Feature/ Support regex path names

.gitignore

@@ -27,3 +27,6 @@ build/Release
 # Dependency directory
 # https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
 node_modules
+
+# editor configuration
+.vscode

README.md

@@ -32,10 +32,7 @@ const webpack = require('webpack'); //to access built-in plugins
 const path = require('path');
 
 // the path(s) that should be cleaned
-let pathsToClean = [
-  'dist',
-  'build'
-]
+let pathsToClean = /dist|build/;
 
 // the clean options to use
 let cleanOptions = {
@@ -71,12 +68,13 @@ const webpackConfig = {
 
 
 ### Paths (Required)
-An [array] of string paths to clean
+An [array] of string or regex paths to clean
 ```js
 [
   'dist',         // removes 'dist' folder
   'build/*.*',    // removes all files in 'build' folder
-  'web/*.js'      // removes all JavaScript files in 'web' folder
+  'web/*.js',     // removes all JavaScript files in 'web' folder
+  /_.+/i,         // removes all the files / folders matching the regex
 ]
 ```
 

index.js

@@ -44,8 +44,8 @@ function CleanWebpackPlugin(paths, options) {
   // determine webpack root
   options.root = options.root || path.dirname(module.parent.filename);
 
-  // allows for a single string entry
-  if (typeof paths == 'string' || paths instanceof String) {
+  // allows for a single string entry or a regular expression
+  if (typeof paths == 'string' || paths instanceof String || paths instanceof RegExp) {
     paths = [paths];
   }
 
@@ -54,6 +54,19 @@ function CleanWebpackPlugin(paths, options) {
   this.options = options;
 }
 
+/**
+ * Gives back file paths that match the given pattern
+ *
+ * @param {string} root
+ * @param {RegExp} pattern
+ * @returns [string]
+ */
+function resolveRegexPaths(root, pattern) {
+  var rootChildren = fs.readdirSync(root);
+
+  return rootChildren.filter(pattern.test.bind(pattern));
+}
+
 var clean = function() {
   var _this = this;
   var results = [];
@@ -88,6 +101,17 @@ var clean = function() {
     webpackDir = upperCaseWindowsRoot(webpackDir);
   }
 
+  // Resolve RegExp paths.
+  _this.paths = _this.paths.reduce(function (paths, currentPath) {
+    if (currentPath instanceof RegExp) {
+      var resolvedPaths = resolveRegexPaths(_this.options.root, currentPath);
+      return paths.concat(resolvedPaths);
+    }
+      return paths.concat(currentPath);
+  }, []);
+
+
+
   // preform an rm -rf on each path
   _this.paths.forEach(function(rimrafPath) {
     rimrafPath = path.resolve(_this.options.root, rimrafPath);