[GRPC] kotlin-multiplatform protoc plugin generates broken code

[AlexanderEggers]

Describe the bug
The generated code by the kotlin-multiplatform protoc plugins contains a lot of broken code when browsing the build folder.

For example that is the .ext.kt file for one of my protos:

/**
* Constructs a new message.
* ```
* val message = Id {
*    id = ...
* }
* ```
*/
operator fun Id.Companion.invoke(body: Id.Builder.() -> Unit): Id {
    val msg = IdInternal().apply(body)
    msg.checkRequiredFields()
    return msg
}

/**
* Copies the original message, including unknown fields.
* ```
* val copy = original.copy {
*    id = ...
* }
* ```
*/
fun Id.copy(body: Id.Builder.() -> Unit = {}): Id {
    return this.asInternal().copyInternal(body)
}

Neither the .Companion or .Builder exist anywhere. Is that intended?

[Mr3zee]

@AlexanderEggers They are compiler generated, you need KEFS IDE plugin. Please refer to https://kotlin.github.io/kotlinx-rpc/grpc-configuration.html, first paragraph

[AlexanderEggers]

In that case how could I run this via CI in the future? I have KEFS installed in my IDE, so I'm certain what part I'm doing incorrectly in my case.

Edit: I just checked my IDE and I can see that there are some warnings:

No compiler plugin artifact exists matching the requested version and criteria:
  - Version: 0.11.0-grpc-185, prefixed with 2.3.255-dev-255-
  - Criteria: EXACT
  - All artifacts in the bundle must have the same version.
Available versions for Kotlin 2.3.255-dev-255:
  - org.jetbrains.kotlinx:kotlinx-rpc-compiler-plugin-cli: []
  - org.jetbrains.kotlinx:kotlinx-rpc-compiler-plugin-k2: []
  - org.jetbrains.kotlinx:kotlinx-rpc-compiler-plugin-backend: []
  - org.jetbrains.kotlinx:kotlinx-rpc-compiler-plugin-common: []
Searched in Remote repository (kotlinx-rpc for IDE): https://redirector.kotlinlang.org/maven/kxrpc-for-ide

But this still doesn't answer my question how I would run this in CI even if I resolve this issue with the plugin.

[Jozott00]

The compiler plugin is applied by the Gradle plugin, so compilation works as expected (therefore also on your CI).

You need the KEFS plugin because, by default, the IDE doesn’t load Kotlin compiler plugins. This is because the IDE requires the compiler plugin with the exact Kotlin compiler version used by the IDE. KEFS solves this problem by finding the matching compiler plugin artifact and loading it in the IDE. This allows you to see what the compiler plugin produces.

So, the plugin is solely required to enhance the developer experience, not to provide any additional functionality.

[Jozott00]

Regarding your IDE, which IDE version are you using?

[Mr3zee]

This is an unexpected version 2.3.255-dev-255

[AlexanderEggers]

Regarding your IDE, which IDE version are you using?

I'm using Android Studio Panda 2.

[Mr3zee]

Oh, that explains KEFS not working. I'll update versions published to include Android studio, I didn't know they had separate ones

[Mr3zee]

Well shit https://issuetracker.google.com/issues/474940910?pli=1

[Mr3zee]

@AlexanderEggers I fixed the IDE issue in KEFS 0.3.4, should now work in AS. Kmp lib issue we discussed in Slack is still pending

[AlexanderEggers]

@Mr3zee KEFS works for me now when using AS Panda 2, thanks for looking into that.