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a21a5ad2fa
Resolves #1705 This PR adds the Deno APIs as a global namespace named `Deno`. For backwards compatibility, the ability to `import * from "deno"` is preserved. I have tried to convert every test and internal code the references the module to use the namespace instead, but because I didn't break compatibility I am not sure. On the REPL, `deno` no longer exists, replaced only with `Deno` to align with the regular runtime. The runtime type library includes both the namespace and module. This means it duplicates the whole type information. When we remove the functionality from the runtime, it will be a one line change to the library generator to remove the module definition from the type library. I marked a `TODO` in a couple places where to remove the `"deno"` module, but there are additional places I know I didn't mark.
71 lines
2.3 KiB
TypeScript
71 lines
2.3 KiB
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import * as msg from "gen/msg_generated";
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import * as flatbuffers from "./flatbuffers";
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import * as dispatch from "./dispatch";
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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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dispatch.sendSync(...req(filename, data, options));
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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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await dispatch.sendAsync(...req(filename, data, options));
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}
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function req(
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filename: string,
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data: Uint8Array,
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options: WriteFileOptions
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): [flatbuffers.Builder, msg.Any, flatbuffers.Offset, Uint8Array] {
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const builder = flatbuffers.createBuilder();
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const filename_ = builder.createString(filename);
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msg.WriteFile.startWriteFile(builder);
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msg.WriteFile.addFilename(builder, filename_);
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// Perm is not updated by default
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if (options.perm !== undefined && options.perm !== null) {
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msg.WriteFile.addUpdatePerm(builder, true);
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msg.WriteFile.addPerm(builder, options.perm!);
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} else {
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msg.WriteFile.addUpdatePerm(builder, false);
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msg.WriteFile.addPerm(builder, 0o666);
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}
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// Create is turned on by default
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if (options.create !== undefined) {
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msg.WriteFile.addIsCreate(builder, !!options.create);
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} else {
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msg.WriteFile.addIsCreate(builder, true);
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}
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msg.WriteFile.addIsAppend(builder, !!options.append);
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const inner = msg.WriteFile.endWriteFile(builder);
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return [builder, msg.Any.WriteFile, inner, data];
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}
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