Does anyone have an issue finding the iosMain sour...

# multiplatform

[Marc Reichelt]

Does anyone have an issue finding the iosMain source set? I added the following code to my `build.gradle.kts`:

sourceSets["iosMain"].dependencies {
        implementation("io.ktor:ktor-client-ios:$ktorVersion")
    }

But Gradle complains with “KotlinSourceSet with name ‘iosMain’ not found.“…

[Artyom Degtyarev [JB]]

Please make sure that you have a target with name “ios”. Default source sets name depends on the target name, as described here(https://kotlinlang.org/docs/reference/building-mpp-with-gradle.html#default-project-layout)

[Marc Reichelt]

Ohhhh

[Marc Reichelt]

By introducing my code to generate a fat framework I changed the architecture name to iosArm64, and therefore the target name! Does this mean I’ll now have to add the dependencies to both the iosArm64 as well as the iosX64 targets?

[Sam]

You could filter the list of sourceSets by ones starting with "ios" and then calling .dependencies on each one.

[Marc Reichelt]

Nice, it works now! Thank you so much @Artyom Degtyarev [JB] 🎉

build.gradle.kts

[Marc Reichelt]

@Sam yep, that does make sense as well. And the Kotlin DSL makes this damn nice to read!

[Marc Reichelt]

Untitled

[Marc Reichelt]

Now I just need to figure out how to define that those 2 targets actually have the same source set iosMain, otherwise I would have to have 2 source directories iosX64Main and iosArm64Main with the same content…

[Artyom Degtyarev [JB]]

Maybe these threads can help, please take a look https://kotlinlang.slack.com/archives/C3PQML5NU/p1568572379013500
https://kotlinlang.slack.com/archives/C3SGXARS6/p1568297037167500

[Marc Reichelt]

Thanks, that looks useful. I will dig my head around this, but this is definitely something where we will loose many new developers jumping on KMP - because it’s just pretty complex, and usually people would like to concentrate on the business stuff, and not on figuring out how to resolve all those Gradle configuration stuff…

[Marc Reichelt]

Oh, wow, there are so many things that are new in the native/multiplatform world. Like the fact that there is no runBlocking for coroutines on iOS, so now I have to figure out how to do this myself.
If the method is called on a non-UI-thread, how can I simply make ktor client make a HTTP request on the thread it’s currently called?

[Sam]

Ktor calls have to be done on the main thread currently. It has some object types that are initialized there on startup. If a call is made on a background thread it will access those objects and cause an illegal state exception.

[Marc Reichelt]

awww, damn

[Marc Reichelt]

that’s pretty much a dealbreaker 😕

[Sam]

The call doesn't block and on iOS it is using NSURLSession which actually makes the call on a background thread. You would want to avoid doing any heavy workloads with the result on the main thread. For that you could use workers.

[russhwolf]

There is runBlocking for iOS, It’s just missing from JS so it’s not in the common stdlib. But you can define your own expect/actual alias if you just care about JVM and Native.

[Marc Reichelt]

Wow, that’s pretty cool - defining an expect runBlocking method with the same syntax as the real ones works!