First commit.

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

client/node_modules/langium/lib/workspace/file-system-provider.d.ts

@@ -0,0 +1,85 @@
+/******************************************************************************
+ * 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.
+ ******************************************************************************/
+import type { URI } from '../utils/uri-utils.js';
+export interface FileSystemNode {
+    readonly isFile: boolean;
+    readonly isDirectory: boolean;
+    readonly uri: URI;
+}
+export type FileSystemFilter = (node: FileSystemNode) => boolean;
+/**
+ * Provides methods to interact with an abstract file system. The default implementation is based on the node.js `fs` API.
+ */
+export interface FileSystemProvider {
+    /**
+     * Gets the status of a file or directory.
+     * The status includes meta data such as whether the node is a file or directory.
+     * @param uri The URI of the file or directory.
+     */
+    stat(uri: URI): Promise<FileSystemNode>;
+    /**
+     * Gets the status of a file or directory synchronously.
+     * The status includes meta data such as whether the node is a file or directory.
+     * @param uri The URI of the file or directory.
+     */
+    statSync(uri: URI): FileSystemNode;
+    /**
+     * Checks if a file exists at the specified URI.
+     * @returns `true` if a file exists at the specified URI, `false` otherwise.
+     */
+    exists(uri: URI): Promise<boolean>;
+    /**
+     * Checks if a file exists at the specified URI synchronously.
+     * @returns `true` if a file exists at the specified URI, `false` otherwise.
+     */
+    existsSync(uri: URI): boolean;
+    /**
+     * Reads a binary file asynchronously from a given URI.
+     * @returns The binary content of the file with the specified URI.
+     */
+    readBinary(uri: URI): Promise<Uint8Array>;
+    /**
+     * Reads a binary file synchronously from a given URI.
+     * @returns The binary content of the file with the specified URI.
+     */
+    readBinarySync(uri: URI): Uint8Array;
+    /**
+     * Reads a document asynchronously from a given URI.
+     * @returns The string content of the file with the specified URI.
+     */
+    readFile(uri: URI): Promise<string>;
+    /**
+     * Reads a document synchronously from a given URI.
+     * @returns The string content of the file with the specified
+     */
+    readFileSync(uri: URI): string;
+    /**
+     * Reads the directory information for the given URI.
+     * @returns The list of file system entries that are contained within the specified directory.
+     */
+    readDirectory(uri: URI): Promise<FileSystemNode[]>;
+    /**
+     * Reads the directory information for the given URI synchronously.
+     * @returns The list of file system entries that are contained within the specified directory.
+     */
+    readDirectorySync(uri: URI): FileSystemNode[];
+}
+export declare class EmptyFileSystemProvider implements FileSystemProvider {
+    stat(_uri: URI): Promise<FileSystemNode>;
+    statSync(_uri: URI): FileSystemNode;
+    exists(): Promise<boolean>;
+    existsSync(): boolean;
+    readBinary(): Promise<Uint8Array>;
+    readBinarySync(): Uint8Array;
+    readFile(): Promise<string>;
+    readFileSync(): string;
+    readDirectory(): Promise<FileSystemNode[]>;
+    readDirectorySync(): FileSystemNode[];
+}
+export declare const EmptyFileSystem: {
+    fileSystemProvider: () => EmptyFileSystemProvider;
+};
+//# sourceMappingURL=file-system-provider.d.ts.map