[Gradle, JS] Implement own IncrementalSyncTask

libraries/tools/kotlin-gradle-plugin-api/api/kotlin-gradle-plugin-api.api

@@ -1484,6 +1484,16 @@ public abstract interface class org/jetbrains/kotlin/gradle/tasks/CompileUsingKo
 	public abstract fun getUseDaemonFallbackStrategy ()Lorg/gradle/api/provider/Property;
 }
 
+public abstract interface class org/jetbrains/kotlin/gradle/tasks/IncrementalSyncTask : org/gradle/api/Task {
+	public abstract fun getDestinationDir ()Ljava/io/File;
+	public abstract fun getDestinationDirectory ()Lorg/gradle/api/provider/Property;
+	public abstract fun getFrom ()Lorg/gradle/api/file/ConfigurableFileCollection;
+}
+
+public final class org/jetbrains/kotlin/gradle/tasks/IncrementalSyncTask$DefaultImpls {
+	public static fun getDestinationDir (Lorg/jetbrains/kotlin/gradle/tasks/IncrementalSyncTask;)Ljava/io/File;
+}
+
 public abstract interface class org/jetbrains/kotlin/gradle/tasks/Kapt : org/jetbrains/kotlin/gradle/tasks/BaseKapt {
 	public abstract fun getAddJdkClassesToClasspath ()Lorg/gradle/api/provider/Property;
 	public abstract fun getKaptJars ()Lorg/gradle/api/file/ConfigurableFileCollection;

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/IncrementalSyncTask.kt

@@ -0,0 +1,24 @@
+package org.jetbrains.kotlin.gradle.tasks
+
+import org.gradle.api.Task
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.*
+import org.gradle.work.NormalizeLineEndings
+import java.io.File
+
+interface IncrementalSyncTask : Task {
+    @get:InputFiles
+    @get:NormalizeLineEndings
+    @get:IgnoreEmptyDirectories
+    @get:SkipWhenEmpty
+    val from: ConfigurableFileCollection
+
+    @get:OutputDirectory
+    val destinationDirectory: Property<File>
+
+    @get:Internal
+    @Deprecated("Use destinationDirProperty with Provider API", ReplaceWith("destinationDirProperty.get()"))
+    val destinationDir: File
+        get() = destinationDirectory.get()
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kotlin2JsGradlePluginIT.kt

@@ -209,7 +209,6 @@ class Kotlin2JsIrGradlePluginIT : AbstractKotlin2JsGradlePluginIT(true) {
                 assertTasksExecuted(":app:developmentExecutableCompileSync")
 
                 assertFileInProjectNotExists("build/js/packages/kotlin-js-browser-app/kotlin/foo/foo.txt")
-                assertFileInProjectNotExists("build/js/packages/kotlin-js-browser-app/sync-hashes/foo/foo.txt.hash")
             }
         }
     }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/DefaultIncrementalSyncTask.kt

@@ -0,0 +1,95 @@
+package org.jetbrains.kotlin.gradle.targets.js.ir
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.CopySpec
+import org.gradle.api.file.FileSystemOperations
+import org.gradle.api.model.ObjectFactory
+import org.gradle.api.tasks.*
+import org.gradle.work.ChangeType
+import org.gradle.work.DisableCachingByDefault
+import org.gradle.work.InputChanges
+import org.jetbrains.kotlin.gradle.targets.js.internal.RewriteSourceMapFilterReader
+import org.jetbrains.kotlin.gradle.tasks.IncrementalSyncTask
+import java.io.File
+import javax.inject.Inject
+
+@DisableCachingByDefault
+abstract class DefaultIncrementalSyncTask : DefaultTask(), IncrementalSyncTask {
+
+    @get:Inject
+    abstract val fs: FileSystemOperations
+
+    @get:Inject
+    abstract val objectFactory: ObjectFactory
+
+    @TaskAction
+    fun doCopy(inputChanges: InputChanges) {
+        val destinationDir = destinationDirectory.get()
+        val commonAction: CopySpec.() -> Unit = {
+            into(destinationDir)
+            // Rewrite relative paths in sourcemaps in the target directory
+            eachFile {
+                if (it.name.endsWith(".js.map")) {
+                    it.filter(
+                        mapOf(
+                            RewriteSourceMapFilterReader::srcSourceRoot.name to it.file.parentFile,
+                            RewriteSourceMapFilterReader::targetSourceRoot.name to destinationDir
+                        ),
+                        RewriteSourceMapFilterReader::class.java
+                    )
+                }
+            }
+        }
+
+        val work = if (!inputChanges.isIncremental) {
+            fs.copy {
+                it.from(from)
+                it.commonAction()
+            }.didWork
+        } else {
+            val changedFiles = inputChanges.getFileChanges(from)
+
+            val modified = changedFiles
+                .filter {
+                    it.changeType == ChangeType.ADDED || it.changeType == ChangeType.MODIFIED
+                }
+                .map { it.file }
+                .toSet()
+
+            val forCopy = from.asFileTree
+                .matching { patternFilterable ->
+                    patternFilterable.exclude {
+                        it.file.isFile && it.file !in modified
+                    }
+                }
+
+            val nonRemovingFiles = mutableSetOf<File>()
+
+            from.asFileTree
+                .visit {
+                    nonRemovingFiles.add(it.relativePath.getFile(destinationDir))
+                }
+
+            val removingFiles = objectFactory.fileTree()
+                .from(destinationDir)
+                .also { fileTree ->
+                    fileTree.exclude {
+                        it.file.isFile && it.file in nonRemovingFiles
+                    }
+                }
+
+            val deleteWork = fs.delete {
+                it.delete(removingFiles)
+            }
+
+            val copyWork = fs.copy {
+                it.from(forCopy)
+                it.commonAction()
+            }
+
+            deleteWork.didWork || copyWork.didWork
+        }
+
+        didWork = work
+    }
+}

