Check for script file validity on cache changes, fixes #EA-90318, #EA-87672

compiler/frontend/src/org/jetbrains/kotlin/script/KotlinScriptExternalImportsProvider.kt

@@ -60,7 +60,7 @@ class KotlinScriptExternalImportsProvider(val project: Project, private val scri
         val uncached = hashSetOf<String>()
         files.forEach { file ->
             val path = getFilePath(file)
-            if (!cache.containsKey(path) && !cacheOfNulls.contains(path) && !uncached.contains(path)) {
+            if (isValidFile(file) && !cache.containsKey(path) && !cacheOfNulls.contains(path) && !uncached.contains(path)) {
                 val scriptDef = scriptDefinitionProvider.findScriptDefinition(file)
                 if (scriptDef != null) {
                     val deps = scriptDef.getDependenciesFor(file, project, null)
@@ -83,6 +83,14 @@ class KotlinScriptExternalImportsProvider(val project: Project, private val scri
     fun <TF: Any> updateExternalImportsCache(files: Iterable<TF>): Iterable<TF> = cacheLock.write {
         files.mapNotNull { file ->
             val path = getFilePath(file)
+            if (!isValidFile(file)) {
+                if (cache.remove(path) != null || cacheOfNulls.remove(path)) {
+                    log.info("[kts] removed deps for invalid file $path")
+                    file
+                } // cleared
+                else null // unknown
+            }
+            else {
                 val scriptDef = scriptDefinitionProvider.findScriptDefinition(file)
                 if (scriptDef != null) {
                     val oldDeps = cache[path]
@@ -113,6 +121,7 @@ class KotlinScriptExternalImportsProvider(val project: Project, private val scri
                 else null // not a script
             }
         }
+    }
 
     fun invalidateCaches() {
         cacheLock.write {

compiler/frontend/src/org/jetbrains/kotlin/script/scriptFileUtil.kt

@@ -35,6 +35,13 @@ fun <TF> getFilePath(file: TF): String = when (file) {
     else -> throw IllegalArgumentException("Unsupported file type $file")
 }
 
+fun <TF> isValidFile(file: TF): Boolean = when (file) {
+    is PsiFile -> file.isValid
+    is VirtualFile -> file.isValid
+    is File -> file.exists() && file.isFile
+    else -> throw IllegalArgumentException("Unsupported file type $file")
+}
+
 fun <TF> getFile(file: TF): File? = when (file) {
     is PsiFile -> file.originalFile.run { File(virtualFile?.path) }
     is VirtualFile -> File(file.path)