module Files class UpdateService < Files::BaseService FileChangedError = Class.new(StandardError) def initialize(*args) super @last_commit_sha = params[:last_commit_sha] end def create_commit! repository.update_file(current_user, @file_path, @file_content, message: @commit_message, branch_name: @branch_name, previous_path: @previous_path, author_email: @author_email, author_name: @author_name, start_project: @start_project, start_branch_name: @start_branch) end private def file_has_changed? return false unless @last_commit_sha && last_commit @last_commit_sha != last_commit.sha end def last_commit @last_commit ||= Gitlab::Git::Commit .last_for_path(@start_project.repository, @start_branch, @file_path) end def validate! super if file_has_changed? raise FileChangedError, "You are attempting to update a file that has changed since you started editing it." end end end end