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std/node/_fs/_fs_readdir.ts

Deno standard library
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { asyncIterableToCallback } from "./_fs_watch.ts";import Dirent from "./_fs_dirent.ts";import { denoErrorToNodeError } from "../internal/errors.ts";import { getValidatedPath } from "../internal/fs/utils.mjs";import { Buffer } from "../buffer.ts";
function toDirent(val: Deno.DirEntry): Dirent { return new Dirent(val);}
type readDirOptions = { encoding?: string; withFileTypes?: boolean;};
type readDirCallback = (err: Error | null, files: string[]) => void;
type readDirCallbackDirent = (err: Error | null, files: Dirent[]) => void;
type readDirBoth = ( ...args: [Error] | [null, string[] | Dirent[] | Array<string | Dirent>]) => void;
export function readdir( path: string | Buffer | URL, options: { withFileTypes?: false; encoding?: string }, callback: readDirCallback,): void;export function readdir( path: string | Buffer | URL, options: { withFileTypes: true; encoding?: string }, callback: readDirCallbackDirent,): void;export function readdir(path: string | URL, callback: readDirCallback): void;export function readdir( path: string | Buffer | URL, optionsOrCallback: readDirOptions | readDirCallback | readDirCallbackDirent, maybeCallback?: readDirCallback | readDirCallbackDirent,) { const callback = (typeof optionsOrCallback === "function" ? optionsOrCallback : maybeCallback) as readDirBoth | undefined; const options = typeof optionsOrCallback === "object" ? optionsOrCallback : null; const result: Array<string | Dirent> = []; path = getValidatedPath(path);
if (!callback) throw new Error("No callback function supplied");
if (options?.encoding) { try { new TextDecoder(options.encoding); } catch { throw new Error( `TypeError [ERR_INVALID_OPT_VALUE_ENCODING]: The value "${options.encoding}" is invalid for option "encoding"`, ); } }
try { asyncIterableToCallback(Deno.readDir(path.toString()), (val, done) => { if (typeof path !== "string") return; if (done) { callback(null, result); return; } if (options?.withFileTypes) { result.push(toDirent(val)); } else result.push(decode(val.name)); }, (e) => { callback(denoErrorToNodeError(e as Error, { syscall: "readdir" })); }); } catch (e) { callback(denoErrorToNodeError(e as Error, { syscall: "readdir" })); }}
function decode(str: string, encoding?: string): string { if (!encoding) return str; else { const decoder = new TextDecoder(encoding); const encoder = new TextEncoder(); return decoder.decode(encoder.encode(str)); }}
export function readdirSync( path: string | Buffer | URL, options: { withFileTypes: true; encoding?: string },): Dirent[];export function readdirSync( path: string | Buffer | URL, options?: { withFileTypes?: false; encoding?: string },): string[];export function readdirSync( path: string | Buffer | URL, options?: readDirOptions,): Array<string | Dirent> { const result = []; path = getValidatedPath(path);
if (options?.encoding) { try { new TextDecoder(options.encoding); } catch { throw new Error( `TypeError [ERR_INVALID_OPT_VALUE_ENCODING]: The value "${options.encoding}" is invalid for option "encoding"`, ); } }
try { for (const file of Deno.readDirSync(path.toString())) { if (options?.withFileTypes) { result.push(toDirent(file)); } else result.push(decode(file.name)); } } catch (e) { throw denoErrorToNodeError(e as Error, { syscall: "readdir" }); } return result;}