Hi, I'm trying to add a `common` module as a dependency to another `common` module but I'm not able ...

# multiplatform

[AdrianRaFo]

Hi, I'm trying to add a common module as a dependency to another common module but I'm not able to get it working. I tried with implementation, api and compileOnly but any of them give me a successful build. Could anyone helps me?

[Kris Wong]

so you just have 2 separate source sets in the same build.gradle?

[galex]

Multi-level common code is currently under heavy development https://youtrack.jetbrains.com/issue/KT-27801

[AdrianRaFo]

I have 2 modules on the same project each of them with its own build.gradle

[h0tk3y]

Then just adding an api or implementation dependency on another project to the commonMain source set should work: you will be able to use the declarations from the other project's commonMain, and also platform-specific declarations in the appropriate platform-specific sources of the depending project.

kotlin {
    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation(project(":foo"))
            }
        }
    }
}

If it doesn't work for you, could you please provide more details about the project structure?

[AdrianRaFo]

it doesn't, wait a sec I'll share the project

[h0tk3y]

Also, as Alex Gherschon noted above, we are working to improve the behavior of such dependencies with custom source set hierarchies, which are now not fully supported yet, but the simple case with just commonMain and platform-specific sources should work.

[AdrianRaFo]

This is the repo https://github.com/AdrianRaFo/common-dep-issue

[AdrianRaFo]

When I try to build the project the commonMain is not able to find the helloInit value declarated inside the separatedCommon module

[h0tk3y]

First, the kotlin-platform-common plugin is a part of Kotlin 1.2.x MPP tooling that is now becoming obsolete (no active development, and we have plans to deprecate it). Also, the current architecture of multiplatform projects requires that all expect declarations are provided with actual implementations within the same module, and no actual implementations can be added by a library consumer.

[h0tk3y]

So, in your example, separateCommon should use the kotlin-multiplatform plugin, too, and should therefore provide platform-specific implementations for all its expect declarations.

[h0tk3y]

See also: https://kotlinlang.slack.com/archives/C3PQML5NU/p1558023770499000

[AdrianRaFo]

Sorry I fixed the sample for a more clear sample of my issue

[AdrianRaFo]

When I just have a val only needed on the commonMain sourceSet

[AdrianRaFo]

oh, use the multiplatform plugin worked. Thank you so much