install letter_opener

Gemfile

@@ -28,6 +28,7 @@ group :assets do
 end
 
 group :development do
+  gem 'letter_opener'
   gem 'rails-footnotes', '>= 3.7.5.rc4'
   gem 'annotate', :git => 'git://github.com/ctran/annotate_models.git'
 end

Gemfile.lock

@@ -119,6 +119,8 @@ GEM
       rails (>= 3.0.0)
     launchy (2.0.5)
       addressable (~> 2.2.6)
+    letter_opener (0.0.2)
+      launchy
     libv8 (3.3.10.2)
     linecache19 (0.5.12)
       ruby_core_source (>= 0.1.4)
@@ -262,6 +264,7 @@ DEPENDENCIES
   jquery-rails
   kaminari
   launchy
+  letter_opener
   pygments.rb (= 0.2.3)
   rails (= 3.1.0)
   rails-footnotes (>= 3.7.5.rc4)

config/environments/development.rb

@@ -29,4 +29,5 @@ Gitlab::Application.configure do
   config.assets.debug = true
 
   config.action_mailer.default_url_options = { :host => 'localhost:3000' }
+  config.action_mailer.delivery_method = :letter_opener
 end