kotlinlang #multiplatform

mport org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
plugins {
    kotlin("multiplatform")
    kotlin("plugin.serialization") version "1.5.0"
    id("com.android.library")
    id("com.squareup.sqldelight")
}
repositories {
    google()
    mavenCentral()
}

kotlin {
    android()

    val iosTarget: (String, KotlinNativeTarget.() -> Unit) -> KotlinNativeTarget =
        if (System.getenv("SDK_NAME")?.startsWith("iphoneos") == true)
            ::iosArm64
        else
            ::iosX64

    iosTarget("ios") {
        binaries {
            framework {
                baseName = "shared"
            }
        }
    }

    sourceSets {

        val ktorVersion = "1.5.4"

        val commonMain by getting {
            dependencies {
//                implementation("com.facebook.android:facebook-android-sdk:[5,6)")
//                implementation("com.google.android.material:material:1.3.0")
//                implementation("com.google.firebase:firebase-messaging:10.2.1")
//                implementation("com.google.android.gms:play-services:10.2.1")
//                implementation("com.google.android.gms:play-services-ads:10.2.1")
//                implementation("com.google.firebase:firebase-core:10.2.1")
//                implementation("com.google.firebase:firebase-auth:10.2.1")
//                implementation("com.github.siyamed:android-shape-imageview:0.9.+@aar")
//                implementation("com.github.barteksc:android-pdf-viewer:3.1.0-beta.1")
//                implementation("org.apache.commons:commons-io:1.3.2")

                  // Logger
                  implementation("com.github.aakira:napier:1.4.1")

                  implementation("io.ktor:ktor-client-core:$ktorVersion")
                  implementation("io.ktor:ktor-client-serialization:$ktorVersion")
                  implementation("io.ktor:ktor-client-logging:$ktorVersion")

                  implementation("com.squareup.sqldelight:runtime:1.5.0")

//                implementation("com.google.android.material:material:1.3.0")
//                implementation("androidx.appcompat:appcompat:1.2.0")
//                implementation("androidx.legacy:legacy-support-v13:1.0.0")
//                implementation("androidx.core:core:1.0.0")
//                implementation("androidx.legacy:legacy-support-v4:1.0.0")
//                implementation("androidx.constraintlayout:constraintlayout:1.1.3")
//                implementation("com.android.support.constraint:constraint-layout:")
//                implementation("com.google.firebase:firebase-messaging:10.2.1")
//                implementation("com.google.android.gms:play-services:10.2.1")
//                implementation("com.google.android.gms:play-services-ads:10.2.1")
//                implementation("com.google.firebase:firebase-core:10.2.1")
//                implementation("com.google.firebase:firebase-auth:10.2.1")
//                implementation("com.github.siyamed:android-shape-imageview:0.9.+@aar")
//                implementation("com.facebook.android:facebook-android-sdk:[5,6)")
//                implementation("androidx.mediarouter:mediarouter:1.0.0")
//                implementation("androidx.vectordrawable:vectordrawable:1.0.0")
//                implementation("com.github.barteksc:android-pdf-viewer:3.1.0-beta.1")
//                implementation("org.apache.commons:commons-io:1.3.2")
//                implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.30")
            }
        }

        val commonTest by getting {
            dependencies {
                implementation(kotlin("test-common"))
                implementation(kotlin("test-annotations-common"))
            }
        }
        val androidMain by getting {
            dependencies {

                implementation("com.squareup.sqldelight:android-driver:1.5.0")

                implementation("io.ktor:ktor-client-okhttp:$ktorVersion")

