Add packages to navigation and policies [ci skip]

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

app/controllers/projects/packages/packages_controller.rb

 module Projects
   module Packages
     class PackagesController < ApplicationController
-      before_action :authorize_admin_project!
+      before_action :verify_packages_enabled!
+      before_action :authorize_read_packages!
+      before_action :authorize_admin_project!, only: [:destroy]
 
       def index
         @packages = project.packages.all.page(params[:page])
@@ -19,6 +21,12 @@ module Projects
 
         redirect_to project_packages_path(@project), notice: _('Package was removed')
       end
+
+      private
+
+      def verify_packages_enabled!
+        render_404 unless Gitlab.config.packages.enabled
+      end
     end
   end
 end

app/helpers/projects_helper.rb

@@ -268,6 +268,10 @@ module ProjectsHelper
       nav_tabs << :container_registry
     end
 
+    if Gitlab.config.packages.enabled && can?(current_user, :read_packages, project)
+      nav_tabs << :packages
+    end
+
     if project.builds_enabled? && can?(current_user, :read_pipeline, project)
       nav_tabs << :pipelines
     end

app/policies/project_policy.rb

@@ -183,6 +183,7 @@ class ProjectPolicy < BasePolicy
     enable :read_commit_status
     enable :read_build
     enable :read_container_image
+    enable :read_packages
     enable :read_pipeline
     enable :read_pipeline_schedule
     enable :read_environment

app/views/layouts/nav/sidebar/_project.html.haml

@@ -262,6 +262,19 @@
                 %strong.fly-out-top-item-name
                   = _('Registry')
 
+      - if project_nav_tab? :packages
+        = nav_link(controller: %w[projects/packages]) do
+          = link_to project_packages_path(@project) do
+            .nav-icon-container
+              = sprite_icon('disk')
+            %span.nav-item-name
+              = _('Packages')
+          %ul.sidebar-sub-level-items.is-fly-out-only
+            = nav_link(controller: %w[projects/packages], html_options: { class: "fly-out-top-item" } ) do
+              = link_to project_packages_path(@project) do
+                %strong.fly-out-top-item-name
+                  = _('Packages')
+
       - if project_nav_tab? :wiki
         = nav_link(controller: :wikis) do
           = link_to get_project_wiki_path(@project), class: 'shortcuts-wiki' do