Build missing cache items in background job after each push

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

app/models/repository.rb

@@ -130,10 +130,29 @@ class Repository
     cache.fetch(:size) { raw_repository.size }
   end
-  def expire_cache
+  def cache_keys
     %i(size branch_names tag_names commit_count graph_log
-       readme version contribution_guide changelog license).each do |key|
+       readme version contribution_guide changelog license)
+  end
+
+  def build_cache
+    cache_keys.each do |key|
+      unless cache.exist?(key)
+        send(key)
+      end
+    end
+  end
+
+  def expire_cache
+    cache_keys.each do |key|
+      cache.expire(key)
+    end
+  end
+
+  def rebuild_cache
+    cache_keys.each do |key|
       cache.expire(key)
+      send(key)
     end
   end

app/services/git_push_service.rb

@@ -61,6 +61,7 @@ class GitPushService
     EventCreateService.new.push(project, user, @push_data)
     project.execute_hooks(@push_data.dup, :push_hooks)
     project.execute_services(@push_data.dup, :push_hooks)
+    ProjectCacheWorker.perform_async(project.id)
   end
   protected

app/services/git_tag_push_service.rb

@@ -2,15 +2,15 @@ class GitTagPushService
   attr_accessor :project, :user, :push_data
   def execute(project, user, oldrev, newrev, ref)
-    @project, @user = project, user
+    project.repository.expire_cache
+    @project, @user = project, user
     @push_data = build_push_data(oldrev, newrev, ref)
     EventCreateService.new.push(project, user, @push_data)
     project.execute_hooks(@push_data.dup, :tag_push_hooks)
     project.execute_services(@push_data.dup, :tag_push_hooks)
-
-    project.repository.expire_cache
+    ProjectCacheWorker.perform_async(project.id)
     true
   end

app/workers/project_cache_worker.rb

+class ProjectCacheWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: :default
+
+  def perform(project_id)
+    Project.find(project_id).repository.build_cache
+  end
+end

lib/repository_cache.rb

@@ -18,4 +18,8 @@ class RepositoryCache
   def fetch(key, &block)
     backend.fetch(cache_key(key), &block)
   end
+
+  def exist?(key)
+    backend.exist?(key)
+  end
 end