Merge pull request #3 from AnujRNair/an/issue-2-try-catch-map-file-removal

ISSUE-2: Wrap .map removal in try catch incase they dont exist

Author: AnujRNair

Diff for: README.md

@@ -4,7 +4,7 @@ A webpack plugin to remove unwanted files which may have been created and output
 
 ## Problem
 
-When using ExtractTextPlugin, it's not possible to generate a css file for each chunk webpack outputs, if you're using [code splitting]([https://webpack.js.org/guides/code-splitting/]).
+When using ExtractTextPlugin, it's not possible to generate a css file for each chunk webpack outputs, if you're using [code splitting](https://webpack.js.org/guides/code-splitting/).
 
 The only possible way to do this is to have an entry point for each top level css / less / scss file, however this will create small js files with empty webpack functions in them, which are undesirable.
 

Diff for: lib/plugin.js

@@ -71,9 +71,13 @@ ExtraneousFileCleanupPlugin.prototype.apply = function (compiler) {
 
       // remove from various places
       fs.unlinkSync(outputPath + '/' + assetKey)          // unlink the asset
-      fs.unlinkSync(outputPath + '/' + assetKey + '.map') // unlink the map file
       delete compilation.assets[assetKey]                 // remove from webpack output
-      delete compilation.assets[assetKey + '.map']        // remove from webpack output
+
+      // remove map file from various places if it exists
+      try {
+        fs.unlinkSync(outputPath + '/' + assetKey + '.map') // unlink the map file
+        delete compilation.assets[assetKey + '.map']        // remove from webpack output
+      } catch (e) {}
 
       if (usingManifestJson) {
         for (manifestKey in manifestJson) {