Improve storage migration rake task

app/models/project.rb

@@ -272,8 +272,9 @@ class Project < ActiveRecord::Base
   scope :pending_delete, -> { where(pending_delete: true) }
   scope :without_deleted, -> { where(pending_delete: false) }
 
-  scope :with_hashed_storage, -> { where('storage_version >= 1') }
-  scope :with_legacy_storage, -> { where(storage_version: [nil, 0]) }
+  scope :with_storage_feature, ->(feature) { where('storage_version >= :version', version: HASHED_STORAGE_FEATURES[feature]) }
+  scope :without_storage_feature, ->(feature) { where('storage_version < :version OR storage_version IS NULL', version: HASHED_STORAGE_FEATURES[feature]) }
+  scope :with_unmigrated_storage, -> { where('storage_version < :version OR storage_version IS NULL', version: LATEST_STORAGE_VERSION) }
 
   scope :sorted_by_activity, -> { reorder(last_activity_at: :desc) }
   scope :sorted_by_stars, -> { reorder('projects.star_count DESC') }

lib/tasks/gitlab/storage.rake

@@ -2,10 +2,10 @@ namespace :gitlab do
   namespace :storage do
     desc 'GitLab | Storage | Migrate existing projects to Hashed Storage'
     task migrate_to_hashed: :environment do
-      legacy_projects_count = Project.with_legacy_storage.count
+      legacy_projects_count = Project.with_unmigrated_storage.count
 
       if legacy_projects_count == 0
-        puts 'There are no projects using legacy storage. Nothing to do!'
+        puts 'There are no projects requiring storage migration. Nothing to do!'
 
         next
       end
@@ -23,22 +23,42 @@ namespace :gitlab do
 
     desc 'Gitlab | Storage | Summary of existing projects using Legacy Storage'
     task legacy_projects: :environment do
-      projects_summary(Project.with_legacy_storage)
+      relation_summary('projects', Project.without_storage_feature(:repository))
     end
 
     desc 'Gitlab | Storage | List existing projects using Legacy Storage'
     task list_legacy_projects: :environment do
-      projects_list(Project.with_legacy_storage)
+      projects_list('projects using Legacy Storage', Project.without_storage_feature(:repository))
     end
 
     desc 'Gitlab | Storage | Summary of existing projects using Hashed Storage'
     task hashed_projects: :environment do
-      projects_summary(Project.with_hashed_storage)
+      relation_summary('projects using Hashed Storage', Project.with_storage_feature(:repository))
     end
 
     desc 'Gitlab | Storage | List existing projects using Hashed Storage'
     task list_hashed_projects: :environment do
-      projects_list(Project.with_hashed_storage)
+      projects_list('projects using Hashed Storage', Project.with_storage_feature(:repository))
+    end
+
+    desc 'Gitlab | Storage | Summary of project attachments using Legacy Storage'
+    task legacy_attachments: :environment do
+      relation_summary('attachments using Legacy Storage', legacy_attachments_relation)
+    end
+
+    desc 'Gitlab | Storage | List existing project attachments using Legacy Storage'
+    task list_legacy_attachments: :environment do
+      attachments_list('attachments using Legacy Storage', legacy_attachments_relation)
+    end
+
+    desc 'Gitlab | Storage | Summary of project attachments using Hashed Storage'
+    task hashed_attachments: :environment do
+      relation_summary('attachments using Hashed Storage', hashed_attachments_relation)
+    end
+
+    desc 'Gitlab | Storage | List existing project attachments using Hashed Storage'
+    task list_hashed_attachments: :environment do
+      attachments_list('attachments using Hashed Storage', hashed_attachments_relation)
     end
 
     def batch_size
@@ -46,29 +66,43 @@ namespace :gitlab do
     end
 
     def project_id_batches(&block)
-      Project.with_legacy_storage.in_batches(of: batch_size, start: ENV['ID_FROM'], finish: ENV['ID_TO']) do |relation| # rubocop: disable Cop/InBatches
+      Project.with_unmigrated_storage.in_batches(of: batch_size, start: ENV['ID_FROM'], finish: ENV['ID_TO']) do |relation| # rubocop: disable Cop/InBatches
         ids = relation.pluck(:id)
 
         yield ids.min, ids.max
       end
     end
 
-    def projects_summary(relation)
-      projects_count = relation.count
-      puts "* Found #{projects_count} projects".color(:green)
+    def legacy_attachments_relation
+      Upload.joins(<<~SQL).where('projects.storage_version < :version OR projects.storage_version IS NULL', version: Project::HASHED_STORAGE_FEATURES[:attachments])
+        JOIN projects
+          ON (uploads.model_type='Project' AND uploads.model_id=projects.id)
+      SQL
+    end
+
+    def hashed_attachments_relation
+      Upload.joins(<<~SQL).where('projects.storage_version >= :version', version: Project::HASHED_STORAGE_FEATURES[:attachments])
+        JOIN projects
+        ON (uploads.model_type='Project' AND uploads.model_id=projects.id)
+      SQL
+    end
+
+    def relation_summary(relation_name, relation)
+      relation_count = relation.count
+      puts "* Found #{relation_count} #{relation_name}".color(:green)
 
-      projects_count
+      relation_count
     end
 
-    def projects_list(relation)
-      projects_count = projects_summary(relation)
+    def projects_list(relation_name, relation)
+      relation_count = relation_summary(relation_name, relation)
 
       projects = relation.with_route
       limit = ENV.fetch('LIMIT', 500).to_i
 
-      return unless projects_count > 0
+      return unless relation_count > 0
 
-      puts "  ! Displaying first #{limit} projects..." if projects_count > limit
+      puts "  ! Displaying first #{limit} #{relation_name}..." if relation_count > limit
 
       counter = 0
       projects.find_in_batches(batch_size: batch_size) do |batch|
@@ -81,5 +115,26 @@ namespace :gitlab do
         end
       end
     end
+
+    def attachments_list(relation_name, relation)
+      relation_count = relation_summary(relation_name, relation)
+
+      limit = ENV.fetch('LIMIT', 500).to_i
+
+      return unless relation_count > 0
+
+      puts "  ! Displaying first #{limit} #{relation_name}..." if relation_count > limit
+
+      counter = 0
+      relation.find_in_batches(batch_size: batch_size) do |batch|
+        batch.each do |upload|
+          counter += 1
+
+          puts "  - #{upload.path} (id: #{upload.id})".color(:red)
+
+          return if counter >= limit # rubocop:disable Lint/NonLocalExitFromIterator
+        end
+      end
+    end
   end
 end