generate a manifest json of export tokens

Author: joshwnj

README.md

@@ -49,6 +49,7 @@ b.bundle();
 
 - `rootDir`: absolute path to your project's root directory. This is optional but providing it will result in better generated classnames.
 - `output`: path to write the generated css
+- `json`: path to write a json manifest of classnames
 - `use`: optional array of postcss plugins (by default we use the css-modules core plugins)
 
 ## PostCSS Plugins

index.js

@@ -29,6 +29,8 @@ module.exports = function (browserify, options) {
     throw new Error('css-modulesify needs the --output / -o option (path to output css file)');
   }
 
+  var jsonOutFilename = options.json;
+
   // PostCSS plugins passed to FileSystemLoader
   var plugins = options.use || options.u;
   if (!plugins) {
@@ -128,6 +130,15 @@ module.exports = function (browserify, options) {
       fs.writeFile(cssOutFilename, css, function () {
         if (typeof cb === 'function') cb.apply(null, args);
       });
+
+      // write the classname manifest
+      if (jsonOutFilename) {
+        fs.writeFile(jsonOutFilename, JSON.stringify(tokensByFile), function (err) {
+          if (err) {
+            browserify.emit('error', err);
+          }
+        });
+      }
     });
 
     return stream;