Kotlin Multiplatform Support (2500USD Bounty)

[lihaoyi]

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From the maintainer Li Haoyi: I'm putting a 2000USD bounty on this issue, payable by bank transfer on a merged PR implementing this.

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The goal of this bounty is to flesh out the missing parts of Kotlin-Multi-Platform support. Previous Kotlin support in Mill is mostly for the JVM (#3451) with some support for web and very basic Kotlin-JS use cases (#3611). The goal here is to flesh out the Kotlin-JS functionality, add support for Kotlin-Native, and improve the overall multi-platform support e.g. publishing and consuming KMP modules and writing KMP applications

• Example for Kotlin/JS support of browser executables and test runner with selectors (500USD)

  • Currently we only support node executables

• Example for Kotlin/Native support (1000USD)

  • This should be the equivalent of example/kotlinlib/basic/1-simple as well as example/scalalib/native/2-interop but written using Kotlin-Native.

• Publishing Kotlin-Multi-Platform modules

  • Proper support for .module files such that they can be resolved by Gradle's kotlin-multi-platform integration (500USD)

• Example of a hello-world Kotlin-Multi-Platform app that uses Jetpack-Compose-Multi-Platform to support Desktop/Android/Web (500USD)

  • This can be a relatively trivial Hello-World application, but it should work on all three platforms using the same Kotlin code

These milestones are open for discussion, and can be modified or additional milestones added if necessary

[c0d33ngr]

Hello @lihaoyi do you want item 2 to use just KotlinModule and the kotlin/native cli compiler or it's something much more than that

[lihaoyi]

@c0d33ngr i expect we would need a KotlinNativeModule, since kotlin native would have its own flags and configuration. This would be similar to ScalaNativeModule

[c0d33ngr]

I suspected so. Thank for the reply

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On Mon, Nov 4, 2024, 3:34 PM Li Haoyi ***@***.***> wrote: @c0d33ngr <https://github.com/c0d33ngr> i expect we would need a KotlinNativeModule, since kotlin native would have its own flags and configuration. This would be similar to ScalaNativeModule — Reply to this email directly, view it on GitHub <#3867 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AZKEA4TDOGGPNTF3C2BSV3LZ66AXXAVCNFSM6AAAAABQZ7PSVKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDINJUHA3TOMBWGU> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[c0d33ngr]

@0xnm the example about kotlin/native support that @lihaoyi included. What kind of implementation do you expect for the KotlinNative module?
With the android and python modules which both use cli tool under the hood.
Is that what you expect for a KotlinNative module? Using the kotlin native compiler under the hood.
I want to confirm cause the kotlin-native doc says it won't scale well for very larger project with lots of files and libraries

[0xnm]

Any target supported by Kotlin/Native, they are listed here. Obviously, some targets may require additional setup/compiler flags and moreover require a certain platform to be compiled on (e.g. Apple targets can be compiled only on Apple boxes), so if you want to try tackle it I would suggest starting with Linux or Windows target.

The exact use of Kotlin/Native depends on the way compiler is distributed, you may want to check first how Kotlin and Kotlin/JS code is implemented in mill.

[lihaoyi]

Closing this thanks to @alexarchambault 's work on Coursier support for Kotlin Multiplatform