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# frozen_string_literal: true
module Gitlab
module ImportExport
class ProjectTreeRestorer
# Relations which cannot be saved at project level (and have a group assigned)
GROUP_MODELS = [GroupLabel, Milestone].freeze
attr_reader :user
attr_reader :shared
attr_reader :project
def initialize(user:, shared:, project:)
@path = File.join(shared.export_path, 'project.json')
@user = user
@shared = shared
@project = project
end
def restore
begin
@tree_hash = read_tree_hash
rescue => e
Rails.logger.error("Import/Export error: #{e.message}") # rubocop:disable Gitlab/RailsLogger
raise Gitlab::ImportExport::Error.new('Incorrect JSON format')
end
@project_members = @tree_hash.delete('project_members')
RelationRenameService.rename(@tree_hash)
ActiveRecord::Base.uncached do
ActiveRecord::Base.no_touching do
update_project_params!
create_project_relations!
post_import!
end
end
# ensure that we have latest version of the restore
@project.reload # rubocop:disable Cop/ActiveRecordAssociationReload
true
rescue => e
@shared.error(e)
false
end
private
def read_tree_hash
json = IO.read(@path)
ActiveSupport::JSON.decode(json)
end
def members_mapper
@members_mapper ||= Gitlab::ImportExport::MembersMapper.new(exported_members: @project_members,
user: @user,
project: @project)
end
# A Hash of the imported merge request ID -> imported ID.
def merge_requests_mapping
@merge_requests_mapping ||= {}
end
# Loops through the tree of models defined in import_export.yml and
# finds them in the imported JSON so they can be instantiated and saved
# in the DB. The structure and relationships between models are guessed from
# the configuration yaml file too.
# Finally, it updates each attribute in the newly imported project.
def create_project_relations!
project_relations.each(&method(
:process_project_relation!))
end
def post_import!
@project.merge_requests.set_latest_merge_request_diff_ids!
end
def process_project_relation!(relation_key, relation_definition)
data_hashes = @tree_hash.delete(relation_key)
return unless data_hashes
# we do not care if we process array or hash
data_hashes = [data_hashes] unless data_hashes.is_a?(Array)
# consume and remove objects from memory
while data_hash = data_hashes.shift
process_project_relation_item!(relation_key, relation_definition, data_hash)
end
end
def process_project_relation_item!(relation_key, relation_definition, data_hash)
relation_object = build_relation(relation_key, relation_definition, data_hash)
return unless relation_object
return if group_model?(relation_object)
relation_object.project = @project
relation_object.save!
save_id_mapping(relation_key, data_hash, relation_object)
end
# Older, serialized CI pipeline exports may only have a
# merge_request_id and not the full hash of the merge request. To
# import these pipelines, we need to preserve the mapping between
# the old and new the merge request ID.
def save_id_mapping(relation_key, data_hash, relation_object)
return unless relation_key == 'merge_requests'
merge_requests_mapping[data_hash['id']] = relation_object.id
end
def project_relations
@project_relations ||=
reader
.attributes_finder
.find_relations_tree(:project)
.deep_stringify_keys
end
def update_project_params!
project_params = @tree_hash.reject do |key, value|
project_relations.include?(key)
end
project_params = project_params.merge(
present_project_override_params)
# Cleaning all imported and overridden params
project_params = Gitlab::ImportExport::AttributeCleaner.clean(
relation_hash: project_params,
relation_class: Project,
excluded_keys: excluded_keys_for_relation(:project))
@project.assign_attributes(project_params)
@project.drop_visibility_level!
Gitlab::Timeless.timeless(@project) do
@project.save!
end
end
def present_project_override_params
# we filter out the empty strings from the overrides
# keeping the default values configured
project_override_params.transform_values do |value|
value.is_a?(String) ? value.presence : value
end.compact
end
def project_override_params
@project_override_params ||= @project.import_data&.data&.fetch('override_params', nil) || {}
end
def build_relations(relation_key, relation_definition, data_hashes)
data_hashes.map do |data_hash|
build_relation(relation_key, relation_definition, data_hash)
end.compact
end
def build_relation(relation_key, relation_definition, data_hash)
# TODO: This is hack to not create relation for the author
# Rather make `RelationFactory#set_note_author` to take care of that
return data_hash if relation_key == 'author'
# create relation objects recursively for all sub-objects
relation_definition.each do |sub_relation_key, sub_relation_definition|
transform_sub_relations!(data_hash, sub_relation_key, sub_relation_definition)
end
Gitlab::ImportExport::RelationFactory.create(
relation_sym: relation_key.to_sym,
relation_hash: data_hash,
members_mapper: members_mapper,
merge_requests_mapping: merge_requests_mapping,
user: @user,
project: @project,
excluded_keys: excluded_keys_for_relation(relation_key))
end
def transform_sub_relations!(data_hash, sub_relation_key, sub_relation_definition)
sub_data_hash = data_hash[sub_relation_key]
return unless sub_data_hash
# if object is a hash we can create simple object
# as it means that this is 1-to-1 vs 1-to-many
sub_data_hash =
if sub_data_hash.is_a?(Array)
build_relations(
sub_relation_key,
sub_relation_definition,
sub_data_hash).presence
else
build_relation(
sub_relation_key,
sub_relation_definition,
sub_data_hash)
end
# persist object(s) or delete from relation
if sub_data_hash
data_hash[sub_relation_key] = sub_data_hash
else
data_hash.delete(sub_relation_key)
end
end
def group_model?(relation_object)
GROUP_MODELS.include?(relation_object.class) && relation_object.group_id
end
def reader
@reader ||= Gitlab::ImportExport::Reader.new(shared: @shared)
end
def excluded_keys_for_relation(relation)
reader.attributes_finder.find_excluded_keys(relation)
end
end
end
end
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