Fix 'New merge request' button

app/views/projects/merge_requests/_merge_requests.html.haml

@@ -2,7 +2,7 @@
   - if @merge_requests.present?
     = render @merge_requests
   - else
-    = render 'shared/empty_states/merge_requests'
+    = render 'shared/empty_states/merge_requests', button_path: new_merge_request_path
 
 - if @merge_requests.present?
   = paginate_collection @merge_requests, total_pages: @total_pages

app/views/projects/merge_requests/index.html.haml

@@ -23,7 +23,7 @@
     = render 'shared/issuable/bulk_update_sidebar', type: :merge_requests
 
   .merge-requests-holder
-    = render 'merge_requests'
+    = render 'merge_requests', new_merge_request_path: new_merge_request_path
     - if new_merge_request_email
       .gl-text-center.gl-pt-5.gl-pb-7
         .js-issueable-by-email{ data: { initial_email: new_merge_request_email, issuable_type: issuable_type, emails_help_page_path: help_page_path('development/emails', anchor: 'email-namespace'), quick_actions_help_path: help_page_path('user/project/quick_actions'), markdown_help_path: help_page_path('user/markdown'), reset_path: new_issuable_address_project_path(@project, issuable_type: issuable_type) } }

app/views/shared/empty_states/_merge_requests.html.haml

@@ -20,7 +20,7 @@
           = _("To widen your search, change or remove filters above")
         .text-center
           - if can_create_merge_request
-            = link_to _("New merge request"), project_new_merge_request_path(@project), class: "gl-button btn btn-confirm", title: _("New merge request")
+            = link_to _("New merge request"), button_path || project_new_merge_request_path(@project), class: "gl-button btn btn-confirm", title: _("New merge request")
       - elsif is_opened_state && opened_merged_count == 0 && closed_merged_count > 0
         %h4.text-center
           = _("There are no open merge requests")
@@ -28,7 +28,7 @@
           = _("To keep this project going, create a new merge request")
         .text-center
           - if can_create_merge_request
-            = link_to _("New merge request"), project_new_merge_request_path(@project), class: "gl-button btn btn-confirm", title: _("New merge request")
+            = link_to _("New merge request"), button_path || project_new_merge_request_path(@project), class: "gl-button btn btn-confirm", title: _("New merge request")
       - elsif is_closed_state && opened_merged_count > 0 && closed_merged_count == 0
         %h4.text-center
           = _("There are no closed merge requests")

spec/features/merge_requests/user_sees_empty_state_spec.rb

@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe 'Merge request > User sees empty state' do
+  include ProjectForksHelper
+
   let(:project) { create(:project, :public, :repository) }
   let(:user)    { project.creator }
 
@@ -37,4 +39,23 @@ RSpec.describe 'Merge request > User sees empty state' do
       expect(page).to have_content('To widen your search, change or remove filters above')
     end
   end
+
+  context 'as member of a fork' do
+    let(:fork_user) { create(:user) }
+    let(:forked_project) { fork_project(project, fork_user, namespace: fork_user.namespace, repository: true) }
+
+    before do
+      forked_project.add_maintainer(fork_user)
+      sign_in(fork_user)
+    end
+
+    it 'shows an empty state and a "New merge request" button' do
+      visit project_merge_requests_path(project, search: 'foo')
+
+      expect(page).to have_selector('.empty-state')
+      within('.empty-state') do
+        expect(page).to have_link 'New merge request', href: project_new_merge_request_path(forked_project)
+      end
+    end
+  end
 end