New feature: Ability to leave project

app/controllers/projects/team_members_controller.rb

 class Projects::TeamMembersController < Projects::ApplicationController
   # Authorize
-  before_filter :authorize_admin_project!
+  before_filter :authorize_admin_project!, except: :leave
 
   layout "project_settings"
 
@@ -45,6 +45,15 @@ class Projects::TeamMembersController < Projects::ApplicationController
     end
   end
 
+  def leave
+    project.users_projects.find_by_user_id(current_user).destroy
+
+    respond_to do |format|
+      format.html { redirect_to :back }
+      format.js { render nothing: true }
+    end
+  end
+
   def apply_import
     giver = Project.find(params[:source_project_id])
     status = @project.team.import(giver)

app/models/project.rb

@@ -317,7 +317,7 @@ class Project < ActiveRecord::Base
     mrs = self.merge_requests.opened.by_branch(branch_name).all
     # Update code for merge requests between project and project fork
     mrs += self.fork_merge_requests.opened.by_branch(branch_name).all
-    
+
     mrs.each { |merge_request| merge_request.reload_code; merge_request.mark_as_unchecked }
 
     # Close merge requests
@@ -447,4 +447,8 @@ class Project < ActiveRecord::Base
       order('id DESC').limit(100).
       update_all(updated_at: Time.now)
   end
+
+  def project_member(user)
+    users_projects.where(user_id: user).first
+  end
 end

app/models/user.rb

@@ -394,4 +394,9 @@ class User < ActiveRecord::Base
 
     self
   end
+
+  def can_leave_project?(project)
+    project.namespace != namespace &&
+      project.project_member(self)
+  end
 end

app/views/dashboard/projects.html.haml

@@ -54,7 +54,7 @@
   .span9
     %ul.bordered-list.my-projects.top-list
       - @projects.each do |project|
-        %li
+        %li.my-project-row
           %h4.project-title
             = link_to project_path(project), class: dom_class(project) do
               = project.name_with_namespace
@@ -63,6 +63,12 @@
                 = public_icon
                 Public
 
+            - if current_user.can_leave_project?(project)
+              .pull-right
+                = link_to leave_project_team_members_path(project), confirm: "Leave project?", method: :delete, remote: true, class: "btn-tiny btn remove-row", title: 'Leave project' do
+                  %i.icon-signout
+                  Leave
+
             - if project.forked_from_project
               %small.pull-right
                 %i.icon-code-fork
@@ -80,6 +86,7 @@
               %span.light Last activity:
               %span.date= project_last_activity(project)
 
+
         - if @projects.blank?
           %li
             %h3.nothing_here_message There are no projects here.

config/routes.rb

@@ -288,6 +288,7 @@ Gitlab::Application.routes.draw do
 
       resources :team_members, except: [:index, :edit], constraints: { id: /[a-zA-Z.\/0-9_\-#%+]+/ } do
         collection do
+          delete :leave
 
           # Used for import team
           # from another project