new option and updated readme

README.md

@@ -61,9 +61,11 @@ The following PostCSS plugins are enabled by default:
 
 (i.e. the [CSS Modules] specification).
 
-You can supply your own additional PostCSS Plugins by passing `--use|-u` to `css-modulesify`.
+You can override the default PostCSS Plugins (and add your own) by passing `--use|-u` to `css-modulesify`.
 
-In addion you may also wish to configure defined PostCSS plugins by passing `--plugin.option true`.
+Or if you just want to add some extra plugins to run after the default, add them to the `postcssAfter` array option (API only at this time).
+
+In addition you may also wish to configure defined PostCSS plugins by passing `--plugin.option true`.
 
 An example of this would be:
 

index.js

@@ -37,32 +37,36 @@ module.exports = function (browserify, options) {
     if (typeof plugins === 'string') {
       plugins = [ plugins ];
     }
+  }
 
-    plugins = plugins.map(function requirePlugin (name) {
-      // assume functions are already required plugins
-      if (typeof name === 'function') {
-        return name;
-      }
+  var postcssAfter = options.postcssAfter || options.after || [];
+  plugins = plugins.concat(postcssAfter);
 
-      var plugin = require(require.resolve(name));
+  // load plugins by name (if a string is used)
+  plugins = plugins.map(function requirePlugin (name) {
+    // assume functions are already required plugins
+    if (typeof name === 'function') {
+      return name;
+    }
 
-      // custom scoped name generation
-      if (name === 'postcss-modules-scope') {
-        options[name] = options[name] || {};
-        if (!options[name].generateScopedName) {
-          options[name].generateScopedName = createScopedNameFunc(plugin);
-        }
-      }
+    var plugin = require(require.resolve(name));
 
-      if (name in options) {
-        plugin = plugin(options[name]);
-      } else {
-        plugin = plugin.postcss || plugin();
+    // custom scoped name generation
+    if (name === 'postcss-modules-scope') {
+      options[name] = options[name] || {};
+      if (!options[name].generateScopedName) {
+        options[name].generateScopedName = createScopedNameFunc(plugin);
       }
+    }
 
-      return plugin;
-    });
-  }
+    if (name in options) {
+      plugin = plugin(options[name]);
+    } else {
+      plugin = plugin.postcss || plugin();
+    }
+
+    return plugin;
+  });
 
   // keep track of css files visited
   var filenames = [];