From 5d062c962ec342195873abcb098fa7e571e1094c Mon Sep 17 00:00:00 2001
From: Jun Sekine <jun@sakamo.to>
Date: Thu, 14 May 2026 00:28:28 +0900
Subject: [PATCH] Add wasmWasi target

- Declare wasmWasi(nodejs) in build.gradle.kts so commonMain (kotlinx-io
  based reader/writer) compiles for WASI runtimes.
- Disable compileTestKotlinWasmWasi / wasmWasiTest / wasmWasiNodeTest
  until Kotest publishes wasmWasi artifacts; commonTest cannot be
  compiled for this target otherwise.
- Add compileKotlinWasmWasi to the Linux CI job to guard against
  regressions.
---
 .github/workflows/build_and_test.yml |  2 +-
 build.gradle.kts                     | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index bc27ed9..e13b65a 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -26,7 +26,7 @@ jobs:
 
       - name: Run Linux, JVM, JS checks and generate coverage report
         run: |
-          ./gradlew clean jvmTest jsNodeTest linuxX64Test compileKotlinLinuxArm64 compileTestKotlinLinuxArm64 checkKotlinAbi koverXmlReport
+          ./gradlew clean jvmTest jsNodeTest linuxX64Test compileKotlinLinuxArm64 compileTestKotlinLinuxArm64 compileKotlinWasmWasi checkKotlinAbi koverXmlReport
 
       - name: Upload coverage report to Codecov
         uses: codecov/codecov-action@v4
diff --git a/build.gradle.kts b/build.gradle.kts
index 8e9b35c..79a22d2 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,7 @@
 import com.vanniktech.maven.publish.JavadocJar
 import com.vanniktech.maven.publish.KotlinMultiplatform
 import com.vanniktech.maven.publish.SourcesJar
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
 
@@ -40,6 +41,11 @@ kotlin {
     linuxArm64()
     mingwX64()
 
+    @OptIn(ExperimentalWasmDsl::class)
+    wasmWasi {
+        nodejs()
+    }
+
     sourceSets {
         commonMain {
             dependencies {
@@ -73,6 +79,12 @@ tasks.withType<Test>().configureEach {
     useJUnitPlatform()
 }
 
+// Kotest 6.x does not publish wasmWasi artifacts yet, so commonTest cannot be
+// compiled for this target. Validate main compilation only until upstream support lands.
+listOf("compileTestKotlinWasmWasi", "wasmWasiTest", "wasmWasiNodeTest").forEach { taskName ->
+    tasks.matching { it.name == taskName }.configureEach { enabled = false }
+}
+
 // Kotest 6.x JVM artifacts are built with Java 11 bytecode, while the library
 // artifact itself still targets Java 8 for consumer compatibility.
 tasks.named<KotlinJvmCompile>("compileTestKotlinJvm") {