Adds ability to remove the forked relationship

This was previously possible through the API but can now be done
through the project#edit settings screen if the current user is
the owner of the project.
Update changelog

5 files changed, 32 insertions, 2 deletions

diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index 213c2a7173b..1fb83d0eb6d 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -5,7 +5,7 @@ class ProjectsController < ApplicationController
   before_action :repository, except: [:new, :create]
 
   # Authorize
-  before_action :authorize_admin_project!, only: [:edit, :update, :destroy, :transfer, :archive, :unarchive]
+  before_action :authorize_admin_project!, only: [:edit, :update, :destroy, :transfer, :archive, :unarchive, :remove_fork]
   before_action :event_filter, only: [:show, :activity]
 
   layout :determine_layout
@@ -64,6 +64,13 @@ class ProjectsController < ApplicationController
     end
   end
 
+  def remove_fork
+    if @project.forked?
+      @project.forked_project_link.destroy
+      flash[:notice] = 'Fork relationship has been removed.'
+    end
+  end
+
   def activity
     respond_to do |format|
       format.html
diff --git a/app/helpers/projects_helper.rb b/app/helpers/projects_helper.rb
index a0220af4c30..b0a3a20fa0a 100644
--- a/app/helpers/projects_helper.rb
+++ b/app/helpers/projects_helper.rb
@@ -70,6 +70,10 @@ module ProjectsHelper
     "You are going to transfer #{project.name_with_namespace} to another owner. Are you ABSOLUTELY sure?"
   end
 
+  def remove_fork_project_message(project)
+    "You are going to remove the fork relationship to the source project from #{@project.forked_from_project.namespace.try(:name)}.  Are you ABSOLUTELY sure?"
+  end
+
   def project_nav_tabs
     @nav_tabs ||= get_project_nav_tabs(@project, current_user)
   end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index a020b24a550..11ada46610b 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -185,7 +185,8 @@ class Ability
         :change_visibility_level,
         :rename_project,
         :remove_project,
-        :archive_project
+        :archive_project,
+        :remove_fork_project
       ]
     end
 
diff --git a/app/views/projects/edit.html.haml b/app/views/projects/edit.html.haml
index 1882a82fba5..ce77a9242fc 100644
--- a/app/views/projects/edit.html.haml
+++ b/app/views/projects/edit.html.haml
@@ -189,6 +189,21 @@
       - else
         .nothing-here-block Only the project owner can transfer a project
 
+      - if @project.forked? && can?(current_user, :remove_fork_project, @project)
+        = form_for([@project.namespace.becomes(Namespace), @project], url: remove_fork_namespace_project_path(@project.namespace, @project), method: :put, remote: true, html: { class: 'transfer-project form-horizontal' }) do |f|
+          .panel.panel-default.panel.panel-danger
+            .panel-heading Remove forked relationship
+            .panel-body
+              %p
+                This will remove the relationship to the source project from
+                = link_to project_path(@project.forked_from_project) do
+                  = @project.forked_from_project.namespace.try(:name)
+                %br
+                %strong Once removed it cannot be reversed through this interface
+              = button_to 'Remove forked relationship', '#', class: "btn btn-remove js-confirm-danger", data: { "confirm-danger-message" => remove_fork_project_message(@project) }
+      - elsif @project.forked?
+        .nothing-here-block Only the project owner can remove the fork relationship
+
       - if can?(current_user, :remove_project, @project)
         .panel.panel-default.panel.panel-danger
           .panel-heading Remove project
@@ -203,6 +218,7 @@
       - else
         .nothing-here-block Only project owner can remove a project
 
+
 .save-project-loader.hide
   .center
     %h2
diff --git a/app/views/projects/remove_fork.js.haml b/app/views/projects/remove_fork.js.haml
new file mode 100644
index 00000000000..17b9fecfeb1
--- /dev/null
+++ b/app/views/projects/remove_fork.js.haml
@@ -0,0 +1,2 @@
+:plain
+    location.href = "#{edit_namespace_project_path(@project.namespace, @project)}";