Merge branch 'less-chatty-hipchat-intergation' into 'master'

Less chatty HipChat intergation

The HipChat integration is noisy. In our team it constantly overwhelms the channel with a lot of commits or the bodies of their messages. It's very easy to loose the actual conversation in the midst of this.

This request does two things:

* Limit the number of shown commits on every push
* Display only the first line (the subject) of each commit messages

We tried it and found it was nicer for us 

See merge request !159

app/models/project_services/hipchat_service.rb

@@ -18,6 +18,8 @@
 #
 
 class HipchatService < Service
+  MAX_COMMITS = 3
+
   validates :token, presence: true, if: :activated?
 
   def title
@@ -64,8 +66,13 @@ def create_message(push)
       message << "pushed to branch <a href=\"#{project.web_url}/commits/#{ref}\">#{ref}</a> "
       message << "of <a href=\"#{project.web_url}\">#{project.name_with_namespace.gsub!(/\s/,'')}</a> "
       message << "(<a href=\"#{project.web_url}/compare/#{before}...#{after}\">Compare changes</a>)"
-      for commit in push[:commits] do
-        message << "<br /> - #{commit[:message]} (<a href=\"#{commit[:url]}\">#{commit[:id][0..5]}</a>)"
+
+      push[:commits].take(MAX_COMMITS).each do |commit|
+        message << "<br /> - #{commit[:message].lines.first} (<a href=\"#{commit[:url]}\">#{commit[:id][0..5]}</a>)"
+      end
+
+      if push[:commits].count > MAX_COMMITS
+        message << "<br />... #{push[:commits].count - MAX_COMMITS} more commits"
       end
     end