Update Kotlin 1 -> 2 and support ES Modules

Author: SalvatoreT

README.md

@@ -6,22 +6,18 @@ In addition to [Wrangler v2.x](https://github.com/cloudflare/wrangler2) you will
 
 ## Wrangler
 
-Configure the [wrangler.toml](wrangler.toml) by filling in the `account_id` from the Workers pages of your Cloudflare Dashboard.
+Documentation for Wrangler can be found [here](https://developers.cloudflare.com/workers/tooling/wrangler).
 
-Further documentation for Wrangler can be found [here](https://developers.cloudflare.com/workers/tooling/wrangler).
-
-## Gradle
-
-After setting up Kotlin per the linked instructions above,
+To test the build locally, run it in dev.
 
-```
-./gradlew :compileProductionExecutableKotlinJs
+```shell
+wrangler dev
 ```
 
-That will compile your code and package it into a JavaScript executable, after which you can run `wrangler publish` to push it to Cloudflare.
+To deploy the example, use the following command.
 
-```
-wrangler publish build/js/packages/kotlin-worker-hello-world/kotlin/kotlin-worker-hello-world.js
+```shell
+wrangler deploy
 ```
 
-For more information on interop between Kotlin and Javascript, see the [Kotlin docs](https://kotlinlang.org/docs/reference/js-interop.html).  Regarding coroutines, see [this issue and workaround](https://github.com/cloudflare/kotlin-worker-hello-world/issues/2)
+For more information on interop between Kotlin and Javascript, see the [Kotlin docs](https://kotlinlang.org/docs/js-interop.html).  Regarding coroutines, see [this issue and workaround](https://github.com/cloudflare/kotlin-worker-hello-world/issues/2)

build.gradle.kts

@@ -1,5 +1,7 @@
+import org.jetbrains.kotlin.gradle.dsl.KotlinJsCompile
+
 plugins {
-    kotlin("js") version "1.7.10"
+    kotlin("multiplatform") version "2.2.10"
 }
 
 group = "org.example"
@@ -10,9 +12,33 @@ repositories {
 }
 
 kotlin {
-    js(IR) {
-        nodejs {
-        }
+    js {
+        nodejs()
         binaries.executable()
     }
 }
+
+// https://kotlinlang.org/docs/js-project-setup.html#support-for-es2015-features
+tasks.withType<KotlinJsCompile>().configureEach {
+    compilerOptions {
+        target.set("es2015")
+    }
+}
+
+tasks.named("jsProductionExecutableCompileSync") {
+    val entrypointFile = "${layout.buildDirectory.asFile.get()}/js/packages/kotlin-worker-hello-world/kotlin/kotlin-worker-hello-world.mjs"
+    outputs.file(entrypointFile)
+
+    val jsEntrypoint = """
+            // The entrypoint expected by Cloudflare
+            export default {
+                async fetch(request, env, ctx) {
+                    return HelloWorker.fetch(request, env, ctx);
+                },
+            };
+        """.trimIndent()
+
+    doLast {
+        File(entrypointFile).appendText(jsEntrypoint)
+    }
+}

gradle.properties

@@ -1,2 +1,3 @@
 kotlin.code.style=official
-kotlin.js.ir.output.granularity=whole-program
+kotlin.js.ir.output.granularity=whole-program
+org.gradle.configuration-cache=true

gradle/wrapper/gradle-wrapper.jar

@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists