[KMM] Fixed project import failure in case of cocoapods integration

#KT-49931

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

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2010-2021 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 org.jetbrains.kotlin.gradle.native
+
+import org.jetbrains.kotlin.gradle.BaseGradleIT
+import org.jetbrains.kotlin.gradle.GradleVersionRequired
+import org.jetbrains.kotlin.gradle.transformProjectWithPluginsDsl
+import org.jetbrains.kotlin.konan.target.HostManager
+import org.junit.Assume
+import org.junit.BeforeClass
+import org.junit.Test
+import kotlin.test.assertTrue
+
+class CocoaPodsNonMacIT : BaseGradleIT() {
+
+    override val defaultGradleVersion: GradleVersionRequired
+        get() = GradleVersionRequired.FOR_MPP_SUPPORT
+
+    @Test
+    fun testImport() {
+        transformProjectWithPluginsDsl(
+            "native-cocoapods-tests"
+        ).build("podImport", "-Pkotlin.native.cocoapods.generate.wrapper=true") {
+            assertSuccessful()
+            assertTrue { output.contains("Kotlin Cocoapods Plugin is fully supported on mac machines only. Gradle tasks that can not run on non-mac hosts will be skipped.") }
+        }
+    }
+
+    companion object {
+        @BeforeClass
+        @JvmStatic
+        fun assumeItsNonMac() {
+            Assume.assumeFalse(HostManager.hostIsMac)
+        }
+    }
+}

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/cocoapods/CocoapodsExtension.kt

@@ -18,6 +18,7 @@ import org.jetbrains.kotlin.gradle.plugin.cocoapods.CocoapodsExtension.Cocoapods
 import org.jetbrains.kotlin.gradle.plugin.mpp.NativeBuildType
 import org.jetbrains.kotlin.gradle.plugin.mpp.Framework
 import org.jetbrains.kotlin.gradle.plugin.mpp.NativeBinary
+import org.jetbrains.kotlin.konan.target.HostManager
 import java.io.File
 import java.net.URI
 
@@ -246,9 +247,11 @@ open class CocoapodsExtension(private val project: Project) {
 
             binary.linkTaskProvider.configure { task ->
 
-                val podBuildTaskProvider = project.getPodBuildTaskProvider(binary.target, pod)
+                if (HostManager.hostIsMac) {
-                task.inputs.file(podBuildTaskProvider.map { it.buildSettingsFile })
+                    val podBuildTaskProvider = project.getPodBuildTaskProvider(binary.target, pod)
-                task.dependsOn(podBuildTaskProvider)
+                    task.inputs.file(podBuildTaskProvider.map { it.buildSettingsFile })
+                    task.dependsOn(podBuildTaskProvider)
+                }
 
                 task.doFirst { _ ->
                     val podBuildSettings = project.getPodBuildSettingsProperties(binary.target, pod)

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/cocoapods/KotlinCocoapodsPlugin.kt

@@ -318,10 +318,11 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                         _extraOptsProp.addAll(project.provider { pod.extraOpts })
                     }
 
-                    val podBuildTaskProvider = project.getPodBuildTaskProvider(target, pod)
+                    if (HostManager.hostIsMac) {
-                    interopTask.inputs.file(podBuildTaskProvider.map {it.buildSettingsFile })
+                        val podBuildTaskProvider = project.getPodBuildTaskProvider(target, pod)
-                    interopTask.dependsOn(podBuildTaskProvider)
+                        interopTask.inputs.file(podBuildTaskProvider.map { it.buildSettingsFile })
-
+                        interopTask.dependsOn(podBuildTaskProvider)
+                    }
                     interopTask.doFirst { _ ->
                         // Since we cannot expand the configuration phase of interop tasks
                         // receiving the required environment variables happens on execution phase.
@@ -691,6 +692,12 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                         If you plan to add dependencies on third party pods, don't forget to install it by executing 'gem install cocoapods-generate' in terminal.
                     """.trimIndent()
                 )
+            } else if (!HostManager.hostIsMac) {
+                logger.warn(
+                    """
+                        Kotlin Cocoapods Plugin is fully supported on mac machines only. Gradle tasks that can not run on non-mac hosts will be skipped.
+                    """.trimIndent()
+                )
             }
             createInterops(project, kotlinExtension, cocoapodsExtension)
             configureTestBinaries(project, cocoapodsExtension)

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/AdvancedCocoapodsTasks.kt

@@ -23,6 +23,7 @@ import org.jetbrains.kotlin.gradle.targets.native.cocoapods.MissingSpecReposMess
 import org.jetbrains.kotlin.gradle.tasks.PodspecTask.Companion.retrievePods
 import org.jetbrains.kotlin.gradle.tasks.PodspecTask.Companion.retrieveSpecRepos
 import org.jetbrains.kotlin.konan.target.Family
+import org.jetbrains.kotlin.konan.target.HostManager
 import java.io.File
 import java.io.IOException
 import java.io.Reader
@@ -47,7 +48,17 @@ val CocoapodsDependency.schemeName: String
  * to obtain sources or artifacts for the declared dependencies.
  * This task is a part of CocoaPods integration infrastructure.
  */
-open class PodInstallTask : DefaultTask() {
+
+open class CocoapodsTask : DefaultTask() {
+    init {
+        onlyIf {
+            HostManager.hostIsMac
+        }
+    }
+}
+
+
+open class PodInstallTask : CocoapodsTask() {
     init {
         onlyIf { podfile.isPresent }
     }
@@ -103,7 +114,7 @@ open class PodInstallTask : DefaultTask() {
     }
 }
 
-abstract class DownloadCocoapodsTask : DefaultTask() {
+abstract class DownloadCocoapodsTask : CocoapodsTask() {
     @get:Input
     internal lateinit var podName: Provider<String>
 }
@@ -371,7 +382,7 @@ private fun runCommand(
  * The task takes the path to the .podspec file and calls `pod gen`
  * to create synthetic xcode project and workspace.
  */
-open class PodGenTask : DefaultTask() {
+open class PodGenTask : CocoapodsTask() {
 
     init {
         onlyIf {
@@ -442,7 +453,7 @@ open class PodGenTask : DefaultTask() {
 }
 
 
-open class PodSetupBuildTask : DefaultTask() {
+open class PodSetupBuildTask : CocoapodsTask() {
 
     @get:Input
     lateinit var frameworkName: Provider<String>
@@ -489,7 +500,7 @@ private fun getBuildSettingFileName(pod: CocoapodsDependency, sdk: String): Stri
 /**
  * The task compiles external cocoa pods sources.
  */
-open class PodBuildTask : DefaultTask() {
+open class PodBuildTask : CocoapodsTask() {
 
     @get:PathSensitive(PathSensitivity.ABSOLUTE)
     @get:InputFile