CocoaPods: Skip synthetic task on non-mac hosts

This patch performs the following changes:

1. Create synthetic tasks even if synthetic projects are
not supported on the current host. This change simplifies
configuring dependencies between these tasks and custom user
tasks at the user side.

2. Disable synthetic tasks if synthetic projects are not supported
on the current host

Issue #KT-40834 Fixed

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

@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.gradle.plugin.cocoapods.KotlinCocoapodsPlugin.Compan
 import org.jetbrains.kotlin.gradle.plugin.cocoapods.KotlinCocoapodsPlugin.Companion.POD_SETUP_BUILD_TASK_NAME
 import org.jetbrains.kotlin.gradle.util.modify
 import org.jetbrains.kotlin.konan.target.HostManager
+import org.junit.Assume.assumeFalse
 import org.junit.Assume.assumeTrue
 import org.junit.Test
 import java.io.File
@@ -168,6 +169,28 @@ class CocoaPodsIT : BaseGradleIT() {
         mapOf("kotlin-library" to "foobaz")
     )
 
+    @Test
+    fun testSkippingTasksOnOtherHosts() {
+        assumeFalse(HostManager.hostIsMac)
+
+        with(transformProjectWithPluginsDsl(cocoapodsSingleKtPod, gradleVersion)) {
+            val syntheticTasks = arrayOf(
+                ":podInstall",
+                ":kotlin-library:generateDummyFramework",
+                ":kotlin-library:podGenIOS",
+                ":kotlin-library:podSetupBuildIOS",
+                ":kotlin-library:podBuildDependenciesIOS",
+                ":kotlin-library:podImport"
+            )
+
+            build(*syntheticTasks, "-Pkotlin.native.cocoapods.generate.wrapper=true") {
+                // Check that tasks working with synthetic projects are skipped on non-mac hosts.
+                assertSuccessful()
+                assertTasksSkipped(*syntheticTasks)
+            }
+        }
+    }
+
     private fun BaseGradleIT.Project.useCustomFrameworkName(subproject: String, frameworkName: String, iosAppLocation: String? = null) {
         // Change the name at the Gradle side.
         gradleBuildScript(subproject).appendText(
@@ -234,7 +257,7 @@ class CocoaPodsIT : BaseGradleIT() {
         subprojectsToFrameworkNamesMap: Map<String, String?>,
     ) {
         assumeTrue(HostManager.hostIsMac)
-        assumeTrue(KotlinCocoapodsPlugin.isAvailableToProduceSynthetic())
+        assumeTrue(KotlinCocoapodsPlugin.isAvailableToProduceSynthetic)
 
         val subprojects = subprojectsToFrameworkNamesMap.keys
         val gradleProject = transformProjectWithPluginsDsl(projectName, gradleVersion)

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

@@ -213,8 +213,8 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                     interop.packageName = "cocoapods.${pod.moduleName}"
 
