I’m trying to build an umbrella framework that bundles two subprojects. Here’s my project structure:...

# ios

[Andrea Prearo]

I’m trying to build an umbrella framework that bundles two subprojects. Here’s my project structure:

|- shared-libraries
 \- network
  |- network-core
  |  |- src
  |  |  \- commonMain
  |  \- build.gradle.kts
  |
  |- network-ktor
  |  |- src
  |  |   \- commonMain
  |  \- build.gradle.kts
  |
   \- build.gradle.kts

The network module build script has the following dependencies:
• api(project(":shared-libraries:network:network-core"))
• api(project(":shared-libraries:network:network-ktor"))
Basically, network is an umbrella module that contains no source code.

For Android, all works fine. I’m able to import :shared-libraries:network without issues.
For iOS, I’m leveraging FatFrameworkTask (registered as fatFramework) to build the umbrella framework. When I run ./gradlew :shared-libraries:network:fatFramework, Gradle compiles the code but it doesn’t create any iOS framework. I’m not sure why.
Is there a better/easier way to create an iOS umbrella framework for a project structure like the one above?

[russhwolf]

You might need to add a source file to network. Can be empty.

[Andrea Prearo]

Will try that. Thanks!

[russhwolf]

Alternatively, you might need to explicitly export the project dependencies in your framework block

[russhwolf]

https://kotlinlang.org/docs/reference/building-mpp-with-gradle.html#exporting-dependencies-to-binaries

[Andrea Prearo]

I have export(project(":shared-libraries:network:network-core")) and export(project(":shared-libraries:network:network-ktor")) in the network script file. Gradle compiles the source code but it look like the link step is never executed.

[Andrea Prearo]

Adding a source file to network is actually triggering linkDebugFrameworkIosSim. simple smile
Now, I need to solve the following error:

Following dependencies exported in the debugFramework binary are not specified as API-dependencies of a corresponding source set

[russhwolf]

oh yeah I guess you needed both those things 🙂

[russhwolf]

That error sounds like it's not seeing your framework exports as the same thing as the project dependencies. Not sure why that would be off-hand

[russhwolf]

Might be you need to use the groupartifactversion syntax instead of project

[Andrea Prearo]

I’ll try that and see what happens.

[Andrea Prearo]

Actually, during my tests, I ended up adding export(project(":shared-libraries:network:network-core")). Which was likely the reason of the above Gradle error (I guess due to a circular dependency).

[Andrea Prearo]

Adding an empty source file, as you initially suggested, appears to do the trick. Gradle is now generating granular_auth.framework.

[russhwolf]

nice!

[Andrea Prearo]

Thanks again @russhwolf!

[svyatoslav.scherbina]

Also please avoid using network as module name. There are known issues in stable releases, it might clash with Network platform library.

[Andrea Prearo]

Will do. Thanks!