add copyFile & copyFileSync to node/fs (denoland/deno#4726)

node/_fs/_fs_copy.ts

@@ -0,0 +1,32 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+import { CallbackWithError } from "./_fs_common.ts";
+
+export function copyFile(
+ source: string,
+ destination: string,
+ callback: CallbackWithError
+): void {
+ new Promise(async (resolve, reject) => {
+ try {
+ await Deno.copyFile(source, destination);
+ resolve();
+ } catch (err) {
+ reject(err);
+ }
+ })
+ .then(() => {
+ callback();
+ })
+ .catch((err) => {
+ callback(err);
+ });
+}
+
+export function copyFileSync(source: string, destination: string): void {
+ try {
+ Deno.copyFileSync(source, destination);
+ } catch (err) {
+ throw err;
+ }
+}

node/_fs/_fs_copy_test.ts

@@ -0,0 +1,33 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { copyFile, copyFileSync } from "./_fs_copy.ts";
+import { existsSync } from "./_fs_exists.ts";
+
+import { assert } from "../../testing/asserts.ts";
+const { test } = Deno;
+
+const destFile = "./destination.txt";
+
+test({
+ name: "[std/node/fs] copy file",
+ fn: async () => {
+ const srouceFile = Deno.makeTempFileSync();
+ const err = await new Promise((resolve) => {
+ copyFile(srouceFile, destFile, (err: Error | undefined) => resolve(err));
+ });
+ assert(!err);
+ assert(existsSync(destFile));
+ Deno.removeSync(srouceFile);
+ Deno.removeSync(destFile);
+ },
+});
+
+test({
+ name: "[std/node/fs] copy file sync",
+ fn: () => {
+ const srouceFile = Deno.makeTempFileSync();
+ copyFileSync(srouceFile, destFile);
+ assert(existsSync(destFile));
+ Deno.removeSync(srouceFile);
+ Deno.removeSync(destFile);
+ },
+});

node/fs.ts

@@ -10,6 +10,7 @@ import { readFile, readFileSync } from "./_fs/_fs_readFile.ts";
 import { readlink, readlinkSync } from "./_fs/_fs_readlink.ts";
 import { exists, existsSync } from "./_fs/_fs_exists.ts";
 import { mkdir, mkdirSync } from "./_fs/_fs_mkdir.ts";
+import { copyFile, copyFileSync } from "./_fs/_fs_copy.ts";
 
 export {
  access,
@@ -23,6 +24,8 @@ export {
  close,
  closeSync,
  constants,
+ copyFile,
+ copyFileSync,
  exists,
  existsSync,
  readFile,