Remove add_namespace call for project creation

Since CreateRepository will do a mkdir -p when creating a new
repository, we do not need to call AddNamespace before creating the
repository.

app/models/storage/hashed_project.rb

@@ -27,8 +27,12 @@ module Storage
       "#{base_dir}/#{disk_hash}" if disk_hash
     end
 
+    # TODO: remove this method entirely after 12.4 https://gitlab.com/gitlab-org/gitlab/issues/33244
+    # we no longer need ensure_storage_path_exists to call add_namespace since both creating and moving
+    # repositories will be preceded by a mkdir -p in gitaly to ensure the parent of the destination directory
+    # exists.
     def ensure_storage_path_exists
-      gitlab_shell.add_namespace(repository_storage, base_dir)
+      true
     end
 
     def rename_repo(old_full_path: nil, new_full_path: nil)

app/models/storage/legacy_project.rb

@@ -23,10 +23,14 @@ module Storage
       project.full_path
     end
 
+    # TODO: remove this method entirely after 12.4 https://gitlab.com/gitlab-org/gitlab/issues/33244
+    # we no longer need ensure_storage_path_exists to call add_namespace since both creating and moving
+    # repositories will be preceded by a mkdir -p in gitaly to ensure the parent of the destination directory
+    # exists.
     def ensure_storage_path_exists
       return unless namespace
 
-      gitlab_shell.add_namespace(repository_storage, base_dir)
+      true
     end
 
     def rename_repo(old_full_path: nil, new_full_path: nil)

lib/gitlab/shell.rb

@@ -113,10 +113,6 @@ module Gitlab
       success
     end
 
-    # Move repository reroutes to mv_directory which is an alias for
-    # mv_namespace. Given the underlying implementation is a move action,
-    # indescriminate of what the folders might be.
-    #
     # storage - project's storage path
     # path - project disk path
     # new_path - new project disk path
@@ -275,7 +271,6 @@ module Gitlab
 
       false
     end
-    alias_method :mv_directory, :mv_namespace # Note: ShellWorker uses this alias
 
     def url_to_repo(path)
       Gitlab.config.gitlab_shell.ssh_path_prefix + "#{path}.git"

spec/lib/backup/repository_spec.rb

@@ -10,7 +10,6 @@ describe Backup::Repository do
   before do
     allow(progress).to receive(:puts)
     allow(progress).to receive(:print)
-    allow(FileUtils).to receive(:mkdir_p).and_return(true)
     allow(FileUtils).to receive(:mv).and_return(true)
 
     allow_any_instance_of(described_class).to receive(:progress).and_return(progress)

spec/models/project_spec.rb

@@ -3648,14 +3648,6 @@ describe Project do
       end
     end
 
-    describe '#ensure_storage_path_exists' do
-      it 'delegates to gitlab_shell to ensure namespace is created' do
-        expect(gitlab_shell).to receive(:add_namespace).with(project.repository_storage, project.base_dir)
-
-        project.ensure_storage_path_exists
-      end
-    end
-
     describe '#legacy_storage?' do
       it 'returns true when storage_version is nil' do
         project = build(:project, storage_version: nil)
@@ -3770,16 +3762,6 @@ describe Project do
       end
     end
 
-    describe '#ensure_storage_path_exists' do
-      it 'delegates to gitlab_shell to ensure namespace is created' do
-        allow(project).to receive(:gitlab_shell).and_return(gitlab_shell)
-
-        expect(gitlab_shell).to receive(:add_namespace).with(project.repository_storage, hashed_prefix)
-
-        project.ensure_storage_path_exists
-      end
-    end
-
     describe '#pages_path' do
       it 'returns a path where pages are stored' do
         expect(project.pages_path).to eq(File.join(Settings.pages.path, project.namespace.full_path, project.path))

spec/services/groups/destroy_service_spec.rb

@@ -8,7 +8,7 @@ describe Groups::DestroyService do
   let!(:user)         { create(:user) }
   let!(:group)        { create(:group) }
   let!(:nested_group) { create(:group, parent: group) }
-  let!(:project)      { create(:project, :legacy_storage, namespace: group) }
+  let!(:project)      { create(:project, :repository, :legacy_storage, namespace: group) }
   let!(:notification_setting) { create(:notification_setting, source: group)}
   let(:gitlab_shell) { Gitlab::Shell.new }
   let(:remove_path)  { group.path + "+#{group.id}+deleted" }