Simplify Container Registry view implementation

app/models/project.rb

@@ -375,17 +375,19 @@ class Project < ActiveRecord::Base
     @repository ||= Repository.new(path_with_namespace, self)
   end
-  def container_registry
+  def container_registry_repository
     @container_registry_repository ||= begin
       token = Jwt::ContainerRegistryAuthenticationService.full_access_token(path_with_namespace)
-      registry = ContainerRegistry::Registry.new(Gitlab.config.registry.api_url, token: token)
+      url = Gitlab.config.registry.api_url
+      host_port = Gitlab.config.registry.host_port
+      registry = ContainerRegistry::Registry.new(url, token: token, path: host_port)
       registry[path_with_namespace]
     end
   end
-  def container_registry_url
+  def container_registry_repository_url
     if container_registry_enabled? && Gitlab.config.registry.enabled
-      "#{Gitlab.config.registry.host_with_port}/#{path_with_namespace}"
+      "#{Gitlab.config.registry.host_port}/#{path_with_namespace}"
     end
   end

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

 - page_title "Container Registry"
 = render "header_title"
-.light.prepend-top-default
-  %p
-    A 'container image' is a snapshot of a container.
-    You can host your 'container images' with GitLab.
-    %br
-    To start using container images hosted on GitLab you first need to login:
-    %pre
-      %code
-        docker login #{Gitlab.config.registry.host_port}
-    %br
-    Then you are free to create and upload a container images with build and push commands:
-    %pre
-      docker build -t #{Gitlab.config.registry.host_port}/#{@project.path_with_namespace} .
-      %br
-      docker push #{Gitlab.config.registry.host_port}/#{@project.path_with_namespace}
-
 %hr
 %ul.content-list
   - if @tags.blank?
     %li
-      .nothing-here-block No images to show
+      .nothing-here-block No images in Container Registry for this project.
+
+    .light.prepend-top-default
+      %p
+        A 'container image' is a snapshot of a container.
+        You can host your container images with GitLab.
+        %br
+        To start using container images hosted on GitLab you first need to login:
+        %pre
+          %code
+            docker login #{Gitlab.config.registry.host_port}
+        %br
+        Then you are free to create and upload a container images with build and push commands:
+        %pre
+          docker build -t #{escape_once(@project.container_registry_repository_url)} .
+          %br
+          docker push #{escape_once(@project.container_registry_repository_url)}
+
   - else
     .table-holder
       %table.table.builds
         %thead
           %tr
             %th Name
-            %th Digest
+            %th Image ID
             %th Size
             %th Created
             %th
@@ -37,8 +38,8 @@
         - @tags.each do |tag|
           %tr
             %td
-              #{tag.repository.name}:#{tag.name}
-              = clipboard_button(clipboard_text: "docker pull #{Gitlab.config.registry.host_port}/#{tag.repository.name}:#{tag.name}")
+              = escape_once(tag.name)
+              = clipboard_button(clipboard_text: "docker pull #{tag.path}")
             %td
               - if layer = tag.layers.first
                 %span.has-tooltip(title="#{layer.revision}")

lib/container_registry/blob.rb

@@ -11,6 +11,10 @@ module ContainerRegistry
       digest.present?
     end
+    def path
+      "#{repository.path}@#{digest}"
+    end
+
     def digest
       config['digest']
     end

lib/container_registry/registry.rb

 module ContainerRegistry
   class Registry
-    attr_reader :uri, :client
+    attr_reader :uri, :client, :path
     def initialize(uri, options = {})
+      @path = uri || options[:path]
       @uri = URI.parse(uri)
       @client = ContainerRegistry::Client.new(uri, options)
     end

lib/container_registry/repository.rb

@@ -10,6 +10,10 @@ module ContainerRegistry
       @client ||= registry.client
     end
+    def path
+      [registry.path, name].compact.join('/')
+    end
+
     def [](tag)
       ContainerRegistry::Tag.new(self, tag)
     end

lib/container_registry/tag.rb

@@ -15,6 +15,10 @@ module ContainerRegistry
       @manifest = client.repository_manifest(repository.name, name)
     end
+    def path
+      "#{repository.path}:#{name}"
+    end
+
     def [](key)
       return unless manifest
       manifest[key]