grpc: Add KMP sample project

grpc/grpc-core/src/nativeMain/kotlin/kotlinx/rpc/grpc/internal/utils.kt

@@ -189,7 +189,8 @@ internal fun grpc_status_code.toKotlin(): StatusCode = when (this) {
     grpc_status_code.GRPC_STATUS_UNAVAILABLE -> StatusCode.UNAVAILABLE
     grpc_status_code.GRPC_STATUS_DATA_LOSS -> StatusCode.DATA_LOSS
     grpc_status_code.GRPC_STATUS_UNAUTHENTICATED -> StatusCode.UNAUTHENTICATED
-    grpc_status_code.GRPC_STATUS__DO_NOT_USE -> error("Invalid status code: ${this.ordinal}")
+    grpc_status_code.GRPC_STATUS__DO_NOT_USE -> error("Invalid status code: $this")
+    else -> error("Invalid status code: $this")
 }
 
 internal fun StatusCode.toRawCallAllocation(): grpc_status_code = when (this) {

protobuf/protobuf-core/build.gradle.kts

@@ -86,3 +86,14 @@ tasks.withType<BufGenerateTask>().configureEach {
         outputDirectory = generatedCodeDir
     }
 }
+
+// TODO: What is the correct way to declare this dependency? (KRPC-223)
+//  (without it fails when executing "publishAllPublicationsToBuildRepository")"
+val bufGenerateCommonMain = tasks.named("bufGenerateCommonMain")
+
+tasks.withType<org.gradle.jvm.tasks.Jar>().configureEach {
+    // Only for sources jars
+    if (archiveClassifier.orNull == "sources" || name.endsWith("SourcesJar")) {
+        dependsOn(bufGenerateCommonMain)
+    }
+}

samples/grpc-kmp-app/.gitignore

@@ -0,0 +1,18 @@
+*.iml
+.kotlin
+.gradle
+**/build/
+xcuserdata
+!src/**/build/
+local.properties
+.idea
+.DS_Store
+captures
+.externalNativeBuild
+.cxx
+*.xcodeproj/*
+!*.xcodeproj/project.pbxproj
+!*.xcodeproj/xcshareddata/
+!*.xcodeproj/project.xcworkspace/
+!*.xcworkspace/contents.xcworkspacedata
+**/xcshareddata/WorkspaceSettings.xcsettings

samples/grpc-kmp-app/README.md

@@ -0,0 +1,45 @@
+This is a Kotlin Multiplatform project targeting iOS, Desktop (JVM), Server, demonstrating the `kotlinx.rpc` library 
+for gRPC.
+
+* [/composeApp](./composeApp/src) is for code that will be shared across Compose Multiplatform applications.
+  - [commonMain](./composeApp/src/commonMain/kotlin) contains all the relevant gRPC client application code for all platforms.
+
+* [/server](./server/src/main/kotlin) is for the gRPC server application.
+
+* [/shared](./shared/src) is for the code that will be shared between all targets in the project.
+  It contains the proto files and the generated code used by both, the server and the client applications.
+
+### Build and Run Desktop (JVM) Application
+
+To build and run the development version of the desktop app, use the run configuration from the run widget
+in your IDE’s toolbar or run it directly from the terminal:
+- on macOS/Linux
+  ```shell
+  ./gradlew :composeApp:run
+  ```
+- on Windows
+  ```shell
+  .\gradlew.bat :composeApp:run
+  ```
+
+### Build and Run Server
+
+To build and run the server, use the run configuration from the run widget
+in your IDE’s toolbar or run it directly from the terminal:
+- on macOS/Linux
+  ```shell
+  ./gradlew :server:run
+  ```
+- on Windows
+  ```shell
+  .\gradlew.bat :server:run
+  ```
+
+### Build and Run iOS Application
+
+To build and run the development version of the iOS app, use the run configuration from the run widget
+in your IDE’s toolbar or open the [/iosApp](./iosApp) directory in Xcode and run it from there.
+
+---
+
+Learn more about [Kotlin Multiplatform](https://www.jetbrains.com/help/kotlin-multiplatform-dev/get-started.html)…

