Hey folks, wondering if there is any way to eliminate the need for duplicated code in both iosX64Mai...

# multiplatform

[Bailey Pollard]

Hey folks, wondering if there is any way to eliminate the need for duplicated code in both iosX64Main/iosArm64Main directories? Tried to find some documentation on this with no luck

[mbonnin]

I think this is the goal of HMPP: https://kotlinlang.org/docs/mpp-share-on-platforms.html#configure-the-hierarchical-structure-manually

[Bailey Pollard]

I read that, seems a bit questionable needing to duplicate the same code, just having it build for different archs

[mbonnin]

What we're doing is that we're creating a apple sourceSet and sourcing it from the different targets: https://github.com/apollographql/apollo-android/blob/dev-3.x/build-logic/src/main/kotlin/Mpp.kt#L24

[Arkadii Ivanov]

The ios shortcut defines the iosMain source set, so you can place your iOS code there. It should compile even without HMPP, which just adds IDE support (imports are resolved and not red).

[Bailey Pollard]

I should've mentioned this in the original post, I added an external ios framework to my project without the use of cocoapods. I can only import this framework in the iosX64Main/iosArm64Main directories. The import does not compile correctly in the iosMain directory. Is this expected behaviour for external frameworks?

[Big Chungus]

What I usually do is add custom sourceRoot to both sourceSets

[Big Chungus]

That way it's part (not just a dependency) of both sourceSets

[Bailey Pollard]

Any open source examples of this?

[Big Chungus]

kotlin.sourceSets["iosX64Main"].kotlin.srcDir("src/sharedIosMain/kotlin")

Do this in gradle for both and place your code there. Or even better yet, just add one's kotlin root to the other's

[Bailey Pollard]

Let me try that

[Big Chungus]

Beware that this is a hack, not standard practice

[Bailey Pollard]

How does one use code in iosMain that was declared in iosX64Main ?

[rnett]

You can't, (well, if you put an expect in iosMain and the actual in each sub-source set you kind of can). The setup with HMPP is you have some "more common" source set like iosMain that each of the iosX64Main, iosArm64Main, etc depend on. It's essentially the same as a common source set, just only shared between a few modules