                implementation("androidx.multidex:multidex:2.0.0")
                implementation(fileTree(mapOf("dir" to "libs", "include" to listOf("*.jar"))))
                implementation(files("libs/ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar"))
                implementation(files("libs/pinchzoom.jar"))
                implementation(files("libs/org.apache.commons.net_2.0.0.v200905272248.jar"))
                implementation(files("libs/StartAppInApp-3.4.2.jar"))
                implementation(files("libs/picasso-2.5.2.jar"))
                implementation("com.google.android.material:material:1.3.0")
                implementation("androidx.appcompat:appcompat:1.2.0")
                implementation("androidx.appcompat:appcompat:1.0.0")
                implementation("androidx.legacy:legacy-support-v13:1.0.0")
                implementation("androidx.core:core:1.0.0")
                implementation("androidx.legacy:legacy-support-v4:1.0.0")
                implementation("androidx.constraintlayout:constraintlayout:1.1.3")
                implementation("com.android.support.constraint:constraint-layout:")
                implementation("com.google.firebase:firebase-messaging:10.2.1")
                implementation("com.google.android.gms:play-services:10.2.1")
                implementation("com.google.android.gms:play-services-ads:10.2.1")
                implementation("com.google.firebase:firebase-core:10.2.1")
                implementation("com.google.firebase:firebase-auth:10.2.1")
                implementation("com.github.siyamed:android-shape-imageview:0.9.+@aar")
                implementation("com.facebook.android:facebook-android-sdk:[5,6)")
                implementation("androidx.mediarouter:mediarouter:1.0.0")
                implementation("androidx.vectordrawable:vectordrawable:1.0.0")
                implementation("com.github.barteksc:android-pdf-viewer:3.1.0-beta.1")
                implementation("org.apache.commons:commons-io:1.3.2")
                implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.30")

            }
        }
        val androidTest by getting {
            dependencies {

                implementation(kotlin("test-junit"))
                implementation("junit:junit:4.13.2")
            }
        }
        val iosMain by getting {
            dependencies {
                implementation("io.ktor:ktor-client-ios:$ktorVersion")
                implementation("com.squareup.sqldelight:native-driver:1.5.0")
            }
        }
        val iosTest by getting

    }
}

apply { plugin("com.google.gms.google-services") }

android {
    compileSdkVersion(30)
    sourceSets["main"].manifest.srcFile("src//androidMain//AndroidManifest.xml")

    defaultConfig {
        minSdkVersion(17)
        targetSdkVersion(30)
    }

}

val packForXcode by tasks.creating(Sync::class) {
    val mode = System.getenv("CONFIGURATION") ?: "DEBUG"
    val framework = kotlin.targets.getByName<KotlinNativeTarget>("ios").binaries.getFramework(mode)
    val targetDir = File(buildDir, "xcode-frameworks")

    group = "build"
    dependsOn(framework.linkTask)
    inputs.property("mode", mode)

    from({ framework.outputDirectory })
    into(targetDir)
}

tasks.getByName("build").dependsOn(packForXcode)

//dependencies {
//    implementation(files("/Users/mbp/AndroidStudioProjects/PashtoLibrary/androidApp/libs/ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar"))
//    implementation(files("/Users/mbp/AndroidStudioProjects/PashtoLibrary/androidApp/libs/org.apache.commons.net_2.0.0.v200905272248.jar"))
//    implementation(files("/Users/mbp/AndroidStudioProjects/PashtoLibrary/androidApp/libs/picasso-2.5.2.jar"))
//    implementation(files("/Users/mbp/AndroidStudioProjects/PashtoLibrary/androidApp/libs/pinchzoom.jar"))
//    implementation(files("/Users/mbp/AndroidStudioProjects/PashtoLibrary/androidApp/libs/StartAppInApp-3.4.2.jar"))
//}


sqldelight {
    database("LibraryApp"){
        packageName = "com.example.app.core.database"
        sourceFolders = listOf("db")
        dialect="sqlite:3.24"
    }
}

:thread-please: 1

Kurt Renzo Acosta

10/04/2021, 1:35 PM

Did anyone experience this when building iOS using Kotlin 1.5.30?

