[Gradle, JS] Up-to-date checks for Node js and yarn

^KT-47845 fixed

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

@@ -10,6 +10,7 @@ import com.google.gson.stream.JsonReader
 import com.google.gson.stream.JsonToken
 import com.google.gson.stream.JsonWriter
 import org.gradle.internal.hash.FileHasher
+import org.jetbrains.kotlin.gradle.targets.js.toHex
 import java.io.File
 
 /**
@@ -92,17 +93,6 @@ internal open class ProcessedFilesCache(
         endObject()
     }
 
-    fun ByteArray.toHex(): String {
-        val result = CharArray(size * 2) { ' ' }
-        var i = 0
-        forEach {
-            val n = it.toInt()
-            result[i++] = Character.forDigit(n shr 4 and 0xF, 16)
-            result[i++] = Character.forDigit(n and 0xF, 16)
-        }
-        return String(result)
-    }
-
     private fun decodeHexString(hexString: String): ByteArray {
         check(hexString.length % 2 == 0)
         val bytes = ByteArray(hexString.length / 2)

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/nodejs/NodeJsSetupTask.kt

@@ -7,6 +7,7 @@ import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.*
 import org.jetbrains.kotlin.gradle.logging.kotlinInfo
 import org.jetbrains.kotlin.gradle.plugin.statistics.KotlinBuildStatsService
+import org.jetbrains.kotlin.gradle.targets.js.calculateDirHash
 import org.jetbrains.kotlin.gradle.utils.ArchiveOperationsCompat
 import org.jetbrains.kotlin.statistics.metrics.NumericalMetrics
 import java.io.File
@@ -36,6 +37,9 @@ abstract class NodeJsSetupTask : DefaultTask() {
     val destination: File
         @OutputDirectory get() = env.nodeDir
 
+    val destinationHashFile: File
+        @OutputFile get() = destination.parentFile.resolve("${destination.name}.hash")
+
     @Transient
     @get:Internal
     internal lateinit var configuration: Provider<Configuration>
@@ -78,11 +82,29 @@ abstract class NodeJsSetupTask : DefaultTask() {
     fun exec() {
         logger.kotlinInfo("Using node distribution from '$nodeJsDist'")
 
+        val upToDate = destinationHashFile.let { file ->
+            if (file.exists()) {
+                file.useLines {
+                    it.single() == calculateDirHash(destination)
+                }
+            } else false
+        }
+
+        if (upToDate) return
+
+        if (destination.isDirectory) {
+            destination.deleteRecursively()
+        }
+
         unpackNodeArchive(nodeJsDist, destination.parentFile) // parent because archive contains name already
 
         if (!env.isWindows) {
             File(env.nodeExecutable).setExecutable(true)
         }
+
+        destinationHashFile.writeText(
+            calculateDirHash(destination)!!
+        )
     }
 
     private fun unpackNodeArchive(archive: File, destination: File) {

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/utils.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.gradle.targets.js
 
 import org.jetbrains.kotlin.gradle.utils.appendLine
 import java.io.File
+import java.security.MessageDigest
 
 fun Appendable.appendConfigsFromDir(confDir: File) {
     val files = confDir.listFiles() ?: return
@@ -23,6 +24,34 @@ fun Appendable.appendConfigsFromDir(confDir: File) {
         }
 }
 
+fun ByteArray.toHex(): String {
+    val result = CharArray(size * 2) { ' ' }
+    var i = 0
+    forEach {
+        val n = it.toInt()
+        result[i++] = Character.forDigit(n shr 4 and 0xF, 16)
+        result[i++] = Character.forDigit(n and 0xF, 16)
+    }
+    return String(result)
+}
+
+fun calculateDirHash(dir: File): String? {
+    if (!dir.isDirectory) return null
+    val md = MessageDigest.getInstance("MD5")
+    dir.walk()
+        .forEach { file ->
+            md.update(file.absolutePath.toByteArray())
+            if (file.isFile) {
+                file.inputStream().use {
+                    md.update(it.readBytes())
+                }
+            }
+        }
+
+    val digest = md.digest()
+
+    return digest.toHex()
+}
 
 const val JS = "js"
 const val JS_MAP = "js.map"

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/yarn/YarnSetupTask.kt

@@ -12,6 +12,7 @@ import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.*
 import org.jetbrains.kotlin.gradle.logging.kotlinInfo
 import org.jetbrains.kotlin.gradle.plugin.statistics.KotlinBuildStatsService
+import org.jetbrains.kotlin.gradle.targets.js.calculateDirHash
 import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootPlugin
 import org.jetbrains.kotlin.gradle.utils.ArchiveOperationsCompat
 import org.jetbrains.kotlin.statistics.metrics.NumericalMetrics
@@ -41,6 +42,9 @@ open class YarnSetupTask : DefaultTask() {
     val destination: File
         @OutputDirectory get() = env.home
 
+    val destinationHashFile: File
+        @OutputFile get() = destination.parentFile.resolve("${destination.name}.hash")
+
     init {
         group = NodeJsRootPlugin.TASKS_GROUP_NAME
         description = "Download and install a local yarn version"
@@ -89,7 +93,25 @@ open class YarnSetupTask : DefaultTask() {
     fun setup() {
         logger.kotlinInfo("Using yarn distribution from '$yarnDist'")
 
+        val upToDate = destinationHashFile.let { file ->
+            if (file.exists()) {
+                file.useLines {
+                    it.single() == calculateDirHash(destination)
+                }
+            } else false
+        }
+
+        if (upToDate) return
+
+        if (destination.isDirectory) {
+            destination.deleteRecursively()
+        }
+
         extract(yarnDist, destination.parentFile) // parent because archive contains name already
+
+        destinationHashFile.writeText(
+            calculateDirHash(destination)!!
+        )
     }
 
     private fun extract(archive: File, destination: File) {