[Gradle] IdePlatformCinteropDependencyResolver: Retain cinterops for IDE in .gradle

^KT-56337 Verification Pending

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/ide/dependencyResolvers/IdePlatformCinteropDependencyResolver.kt

@@ -11,17 +11,40 @@ import org.jetbrains.kotlin.gradle.idea.tcs.IdeaKotlinDependency
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
 import org.jetbrains.kotlin.gradle.plugin.ide.IdeDependencyResolver
 import org.jetbrains.kotlin.gradle.plugin.ide.IdeMultiplatformImport
+import org.jetbrains.kotlin.gradle.plugin.mpp.kotlinCInteropLibraryDirectoryForIde
 import org.jetbrains.kotlin.gradle.plugin.sources.DefaultKotlinSourceSet
 import org.jetbrains.kotlin.gradle.targets.native.internal.getPlatformCinteropDependenciesOrEmpty
+import org.jetbrains.kotlin.gradle.utils.crc32ChecksumString
+import java.io.File
 
 internal object IdePlatformCinteropDependencyResolver : IdeDependencyResolver, IdeDependencyResolver.WithBuildDependencies {
     override fun resolve(sourceSet: KotlinSourceSet): Set<IdeaKotlinDependency> {
         if (sourceSet !is DefaultKotlinSourceSet) return emptySet()
         val project = sourceSet.project
-        val cinteropFiles = project.getPlatformCinteropDependenciesOrEmpty(sourceSet)
+
+        val cinteropFiles = project.getPlatformCinteropDependenciesOrEmpty(sourceSet).map { file ->
+            project.copyCInteropFileForIdeIfNecessary(file)
+        }
+
         return project.resolveCInteropDependencies(cinteropFiles)
     }
 
+    /**
+     * Copies the file into a directory specifically for the IDE, so it survives ./gradlew clean
+     */
+    private fun Project.copyCInteropFileForIdeIfNecessary(file: File): File {
+        if (!file.exists()) return file
+        val newFileName = "${file.nameWithoutExtension}-${file.crc32ChecksumString()}.${file.extension}"
+        val outputFile = kotlinCInteropLibraryDirectoryForIde.resolve(newFileName)
+
+        /* Copy only if really necessary */
+        if (!outputFile.exists()) {
+            file.copyTo(outputFile)
+        }
+
+        return outputFile
+    }
+
     override fun dependencies(project: Project): Iterable<Any> {
         return project.kotlinExtension.sourceSets.mapNotNull { sourceSet ->
             if (sourceSet !is DefaultKotlinSourceSet) return@mapNotNull null

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/ide/dependencyResolvers/resolveCinteropDependency.kt

@@ -6,15 +6,14 @@
 package org.jetbrains.kotlin.gradle.plugin.ide.dependencyResolvers
 
 import org.gradle.api.Project
-import org.gradle.api.file.FileCollection
 import org.jetbrains.kotlin.gradle.idea.tcs.*
 import org.jetbrains.kotlin.gradle.idea.tcs.extras.klibExtra
 import org.jetbrains.kotlin.gradle.plugin.ide.KlibExtra
 import org.jetbrains.kotlin.konan.file.File
 import org.jetbrains.kotlin.library.*
 
-internal fun Project.resolveCInteropDependencies(cinteropFiles: FileCollection): Set<IdeaKotlinDependency> {
-    return cinteropFiles.files
+internal fun Project.resolveCInteropDependencies(cinteropFiles: Iterable<java.io.File>): Set<IdeaKotlinDependency> {
+    return cinteropFiles
         .filter { it.isDirectory || it.extension == KLIB_FILE_EXTENSION }
         .mapNotNull { libraryFile -> this.createCinteropLibraryDependency(libraryFile) }
         .toSet()

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/CompositeMetadataArtifactImpl.kt

