diff --git a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/KotlinScriptConfigurationManager.kt b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/KotlinScriptConfigurationManager.kt
index 633a2f0db09..e63f76b5a3c 100644
--- a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/KotlinScriptConfigurationManager.kt
+++ b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/KotlinScriptConfigurationManager.kt
@@ -73,11 +73,11 @@ class KotlinScriptConfigurationManager(
     private val cacheLock = ReentrantReadWriteLock()
 
     private val allScriptsClasspathCache = ClearableLazyValue(cacheLock) {
-        scriptExternalImportsProvider.getKnownCombinedClasspath().distinct().mapNotNull { it.classpathEntryToVfs() }
+        toVfsRoots(scriptExternalImportsProvider.getKnownCombinedClasspath().distinct())
     }
 
     private val allLibrarySourcesCache = ClearableLazyValue(cacheLock) {
-        scriptExternalImportsProvider.getKnownSourceRoots().distinct().mapNotNull { it.classpathEntryToVfs() }
+        toVfsRoots(scriptExternalImportsProvider.getKnownSourceRoots().distinct())
     }
 
     private fun notifyRootsChanged() {
@@ -86,24 +86,14 @@ class KotlinScriptConfigurationManager(
         }
     }
 
-    fun getScriptClasspath(file: VirtualFile): List<VirtualFile> =
-            scriptExternalImportsProvider.getExternalImports(file)?.classpath?.mapNotNull { it.classpathEntryToVfs() } ?: emptyList()
+    fun getScriptClasspath(file: VirtualFile): List<VirtualFile> = toVfsRoots(
+            scriptExternalImportsProvider.getExternalImports(file)?.classpath ?: emptyList()
+    )
 
     fun getAllScriptsClasspath(): List<VirtualFile> = allScriptsClasspathCache.get()
 
     fun getAllLibrarySources(): List<VirtualFile> = allLibrarySourcesCache.get()
 
-    private fun File.classpathEntryToVfs(): VirtualFile? {
-        val res = when {
-            !exists() -> null
-            isDirectory -> StandardFileSystems.local()?.findFileByPath(this.canonicalPath) ?: null
-            isFile -> StandardFileSystems.jar()?.findFileByPath(this.canonicalPath + URLUtil.JAR_SEPARATOR) ?: null
-            else -> null
-        }
-        // TODO: report this somewhere, but do not throw: assert(res != null, { "Invalid classpath entry '$this': exists: ${exists()}, is directory: $isDirectory, is file: $isFile" })
-        return res
-    }
-
     fun getAllScriptsClasspathScope() = NonClasspathDirectoriesScope(getAllScriptsClasspath())
 
     fun getAllLibrarySourcesScope() = NonClasspathDirectoriesScope(getAllLibrarySources())
@@ -145,6 +135,21 @@ class KotlinScriptConfigurationManager(
         @JvmStatic
         fun getInstance(project: Project): KotlinScriptConfigurationManager =
                 ServiceManager.getService(project, KotlinScriptConfigurationManager::class.java)
+
+        fun toVfsRoots(roots: Iterable<File>): List<VirtualFile> {
+            return roots.mapNotNull { it.classpathEntryToVfs() }
+        }
+
+        private fun File.classpathEntryToVfs(): VirtualFile? {
+            val res = when {
+                !exists() -> null
+                isDirectory -> StandardFileSystems.local()?.findFileByPath(this.canonicalPath) ?: null
+                isFile -> StandardFileSystems.jar()?.findFileByPath(this.canonicalPath + URLUtil.JAR_SEPARATOR) ?: null
+                else -> null
+            }
+            // TODO: report this somewhere, but do not throw: assert(res != null, { "Invalid classpath entry '$this': exists: ${exists()}, is directory: $isDirectory, is file: $isFile" })
+            return res
+        }
     }
 }