Add a test for host-specific metadata publishing and consumption

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/KlibBasedMppIT.kt

@@ -9,8 +9,10 @@ import org.jetbrains.kotlin.gradle.util.modify
 import org.jetbrains.kotlin.konan.target.HostManager
 import org.junit.Assume
 import java.io.File
+import java.util.zip.ZipFile
 import kotlin.test.Test
 import kotlin.test.assertFalse
+import kotlin.test.assertTrue
 
 class KlibBasedMppIT : BaseGradleIT() {
     override val defaultGradleVersion = GradleVersionRequired.AtLeast("6.0")
@@ -32,6 +34,7 @@ class KlibBasedMppIT : BaseGradleIT() {
     fun testBuildWithPublishedDependency() = testBuildWithDependency {
         build(":$dependencyModuleName:publish") {
             assertSuccessful()
+            checkPublishedHostSpecificMetadata(this@build)
         }
 
         gradleBuildScript().appendText("\n" + """
@@ -81,7 +84,8 @@ class KlibBasedMppIT : BaseGradleIT() {
 
         val tasksToExecute = listOf(
             ":compileJvmAndJsMainKotlinMetadata",
-            ":compileLinuxMainKotlinMetadata"
+            ":compileLinuxMainKotlinMetadata",
+            ":compile${hostSpecificSourceSet.capitalize()}KotlinMetadata"
         )
 
         build("assemble") {
@@ -109,6 +113,51 @@ class KlibBasedMppIT : BaseGradleIT() {
         }
     }
 
+    private val hostSpecificSourceSet = when {
+        HostManager.hostIsMac -> "iosMain"
+        HostManager.hostIsLinux -> "embeddedMain"
+        HostManager.hostIsMingw -> "windowsMain"
+        else -> error("unexpected host")
+    }
+
+    private fun checkPublishedHostSpecificMetadata(compiledProject: CompiledProject) = with(compiledProject) {
+        val groupDir = project.projectDir.resolve("repo/com/example")
+
+        assertTasksExecuted(":$dependencyModuleName:compile${hostSpecificSourceSet.capitalize()}KotlinMetadata")
+
+        // Check that the metadata JAR doesn't contain the host-specific source set entries, but contains the shared-Native source set
+        // that can be built on every host:
+
+        ZipFile(groupDir.resolve("$dependencyModuleName-metadata/1.0/$dependencyModuleName-metadata-1.0.jar")).use { metadataJar ->
+            assertTrue { metadataJar.entries().asSequence().none { it.name.startsWith(hostSpecificSourceSet) } }
+            assertTrue { metadataJar.entries().asSequence().any { it.name.startsWith("linuxMain") } }
+        }
+
+        // Then check that in the host-specific modules, there's a metadata artifact that contains the host-specific source set but not the
+        // common source sets:
+
+        val hostSpecificTargets = when {
+            HostManager.hostIsMac -> listOf("iosArm64", "iosX64")
+            HostManager.hostIsLinux -> listOf("linuxMips32", "linuxMipsel32")
+            HostManager.hostIsMingw -> listOf("mingwX64", "mingwX86")
+            else -> error("unexpected host")
+        }
+
+        hostSpecificTargets.forEach { targetName ->
+            val moduleName = "$dependencyModuleName-${targetName.toLowerCase()}"
+            ZipFile(groupDir.resolve("$moduleName/1.0/$moduleName-1.0-metadata.jar")).use { metadataJar ->
+                assertTrue { metadataJar.entries().asSequence().any { it.name.startsWith(hostSpecificSourceSet) } }
+                assertTrue { metadataJar.entries().asSequence().none { it.name.startsWith("commonMain") } }
+            }
+        }
+
+        // Also check that the targets that don't include any host-specific sources don't even have the metadata artifact:
+
+        groupDir.resolve("$dependencyModuleName-linuxx64/1.0/$dependencyModuleName-linuxx64-1.0-metadata.jar").let { metadataJar ->
+            assertTrue { !metadataJar.exists() }
+        }
+    }
+
     private val transitiveDepModuleName = "transitive-dep"
 
     @Test

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/common-klib-lib-and-app/build.gradle.kts

@@ -18,6 +18,17 @@ kotlin {
 	linuxX64()
 	linuxArm64()
 
