don't try to load airbrake if there is no config for it

Gemfile

@@ -12,7 +12,7 @@ gem 'redcarpet', require: false
 gem 'activerecord-postgres-hstore'
 gem 'acts_as_paranoid'
 gem 'active_attr' # until we get ActiveModel::Model with Rails 4
-gem 'airbrake', '3.1.2' # errbit is broken with 3.1.3 for now
+gem 'airbrake', '3.1.2', require: false # errbit is broken with 3.1.3 for now
 gem 'clockwork', require: false
 gem 'em-redis'
 gem 'eventmachine'

config/airbrake.rb.sample

@@ -0,0 +1,14 @@
+# Internally Dicourse uses Errbit for error logging, 
+#  you can to by setting up an instance and amending this file
+
+Airbrake.configure do |config|
+  config.api_key = 'YOUR API KEY'
+  config.host    = 'errors.example.com'
+  config.port    = 80
+  config.secure  = config.port == 443
+
+
+  # IP Spoof errors can be ignored
+  config.ignore << "ActionDispatch::RemoteIp::IpSpoofAttackError"
+end
+

config/environments/development.rb

@@ -33,12 +33,6 @@ Discourse::Application.configure do
   config.ember.ember_location = "#{Rails.root}/app/assets/javascripts/external/ember.js"
   config.handlebars.precompile = false
 
-  # a bit hacky but works
-  config.after_initialize do
-    config.middleware.delete Airbrake::UserInformer
-    config.middleware.delete Airbrake::Rack
-  end
-
   config.action_mailer.delivery_method = :smtp
   config.action_mailer.smtp_settings = { :address => "localhost", :port => 1025 }
   config.action_mailer.raise_delivery_errors = true

config/initializers/01-redis.rb

@@ -12,7 +12,7 @@ if defined?(PhusionPassenger)
         if forked
             # We're in smart spawning mode.
             $redis = DiscourseRedis.new
-            Discourse::Application.config.cache_store.reconnect# = DiscourseRedis.new_redis_store
+            Discourse::Application.config.cache_store.reconnect
         else
             # We're in conservative spawning mode. We don't need to do anything.
         end

config/initializers/airbrake.rb

@@ -0,0 +1,3 @@
+if Rails.env.production? && File.exists?(Rails.root + '/config/airbrake.rb')
+  require 'airbrake'
+end