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denoland-deno/js/read_file.ts
Ryan Dahl d43b43ca78
Refactor snapshot build (#2825)
Instead of using core/snapshot_creator.rs, instead two crates are
introduced which allow building the snapshot during build.rs.

Rollup is removed and replaced with our own bundler. This removes
the Node build dependency. Modules in //js now use Deno-style imports
with file extensions, rather than Node style extensionless imports.

This improves incremental build time when changes are made to //js files
by about 40 seconds.
2019-09-02 17:07:11 -04:00

29 lines
939 B
TypeScript

// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { open, openSync } from "./files.ts";
import { readAll, readAllSync } from "./buffer.ts";
/** Read the entire contents of a file synchronously.
*
* const decoder = new TextDecoder("utf-8");
* const data = Deno.readFileSync("hello.txt");
* console.log(decoder.decode(data));
*/
export function readFileSync(filename: string): Uint8Array {
const file = openSync(filename);
const contents = readAllSync(file);
file.close();
return contents;
}
/** Read the entire contents of a file.
*
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello.txt");
* console.log(decoder.decode(data));
*/
export async function readFile(filename: string): Promise<Uint8Array> {
const file = await open(filename);
const contents = await readAll(file);
file.close();
return contents;
}