Merge remote-tracking branch 'upstream/master' into 27377-preload-pipeline-entity27377-preload-pipeline-entity

* upstream/master: (2534 commits)
  Update VERSION to 9.3.0-pre
  Update CHANGELOG.md for 9.2.0
  removes unnecessary redundacy in usage ping doc
  Respect the typo as rubocop said
  Add a test to ensure this works on MySQL
  Change pipelines schedules help page path
  change domain to hostname in usage ping doc
  Fixes broken MySQL migration for retried
  Show password field mask while editing service settings
  Add notes for supported schedulers and cloud providers
  Move environment monitoring to environments doc
  Add docs for change of Cache/Artifact restore order"
  Avoid resource intensive login checks if password is not provided
  Change translation for 'coding' by 'desarrollo' for Spanish
  Add to docs: issues multiple assignees
  rename "Add emoji" and "Award emoji" to "Add reaction" where appropriate
  Add project and group notification settings info
  32570 Fix border-bottom for project activity tab
  Add users endpoint to frontend API class
  Rename users on mysql
  ...

1 files changed, 78 insertions, 0 deletions

diff --git a/lib/gitlab/database/rename_reserved_paths_migration/v1/rename_namespaces.rb b/lib/gitlab/database/rename_reserved_paths_migration/v1/rename_namespaces.rb
new file mode 100644
index 00000000000..2958ad4b8e5
--- /dev/null
+++ b/lib/gitlab/database/rename_reserved_paths_migration/v1/rename_namespaces.rb
@@ -0,0 +1,78 @@
+module Gitlab
+  module Database
+    module RenameReservedPathsMigration
+      module V1
+        class RenameNamespaces < RenameBase
+          include Gitlab::ShellAdapter
+
+          def rename_namespaces(type:)
+            namespaces_for_paths(type: type).each do |namespace|
+              rename_namespace(namespace)
+            end
+          end
+
+          def namespaces_for_paths(type:)
+            namespaces = case type
+                         when :child
+                           MigrationClasses::Namespace.where.not(parent_id: nil)
+                         when :top_level
+                           MigrationClasses::Namespace.where(parent_id: nil)
+                         end
+            with_paths = MigrationClasses::Route.arel_table[:path].
+                           matches_any(path_patterns)
+            namespaces.joins(:route).where(with_paths)
+          end
+
+          def rename_namespace(namespace)
+            old_full_path, new_full_path = rename_path_for_routable(namespace)
+
+            move_repositories(namespace, old_full_path, new_full_path)
+            move_uploads(old_full_path, new_full_path)
+            move_pages(old_full_path, new_full_path)
+            rename_user(old_full_path, new_full_path) if namespace.kind == 'user'
+            remove_cached_html_for_projects(projects_for_namespace(namespace).map(&:id))
+          end
+
+          def rename_user(old_username, new_username)
+            MigrationClasses::User.where(username: old_username)
+              .update_all(username: new_username)
+          end
+
+          def move_repositories(namespace, old_full_path, new_full_path)
+            repo_paths_for_namespace(namespace).each do |repository_storage_path|
+              # Ensure old directory exists before moving it
+              gitlab_shell.add_namespace(repository_storage_path, old_full_path)
+
+              unless gitlab_shell.mv_namespace(repository_storage_path, old_full_path, new_full_path)
+                message = "Exception moving path #{repository_storage_path} \
+                           from #{old_full_path} to #{new_full_path}"
+                Rails.logger.error message
+              end
+            end
+          end
+
+          def repo_paths_for_namespace(namespace)
+            projects_for_namespace(namespace).distinct.select(:repository_storage).
+              map(&:repository_storage_path)
+          end
+
+          def projects_for_namespace(namespace)
+            namespace_ids = child_ids_for_parent(namespace, ids: [namespace.id])
+            namespace_or_children = MigrationClasses::Project.
+                                      arel_table[:namespace_id].
+                                      in(namespace_ids)
+            MigrationClasses::Project.where(namespace_or_children)
+          end
+
+          def child_ids_for_parent(namespace, ids: [])
+            namespace.children.each do |child|
+              ids << child.id
+              child_ids_for_parent(child, ids: ids) if child.children.any?
+            end
+            ids
+          end
+        end
+      end
+    end
+  end
+end