0
0
Fork 0
mirror of https://github.com/denoland/deno.git synced 2024-10-31 09:14:20 -04:00
denoland-deno/ext/node/polyfills/_fs/_fs_readFile.ts
Bartek Iwańczuk 72fe9bb470
refactor: rename InternalModuleLoader to ExtModuleLoader, use ext: scheme for snapshotted modules (#18041)
This commit renames "deno_core::InternalModuleLoader" to
"ExtModuleLoader" and changes the specifiers used by the 
modules loaded from this loader to "ext:".

"internal:" scheme was really ambiguous and it's more characters than
"ext:", which should result in slightly smaller snapshot size.

Closes https://github.com/denoland/deno/issues/18020
2023-03-08 12:44:54 +01:00

108 lines
3.2 KiB
TypeScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import {
BinaryOptionsArgument,
FileOptionsArgument,
getEncoding,
TextOptionsArgument,
} from "ext:deno_node/_fs/_fs_common.ts";
import { Buffer } from "ext:deno_node/buffer.ts";
import { fromFileUrl } from "ext:deno_node/path.ts";
import {
BinaryEncodings,
Encodings,
TextEncodings,
} from "ext:deno_node/_utils.ts";
import { promisify } from "ext:deno_node/internal/util.mjs";
function maybeDecode(data: Uint8Array, encoding: TextEncodings): string;
function maybeDecode(
data: Uint8Array,
encoding: BinaryEncodings | null,
): Buffer;
function maybeDecode(
data: Uint8Array,
encoding: Encodings | null,
): string | Buffer {
const buffer = Buffer.from(data.buffer, data.byteOffset, data.byteLength);
if (encoding && encoding !== "binary") return buffer.toString(encoding);
return buffer;
}
type TextCallback = (err: Error | null, data?: string) => void;
type BinaryCallback = (err: Error | null, data?: Buffer) => void;
type GenericCallback = (err: Error | null, data?: string | Buffer) => void;
type Callback = TextCallback | BinaryCallback | GenericCallback;
export function readFile(
path: string | URL,
options: TextOptionsArgument,
callback: TextCallback,
): void;
export function readFile(
path: string | URL,
options: BinaryOptionsArgument,
callback: BinaryCallback,
): void;
export function readFile(
path: string | URL,
options: null | undefined | FileOptionsArgument,
callback: BinaryCallback,
): void;
export function readFile(path: string | URL, callback: BinaryCallback): void;
export function readFile(
path: string | URL,
optOrCallback?: FileOptionsArgument | Callback | null | undefined,
callback?: Callback,
) {
path = path instanceof URL ? fromFileUrl(path) : path;
let cb: Callback | undefined;
if (typeof optOrCallback === "function") {
cb = optOrCallback;
} else {
cb = callback;
}
const encoding = getEncoding(optOrCallback);
const p = Deno.readFile(path);
if (cb) {
p.then((data: Uint8Array) => {
if (encoding && encoding !== "binary") {
const text = maybeDecode(data, encoding);
return (cb as TextCallback)(null, text);
}
const buffer = maybeDecode(data, encoding);
(cb as BinaryCallback)(null, buffer);
}, (err) => cb && cb(err));
}
}
export const readFilePromise = promisify(readFile) as (
& ((path: string | URL, opt: TextOptionsArgument) => Promise<string>)
& ((path: string | URL, opt?: BinaryOptionsArgument) => Promise<Buffer>)
& ((path: string | URL, opt?: FileOptionsArgument) => Promise<Buffer>)
);
export function readFileSync(
path: string | URL,
opt: TextOptionsArgument,
): string;
export function readFileSync(
path: string | URL,
opt?: BinaryOptionsArgument,
): Buffer;
export function readFileSync(
path: string | URL,
opt?: FileOptionsArgument,
): string | Buffer {
path = path instanceof URL ? fromFileUrl(path) : path;
const data = Deno.readFileSync(path);
const encoding = getEncoding(opt);
if (encoding && encoding !== "binary") {
const text = maybeDecode(data, encoding);
return text;
}
const buffer = maybeDecode(data, encoding);
return buffer;
}