From df062d2c788fd76546d59c67452d8d0fe569c533 Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Fri, 5 Jan 2024 18:28:33 +0530
Subject: fix(ext/node): add fs.cp, fs.cpSync, promises.cp (#21745)

Fixes https://github.com/denoland/deno/issues/20803
Fixes https://github.com/denoland/deno/issues/21723

Performance: copying a 48GiB rust `target` folder (recursive)
| Platform  | `deno` | `node v21.5` | Improvement |
| -------- | ------- | ------- | ------- |
| macOS (APFS) |   3.1secs  |  127.99 secs |  **42x** |
| Windows | 18.3secs | 67.2secs |  **3.8x** |

Copying files with varying sizes:


![image](https://github.com/denoland/deno/assets/34997667/58932652-6f7a-47f5-8504-896dc9ab4ddc)
---
 ext/node/polyfills/_fs/_fs_cp.js | 41 ++++++++++++++++++++++++++++++++++++++++
 ext/node/polyfills/fs.ts         |  6 ++++++
 2 files changed, 47 insertions(+)
 create mode 100644 ext/node/polyfills/_fs/_fs_cp.js

(limited to 'ext/node/polyfills')

diff --git a/ext/node/polyfills/_fs/_fs_cp.js b/ext/node/polyfills/_fs/_fs_cp.js
new file mode 100644
index 000000000..dbe327974
--- /dev/null
+++ b/ext/node/polyfills/_fs/_fs_cp.js
@@ -0,0 +1,41 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+// deno-lint-ignore-file prefer-primordials
+
+import {
+  getValidatedPath,
+  validateCpOptions,
+} from "ext:deno_node/internal/fs/utils.mjs";
+import { promisify } from "ext:deno_node/internal/util.mjs";
+
+const core = globalThis.__bootstrap.core;
+const ops = core.ops;
+const { op_node_cp } = core.ensureFastOps();
+
+export function cpSync(src, dest, options) {
+  validateCpOptions(options);
+  const srcPath = getValidatedPath(src, "src");
+  const destPath = getValidatedPath(dest, "dest");
+
+  ops.op_node_cp_sync(srcPath, destPath);
+}
+
+export function cp(src, dest, options, callback) {
+  if (typeof options === "function") {
+    callback = options;
+    options = {};
+  }
+  validateCpOptions(options);
+  const srcPath = getValidatedPath(src, "src");
+  const destPath = getValidatedPath(dest, "dest");
+
+  op_node_cp(
+    srcPath,
+    destPath,
+  ).then(
+    (res) => callback(null, res),
+    (err) => callback(err, null),
+  );
+}
+
+export const cpPromise = promisify(cp);
diff --git a/ext/node/polyfills/fs.ts b/ext/node/polyfills/fs.ts
index 881f0c139..01ac9912e 100644
--- a/ext/node/polyfills/fs.ts
+++ b/ext/node/polyfills/fs.ts
@@ -18,6 +18,7 @@ import {
   copyFilePromise,
   copyFileSync,
 } from "ext:deno_node/_fs/_fs_copy.ts";
+import { cp, cpPromise, cpSync } from "ext:deno_node/_fs/_fs_cp.js";
 import Dir from "ext:deno_node/_fs/_fs_dir.ts";
 import Dirent from "ext:deno_node/_fs/_fs_dirent.ts";
 import { exists, existsSync } from "ext:deno_node/_fs/_fs_exists.ts";
@@ -137,6 +138,7 @@ const {
 const promises = {
   access: accessPromise,
   copyFile: copyFilePromise,
+  cp: cpPromise,
   open: openPromise,
   opendir: opendirPromise,
   rename: renamePromise,
@@ -179,6 +181,8 @@ export default {
   constants,
   copyFile,
   copyFileSync,
+  cp,
+  cpSync,
   createReadStream,
   createWriteStream,
   Dir,
@@ -280,6 +284,8 @@ export {
   constants,
   copyFile,
   copyFileSync,
+  cp,
+  cpSync,
   createReadStream,
   createWriteStream,
   Dir,
-- 
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