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https://github.com/denoland/deno.git
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d47147fb6a
This commit moves "deno_std/node" in "ext/node" crate. The code is transpiled and snapshotted during the build process. During the first pass a minimal amount of work was done to create the snapshot, a lot of code in "ext/node" depends on presence of "Deno" global. This code will be gradually fixed in the follow up PRs to migrate it to import relevant APIs from "internal:" modules. Currently the code from snapshot is not used in any way, and all Node/npm compatibility still uses code from "https://deno.land/std/node" (or from the location specified by "DENO_NODE_COMPAT_URL"). This will also be handled in a follow up PRs. --------- Co-authored-by: crowlkats <crowlkats@toaxl.com> Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com> Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
108 lines
3.2 KiB
TypeScript
108 lines
3.2 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import {
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BinaryOptionsArgument,
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FileOptionsArgument,
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getEncoding,
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TextOptionsArgument,
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} from "internal:deno_node/polyfills/_fs/_fs_common.ts";
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import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
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import { fromFileUrl } from "internal:deno_node/polyfills/path.ts";
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import {
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BinaryEncodings,
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Encodings,
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TextEncodings,
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} from "internal:deno_node/polyfills/_utils.ts";
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import { promisify } from "internal:deno_node/polyfills/internal/util.mjs";
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function maybeDecode(data: Uint8Array, encoding: TextEncodings): string;
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function maybeDecode(
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data: Uint8Array,
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encoding: BinaryEncodings | null,
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): Buffer;
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function maybeDecode(
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data: Uint8Array,
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encoding: Encodings | null,
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): string | Buffer {
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const buffer = Buffer.from(data.buffer, data.byteOffset, data.byteLength);
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if (encoding && encoding !== "binary") return buffer.toString(encoding);
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return buffer;
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}
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type TextCallback = (err: Error | null, data?: string) => void;
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type BinaryCallback = (err: Error | null, data?: Buffer) => void;
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type GenericCallback = (err: Error | null, data?: string | Buffer) => void;
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type Callback = TextCallback | BinaryCallback | GenericCallback;
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export function readFile(
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path: string | URL,
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options: TextOptionsArgument,
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callback: TextCallback,
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): void;
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export function readFile(
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path: string | URL,
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options: BinaryOptionsArgument,
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callback: BinaryCallback,
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): void;
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export function readFile(
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path: string | URL,
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options: null | undefined | FileOptionsArgument,
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callback: BinaryCallback,
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): void;
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export function readFile(path: string | URL, callback: BinaryCallback): void;
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export function readFile(
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path: string | URL,
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optOrCallback?: FileOptionsArgument | Callback | null | undefined,
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callback?: Callback,
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) {
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path = path instanceof URL ? fromFileUrl(path) : path;
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let cb: Callback | undefined;
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if (typeof optOrCallback === "function") {
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cb = optOrCallback;
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} else {
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cb = callback;
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}
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const encoding = getEncoding(optOrCallback);
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const p = Deno.readFile(path);
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if (cb) {
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p.then((data: Uint8Array) => {
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if (encoding && encoding !== "binary") {
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const text = maybeDecode(data, encoding);
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return (cb as TextCallback)(null, text);
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}
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const buffer = maybeDecode(data, encoding);
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(cb as BinaryCallback)(null, buffer);
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}, (err) => cb && cb(err));
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}
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}
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export const readFilePromise = promisify(readFile) as (
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& ((path: string | URL, opt: TextOptionsArgument) => Promise<string>)
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& ((path: string | URL, opt?: BinaryOptionsArgument) => Promise<Buffer>)
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& ((path: string | URL, opt?: FileOptionsArgument) => Promise<Buffer>)
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);
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export function readFileSync(
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path: string | URL,
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opt: TextOptionsArgument,
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): string;
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export function readFileSync(
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path: string | URL,
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opt?: BinaryOptionsArgument,
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): Buffer;
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export function readFileSync(
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path: string | URL,
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opt?: FileOptionsArgument,
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): string | Buffer {
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path = path instanceof URL ? fromFileUrl(path) : path;
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const data = Deno.readFileSync(path);
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const encoding = getEncoding(opt);
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if (encoding && encoding !== "binary") {
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const text = maybeDecode(data, encoding);
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return text;
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}
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const buffer = maybeDecode(data, encoding);
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return buffer;
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}
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