Multiplatform

The runtime and code gen have been implemented to be entirely platform-agnostic so far.

Supported Targets for artifacts/features

Artifact/feature	JVM	Android	JS	WASM	Apple	Linux	Windows	Android Native
runtime	✅	✅	✅	✅	✅	✅	✅	✅
interop-javax	✅	✅	―	―	―	―	―	―
interop-jakarta	✅	✅	―	―	―	―	―	―
interop-dagger	✅	✅	―	―	―	―	―	―
interop-guice	✅	✅	―	―	―	―	―	―
—	-	-	-	-	-	-	-	-
Multi-module aggregation	✅ Kotlin 2.3.0+	✅ Kotlin 2.3.20+	🟡 Kotlin 2.3.21+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+
Top-level function injection	✅ Kotlin 2.3.0+	✅ Kotlin 2.3.20+	🟡 Kotlin 2.3.21+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+	✅ Kotlin 2.3.20+

🟡 — Kotlin/JS does not yet support generating top-level declarations from compiler plugins on any version with incremental compilation enabled. Please star https://youtrack.jetbrains.com/issue/KT-82395 and https://youtrack.jetbrains.com/issue/KT-82989.

Legend:

• WASM:
  • wasmJs
  • wasmWasi
• Apple:
  • macOS (arm64)
  • iOS (x64, arm64, simulatorArm64)
  • watchOS (arm32, arm64, deviceArm64, simulatorArm64)
  • tvOS (arm64, simulatorArm64)
• Linux:
  • linuxX64
  • linuxArm64
• Windows:
  • mingwX64
• Android Native:
  • androidNativeArm32
  • androidNativeArm64
  • androidNativeX86
  • androidNativeX64

When mixing contributions between common and platform-specific source sets, you must define your final @DependencyGraph in the platform-specific code. This is because a graph defined in commonMain wouldn’t have full visibility of contributions from platform-specific types. A good pattern for this is to define your canonical graph in commonMain without a @DependencyGraph annotation and then a {Platform}{Graph} type in the platform source set that extends it and does have the @DependencyGraph. Metro automatically exposes bindings of the base graph type on the graph for any injections that need it.

// In commonMain
interface AppGraph {
  val httpClient: HttpClient
}

// In jvmMain
@DependencyGraph
interface JvmAppGraph : AppGraph {
  @Provides fun provideHttpClient(): HttpClient = HttpClient(Netty)
}

// In androidMain
@DependencyGraph
interface AndroidAppGraph : AppGraph {
  @Provides fun provideHttpClient(): HttpClient = HttpClient(OkHttp)
}