Architecture i386 is not supported for platform iphonesimulator14.5

Joffrey

10/04/2021, 4:52 PM

Hey guys, is there any way to get the current Kotlin target from common code? I am writing a common test but the feature under test is not supported in Kotlin/Native, so I would like to just ignore the test on native. I could extract the test code into a common function and declare a test in every platform but the one to exclude, but that sounds inefficient

🤔 1

Tarika Chawla

10/05/2021, 4:31 PM

Hi all, does anyone have any experience with moving the kmm module outside of the app directory. In my case, my app is in

main -> fixture -> android/ios

. and the module is in

mmain -> kmm -> kmmtestmodule

The pod istall and import works fine, but xcode build fails and I cant call any functions from the kotlin pod. Xcode Build Error:

build.gradle.kts' line: 3

* What went wrong:
Plugin [id: 'org.jetbrains.kotlin.multiplatform'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Plugin Repositories (plugin dependency must include a version number for this source)

Konstantin Tskhovrebov

10/05/2021, 5:34 PM

KMP wizard with live preview in your browser :) https://terrakok.github.io/kmp-web-wizard/

:nice: 17

🎉 4

❤️ 9

:kotlinnew: 5

🔥 3

👏 5

CRamsan

10/05/2021, 5:37 PM

Has anyone encountered a bug in IntelliJ/AndroidStudio that breaks code highlighting/completion for Java projects that depend on KMM libraries that have both Android and JVM targets? My project compiles fine but the IDE seems to incorrectly use the Android target instead of the JVM target when doing autocompletion.

willyrs

10/06/2021, 6:39 AM

can I have multiple "common" folders? e.g. (commonOneMain, commonTwoMain) I have two different js targets and I don't want to put in both all the commonMain code

anuj

10/06/2021, 12:59 PM

I declared Int in shared kmm model I am successfully able to use that in Android but in iOS we have kotlinInt how to convert it in string in iOS I am new in iOS

kavi

10/07/2021, 2:01 PM

I think i’ve decided the worst thing about multiplatform is having to deal with xcode (the rest is great)! 😅 Here’s what i’m trying to achieve: 1. Multiplatform shared code that is exported as an xcframework using

assembleXCFramework

– called

AnymoCore.xcframework

2. This is then added as a framework to an iOS project (an SDK that I’m creating) which itself produces a framework – called

Anymo.framework

3. The final sdk framework is then consumed by apps – currently just a sample/test app So far my sample app seems to be running fine on the simulator but crashes when trying to run on a device…

dyld: Library not loaded: @rpath/AnymoCore.framework/AnymoCore
  Referenced from: /private/var/containers/Bundle/Application/A863B34D-6A54-4D8E-A3A1-69BB07344DE5/iosApp.app/iosApp
  Reason: image not found

If i add my xcframework to my test app directly and try to import some code from

AnymoCore

(rather than

Anymo

) then it works so i think i’m just going wrong at step 2 maybe? I suspect it’s some xcode config or flag that i need to set correctly but am running out of ideas and would appreciate any tips 🙏🏾

Brian G

10/07/2021, 3:16 PM

Looking forward to AppCode being able to build kotlin MPP apps without me having to touch Xcode ever again 🤞

💯 5

Joffrey

10/07/2021, 6:05 PM

Is there any way to define

@BeforeClass

@AfterClass

in multiplatform common tests? AFAICT these annotations are JVM-only at the moment 😞 I could add cleanup after each test, but that's a bit overkill, and may not work for every use case.

Waqas Tahir

10/07/2021, 7:03 PM

Tensorflow / Tensorflow lite for kotlin multiplatform projects ?

MarkRS

10/08/2021, 9:20 AM

Perhaps a very "getting-started" question, but it is multiplatform. AS is showing some code in red but still builds and runs the app. I'm guessing that this means I've got something skewiff with dependencies in my build.kts file, but I don't know what. In commonMain ktor in "import io.ktor.client.features.*" is red, and so are ClientRequestException and response in "e.response" (although Exception in "e: Exception" is fine). It may be these lines of code haven't run, but that shouldn't be relevant here, surely?

MJegorovas

10/08/2021, 10:23 AM

Anybody had a problem when Kotlin couldn't cast Swift

Int64

KotlinLong?

, example in thread.

