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d43b43ca78
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.
76 lines
2 KiB
TypeScript
76 lines
2 KiB
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { stat, statSync } from "./stat.ts";
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import { open, openSync } from "./files.ts";
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import { chmod, chmodSync } from "./chmod.ts";
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import { writeAll, writeAllSync } from "./buffer.ts";
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/** Options for writing to a file.
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* `perm` would change the file's permission if set.
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* `create` decides if the file should be created if not exists (default: true)
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* `append` decides if the file should be appended (default: false)
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*/
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export interface WriteFileOptions {
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perm?: number;
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create?: boolean;
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append?: boolean;
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}
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/** Write a new file, with given filename and data synchronously.
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*
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* const encoder = new TextEncoder();
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* const data = encoder.encode("Hello world\n");
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* Deno.writeFileSync("hello.txt", data);
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*/
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export function writeFileSync(
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filename: string,
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data: Uint8Array,
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options: WriteFileOptions = {}
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): void {
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if (options.create !== undefined) {
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const create = !!options.create;
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if (!create) {
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// verify that file exists
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statSync(filename);
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}
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}
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const openMode = !!options.append ? "a" : "w";
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const file = openSync(filename, openMode);
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if (options.perm !== undefined && options.perm !== null) {
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chmodSync(filename, options.perm);
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}
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writeAllSync(file, data);
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file.close();
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}
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/** Write a new file, with given filename and data.
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*
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* const encoder = new TextEncoder();
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* const data = encoder.encode("Hello world\n");
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* await Deno.writeFile("hello.txt", data);
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*/
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export async function writeFile(
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filename: string,
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data: Uint8Array,
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options: WriteFileOptions = {}
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): Promise<void> {
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if (options.create !== undefined) {
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const create = !!options.create;
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if (!create) {
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// verify that file exists
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await stat(filename);
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}
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}
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const openMode = !!options.append ? "a" : "w";
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const file = await open(filename, openMode);
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if (options.perm !== undefined && options.perm !== null) {
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await chmod(filename, options.perm);
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}
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await writeAll(file, data);
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file.close();
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}
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