Allow disabling Gravatars in gitlab.yml settings

Closes #1237

app/helpers/application_helper.rb

@@ -2,10 +2,13 @@ require 'digest/md5'
 module ApplicationHelper
   def gravatar_icon(user_email = '', size = 40)
-    return unless user_email
-    gravatar_host = request.ssl? ? "https://secure.gravatar.com" :  "http://www.gravatar.com"
-    user_email.strip!
-    "#{gravatar_host}/avatar/#{Digest::MD5.hexdigest(user_email.downcase)}?s=#{size}&d=identicon"
+    if Gitlab.config.disable_gravatar? || user_email.blank?
+      'no_avatar.png'
+    else
+      gravatar_prefix = request.ssl? ? "https://secure" : "http://www"
+      user_email.strip!
+      "#{gravatar_prefix}.gravatar.com/avatar/#{Digest::MD5.hexdigest(user_email.downcase)}?s=#{size}&d=identicon"
+    end
   end
   def request_protocol

config/gitlab.yml.example

-# # # # # # # # # # # # # # # # # # 
+# # # # # # # # # # # # # # # # # #
 # Gitlab application config file  #
 # # # # # # # # # # # # # # # # # #
@@ -19,14 +19,14 @@ email:
 # Application specific settings
 # Like default project limit for user etc
-app: 
-  default_projects_limit: 10 
+app:
+  default_projects_limit: 10
   # backup_path: "/vol/backups"   # default: Rails.root + backups/
   # backup_keep_time: 604800      # default: 0 (forever) (in seconds)
-
-# 
-# 2. Advanced settings: 
+  # disable_gravatar: true        # default: false - Disable user avatars from Gravatar.com
+#
+# 2. Advanced settings:
 # ==========================
 # Git Hosting configuration
@@ -39,7 +39,6 @@ git_host:
   receive_pack: true
   # port: 22
-
 # Git settings
 # Use default values unless you understand it
 git:

config/initializers/1_settings.rb

@@ -111,5 +111,9 @@ class Settings < Settingslogic
     def backup_keep_time
       app['backup_keep_time'] || 0
     end
+
+    def disable_gravatar?
+      app['disable_gravatar'] || false
+    end
   end
 end

spec/helpers/application_helper_spec.rb

+require 'spec_helper'
+
+describe ApplicationHelper do
+  describe "gravatar_icon" do
+    let(:user_email) { 'user@email.com' }
+
+    it "should return a generic avatar path when Gravatar is disabled" do
+      Gitlab.config.stub(:disable_gravatar?).and_return(true)
+      gravatar_icon(user_email).should == 'no_avatar.png'
+    end
+
+    it "should return a generic avatar path when email is blank" do
+      gravatar_icon('').should == 'no_avatar.png'
+    end
+
+    it "should use SSL when appropriate" do
+      stub!(:request).and_return(double(:ssl? => true))
+      gravatar_icon(user_email).should match('https://secure.gravatar.com')
+    end
+
+    it "should accept a custom size" do
+      stub!(:request).and_return(double(:ssl? => false))
+      gravatar_icon(user_email, 64).should match(/\?s=64/)
+    end
+  end
+end