samples/grpc-kmp-app/build.gradle.kts

@@ -0,0 +1,10 @@
+plugins {
+    // this is necessary to avoid the plugins to be loaded multiple times
+    // in each subproject's classloader
+    alias(libs.plugins.composeHotReload) apply false
+    alias(libs.plugins.composeMultiplatform) apply false
+    alias(libs.plugins.composeCompiler) apply false
+    alias(libs.plugins.kotlinJvm) apply false
+    alias(libs.plugins.kotlinMultiplatform) apply false
+    alias(libs.plugins.kotlinxRpc) apply false
+}

samples/grpc-kmp-app/composeApp/build.gradle.kts

@@ -0,0 +1,60 @@
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+
+plugins {
+    alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.composeMultiplatform)
+    alias(libs.plugins.composeCompiler)
+    alias(libs.plugins.composeHotReload)
+}
+
+kotlin {
+    listOf(
+        iosArm64(),
+        iosSimulatorArm64()
+    ).forEach { iosTarget ->
+        iosTarget.binaries.framework {
+            baseName = "ComposeApp"
+            isStatic = true
+        }
+    }
+
+    jvm()
+
+    sourceSets {
+        commonMain.dependencies {
+            implementation(compose.runtime)
+            implementation(compose.foundation)
+            implementation(compose.material3)
+            implementation(compose.ui)
+            implementation(compose.components.resources)
+            implementation(compose.components.uiToolingPreview)
+            implementation(libs.androidx.lifecycle.viewmodelCompose)
+            implementation(libs.androidx.lifecycle.runtimeCompose)
+            implementation(libs.kotlinx.datetime)
+            implementation(libs.kotlinx.rpc.protobuf.core)
+            implementation(libs.kotlinx.rpc.grpc.core)
+            implementation(libs.grpc.netty)
+            implementation(projects.shared)
+        }
+        commonTest.dependencies {
+            implementation(libs.kotlin.test)
+        }
+        jvmMain.dependencies {
+            implementation(compose.desktop.currentOs)
+            implementation(libs.kotlinx.coroutinesSwing)
+        }
+    }
+}
+
+
+compose.desktop {
+    application {
+        mainClass = "kotlinx.rpc.sample.MainKt"
+
+        nativeDistributions {
+            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+            packageName = "kotlinx.rpc.sample"
+            packageVersion = "1.0.0"
+        }
+    }
+}

samples/grpc-kmp-app/composeApp/src/commonMain/composeResources/drawable/compose-multiplatform.xml

@@ -0,0 +1,44 @@
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="450dp"
+    android:height="450dp"
+    android:viewportWidth="64"
+    android:viewportHeight="64">
+  <path
+      android:pathData="M56.25,18V46L32,60 7.75,46V18L32,4Z"
+      android:fillColor="#6075f2"/>
+  <path
+      android:pathData="m41.5,26.5v11L32,43V60L56.25,46V18Z"
+      android:fillColor="#6b57ff"/>
+  <path
+      android:pathData="m32,43 l-9.5,-5.5v-11L7.75,18V46L32,60Z">
+    <aapt:attr name="android:fillColor">
+      <gradient
+          android:centerX="23.131"
+          android:centerY="18.441"
+          android:gradientRadius="42.132"
+          android:type="radial">
+        <item android:offset="0" android:color="#FF5383EC"/>
+        <item android:offset="0.867" android:color="#FF7F52FF"/>
+      </gradient>
+    </aapt:attr>
+  </path>
+  <path
+      android:pathData="M22.5,26.5 L32,21 41.5,26.5 56.25,18 32,4 7.75,18Z">
+    <aapt:attr name="android:fillColor">
+      <gradient
+          android:startX="44.172"
+          android:startY="4.377"
+          android:endX="17.973"
+          android:endY="34.035"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF33C3FF"/>
+        <item android:offset="0.878" android:color="#FF5383EC"/>
+      </gradient>
+    </aapt:attr>
+  </path>
+  <path
+      android:pathData="m32,21 l9.526,5.5v11L32,43 22.474,37.5v-11z"
+      android:fillColor="#000000"/>
+</vector>