@@ -5,15 +5,13 @@
 
 package org.jetbrains.kotlin.gradle.plugin.mpp
 
+import org.jetbrains.kotlin.gradle.utils.checksumString
 import org.jetbrains.kotlin.gradle.utils.copyPartially
 import org.jetbrains.kotlin.gradle.utils.ensureValidZipDirectoryPath
 import org.jetbrains.kotlin.gradle.utils.listDescendants
 import java.io.Closeable
 import java.io.File
 import java.io.IOException
-import java.nio.ByteBuffer
-import java.util.*
-import java.util.Base64.Encoder
 import java.util.zip.CRC32
 import java.util.zip.ZipEntry
 import java.util.zip.ZipFile
@@ -192,10 +190,6 @@ internal class CompositeMetadataArtifactImpl(
      */
     private class ArtifactFile(private val file: File) : Closeable {
 
-        companion object {
-            val checksumStringEncoder: Encoder = Base64.getUrlEncoder().withoutPadding()
-        }
-
         private var isClosed = false
 
         private val lazyZip = lazy {
@@ -212,7 +206,7 @@ internal class CompositeMetadataArtifactImpl(
         val checksum: String by lazy(LazyThreadSafetyMode.NONE) {
             val crc32 = CRC32()
             entries.forEach { entry -> crc32.update(entry.crc.toInt()) }
-            checksumStringEncoder.encodeToString(ByteBuffer.allocate(4).putInt(crc32.value.toInt()).array())
+            checksumString(crc32.value.toInt())
         }
 
         /**

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinMetadataLibraryDirectories.kt

@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.gradle.utils.compositeBuildRootProject
 import java.io.File
 
 private const val kotlinTransformedMetadataLibraries = "kotlinTransformedMetadataLibraries"
+private const val kotlinCInteropLibraries = "kotlinCInteropLibraries"
 private const val kotlinTransformedCInteropMetadataLibraries = "kotlinTransformedCInteropMetadataLibraries"
 
 internal fun ProjectLayout.kotlinTransformedMetadataLibraryDirectoryForBuild(sourceSetName: String): File =
@@ -22,5 +23,8 @@ internal val Project.kotlinTransformedMetadataLibraryDirectoryForIde: File
 internal fun ProjectLayout.kotlinTransformedCInteropMetadataLibraryDirectoryForBuild(sourceSetName: String): File =
     buildDirectory.get().asFile.resolve(kotlinTransformedCInteropMetadataLibraries).resolve(sourceSetName)
 
+internal val Project.kotlinCInteropLibraryDirectoryForIde: File
+    get() = compositeBuildRootProject.rootDir.resolve(".gradle").resolve("kotlin").resolve(kotlinCInteropLibraries)
+
 internal val Project.kotlinTransformedCInteropMetadataLibraryDirectoryForIde: File
     get() = compositeBuildRootProject.rootDir.resolve(".gradle").resolve("kotlin").resolve(kotlinTransformedCInteropMetadataLibraries)

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/utils/checksumUtils.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2010-2023 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.utils
+
+import java.io.BufferedInputStream
+import java.io.File
+import java.nio.ByteBuffer
+import java.util.*
+import java.util.zip.CRC32
+
+private val checksumStringEncoder: Base64.Encoder = Base64.getUrlEncoder().withoutPadding()
+
+internal fun File.crc32Checksum(): Int {
+    val crc32 = CRC32()
+    val buffer = ByteArray(2048)
+    BufferedInputStream(inputStream()).use { fileStream ->
+        while (true) {
+            val read = fileStream.read(buffer)
+            if (read < 0) break
+            crc32.update(buffer, 0, read)
+        }
+    }
+    return crc32.value.toInt()
+}
+
+internal fun File.crc32ChecksumString(): String {
+    return checksumString(crc32Checksum())
+}
+
+internal fun checksumString(checksum: Int): String {
+    return checksumString(ByteBuffer.allocate(4).putInt(checksum).array())
+}
+
+internal fun checksumString(checksum: ByteArray): String {
+    return checksumStringEncoder.encodeToString(checksum)
+}