Switchable the main branch on network graph

app/controllers/graph_controller.rb

@@ -0,0 +1,18 @@
+class GraphController < ProjectResourceController
+  include ExtractsPath
+
+  # Authorize
+  before_filter :authorize_read_project!
+  before_filter :authorize_code_access!
+  before_filter :require_non_empty_project
+
+  def show
+    respond_to do |format|
+      format.html
+      format.json do
+        graph = Gitlab::Graph::JsonBuilder.new(project, @ref)
+        render :json => graph.to_json
+      end
+    end
+  end
+end

app/controllers/projects_controller.rb

@@ -90,16 +90,6 @@ class ProjectsController < ProjectResourceController
     end
   end
 
-  def graph
-    respond_to do |format|
-      format.html
-      format.json do
-        graph = Gitlab::Graph::JsonBuilder.new(project)
-        render :json => graph.to_json
-      end
-    end
-  end
-
   def destroy
     return access_denied! unless can?(current_user, :remove_project, project)
 

app/controllers/refs_controller.rb

@@ -13,6 +13,8 @@ class RefsController < ProjectResourceController
       format.html do
         new_path = if params[:destination] == "tree"
                      project_tree_path(@project, (@ref + "/" + params[:path]))
+                   elsif params[:destination] == "graph"
+                     project_graph_path(@project, @ref)
                    else
                      project_commits_path(@project, @ref)
                    end

app/views/graph/show.html.haml

@@ -1,6 +1,7 @@
 %h3.page_title Project Network Graph
 %br
-
+= render partial: 'shared/ref_switcher', locals: {destination: 'graph', path: @path}
+%br
 .graph_holder
   %h4
     %small You can move around the graph by using the arrow keys.
@@ -11,7 +12,8 @@
   var branch_graph;
   $(function(){
     branch_graph = new BranchGraph($("#holder"), {
-      url: '#{url_for controller: 'projects', action: 'graph', format: :json}',
-      commit_url: '#{project_commit_path(@project, 'ae45ca32').gsub("ae45ca32", "%s")}'
+      url: '#{project_graph_path(@project, @ref, format: :json)}',
+      commit_url: '#{project_commit_path(@project, 'ae45ca32').gsub("ae45ca32", "%s")}',
+      ref: '#{@ref}'
     });
   });

app/views/layouts/project_resource.html.haml

@@ -20,8 +20,8 @@
               = link_to 'Files', project_tree_path(@project, @ref || @repository.root_ref)
             = nav_link(controller: %w(commit commits compare repositories protected_branches)) do
               = link_to "Commits", project_commits_path(@project, @ref || @repository.root_ref)
-            = nav_link(path: 'projects#graph') do
-              = link_to "Network", graph_project_path(@project)
+            = nav_link(controller: %w(graph)) do
+              = link_to "Network", project_graph_path(@project, @ref || @repository.root_ref)
 
         - if @project.issues_enabled
           = nav_link(controller: %w(issues milestones labels)) do