Move tag deletion to service and execute hooks and services.

app/controllers/projects/tags_controller.rb

@@ -24,14 +24,13 @@ class Projects::TagsController < Projects::ApplicationController
   end
 
   def destroy
-    tag = @repository.find_tag(params[:id])
-
-    if tag && @repository.rm_tag(tag.name)
-      EventCreateService.new.push_ref(@project, current_user, tag, 'rm', Gitlab::Git::TAG_REF_PREFIX)
-    end
+    DeleteTagService.new(project, current_user).execute(params[:id])
 
     respond_to do |format|
-      format.html { redirect_to namespace_project_tags_path }
+      format.html do
+        redirect_to namespace_project_tags_path(@project.namespace,
+                                                @project)
+      end
       format.js
     end
   end

app/services/delete_tag_service.rb

+require_relative 'base_service'
+
+class DeleteTagService < BaseService
+  def execute(tag_name)
+    repository = project.repository
+    tag = repository.find_tag(tag_name)
+
+    # No such tag
+    unless tag
+      return error('No such tag', 404)
+    end
+
+    if repository.rm_tag(tag_name)
+      push_data = build_push_data(tag)
+      
+      EventCreateService.new.push(project, current_user, push_data)
+      project.execute_hooks(push_data.dup, :tag_push_hooks)
+      project.execute_services(push_data.dup, :tag_push_hooks)
+
+      success('Tag was removed')
+    else
+      error('Failed to remove tag')
+    end
+  end
+
+  def error(message, return_code = 400)
+    out = super(message)
+    out[:return_code] = return_code
+    out
+  end
+
+  def success(message)
+    out = super()
+    out[:message] = message
+    out
+  end
+
+  def build_push_data(tag)
+    Gitlab::PushDataBuilder
+      .build(project, current_user, tag.target, Gitlab::Git::BLANK_SHA, "#{Gitlab::Git::TAG_REF_PREFIX}#{tag.name}", [])
+  end
+end