Add an ability to provide own handler for errors inside KotlinJavascriptMetadataUtils.loadMetadata

Use a logger to handle errors inside loadMetadata when it's used from IDE (JsResolverForModuleFactory).

#EA-218905

idea/idea-analysis/src/org/jetbrains/kotlin/caches/resolve/JsResolverForModuleFactory.kt

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.caches.resolve
 
+import com.intellij.openapi.diagnostic.Logger
 import org.jetbrains.kotlin.analyzer.*
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.container.StorageComponentContainer
@@ -26,6 +27,8 @@ import org.jetbrains.kotlin.serialization.js.KotlinJavascriptSerializationUtil
 import org.jetbrains.kotlin.serialization.js.createKotlinJavascriptPackageFragmentProvider
 import org.jetbrains.kotlin.utils.KotlinJavascriptMetadataUtils
 
+private val LOG = Logger.getInstance(JsResolverForModuleFactory::class.java)
+
 class JsResolverForModuleFactory(
     private val targetEnvironment: TargetEnvironment
 ) : ResolverForModuleFactory() {
@@ -85,7 +88,7 @@ internal fun <M : ModuleInfo> createPackageFragmentProvider(
     }
     is LibraryModuleInfo -> {
         moduleInfo.getLibraryRoots()
-            .flatMap { KotlinJavascriptMetadataUtils.loadMetadata(it) }
+            .flatMap { KotlinJavascriptMetadataUtils.loadMetadata(it) { msg -> LOG.error(msg) } }
             .filter { it.version.isCompatible() }
             .map { metadata ->
                 val (header, packageFragmentProtos) =

js/js.config/src/org/jetbrains/kotlin/utils/KotlinJavascriptMetadataUtils.kt

@@ -65,8 +65,11 @@ object KotlinJavascriptMetadataUtils {
         "\"${Base64.getEncoder().encodeToString(content)}\");\n"
 
     @JvmStatic
-    fun loadMetadata(file: File): List<KotlinJavascriptMetadata> {
+    fun loadMetadata(file: File, onError: (message: String) -> Unit = ::error): List<KotlinJavascriptMetadata> {
-        assert(file.exists()) { "Library $file not found" }
+        if (!file.exists()) {
+            onError("Library $file not found")
+            return emptyList()
+        }
         val metadataList = arrayListOf<KotlinJavascriptMetadata>()
         JsLibraryUtils.traverseJsLibrary(file) { library ->
             parseMetadata(library.content, metadataList)
@@ -76,7 +79,7 @@ object KotlinJavascriptMetadataUtils {
     }
 
     @JvmStatic
-    fun loadMetadata(path: String): List<KotlinJavascriptMetadata> = loadMetadata(File(path))
+    fun loadMetadata(path: String, onError: (message: String) -> Unit): List<KotlinJavascriptMetadata> = loadMetadata(File(path), onError)
 
     @JvmStatic
     fun parseMetadata(text: CharSequence, metadataList: MutableList<KotlinJavascriptMetadata>) {

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicBoxTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2020 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.
  */
 
@@ -881,7 +881,7 @@ abstract class BasicBoxTest(
 
     companion object {
         val METADATA_CACHE = (JsConfig.JS_STDLIB + JsConfig.JS_KOTLIN_TEST).flatMap { path ->
-            KotlinJavascriptMetadataUtils.loadMetadata(path).map { metadata ->
+            KotlinJavascriptMetadataUtils.loadMetadata(path, ::error).map { metadata ->
                 val parts = KotlinJavascriptSerializationUtil.readModuleAsProto(metadata.body, metadata.version)
                 JsModuleDescriptor(metadata.moduleName, parts.kind, parts.importedModules, parts)
             }