Select namespace where to fork project

app/controllers/projects/forks_controller.rb

+class Projects::ForksController < Projects::ApplicationController
+  # Authorize
+  before_filter :authorize_download_code!
+  before_filter :require_non_empty_project
+
+  def new
+    @namespaces = current_user.manageable_namespaces
+    @namespaces.delete(@project.namespace)
+  end
+
+  def create
+    namespace = Namespace.find(params[:namespace_id])
+    @forked_project = ::Projects::ForkService.new(project, current_user, namespace: namespace).execute
+
+    if @forked_project.saved? && @forked_project.forked?
+      redirect_to(@forked_project, notice: 'Project was successfully forked.')
+    else
+      @title = 'Fork project'
+      render :error
+    end
+  end
+end

app/controllers/projects_controller.rb

@@ -111,22 +111,6 @@ class ProjectsController < ApplicationController
     end
   end
 
-  def fork
-    @forked_project = ::Projects::ForkService.new(project, current_user).execute
-
-    respond_to do |format|
-      format.html do
-        if @forked_project.saved? && @forked_project.forked?
-          redirect_to(@forked_project, notice: 'Project was successfully forked.')
-        else
-          @title = 'Fork project'
-          render "fork"
-        end
-      end
-      format.js
-    end
-  end
-
   def autocomplete_sources
     note_type = params['type']
     note_id = params['type_id']

app/models/user.rb

@@ -551,4 +551,14 @@ class User < ActiveRecord::Base
       UsersStarProject.create!(project: project, user: self)
     end
   end
+
+  def manageable_namespaces
+    @manageable_namespaces ||=
+      begin
+        namespaces = []
+        namespaces << namespace
+        namespaces += owned_groups
+        namespaces += masters_groups
+      end
+  end
 end

app/views/projects/_home_panel.html.haml

@@ -20,7 +20,7 @@
               = link_to project_path(current_user.fork_of(@project)), title: 'Go to my fork' do
                 = link_to_toggle_fork
             - else
-              = link_to fork_project_path(@project), title: "Fork project", method: "POST" do
+              = link_to new_project_fork_path(@project), title: "Fork project" do
                 = link_to_toggle_fork
 
       .star-buttons

app/views/projects/fork.html.haml → app/views/projects/forks/error.html.haml

-.alert.alert-danger.alert-block
+- if @forked_project && !@forked_project.saved?
+  .alert.alert-danger.alert-block
     %h4
       %i.fa.fa-code-fork
       Fork Error!
@@ -14,6 +15,6 @@
         = @forked_project.errors.full_messages.first
 
     %p
-    = link_to fork_project_path(@project), title: "Fork", class: "btn", method: "POST" do
+      = link_to new_project_fork_path(@project), title: "Fork", class: "btn" do
         %i.fa.fa-code-fork
         Try to Fork again

app/views/projects/forks/new.html.haml

+%h3.page-title Fork project
+%p.lead Select namespace where to fork this project
+%hr
+
+- @namespaces.in_groups_of(6, false) do |group|
+  .row
+    - group.each do |namespace|
+      .col-md-2.col-sm-3
+        .thumbnail
+          = link_to project_fork_path(@project, namespace_id: namespace.id), title: "Fork here", method: "POST" do
+            - if namespace.kind_of?(Group)
+              = image_tag group_icon(namespace.path)
+            - else
+              = image_tag avatar_icon(namespace.owner.email, 200)
+            .caption
+              %h4=namespace.human_name
+              %p
+                = namespace.path
+

config/routes.rb

@@ -181,7 +181,6 @@ Gitlab::Application.routes.draw do
   resources :projects, constraints: { id: /[a-zA-Z.0-9_\-]+\/[a-zA-Z.0-9_\-]+/ }, except: [:new, :create, :index], path: "/" do
     member do
       put :transfer
-      post :fork
       post :archive
       post :unarchive
       post :upload_image
@@ -232,6 +231,8 @@ Gitlab::Application.routes.draw do
         end
       end
 
+      resource :fork, only: [:new, :create]
+
       resource :repository, only: [:show] do
         member do
           get "archive", constraints: { format: Gitlab::Regex.archive_formats_regex }