I try to migrate my MP multi-module project to 1.4-RC The root module has no code. On `./gradlew tas...

# multiplatform

[aleksey.tomin]

I try to migrate my MP multi-module project to 1.4-RC
The root module has no code.
On ./gradlew tasks see error
Please initialize at least one Kotlin target in 'my-project (:)'.
What I need to do? On 1.3.72 all OK.
--info and --debug doesn’t help me.
macOS, KMP contains OSX/minGW/android code
gradle 6.4, 6.5.1 or 6.6, jdk - 1.8 or 11 - result the same

PS: Solved - just add into root build.gradle.kts

kotlin {
    jvm()
}

Thanks for @msink

[gildor]

Looks that you apply kotlin mpp plugin in your root project, but didn’t configure any targets there

[msink]

I had same error - in my project samples directory does'nt contain any code, all code is in subdirectories.
So as workaround just added dummy

kotlin {
    jvm()
}

block in samples/build.gradle.kts .

[gildor]

but why this module even applies kotlin mpp plugin if it doesn’t have sources. If it just a root project which doesn’t build anything itself it usually shouldn’t apply any plugins

[aleksey.tomin]

@msink thank you, it works!

[aleksey.tomin]

https://youtrack.jetbrains.com/issue/KT-41086

[gildor]

Yep, as I thought, you are applying mpp plugin to root module, even tho you don't have any code there or config, do not apply it to avoid warning (which correctly warns you that it's misconfigured)

[msink]

Or apply it in root module like this:
kotlin("multiplatform") version "1.4.0-rc" apply false

[msink]

But my situation in kotlin-libui is a little different:
in root build.gradle.kts I have kotlin("multiplatform") version Kotlin.version apply false,

[msink]

in `settings.gradle.kts`:

include(":libui")
include(":samples:controlgallery")
include(":samples:datetime")
include(":samples:drawtext")
include(":samples:form")
include(":samples:hello")
include(":samples:hello-ktx")
include(":samples:histogram")
include(":samples:logo")
include(":samples:table")
include(":samples:timer")

(:samples itself even not included)

[msink]

And without that worksround - error Please initialize at least one Kotlin target in 'samples (:samples)'

[gildor]

@msink but you do apply multiplatform in samples, which is not used there, but used by subprojects.
I understand why you are doing this, to make Gradle generate accessors so you could apply configuration in subprojects

One way to do that is do not apply plugin to project itself, and instead use dynamic syntax to access extension

[gildor]

This what I mean:
https://github.com/msink/kotlin-libui/pull/36

[msink]

Thanks 😁

[nrobi]

I have the same issue when updating to AS 4.2.0-alpha15 , but I’m not applying the kotlin mpp plugin in the root build.gradle.kts

@gildor am I missing something? 🤔

[nrobi]

Untitled

[gildor]

maybe you have some other code in another module which applies it

[gildor]

nobody prevent other module call allprojects{} from any other module

[gildor]

you can try to add observer for plugins and crash if plugin is applied to root module

[gildor]

Also, you may have the same problem with any other module, not only root

[nrobi]

It seems that updating gradle from 6.7-rc-4 to 6.7 solves the issue