Thanks, I am using Gradle 9.5.0. If I don’t use .main like below, it at least compiles:

dokka {
    dokkaSourceSets.configureEach {
        includes.from("Readme.md")
    }
}

I don’t see a .main extension

[Chrimaeon]

Then use .named(“main“).

Also I guess you cleared Gradle change and did all the other shenanigans, right?

And is the original version only an IDE issue or actually a Gradle error?

[Adam Semenenko]

What source sets are available? You can print all names:

dokka {
  dokkaSourceSets.all {
    println("dokkaSourceSet: $name")
  }
}

[alexhelder]

@Adam Semenenko I got this on the console

dokkaSourceSet: debug
dokkaSourceSet: release
dokkaSourceSet: debugAndroidTest
dokkaSourceSet: debugUnitTest

I have a simple multi-module app, and I’m only using dokka in a library module

:app
:filedownload <-- this one has:

alias(libs.plugins.dokka)
dokka { ... } block you posted above

[Adam Semenenko]

Thanks for the info. Unfortunately, the UX isn't great here.

The names of the DokkaSourceSets are a 1-on-1 match with the Kotlin source sets. There's no 'main' source set in AGP projects, so dokkaSourceSets.main {} won't work.

dokkaSourceSets.release {} should work... however, AGP registers the Kotlin source sets lazily, which means it doesn't work https://github.com/Kotlin/dokka/issues/4499

Given that you only have a single 'documentable' source set (release), for your project I'd just do:

dokka {
  dokkaSourceSets.configureEach {
    // ...
  }
}

This will lazily configure all DokkaSourceSets. Which could be problematic if you have multiple documentable source sets.

[alexhelder]

I thought src/main/kotlin would be the main sourceset, but I must be confused

[Adam Semenenko]

yeah, it's confusing. In KGP the name of the source dir is related to the name of the SourceSet. But in the AGP world the source dir, src/main/kotlin, belongs to SourceSets with other names.