[Gradle] HierarchicalNativeDistributionCommonizerTask: Implement project global caching

- Implement NativeDistributionCommonizationCache which will act similar
to the 'SuccessMarker' used in the non hierarchical commonization task.

- Implement 'kotlin.mpp.enableNativeDistributionCommonizationCache'
Gradle property to disable project global caching. The cache is
turned on by default.

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

@@ -19,9 +19,24 @@ class CommonizerIT : BaseGradleIT() {
     @Test
     fun `test commonizeNativeDistributionWithIosLinuxWindows`() {
         with(Project("commonizeNativeDistributionWithIosLinuxWindows")) {
-            build(":p1:commonize") {
+            build(":p1:commonize", "-Pkotlin.mpp.enableNativeDistributionCommonizationCache=false") {
                 assertTasksExecuted(":p1:commonizeNativeDistribution")
                 assertContains(DISABLED_NATIVE_TARGETS_REPORTER_WARNING_PREFIX)
+                assertContains("Kotlin KLIB commonizer:")
+                assertSuccessful()
+            }
+
+            build(":p1:commonize", "--rerun-tasks", "-Pkotlin.mpp.enableNativeDistributionCommonizationCache=true") {
+                assertTasksExecuted(":p1:commonizeNativeDistribution")
+                assertContains("Native Distribution Commonization: Cache hit")
+                assertNotContains("Kotlin KLIB commonizer:")
+                assertSuccessful()
+            }
+
+            build(":p1:commonize", "--rerun-tasks", "-Pkotlin.mpp.enableNativeDistributionCommonizationCache=false") {
+                assertTasksExecuted(":p1:commonizeNativeDistribution")
+                assertContains("Native Distribution Commonization: Cache disabled")
+                assertContains("Kotlin KLIB commonizer:")
                 assertSuccessful()
             }
         }

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinProperties.kt

@@ -230,6 +230,9 @@ internal class PropertiesProvider private constructor(private val project: Proje
     val enableHierarchicalCommonization: Boolean
         get() = booleanProperty("kotlin.mpp.enableHierarchicalCommonization") ?: true
 
+    val enableNativeDistributionCommonizationCache: Boolean
+        get() = booleanProperty("kotlin.mpp.enableNativeDistributionCommonizationCache") ?: true
+
     /**
      * Dependencies caching strategy for all targets that support caches.
      */

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/HierarchicalNativeDistributionCommonizerTask.kt

@@ -81,8 +81,8 @@ internal open class HierarchicalNativeDistributionCommonizerTask : DefaultTask()
     @TaskAction
     protected fun run() {
         for (target in rootCommonizerTargets) {
-            getRootOutputDirectory(target).deleteRecursively()
+            NativeDistributionCommonizationCache(commonizerRunner, getRootOutputDirectory(target))
-            commonizerRunner.run(getCommandLineArguments(target))
+                .runIfNecessary(getCommandLineArguments(target))
         }
     }
 
@@ -111,3 +111,4 @@ private val String.base64
     get() = base64Encoder.encodeToString(toByteArray(StandardCharsets.UTF_8))
 
 private val base64Encoder = Base64.getEncoder().withoutPadding()
+

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/NativeDistributionCommonizationCache.kt

@@ -0,0 +1,56 @@
+/*
+ * 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.targets.native.internal
+
+import org.gradle.api.Project
+import org.jetbrains.kotlin.compilerRunner.KotlinToolRunner
+import org.jetbrains.kotlin.gradle.plugin.PropertiesProvider
+import java.io.File
+
+internal val Project.isNativeDistributionCommonizationCacheEnabled: Boolean
+    get() = PropertiesProvider(this).enableNativeDistributionCommonizationCache
+
+internal class NativeDistributionCommonizationCache(
+    private val runner: KotlinToolRunner,
+    private val outputDirectory: File
+) {
+    private val successMarker = outputDirectory.resolve(".commonized")
+
+    fun runIfNecessary(args: List<String>) {
+        if (!isCached(args)) {
+            run(args)
+        }
+    }
+
+    private fun isCached(args: List<String>): Boolean {
+        if (!runner.project.isNativeDistributionCommonizationCacheEnabled) {
+            runner.project.logger.info("Native Distribution Commonization: Cache disabled")
+            return false
+        }
+
+        if (successMarker.exists() && successMarker.isFile) {
+            if (successMarker.readText() == successMarkerText(args)) {
+                runner.project.logger.info("Native Distribution Commonization: Cache hit for ${outputDirectory.path}")
+                return true
+            } else {
+                runner.project.logger.info("Native Distribution Commonization: Cache miss. Different args")
+                successMarker.delete()
+            }
+        }
+
+        return false
+    }
+
+    private fun run(args: List<String>) {
+        outputDirectory.deleteRecursively()
+        runner.run(args)
+        successMarker.writeText(successMarkerText(args))
+    }
+
+    private fun successMarkerText(args: List<String>): String {
+        return args.joinToString("\n")
+    }
+}