Only owner of current namespace can change project namespace

app/contexts/project_update_context.rb

@@ -2,7 +2,7 @@ class ProjectUpdateContext < BaseContext
   def execute(role = :default)
     namespace_id = params[:project].delete(:namespace_id)
-    if namespace_id.present?
+    if can?(current_user, :change_namespace, project) && namespace_id.present?
       if namespace_id == Namespace.global_id
         if project.namespace.present?
           # Transfer to global namespace from anyone

app/models/ability.rb

@@ -17,9 +17,7 @@ class Ability
       # Rules based on role in project
       if project.master_access_for?(user)
-        # TODO: replace with master rules.
-        # Only allow project administration for namespace owners
-        rules << project_admin_rules
+        rules << project_master_rules
       elsif project.dev_access_for?(user)
         rules << project_dev_rules
@@ -93,13 +91,15 @@ class Ability
         :admin_merge_request,
         :admin_note,
         :accept_mr,
-        :admin_wiki
+        :admin_wiki,
+        :admin_project
       ]
     end
     def project_admin_rules
       project_master_rules + [
-        :admin_project
+        :change_namespace,
+        :rename_project
       ]
     end

app/views/projects/_form.html.haml

@@ -21,9 +21,15 @@
       = f.label :namespace_id do
         %span Namespace
       .controls
-        = f.select :namespace_id, namespaces_options(@project.namespace_id), {prompt: 'Choose a project namespace'}, {class: 'chosen'}
-         
-        %span.cred Be careful. Changing project namespace can have unintended side effects
+        - if can? current_user, :change_namespace, @project
+          = f.select :namespace_id, namespaces_options(@project.namespace_id), {prompt: 'Choose a project namespace'}, {class: 'chosen'}
+           
+          %span.cred Be careful. Changing project namespace can have unintended side effects
+        - else
+          %a.btn.btn-small.disabled= @project.namespace.try(:human_name) || "/"
+           
+          %span.cred Only owner can change project namespace.
+
     - unless @project.heads.empty?
       .clearfix