Prepare ForkService to support forking projects to given namespaces

Remove overload of BaseService.initialize, so initialize gains params,
which is used to pass the namespace (like e.g. in TransferService).

The namespace is checked for permission to create projects in it.

CHANGELOG

@@ -9,6 +9,7 @@ v 7.4.0
   - Do not delete tmp/repositories itself during clean-up, only its contents
   - Support for backup uploads to remote storage
   - Prevent notes polling when there are not notes
+  - Internal ForkService: Prepare support for fork to a given namespace
   - API: Add support for forking a project via the API (Bernhard Kaindl)
   - API: filter project issues by milestone (Julien Bianchi)
   - Fail harder in the backup script

app/services/projects/fork_service.rb

@@ -2,11 +2,9 @@ module Projects
   class ForkService < BaseService
     include Gitlab::ShellAdapter
-    def initialize(project, user)
-      @from_project, @current_user = project, user
-    end
-
     def execute
+      @from_project = @project
+
       project_params = {
         visibility_level: @from_project.visibility_level,
         description: @from_project.description,
@@ -15,8 +13,15 @@ module Projects
       project = Project.new(project_params)
       project.name = @from_project.name
       project.path = @from_project.path
-      project.namespace = current_user.namespace
-      project.creator = current_user
+      project.namespace = @current_user.namespace
+      if namespace = @params[:namespace]
+        project.namespace = namespace
+      end
+      project.creator = @current_user
+      unless @current_user.can?(:create_projects, project.namespace)
+        project.errors.add(:namespace, 'insufficient access rights')
+        return project
+      end
       # If the project cannot save, we do not want to trigger the project destroy
       # as this can have the side effect of deleting a repo attached to an existing
@@ -27,7 +32,7 @@ module Projects
             #First save the DB entries as they can be rolled back if the repo fork fails
             project.build_forked_project_link(forked_to_project_id: project.id, forked_from_project_id: @from_project.id)
             if project.save
-              project.team << [current_user, :master]
+              project.team << [@current_user, :master]
             end
             #Now fork the repo
             unless gitlab_shell.fork_repository(@from_project.path_with_namespace, project.namespace.path)

spec/services/projects/fork_service_spec.rb

@@ -42,10 +42,54 @@ describe Projects::ForkService do
     end
   end
-  def fork_project(from_project, user, fork_success = true)
-    context = Projects::ForkService.new(from_project, user)
-    shell = double("gitlab_shell")
-    shell.stub(fork_repository: fork_success)
+  describe :fork_to_namespace do
+    before do
+      @group_owner = create(:user)
+      @developer   = create(:user)
+      @project     = create(:project, creator_id: @group_owner.id,
+                                      star_count: 777,
+                                      description: 'Wow, such a cool project!')
+      @group = create(:group)
+      @group.add_user(@group_owner, GroupMember::OWNER)
+      @group.add_user(@developer,   GroupMember::DEVELOPER)
+      @opts = { namespace: @group }
+    end
+
+    context 'fork project for group' do
+      it 'group owner successfully forks project into the group' do
+        to_project = fork_project(@project, @group_owner, true, @opts)
+        to_project.owner.should       == @group
+        to_project.namespace.should   == @group
+        to_project.name.should        == @project.name
+        to_project.path.should        == @project.path
+        to_project.description.should == @project.description
+        to_project.star_count.should     be_zero
+      end
+    end
+
+    context 'fork project for group when user not owner' do
+      it 'group developer should fail to fork project into the group' do
+        to_project = fork_project(@project, @developer, true, @opts)
+        to_project.errors[:namespace].should == ['insufficient access rights']
+      end
+    end
+
+    context 'project already exists in group' do
+      it 'should fail due to validation, not transaction failure' do
+        existing_project = create(:project, name: @project.name,
+                                            namespace: @group)
+        to_project = fork_project(@project, @group_owner, true, @opts)
+        existing_project.persisted?.should be_true
+        to_project.errors[:base].should == ['Invalid fork destination']
+        to_project.errors[:name].should == ['has already been taken']
+        to_project.errors[:path].should == ['has already been taken']
+      end
+    end
+  end
+
+  def fork_project(from_project, user, fork_success = true, params = {})
+    context = Projects::ForkService.new(from_project, user, params)
+    shell = double('gitlab_shell').stub(fork_repository: fork_success)
     context.stub(gitlab_shell: shell)
     context.execute
   end