Add more storage statistics

This adds counters for build artifacts and LFS objects, and moves
the preexisting repository_size and commit_count from the projects
table into a new project_statistics table.

The counters are displayed in the administration area for projects
and groups, and also available through the API for admins (on */all)
and normal users (on */owned)

The statistics are updated through ProjectCacheWorker, which can now
do more granular updates with the new :statistics argument.

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index c1e42fb7d47..9f15c08f472 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -101,6 +101,16 @@ module API
       expose :only_allow_merge_if_build_succeeds
       expose :request_access_enabled
       expose :only_allow_merge_if_all_discussions_are_resolved
+
+      expose :statistics, using: 'API::Entities::ProjectStatistics', if: :statistics
+    end
+
+    class ProjectStatistics < Grape::Entity
+      expose :commit_count
+      expose :storage_size
+      expose :repository_size
+      expose :lfs_objects_size
+      expose :build_artifacts_size
     end
 
     class Member < UserBasic
@@ -127,6 +137,15 @@ module API
       expose :avatar_url
       expose :web_url
       expose :request_access_enabled
+
+      expose :statistics, if: :statistics do
+        with_options format_with: -> (value) { value.to_i } do
+          expose :storage_size
+          expose :repository_size
+          expose :lfs_objects_size
+          expose :build_artifacts_size
+        end
+      end
     end
 
     class GroupDetail < Group