default_branch for project & fixed project destroy

app/controllers/application_controller.rb

@@ -61,7 +61,7 @@ class ApplicationController < ActionController::Base
     else
       @branch = params[:branch].blank? ? nil : params[:branch]
       @tag = params[:tag].blank? ? nil : params[:tag]
-      @ref = @branch || @tag || Repository.default_ref
+      @ref = @branch || @tag || @project.try(:default_branch) || Repository.default_ref
     end
   end
 

app/models/project.rb

@@ -158,7 +158,7 @@ class Project < ActiveRecord::Base
   end
 
   def root_ref 
-    "master"
+    default_branch || "master"
   end
 
   def public?

app/views/layouts/project.html.haml

@@ -49,7 +49,7 @@
                   %span{ :class => "number" }= @project.snippets.non_expired.count
 
               - if can? current_user, :admin_project, @project
-                = link_to "Project", edit_project_path(@project), :class => (current_page?(edit_project_path(@project))) ? "current" : nil
+                = link_to "Admin", edit_project_path(@project), :class => (current_page?(edit_project_path(@project))) ? "current" : nil
 
             .medium-tags{:style => 'padding: 10px 0 0 10px; width: 210px;'}= tag_list @project
 

app/views/projects/_form.html.haml

@@ -29,6 +29,11 @@
           %cite.right= "http://#{GIT_HOST["host"]}/"
         %td= f.text_field :code, :placeholder => "example"
 
+      - unless @project.heads.empty?  
+        %tr
+          %td= f.label :default_branch, "Default Branch"
+          %td= f.select(:default_branch, @project.heads.map(&:name), {}, :style => "width:300px;")
+
       %tr
         %td= f.label :tag_list
         %td= f.text_area :tag_list, :placeholder => "project tags", :style => "height:50px", :id => :tag_field
@@ -57,4 +62,5 @@
 :javascript
   $(function(){
     taggifyForm();
+    $('form #project_default_branch').chosen();
   })