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denoland-deno/js/copy_file.ts
2019-01-02 02:37:08 +01:00

47 lines
1.6 KiB
TypeScript

// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import * as msg from "gen/msg_generated";
import * as flatbuffers from "./flatbuffers";
import * as dispatch from "./dispatch";
/** Copies the contents of a file to another by name synchronously.
* Creates a new file if target does not exists, and if target exists,
* overwrites original content of the target file.
*
* It would also copy the permission of the original file
* to the destination.
*
* import { copyFileSync } from "deno";
* copyFileSync("from.txt", "to.txt");
*/
export function copyFileSync(from: string, to: string): void {
dispatch.sendSync(...req(from, to));
}
/** Copies the contents of a file to another by name.
*
* Creates a new file if target does not exists, and if target exists,
* overwrites original content of the target file.
*
* It would also copy the permission of the original file
* to the destination.
*
* import { copyFile } from "deno";
* await copyFile("from.txt", "to.txt");
*/
export async function copyFile(from: string, to: string): Promise<void> {
await dispatch.sendAsync(...req(from, to));
}
function req(
from: string,
to: string
): [flatbuffers.Builder, msg.Any, flatbuffers.Offset] {
const builder = flatbuffers.createBuilder();
const from_ = builder.createString(from);
const to_ = builder.createString(to);
msg.CopyFile.startCopyFile(builder);
msg.CopyFile.addFrom(builder, from_);
msg.CopyFile.addTo(builder, to_);
const inner = msg.CopyFile.endCopyFile(builder);
return [builder, msg.Any.CopyFile, inner];
}