 
-                    if (//TODO ychernyshev improve first check
-                        isAvailableToProduceSynthetic()
+                    if (
+                        isAvailableToProduceSynthetic
                         && project.findProperty(TARGET_PROPERTY) == null
                         && project.findProperty(CONFIGURATION_PROPERTY) == null
                     ) {
@@ -239,8 +239,8 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                         // Since we cannot expand the configuration phase of interop tasks
                         // receiving the required environment variables happens on execution phase.
                         // TODO This needs to be fixed to improve UP-TO-DATE checks.
-                        if (// TODO ychernyshev improve first check
-                            isAvailableToProduceSynthetic()
+                        if (
+                            isAvailableToProduceSynthetic
                             && project.findProperty(TARGET_PROPERTY) == null
                             && project.findProperty(CONFIGURATION_PROPERTY) == null
                         ) {
@@ -305,6 +305,8 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
             it.group = TASK_GROUP
             it.description = "Invokes `pod install` call within Podfile location directory"
             it.cocoapodsExtension = cocoapodsExtension
+            it.onlyIf { isAvailableToProduceSynthetic }
+
             //TODO avoid subproject task management here
             project.allprojects.map { it.tasks.named(POD_SPEC_TASK_NAME, PodspecTask::class.java) }
                 .forEach { podspecTaskProvider ->
@@ -328,6 +330,7 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                 it.kotlinNativeTarget = target
                 it.cocoapodsExtension = cocoapodsExtension
                 it.dependsOn(podspecTaskProvider)
+                it.onlyIf { isAvailableToProduceSynthetic }
             }
         }
     }
@@ -352,6 +355,7 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                 val podGenTaskProvider = project.tasks.named(target.toPodGenTaskName, PodGenTask::class.java)
                 it.podsXcodeProjDirProvider = podGenTaskProvider.get().podsXcodeProjDirProvider
                 it.dependsOn(podGenTaskProvider)
+                it.onlyIf { isAvailableToProduceSynthetic }
             }
         }
     }
@@ -374,6 +378,7 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                 it.podsXcodeProjDirProvider = podSetupBuildTaskProvider.get().podsXcodeProjDirProvider
                 it.buildSettingsFileProvider = podSetupBuildTaskProvider.get().buildSettingsFileProvider
                 it.dependsOn(podSetupBuildTaskProvider)
+                it.onlyIf { isAvailableToProduceSynthetic }
             }
         }
     }
@@ -388,6 +393,7 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
             it.group = TASK_GROUP
             it.description = "Called on Gradle sync, depends on Cinterop tasks for every used pod"
             it.dependsOn(podInstallTaskProvider)
+            it.onlyIf { isAvailableToProduceSynthetic }
 
             kotlinExtension.supportedTargets().all { target ->
                 target.compilations.getByName(KotlinCompilation.MAIN_COMPILATION_NAME).cinterops.all { interop ->
@@ -408,13 +414,14 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
             registerDummyFrameworkTask(project, cocoapodsExtension)
             createSyncTask(project, kotlinExtension)
             registerPodspecTask(project, cocoapodsExtension)
-            if (isAvailableToProduceSynthetic()) {
-                registerPodGenTask(project, kotlinExtension, cocoapodsExtension)
-                registerPodInstallTask(project, cocoapodsExtension)
-                registerPodSetupBuildTasks(project, kotlinExtension, cocoapodsExtension)
-                registerPodBuildTasks(project, kotlinExtension, cocoapodsExtension)
-                registerPodImportTask(project, kotlinExtension)
-            } else {
+
+            registerPodGenTask(project, kotlinExtension, cocoapodsExtension)
+            registerPodInstallTask(project, cocoapodsExtension)
+            registerPodSetupBuildTasks(project, kotlinExtension, cocoapodsExtension)
+            registerPodBuildTasks(project, kotlinExtension, cocoapodsExtension)
+            registerPodImportTask(project, kotlinExtension)
+
+            if (HostManager.hostIsMac && !isAvailableToProduceSynthetic) {
                 logger.quiet(
                     """
                     To take advantage of the new functionality for Cocoapods Integration like synchronizing with the Xcode project 
@@ -457,13 +464,17 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
         const val KOTLIN_TARGET_FOR_IOS_DEVICE = "ios_arm"
         const val KOTLIN_TARGET_FOR_WATCHOS_DEVICE = "watchos_arm"
 
-        fun isAvailableToProduceSynthetic(): Boolean {
+        val isAvailableToProduceSynthetic: Boolean by lazy {
+            if (!HostManager.hostIsMac) {
+                return@lazy false
+            }
+
             val gemListProcess = ProcessBuilder("gem", "list").start()
             val gemListRetCode = gemListProcess.waitFor()
             val gemListOutput = gemListProcess.inputStream.use {
                 it.reader().readText()
             }
-            return gemListRetCode == 0 && gemListOutput.contains("cocoapods-generate")
+            gemListRetCode == 0 && gemListOutput.contains("cocoapods-generate")
         }
     }
 }