[Gradle, JS] Abstractize GradleNodeModulesCache.kt

#KT-32466 fixed
#KT-36784 fixed
#KT-36864 fixed

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

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. 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.npm
+
+import org.gradle.api.Project
+import org.gradle.api.artifacts.ResolvedArtifact
+import org.gradle.api.artifacts.ResolvedDependency
+import org.jetbrains.kotlin.gradle.internal.ProcessedFilesCache
+import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootExtension
+import java.io.File
+
+/**
+ * Cache for storing already created [GradleNodeModule]s
+ */
+internal abstract class AbstractNodeModulesCache(val nodeJs: NodeJsRootExtension) : AutoCloseable {
+    companion object {
+        const val STATE_FILE_NAME = ".visited"
+    }
+
+    val project: Project get() = nodeJs.rootProject
+    internal val dir = nodeJs.nodeModulesGradleCacheDir
+    private val cache = ProcessedFilesCache(project, dir, STATE_FILE_NAME, "9")
+
+    @Synchronized
+    fun get(
+        dependency: ResolvedDependency,
+        artifact: ResolvedArtifact
+    ): GradleNodeModule? = cache.getOrCompute(artifact.file) {
+        buildImportedPackage(dependency, artifact)
+    }?.let {
+        GradleNodeModule(it)
+    }
+
+    abstract fun buildImportedPackage(
+        dependency: ResolvedDependency,
+        artifact: ResolvedArtifact
+    ): File?
+
+    @Synchronized
+    override fun close() {
+        cache.close()
+    }
+}

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

@@ -5,36 +5,16 @@
 
 package org.jetbrains.kotlin.gradle.targets.js.npm
 
-import org.gradle.api.Project
 import org.gradle.api.artifacts.ResolvedArtifact
 import org.gradle.api.artifacts.ResolvedDependency
-import org.jetbrains.kotlin.gradle.internal.ProcessedFilesCache
 import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootExtension
 import java.io.File
 
 /**
  * Cache for storing already created [GradleNodeModule]s
  */
-internal class GradleNodeModulesCache(val nodeJs: NodeJsRootExtension) : AutoCloseable {
-    companion object {
-        const val STATE_FILE_NAME = ".visited"
-    }
-
-    val project: Project get() = nodeJs.rootProject
-    internal val dir = nodeJs.nodeModulesGradleCacheDir
-    private val cache = ProcessedFilesCache(project, dir, STATE_FILE_NAME, "9")
-
-    @Synchronized
-    fun get(
-        dependency: ResolvedDependency,
-        artifact: ResolvedArtifact
-    ): GradleNodeModule? = cache.getOrCompute(artifact.file) {
-        buildImportedPackage(dependency, artifact)
-    }?.let {
-        GradleNodeModule(it)
-    }
-
-    private fun buildImportedPackage(
+internal class GradleNodeModulesCache(nodeJs: NodeJsRootExtension) : AbstractNodeModulesCache(nodeJs) {
+    override fun buildImportedPackage(
         dependency: ResolvedDependency,
         artifact: ResolvedArtifact
     ): File? {
@@ -42,9 +22,4 @@ internal class GradleNodeModulesCache(val nodeJs: NodeJsRootExtension) : AutoClo
         module.visitArtifacts()
         return module.rebuild()
     }
-
-    @Synchronized
-    override fun close() {
-        cache.close()
-    }
 }