Joffrey

10/08/2021, 2:34 PM

I'm getting the following warning in a multiplatform library with iOS support:

A compileOnly dependency is used in the Kotlin/Native target 'iosArm64'

The

commonMain

source set indeed declares

kotlinx-serialization-json

as a

compileOnly

dependency. This is what I want for non-native targets (JVM, JS browser, JS node...) because it's supposed to be used this way (I don't want to force this JSON-specific dependency onto users that want to use other serialization formats). So I have a couple questions: 1. is this actually a problem? I mean, by default it's supposed to compile the native targets to a

klib

(not a linked binary) so why is this a problem? Shouldn't it be a problem on the consumer side when actually building a final binary? 2. if it is a problem, how can I solve it? I tried to add this dependency as

implementation

inside the

iosMain

source set, but it doesn't seem to solve the warning I'm tempted to just disable the warning with

kotlin.native.ignoreIncorrectDependencies=true

but I'd like to understand better if it's really a problem first.

Jim

10/08/2021, 5:28 PM

Crossposting for visibility

hsyogesh

10/08/2021, 7:39 PM

Guys I have a used case like getting csrf token from my backend service on post auth call, which is a prerequisite for all my further requests, can i get a help how to achieve this in Ktor as I dont see such used cases mentioned in documentation, bcz my backend service returns 302 with redirection exception, i don't care about exception but what i need is csrf token received from response

Mejdi

10/08/2021, 9:00 PM

👋 To use

SharedFlow

on iOS, do we need to use the

-native-mt

version of kotlinx coroutines ? Same goes with the

Mutex

APIs. Both don’t seem to work using the core version of it. I want to verify this before setting any conclusion. In the docs we set the

common

label against them, would that mean that these are supported in all platforms ?

Eric Ampire [MOD]

10/09/2021, 12:31 PM

Hello, I have created a KMM project where the shared module is named common, I can use easily the common module in the android app but when it came to create the framework for the ios project I got his error Task 'embedAndSignAppleFrameworkForXcode' not found in project ':common'.

pererikbergman

10/09/2021, 2:25 PM

Hello, I am tearing the little I have left of my hair 🙂 I have a KMM project test up and get this error when building from XCode:

Command PhaseScriptExecution failed with a nonzero exit code

Seem to work from Android Studio, even the iOS build… 🤔 If I dig down a little bit into the logs in XCode I find this:

> Task :shared:linkDebugFrameworkIos FAILED
e: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld invocation reported errors
Please try to disable compiler caches and rerun the build. To disable compiler caches, add the following line to the gradle.properties file in the project's root directory:
   
  kotlin.native.cacheKind.iosX64=none
   
Also, consider filing an issue with full Gradle log here: <https://kotl.in/issue>
The /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld command returned non-zero exit code: 1.
output:
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/13.0.0/lib/darwin//libclang_rt.ios.a, missing required architecture x86_64 in file /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/13.0.0/lib/darwin//libclang_rt.ios.a (4 slices)
Undefined symbols for architecture x86_64:
 "___cpu_model", referenced from:
   polyHash_x86(int, unsigned short const*) in libstdlib-cache.a(result.o)
ld: symbol(s) not found for architecture x86_64

FAILURE: Build failed with an exception.

I am totally lost, anyone have any idea or where to start looking?

John O'Reilly

10/09/2021, 6:02 PM

Are people using any particular approach for triggering the execution of shared code when application starts up (other than explicitly invoking from say Android and iOS app layer code at the appropriate time)?

Grégory Lureau

10/10/2021, 1:38 PM

Seeing a weird export for iOS when I define a class inheriting for another open one (or a sealed class). When I've this code:

open class BaseClass(internal val internalVal: String)
class FooBar(val exposedVar: Int) : BaseClass("internalValue")

In Kotlin I only see one and only one FooBar constructor with the

Int

param. But the header from XCFramework exposes 2 constructors

__attribute__((swift_name("BaseClass")))
@interface KmpTestBaseClass : KmpTestBase
- (instancetype)initWithInternalVal:(NSString *)internalVal __attribute__((swift_name("init(internalVal:)"))) __attribute__((objc_designated_initializer));
@end;

