From 5b46f39db6fadb9169b88faedadb8472f748161b Mon Sep 17 00:00:00 2001
From: SukkaW <isukkaw@gmail.com>
Date: Sun, 22 Oct 2023 22:35:16 +0800
Subject: [PATCH] feat: support `mode`

---
 README.md    | 12 +++++++++++-
 src/index.ts |  5 ++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index d4c3402..d9e4496 100644
--- a/README.md
+++ b/README.md
@@ -40,9 +40,10 @@ import { copy } from 'rcpy'; // "copy" is an alias of "rcpy"
 - `option`: `RcpyOption` optional.
   - `dereference`: `boolean` optional. whether to dereference symbolic links, default to `false`.
   - `force`: `boolean` optional. whether to overwrite existing file/directory, default to `true`. Note that the copy operation will silently fail if you set this to false and the destination exists. Use the `errorOnExist` option to change this behavior.
-  - `overwrite`: `boolean` optional. The alias of `force`, serves as a compatibility option for `fs-extra`.
+  - `overwrite`: `boolean` optional. Deprecated, now is the alias of `force`. Serves as a compatibility option for `fs-extra`.
   - `errorOnExist`: `boolean` optional. whether to throw an error if `dest` already exists, default to `false`.
   - `filter`: `(src: string, dest: string) => boolean | Promise<boolean>` optional. filter copied files/directories, return `true` to copy, `false` to skip.
+  - `mode`: `number` optional. modifiers for copy operation, default to `0`. See `mode` flag of [`fs.copyFile()`](https://nodejs.org/api/fs.html#fscopyfilesrc-dest-mode-callback)
   - `preserveTimestamps`: `boolean` optional. whether to preserve file timestamps, default to `false`, where the behavior is OS-dependent.
   - `concurrency`: `number` optional. the number of concurrent copy operations, default to `32`.
 
@@ -53,6 +54,15 @@ import { copy } from 'rcpy'; // "copy" is an alias of "rcpy"
 - Asynchronous and Promise-based API only. No synchronous API, no Node.js callback style API.
   - Use `require('util').callbackify` to convert `rcpy` to Node.js callback style API.P
 
+## Differences between `rcpy` and Node.js `fs.cp()`
+
+- Doesn't support `recursive` option.
+  - `rcpy` will always copy directories' content recursively.
+- Doesn't support `verbatimSymlinks` option.
+  - `rcpy` will always perform path resolution for symlinks if `dereference` option is enabled.
+- Extra `concurrency` option.
+  - `rcpy` will use this option to limit the number of concurrent copy operations to prevent `EMFILE` error.
+
 ## License
 
 [MIT](./LICENSE)
diff --git a/src/index.ts b/src/index.ts
index 6d708c7..ea50c4c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -20,6 +20,8 @@ export interface RcpyOption {
    * @default true
    */
   overwrite?: boolean,
+  /** @default 0 */
+  mode?: number,
   /** @default false */
   preserveTimestamps?: boolean,
   /** @default false */
@@ -35,6 +37,7 @@ const rcpy = async (src: string, dest: string, opt: RcpyOption = {}): Promise<vo
     force: opt.overwrite ?? true,
     overwrite: true,
     errorOnExist: false,
+    mode: 0,
     preserveTimestamps: false,
     concurrency: 32
   }, opt);
@@ -92,7 +95,7 @@ const rcpy = async (src: string, dest: string, opt: RcpyOption = {}): Promise<vo
   }
 
   async function copyFile(srcStat: fs.Stats, src: string, dest: string) {
-    await fsp.copyFile(src, dest);
+    await fsp.copyFile(src, dest, _opt.mode);
 
     if (_opt.preserveTimestamps) {
       // Make sure the file is writable before setting the timestamp