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/JsBinaries.kt

@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.gradle.targets.js.ir
 
 import org.gradle.api.Project
-import org.gradle.api.tasks.Copy
 import org.gradle.api.tasks.TaskProvider
 import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
 import org.jetbrains.kotlin.gradle.plugin.KotlinTarget
@@ -14,9 +13,9 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJsCompilation
 import org.jetbrains.kotlin.gradle.targets.js.dsl.Distribution
 import org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsBinaryMode
 import org.jetbrains.kotlin.gradle.targets.js.ir.KotlinJsBinaryContainer.Companion.generateBinaryName
-import org.jetbrains.kotlin.gradle.targets.js.subtargets.DefaultDistribution
 import org.jetbrains.kotlin.gradle.targets.js.subtargets.createDefaultDistribution
 import org.jetbrains.kotlin.gradle.targets.js.typescript.TypeScriptValidationTask
+import org.jetbrains.kotlin.gradle.tasks.IncrementalSyncTask
 import org.jetbrains.kotlin.gradle.tasks.withType
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
 
@@ -56,9 +55,9 @@ sealed class JsIrBinary(
 
     val validateGeneratedTsTaskName: String = validateTypeScriptTaskName()
 
-    val linkSyncTask: TaskProvider<Copy>
+    val linkSyncTask: TaskProvider<IncrementalSyncTask>
         get() = target.project.tasks
-            .withType<Copy>()
+            .withType<IncrementalSyncTask>()
             .named(linkSyncTaskName)
 
     private fun linkSyncTaskName(): String =

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinBrowserJsIr.kt

@@ -164,7 +164,7 @@ abstract class KotlinBrowserJsIr @Inject constructor(target: KotlinJsIrTarget) :
                     task.commonConfigure(
                         compilation = compilation,
                         mode = mode,
-                        inputFilesDirectory = binary.linkSyncTask.map { it.destinationDir },
+                        inputFilesDirectory = binary.linkSyncTask.flatMap { it.destinationDirectory },
                         entryModuleName = binary.linkTask.flatMap { it.compilerOptions.moduleName },
                         configurationActions = runTaskConfigurations,
                         nodeJs = nodeJs,
@@ -229,7 +229,7 @@ abstract class KotlinBrowserJsIr @Inject constructor(target: KotlinJsIrTarget) :
                     task.commonConfigure(
                         compilation = compilation,
                         mode = mode,
-                        inputFilesDirectory = binary.linkSyncTask.map { it.destinationDir },
+                        inputFilesDirectory = binary.linkSyncTask.flatMap { it.destinationDirectory },
                         entryModuleName = binary.linkTask.flatMap { it.compilerOptions.moduleName },
                         configurationActions = webpackTaskConfigurations,
                         nodeJs = nodeJs,

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinD8Ir.kt

@@ -37,8 +37,8 @@ abstract class KotlinD8Ir @Inject constructor(target: KotlinJsIrTarget) :
             inputFileProperty.fileProvider(
                 binary.linkSyncTask.flatMap { linkSyncTask ->
                     binary.linkTask.flatMap { linkTask ->
-                        linkTask.outputFileProperty.map {
+                        linkTask.outputFileProperty.map { file ->
-                            linkSyncTask.destinationDir.resolve(it.name)
+                            linkSyncTask.destinationDirectory.get().resolve(file.name)
                         }
                     }
                 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrSubTarget.kt