+	// Linux-specific targets – embedded:
+	linuxMips32()
+	linuxMipsel32()
+
+	// macOS-specific targets - created by the ios() shortcut:
+	ios()
+
+	// Windows-specific targets:
+	mingwX64()
+	mingwX86()
+
 	sourceSets {
 		val commonMain by getting {
 			dependencies {
@@ -29,6 +40,11 @@ kotlin {
 			dependsOn(commonMain)
 		}
 
+
+		configure(listOf(linuxX64(), linuxArm64())) {
+			compilations["main"].defaultSourceSet.dependsOn(linuxMain)
+		}
+
 		val jvmAndJsMain by creating {
 			dependsOn(commonMain)
 		}
@@ -47,8 +63,20 @@ kotlin {
 			}
 		}
 
-		configure(listOf(linuxX64(), linuxArm64())) {
-			compilations["main"].defaultSourceSet.dependsOn(linuxMain)
+		val embeddedMain by creating {
+			dependsOn(commonMain)
+		}
+
+		configure(listOf(linuxMips32(), linuxMipsel32())) {
+			compilations["main"].defaultSourceSet.dependsOn(embeddedMain)
+		}
+
+		val windowsMain by creating {
+			dependsOn(commonMain)
+		}
+
+		configure(listOf(mingwX64(), mingwX86())) {
+			compilations["main"].defaultSourceSet.dependsOn(windowsMain)
 		}
 	}
 }
@@ -60,10 +88,7 @@ publishing {
 }
 
 tasks {
-	val skipCompilationOfTargets = setOf(
-		"linuxX64",
-		"linuxArm64"
-	)
+	val skipCompilationOfTargets = kotlin.targets.matching { it.platformType.toString() == "native" }.names
 	all { 
 		val target = name.removePrefix("compileKotlin").decapitalize()
 		if (target in skipCompilationOfTargets) {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/common-klib-lib-and-app/src/embeddedMain/kotlin/LibEmbeddedMain.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package com.h0tk3y.hmpp.klib.demo
+
+import kotlinx.cinterop.CArrayPointer
+
+actual class LibCommonMainExpect : LibCommonMainIface {
+    actual fun libCommonMainExpectFun(): Unit {
+        println("actualized in embeddedMain")
+        libCommonMainTopLevelFun()
+        println(CArrayPointer::class)
+    }
+
+    fun additionalFunInEmbeddedActual() {
+        println("additional fun in lib embeddedMain")
+    }
+}
+
+fun libLinuxMainFun(): LibCommonMainIface = LibCommonMainExpect()

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/common-klib-lib-and-app/src/iosMain/kotlin/LibIosMain.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package com.h0tk3y.hmpp.klib.demo
+
+import kotlinx.cinterop.CArrayPointer
+
+actual class LibCommonMainExpect : LibCommonMainIface {
+    actual fun libCommonMainExpectFun(): Unit {
+        println("actualized in iosMain")
+        libCommonMainTopLevelFun()
+        println(CArrayPointer::class)
+    }
+
+    fun additionalFunInIosActual() {
+        println("additional fun in lib iosMain")
+    }
+}
+
+fun libLinuxMainFun(): LibCommonMainIface = LibCommonMainExpect()

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/common-klib-lib-and-app/src/linuxMain/kotlin/LibLinuxMain.kt

@@ -9,7 +9,7 @@ import kotlinx.cinterop.CArrayPointer
 
 actual class LibCommonMainExpect : LibCommonMainIface {
     actual fun libCommonMainExpectFun(): Unit {
-        println("actualized in iosMain")
+        println("actualized in linuxMain")
         libCommonMainTopLevelFun()
         println(CArrayPointer::class)
         libCommonMainInternalFun()

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/common-klib-lib-and-app/src/windowsMain/kotlin/LibWindowsMain.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package com.h0tk3y.hmpp.klib.demo
+
+import kotlinx.cinterop.CArrayPointer
+
+actual class LibCommonMainExpect : LibCommonMainIface {
+    actual fun libCommonMainExpectFun(): Unit {
+        println("actualized in windowsMain")
+        libCommonMainTopLevelFun()
+        println(CArrayPointer::class)
+    }
+
+    fun additionalFunInWindowsActual() {
+        println("additional fun in lib windowsMain")
+    }
+}
+
+fun libLinuxMainFun(): LibCommonMainIface = LibCommonMainExpect()