__attribute__((objc_subclassing_restricted))
__attribute__((swift_name("FooBar")))
@interface KmpTestFooBar : KmpTestBaseClass
- (instancetype)initWithExposedVar:(int32_t)exposedVar __attribute__((swift_name("init(exposedVar:)"))) __attribute__((objc_designated_initializer));
- (instancetype)initWithInternalVal:(NSString *)internalVal __attribute__((swift_name("init(internalVal:)"))) __attribute__((objc_designated_initializer)) __attribute__((unavailable));
@property (readonly) int32_t exposedVar __attribute__((swift_name("exposedVar")));
@end;

I know I could make the BaseClass constructor private to avoid that export, but it doesn't feel adequate to exposes this 2nd constructor on FooBar anyway... What am I missing? Also I noticed the

unavailable

not sure what this means 😕

KamilH

10/11/2021, 12:26 PM

What could be a reason for the lack of availability of

embedAndSignAppleFrameworkForXcode

task? I’m using

Kotlin 1.5.31

and simply I can’t see this task in my

shared

module.

Gus Ward

10/12/2021, 9:34 AM

Hey! We are getting lots of unresolved dependancies our build files although the project actually builds and runs fine, have tried invalidate caches / restart, deleting .idea & .gradle folders and re importing, updating the the latest version of most dependancies, has anyone solved this issue before? Current set up is Android Studio,

Kotlin 1.5.31

AGP 4.1.3

and its a library project for iOS & Android.

chi

10/12/2021, 10:42 AM

I'm having an issue setting up my multiplatform project for unit testing with Koin. When I add the the Koin jUnit4 dependency it completely breaks every other dependencies as all gets missing.

val commonTest by getting {
    dependencies {
        implementation(kotlin("test-common"))
        implementation(kotlin("test-annotations-common"))
        implementation("io.insert-koin:koin-test:${versions.koin}")
        implementation("io.insert-koin:koin-test-junit4:${versions.koin}")
        implementation("io.mockk:mockk-common:1.12.0")
    }
}

What could be wrong here?

Danish Ansari

10/12/2021, 2:54 PM

I have very simple question regarding KMM. Can I export module (written completely in Kotlin) as an iOS library(same as *.aar in Android) from Windows PC and use it in iOS application project on macOS? Actual requirement: https://kotlinlang.slack.com/archives/C3PQML5NU/p1634050993470800?thread_ts=1634050480.468500&cid=C3PQML5NU

raulraja

10/12/2021, 9:19 PM

Hello! I have a use case where I would like to ship a library with

expect

declarations only in common main and have multiple

actual

different impl on each platform. For example 3 JVM modules that provide 3 different

actual

impls for the common main and same for other platforms like JS. The use case is that users may define programs over the common library but choose different runtime impl in

actual typealias F<A> = CustomImpl<A>

data types for a given expect class depending on how they want their programs to run. Essentially I’d like to push the responsibility to declare the

actual typealias

to the user and not be forced to provide an impl myself. Can this be accomplished with multiplatform modules? Any help is appreciated, I realise this is an odd case and potentially trying to abuse expect / actual for ad-hoc resolution. Thanks!

Title

raulraja

10/12/2021, 9:19 PM

Hello! I have a use case where I would like to ship a library with

expect

declarations only in common main and have multiple

actual

different impl on each platform. For example 3 JVM modules that provide 3 different

actual

impls for the common main and same for other platforms like JS. The use case is that users may define programs over the common library but choose different runtime impl in

actual typealias F<A> = CustomImpl<A>

data types for a given expect class depending on how they want their programs to run. Essentially I’d like to push the responsibility to declare the

actual typealias

Mejdi

10/12/2021, 9:37 PM

why dont you have this part of the actual implementation ? Like having a facade Impl per platform, based on a certain parameters (so runtime flow will control this) it will choose the right implementation among the 3 present.

russhwolf

10/12/2021, 10:10 PM

I typically go with an

interface

rather than an

expect class

for this scenario.

😒ame: 3

raulraja

10/13/2021, 3:02 PM

@Mejdi @russhwolf thanks, I’ll give it some thought. I liked the fact that with actual / expect all abstract declarations in commonMain are like templates that get replaced by real types and not an inheritance relationship. I was able to provide some considerable polymorphic abstraction without the cost of double boxing on interfaces and classes just using the actual typealias.

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