Add ability to disable manifest import

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/application_controller.rb

@@ -30,7 +30,13 @@ class ApplicationController < ActionController::Base
   protect_from_forgery with: :exception, prepend: true
 
   helper_method :can?
-  helper_method :import_sources_enabled?, :github_import_enabled?, :gitea_import_enabled?, :github_import_configured?, :gitlab_import_enabled?, :gitlab_import_configured?, :bitbucket_import_enabled?, :bitbucket_import_configured?, :google_code_import_enabled?, :fogbugz_import_enabled?, :git_import_enabled?, :gitlab_project_import_enabled?
+  helper_method :import_sources_enabled?, :github_import_enabled?,
+    :gitea_import_enabled?, :github_import_configured?,
+    :gitlab_import_enabled?, :gitlab_import_configured?,
+    :bitbucket_import_enabled?, :bitbucket_import_configured?,
+    :google_code_import_enabled?, :fogbugz_import_enabled?,
+    :git_import_enabled?, :gitlab_project_import_enabled?,
+    :manifest_import_enabled?
 
   rescue_from Encoding::CompatibilityError do |exception|
     log_exception(exception)
@@ -351,6 +357,10 @@ class ApplicationController < ActionController::Base
     Gitlab::CurrentSettings.import_sources.include?('gitlab_project')
   end
 
+  def manifest_import_enabled?
+    Gitlab::CurrentSettings.import_sources.include?('manifest')
+  end
+
   # U2F (universal 2nd factor) devices need a unique identifier for the application
   # to perform authentication.
   # https://developers.yubico.com/U2F/App_ID.html

app/controllers/import/manifest_controller.rb

 class Import::ManifestController < Import::BaseController
+  before_action :verify_import_enabled
   before_action :ensure_import_vars, only: [:create, :status]
 
   def new
@@ -80,4 +81,8 @@ class Import::ManifestController < Import::BaseController
       .where(creator_id: current_user)
       .includes(:import_state)
   end
+
+  def verify_import_enabled
+    render_404 unless manifest_import_enabled?
+  end
 end

app/views/projects/_import_project_pane.html.haml

@@ -38,13 +38,14 @@
           = link_to new_import_gitea_path, class: 'btn import_gitea' do
             = custom_icon('go_logo')
             Gitea
-      - if git_import_enabled?
       %div
+        - if git_import_enabled?
           %button.btn.js-toggle-button.js-import-git-toggle-button{ type: "button", data: { toggle_open_class: 'active' } }
             = icon('git', text: 'Repo by URL')
       %div
+        - if manifest_import_enabled?
           %button.btn{ type: "button" }
-            = icon('git', text: 'Manifest file')
+            = icon('file', text: 'Manifest file')
 
   .js-toggle-content.toggle-import-form{ class: ('hide' if active_tab != 'import') }
     = form_for @project, html: { class: 'new_project' } do |f|