Set up Raven within init.js

Now that Raven is bundled with webpack, it's not available in the global context, so require it and configure it within the init module.

I struggled to figure out how to expose the raven-js module as a global, as all the combinations of `externals` and `ProvidePlugin` only applied to webpacked modules, not the global window.  The correct way to do it seems to be exports-loader but that looked rather hacky and hard to understand.

src/init.js

@@ -1,5 +1,16 @@
 var jar = require('./lib/jar');
+var Raven = require('raven-js');
 
+/**
+ * -----------------------------------------------------------------------------
+ * Error handling
+ * -----------------------------------------------------------------------------
+ */
+(function () {
+    if (process.env.SENTRY_DSN !== '') {
+        Raven.config(process.env.SENTRY_DSN).install();
+    }
+})();
 
 /**
  * -----------------------------------------------------------------------------

src/template-config.js

@@ -21,12 +21,6 @@ module.exports = {
     // Analytics & Monitoring
     ga_tracker: process.env.GA_TRACKER || '',
 
-    // Error handling
-    sentry_dsn: process.env.SENTRY_DSN || '',
-
     // Use minified JS libraries
     min: (process.env.NODE_ENV === 'production') ? '.min' : '',
-
-    // Redux likes to have this
-    NODE_ENV: process.env.NODE_ENV
 };

src/template.html

@@ -49,13 +49,6 @@
         <script src="/js/{{name}}.intl.js"></script>
         <script src="/js/{{name}}.bundle.js"></script>
 
-        <!-- Error logging (Sentry) -->
-        <script>
-            if ('{{&sentry_dsn}}' !== '') {
-                Raven.config('{{&sentry_dsn}}').install();
-            }
-        </script>
-
         <!-- Analytics (GA) -->
         <script>
             (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){

webpack.config.js

@@ -110,7 +110,8 @@ module.exports = {
             }
         }),
         new webpack.DefinePlugin({
-            'process.env.NODE_ENV': '"' + process.env.NODE_ENV + '"'
+            'process.env.NODE_ENV': '"' + (process.env.NODE_ENV || 'development') + '"',
+            'process.env.SENTRY_DSN': '"' + (process.env.SENTRY_DSN || '') + '"'
         }),
         new webpack.optimize.CommonsChunkPlugin('common', 'js/common.bundle.js'),
         new webpack.optimize.OccurenceOrderPlugin()