@@ -125,8 +125,8 @@ abstract class KotlinJsIrSubTarget(
             testJs.inputFileProperty.fileProvider(
                 binary.linkSyncTask.flatMap { linkSyncTask ->
                     binary.linkTask.flatMap { linkTask ->
-                        linkTask.outputFileProperty.map {
+                        linkTask.outputFileProperty.map { file ->
-                            linkSyncTask.destinationDir.resolve(it.name)
+                            linkSyncTask.destinationDirectory.get().resolve(file.name)
                         }
                     }
                 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrTarget.kt

@@ -131,25 +131,22 @@ constructor(
         }
     }
 
-    private fun registerCompileSync(binary: JsIrBinary): TaskProvider<SyncExecutableTask> {
+    private fun registerCompileSync(binary: JsIrBinary): TaskProvider<DefaultIncrementalSyncTask> {
         val compilation = binary.compilation
         val npmProject = compilation.npmProject
 
-        return project.registerTask<SyncExecutableTask>(
+        return project.registerTask<DefaultIncrementalSyncTask>(
             binary.linkSyncTaskName
         ) { task ->
-            task.from(
+            task.from.from(
                 binary.linkTask.flatMap { linkTask ->
                     linkTask.destinationDirectory.map { it.asFile }
                 }
             )
 
-            task.from(project.tasks.named(compilation.processResourcesTaskName))
+            task.from.from(project.tasks.named(compilation.processResourcesTaskName))
 
-            val hashDir = npmProject.dir.resolve("sync-hashes")
+            task.destinationDirectory.set(npmProject.dist)
-            task.hashDir.set(hashDir)
-
-            task.into(npmProject.dist)
         }
     }
 

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinNodeJsIr.kt

@@ -40,8 +40,8 @@ abstract class KotlinNodeJsIr @Inject constructor(target: KotlinJsIrTarget) :
             inputFileProperty.fileProvider(
                 binary.linkSyncTask.flatMap { linkSyncTask ->
                     binary.linkTask.flatMap { linkTask ->
-                        linkTask.outputFileProperty.map {
+                        linkTask.outputFileProperty.map { file ->
-                            linkSyncTask.destinationDir.resolve(it.name)
+                            linkSyncTask.destinationDirectory.get().resolve(file.name)
                         }
                     }
                 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/SyncExecutableTask.kt

@@ -1,92 +0,0 @@
-/*
- * 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.targets.js.ir
-
-import org.gradle.api.model.ObjectFactory
-import org.gradle.api.provider.Property
-import org.gradle.api.tasks.Copy
-import org.gradle.api.tasks.OutputDirectory
-import org.gradle.internal.hash.FileHasher
-import org.jetbrains.kotlin.gradle.targets.js.internal.RewriteSourceMapFilterReader
-import org.jetbrains.kotlin.gradle.targets.js.toHex
-import java.io.File
-import javax.inject.Inject
-
-abstract class SyncExecutableTask : Copy() {
-
-    @get:Inject
-    abstract val fileHasher: FileHasher
-
-    @get:Inject
-    abstract val objects: ObjectFactory
-
-    @get:OutputDirectory
-    abstract val hashDir: Property<File>
-
-    override fun copy() {
-        val actualFiles = mutableSetOf<File>()
-
-        val hashDirFile = hashDir.get()
-        eachFile {
-            actualFiles.add(it.relativeSourcePath.getFile(destinationDir))
-
-            val hashFile = hashDirFile.resolve(it.relativeSourcePath.pathString + ".$HASH_EXTENSION")
-
-            val currentHash = fileHasher.hash(it.file)
-            val currentHashHex = currentHash.toByteArray().toHex()
-
-            if (hashFile.exists()) {
-                val previousHash = hashFile.readText()
-
-                if (previousHash == currentHashHex) {
-                    it.exclude()
-                    return@eachFile
-                }
-            } else {
-                hashFile.parentFile.mkdirs()
-            }
-
-            hashFile.writeText(currentHashHex)
-        }
-
-        // Rewrite relative paths in sourcemaps in the target directory
-        eachFile {
-            if (it.name.endsWith(".js.map")) {
-                it.filter(
-                    mapOf(
-                        RewriteSourceMapFilterReader::srcSourceRoot.name to it.file.parentFile,
-                        RewriteSourceMapFilterReader::targetSourceRoot.name to destinationDir
-                    ),
-                    RewriteSourceMapFilterReader::class.java
-                )
-            }
-        }
-
-        super.copy()
-
-        objects.fileTree()
-            .from(hashDirFile)
-            .files
-            .forEach {
-                if (destinationDir.resolve(it.relativeTo(hashDirFile).path.removeSuffix(".$HASH_EXTENSION")) !in actualFiles) {
-                    it.delete()
-                }
-            }
-
-        objects.fileTree()
-            .from(destinationDir)
-            .files
-            .forEach {
-                if (it !in actualFiles) {
-                    it.delete()
-                }
-            }
-    }
-
-    companion object {
-        const val HASH_EXTENSION = "hash"
-    }
-}