First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/langium/lib/workspace/file-system-provider.js

@@ -0,0 +1,41 @@
+/******************************************************************************
+ * Copyright 2022 TypeFox GmbH
+ * This program and the accompanying materials are made available under the
+ * terms of the MIT License, which is available in the project root.
+ ******************************************************************************/
+export class EmptyFileSystemProvider {
+    stat(_uri) {
+        throw new Error('No file system is available.');
+    }
+    statSync(_uri) {
+        throw new Error('No file system is available.');
+    }
+    async exists() {
+        return false;
+    }
+    existsSync() {
+        return false;
+    }
+    readBinary() {
+        throw new Error('No file system is available.');
+    }
+    readBinarySync() {
+        throw new Error('No file system is available.');
+    }
+    readFile() {
+        throw new Error('No file system is available.');
+    }
+    readFileSync() {
+        throw new Error('No file system is available.');
+    }
+    async readDirectory() {
+        return [];
+    }
+    readDirectorySync() {
+        return [];
+    }
+}
+export const EmptyFileSystem = {
+    fileSystemProvider: () => new EmptyFileSystemProvider()
+};
+//# sourceMappingURL=file-system-provider.js.map