First pass at deleting projects in the background.

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
+v 8.6.0 (unreleased)
+  - Delete project and associations in a background worker
+
 v 8.5.0 (unreleased)
   - Ensure rake tasks that don't need a DB connection can be run without one
   - Add "visibility" flag to GET /projects api endpoint

app/controllers/projects_controller.rb

@@ -93,6 +93,10 @@ class ProjectsController < ApplicationController
       return
     end
 
+    if @project.pending_delete?
+      flash[:alert] = "Project queued for delete."
+    end
+
     respond_to do |format|
       format.html do
         if @project.repository_exists?
@@ -120,8 +124,8 @@ class ProjectsController < ApplicationController
   def destroy
     return access_denied! unless can?(current_user, :remove_project, @project)
 
-    ::Projects::DestroyService.new(@project, current_user, {}).execute
-    flash[:alert] = "Project '#{@project.name}' was deleted."
+    ::Projects::DestroyService.new(@project, current_user, {}).pending_delete!
+    flash[:alert] = "Project '#{@project.name}' will be deleted."
 
     redirect_to dashboard_projects_path
   rescue Projects::DestroyService::DestroyError => ex

app/models/project.rb

@@ -36,6 +36,7 @@
 #  build_coverage_regex   :string
 #  build_allow_git_fetch  :boolean          default(TRUE), not null
 #  build_timeout          :integer          default(3600), not null
+#  pending_delete         :boolean
 #
 
 require 'carrierwave/orm/activerecord'

app/services/delete_user_service.rb

@@ -13,7 +13,7 @@ class DeleteUserService
       user.personal_projects.each do |project|
         # Skip repository removal because we remove directory with namespace
         # that contain all this repositories
-        ::Projects::DestroyService.new(project, current_user, skip_repo: true).execute
+        ::Projects::DestroyService.new(project, current_user, skip_repo: true).pending_delete!
       end
 
       user.destroy

app/services/destroy_group_service.rb

@@ -9,7 +9,7 @@ class DestroyGroupService
     @group.projects.each do |project|
       # Skip repository removal because we remove directory with namespace
       # that contain all this repositories
-      ::Projects::DestroyService.new(project, current_user, skip_repo: true).execute
+      ::Projects::DestroyService.new(project, current_user, skip_repo: true).pending_delete!
     end
 
     @group.destroy

app/services/projects/destroy_service.rb

@@ -6,6 +6,12 @@ module Projects
 
     DELETED_FLAG = '+deleted'
 
+    def pending_delete!
+      project.update_attribute(:pending_delete, true)
+
+      ProjectDestroyWorker.perform_in(1.minute, project.id, current_user.id, params)
+    end
+
     def execute
       return false unless can?(current_user, :remove_project, project)
 

app/workers/project_destroy_worker.rb

+class ProjectDestroyWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: :default
+
+  def perform(project_id, user_id, params)
+    begin
+      project = Project.find(project_id)
+    rescue ActiveRecord::RecordNotFound
+      return
+    end
+
+    user = User.find(user_id)
+
+    ::Projects::DestroyService.new(project, user, params).execute
+  end
+end

db/migrate/20160122185421_add_pending_delete_to_project.rb

+class AddPendingDeleteToProject < ActiveRecord::Migration
+  def change
+    add_column :projects, :pending_delete, :boolean
+  end
+end

db/schema.rb

@@ -677,6 +677,7 @@ ActiveRecord::Schema.define(version: 20160128212447) do
     t.string   "build_coverage_regex"
     t.boolean  "build_allow_git_fetch",  default: true,     null: false
     t.integer  "build_timeout",          default: 3600,     null: false
+    t.boolean  "pending_delete"
   end
 
   add_index "projects", ["builds_enabled", "shared_runners_enabled"], name: "index_projects_on_builds_enabled_and_shared_runners_enabled", using: :btree
@@ -728,9 +729,9 @@ ActiveRecord::Schema.define(version: 20160128212447) do
     t.string   "type"
     t.string   "title"
     t.integer  "project_id"
-    t.datetime "created_at",                               null: false
-    t.datetime "updated_at",                               null: false
-    t.boolean  "active",                                   null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.boolean  "active",                default: false,    null: false
     t.text     "properties"
     t.boolean  "template",              default: false
     t.boolean  "push_events",           default: true

lib/api/projects.rb

@@ -246,7 +246,7 @@ module API
       #   DELETE /projects/:id
       delete ":id" do
         authorize! :remove_project, user_project
-        ::Projects::DestroyService.new(user_project, current_user, {}).execute
+        ::Projects::DestroyService.new(user_project, current_user, {}).pending_delete!
       end
 
       # Mark this project as forked from another

spec/models/hooks/system_hook_spec.rb

@@ -36,7 +36,7 @@ describe SystemHook, models: true do
     it "project_destroy hook" do
       user = create(:user)
       project = create(:empty_project, namespace: user.namespace)
-      Projects::DestroyService.new(project, user, {}).execute
+      Projects::DestroyService.new(project, user, {}).pending_delete!
       expect(WebMock).to have_requested(:post, @system_hook.url).with(
         body: /project_destroy/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }