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# frozen_string_literal: true
module Projects
module ContainerRepository
class CleanupTagsService < BaseService
def execute(container_repository)
return error('access denied') unless can_destroy?
return error('invalid regex') unless valid_regex?
tags = container_repository.tags
original_size = tags.size
tags = without_latest(tags)
tags = filter_by_name(tags)
before_truncate_size = tags.size
tags = truncate(tags)
after_truncate_size = tags.size
tags = filter_keep_n(tags)
tags = filter_by_older_than(tags)
delete_tags(container_repository, tags).tap do |result|
result[:original_size] = original_size
result[:before_truncate_size] = before_truncate_size
result[:after_truncate_size] = after_truncate_size
result[:before_delete_size] = tags.size
result[:status] = :error if before_truncate_size != after_truncate_size
end
end
private
def delete_tags(container_repository, tags)
return success(deleted: []) unless tags.any?
tag_names = tags.map(&:name)
service = Projects::ContainerRepository::DeleteTagsService.new(
container_repository.project,
current_user,
tags: tag_names,
container_expiration_policy: params['container_expiration_policy']
)
service.execute(container_repository)
end
def without_latest(tags)
tags.reject(&:latest?)
end
def order_by_date(tags)
now = DateTime.current
tags.sort_by { |tag| tag.created_at || now }.reverse
end
def filter_by_name(tags)
regex_delete = ::Gitlab::UntrustedRegexp.new("\\A#{params['name_regex_delete'] || params['name_regex']}\\z")
regex_retain = ::Gitlab::UntrustedRegexp.new("\\A#{params['name_regex_keep']}\\z")
tags.select do |tag|
# regex_retain will override any overlapping matches by regex_delete
regex_delete.match?(tag.name) && !regex_retain.match?(tag.name)
end
end
def filter_keep_n(tags)
return tags unless params['keep_n']
tags = order_by_date(tags)
tags.drop(keep_n)
end
def filter_by_older_than(tags)
return tags unless params['older_than']
older_than = ChronicDuration.parse(params['older_than']).seconds.ago
tags.select do |tag|
tag.created_at && tag.created_at < older_than
end
end
def can_destroy?
return true if params['container_expiration_policy']
can?(current_user, :destroy_container_image, project)
end
def valid_regex?
%w(name_regex_delete name_regex name_regex_keep).each do |param_name|
regex = params[param_name]
::Gitlab::UntrustedRegexp.new(regex) unless regex.blank?
end
true
rescue RegexpError => e
::Gitlab::ErrorTracking.log_exception(e, project_id: project.id)
false
end
def truncate(tags)
return tags unless throttling_enabled?
return tags if max_list_size == 0
# truncate the list to make sure that after the #filter_keep_n
# execution, the resulting list will be max_list_size
truncated_size = max_list_size + keep_n
return tags if tags.size <= truncated_size
tags.sample(truncated_size)
end
def throttling_enabled?
Feature.enabled?(:container_registry_expiration_policies_throttling)
end
def max_list_size
::Gitlab::CurrentSettings.current_application_settings.container_registry_cleanup_tags_service_max_list_size.to_i
end
def keep_n
params['keep_n'].to_i
end
end
end
end
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