Copy file permissions

README.md

@@ -63,6 +63,7 @@ Or, in case of just a `from` with the default destination, you can also use a `{
 |[`transformPath`](#transformPath)|`{Function\|Promise}`|`(targetPath, sourcePath) => path`|Function or Promise that modifies file writing path|
 |[`cache`](#cache)|`{Boolean\|Object}`|`false`|Enable `transform` caching. You can use `{ cache: { key: 'my-cache-key' } }` to invalidate the cache|
 |[`context`](#context)|`{String}`|`options.context \|\| compiler.options.context`|A path that determines how to interpret the `from` path|
+|[`copyPermissions`](#copyPermissions)|`{Boolean}`|`false`|Applies source file permissions to destination files|
 
 ### `from`
 
@@ -301,6 +302,17 @@ and so on...
 ]
 ```
 
+### `copyPermissions`
+
+**webpack.config.js**
+```js
+[
+  new CopyWebpackPlugin([
+    { from: 'src/**/*', to: 'dest/', copyPermissions: true }
+  ], options)
+]
+```
+
 <h2 align="center">Options</h2>
 
 |Name|Type|Default|Description|

src/index.js

@@ -1,6 +1,8 @@
 import path from 'path';
 import preProcessPattern from './preProcessPattern';
 import processPattern from './processPattern';
+import {constants as coreConstants} from 'constants';
+import {chmodSync, constants} from 'fs';
 
 function CopyWebpackPlugin(patterns = [], options = {}) {
     if (!Array.isArray(patterns)) {
@@ -152,6 +154,26 @@ function CopyWebpackPlugin(patterns = [], options = {}) {
                 }
             }
 
+            // Copy permissions for files that requested it
+            let output = compiler.options.output.path;
+            if (output === '/' &&
+                compiler.options.devServer &&
+                compiler.options.devServer.outputPath) {
+                output = compiler.options.devServer.outputPath;
+            }
+
+            for (const key in written) {
+                let value = written[key];
+                if (value.copyPermissions) {
+                    debug(`restoring permissions to ${value.webpackTo}`);
+
+                    let constsfrom = constants || coreConstants;
+
+                    const mask = constsfrom.S_IRWXU | constsfrom.S_IRWXG | constsfrom.S_IRWXO;
+                    chmodSync(path.join(output, value.webpackTo), value.perms & mask);
+                }
+            }
+
             callback();
         };
 

src/writeFile.js

@@ -6,6 +6,7 @@ import { name, version } from '../package.json';
 import findCacheDir from 'find-cache-dir';
 import { stat, readFile } from './utils/promisify';
 import crypto from 'crypto';
+import constants from 'constants';
 
 export default function writeFile(globalRef, pattern, file) {
     const {info, debug, compilation, fileDependencies, written, inputFileSystem, copyUnmodified} = globalRef;
@@ -117,6 +118,22 @@ export default function writeFile(globalRef, pattern, file) {
                 return;
             }
 
+            let perms;
+            if (pattern.copyPermissions) {
+                debug(`saving permissions for '${file.absoluteFrom}'`);
+
+                written[file.absoluteFrom].copyPermissions = pattern.copyPermissions;
+                written[file.absoluteFrom].webpackTo = file.webpackTo;
+
+                let constsfrom = inputFileSystem.constants || constants;
+
+                perms |= stat.mode & constsfrom.S_IRWXU;
+                perms |= stat.mode & constsfrom.S_IRWXG;
+                perms |= stat.mode & constsfrom.S_IRWXO;
+
+                written[file.absoluteFrom].perms = perms;
+            }
+
             info(`writing '${file.webpackTo}' to compilation assets from '${file.absoluteFrom}'`);
             compilation.assets[file.webpackTo] = {
                 size: function() {