Autolinks to issues in commit message (see #155)

It matches #[0-9]+ in commit messages.
For example
 * Fix for #12
 * Code review for #56
 * Test for #15, Review on #54, Fix for #42

 It only links to valid issues (existing and belonging to the current project)
 It does not add any link to the commit in the issue page, it only consists in parsing the commit message when displayed.

 This can be considere as a primary work for the issue #155 on gitlabhq/gitlabhq.

app/helpers/commits_helper.rb

@@ -23,4 +23,23 @@ module CommitsHelper
     link_to "More", project_commits_path(@project, :offset =>  offset.to_i + limit.to_i, :limit => limit),
       :remote => true, :class => "lite_button vm", :style => "text-align:center; width:930px; ", :id => "more-commits-link"
   end
+
+  def commit_msg_with_link_to_issues
+    out = ""
+    @commit.safe_message.split(/(#[0-9]+)/m).each do |m|
+      if m =~ /(#([0-9]+))/m
+        begin
+          issue = Issue.find($2)
+          raise Exception('Issue not belonging to current project, not creating link !') unless issue.project_id == @project.id
+          out+=link_to($1, project_issue_path(@project, $2))
+        rescue
+          out+=$1
+        end
+      else
+        out+= m
+      end
+    end
+    out
+  end
+
 end

app/views/commits/show.html.haml

@@ -18,8 +18,7 @@
 
 %hr
 %pre.commit_message
-  = preserve @commit.safe_message
+  = preserve get_commit_message_with_link_to_issues
-
 .clear
 %br