Ktor and kotlinx dependencies not found when building iOS framework - ios

Question

I am trying to include support for ktor and kotlinx (serialization and coroutines to be exact) to my Kotlin/Native project. All libraries work on the Android version of the project, but when I try to compile the Xcode project, I receive errors stating that the kotlinx.serialization and kotlinx.coroutines libraries could not be found:
src/commonMain/kotlin/.../.kt:4:16: error: unresolved reference: coroutines
import kotlinx.coroutines.CoroutineDispatcher
^
src/commonMain/kotlin/.../.kt:5:16: error: unresolved reference: serialization
import kotlinx.serialization.json.JSON
Here is my gradle file for my project:
plugins {
id 'kotlin-multiplatform' version '1.3.11'
id 'kotlinx-serialization' version '1.3.0'
}
ext {
ktor_version = '1.0.1'
kotlinx_version = '1.1.0'
}
repositories {
maven { url "https://kotlin.bintray.com/ktor" }
maven { url "https://kotlin.bintray.com/kotlinx" }
google()
jcenter()
mavenCentral()
}
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android-extensions'
configurations {
compilerPlugin
}
android {
compileSdkVersion 27
defaultConfig {
applicationId "org.jetbrains.kotlin.mpp_app_android"
minSdkVersion 15
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
}
kotlin {
targets {
fromPreset(presets.android, 'android')
// This preset is for iPhone emulator
// Switch here to presets.iosArm64 (or iosArm32) to build library for iPhone device
fromPreset(presets.iosX64, 'ios') {
compilations.main.outputKinds('FRAMEWORK')
}
}
sourceSets {
commonMain {
dependencies {
implementation 'commons-codec:commons-codec:1.10'
implementation 'org.jetbrains.kotlin:kotlin-stdlib-common'
implementation("io.ktor:ktor-client:$ktor_version")
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlinx_version"
implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:0.9.1"
}
}
commonTest {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-test-common'
implementation 'org.jetbrains.kotlin:kotlin-test-annotations-common'
}
}
androidMain {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-stdlib'
implementation("io.ktor:ktor-client-android:$ktor_version")
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$kotlinx_version"
implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.9.1"
}
}
androidTest {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-test'
implementation 'org.jetbrains.kotlin:kotlin-test-junit'
}
}
iosMain {
dependencies {
implementation("io.ktor:ktor-client-ios:$ktor_version")
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core-native:$kotlinx_version"
implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime-native:0.9.1"
}
}
iosTest {
}
}
}
// This task attaches native framework built from ios module to Xcode project
// (see iosApp directory). Don't run this task directly,
// Xcode runs this task itself during its build process.
// Before opening the project from iosApp directory in Xcode,
// make sure all Gradle infrastructure exists (gradle.wrapper, gradlew).
task copyFramework {
def buildType = project.findProperty("kotlin.build.type") ?: "DEBUG"
def target = project.findProperty("kotlin.target") ?: "ios"
dependsOn "link${buildType.toLowerCase().capitalize()}Framework${target.capitalize()}"
doLast {
def srcFile = kotlin.targets."$target".compilations.main.getBinary("FRAMEWORK", buildType)
def targetDir = getProperty("configuration.build.dir")
copy {
from srcFile.parent
into targetDir
include 'app.framework/**'
include 'app.framework.dSYM'
}
}
}
Any help would be greatly appreciated, thanks!

Answer 1

Make sure enableFeaturePreview("GRADLE_METADATA") is in the settings.gradle file. Once I added this line, I was able to compile from Xcode.

Answer 2

I'm having this problem as well. And it suddenly appeared on a project that I've been working on for months. I do have enableFeaturePreview('GRADLE_METADATA') set in settings.gradle. What could be going on? This is really frustrating; my project is suddenly at a standstill for no apparent reason.