Rocky Zhou wrote: > .dirs .files is just a snapshot of the current directories, which can > be used to delete-outdated files when restoring. Here I used absolute > path by using tar's -P parameter. When fs_rstore, it will do this: > command = "tar -xpz -P -f %s.tgz -T %s" % (archive, self.t_files) > > maybe I want add some parameters of tar, for example, --strip-path=X, > so I hope the fs_rstore can do this: > sh# fs_rstore pages --strip-path=X > rather than: > sh# fs_rstore pages -w '--strip-path=X' > > What should I do?
One possibility using argparse (http://argparse.python-hosting.com/) would be to require the '--' pseudo-argument before all tar options. Then you could do something like:: fs_rstore pages -- --strip-path=X --same-owner That '--' pseudo-argument makes everything else after it into a positional argument (even if they start with '-' or '--'), so you can then just collect those positional arguments and add them to your "command". Here's what that code might look like:: >>> parser = argparse.ArgumentParser(prog='fs_backup') >>> parser.add_argument('-a', '--append', metavar='[t/x[L]:]PATH') >>> parser.add_argument('-d', '--delete', metavar='PATH') >>> parser.add_argument('-t', '--type', ... choices=['full', 'diff', 'incr']) >>> parser.add_argument('identity') >>> parser.add_argument('tar_options', nargs='*') >>> parser.parse_args('-a foo pages -- --strip-path=X') >>> args = parser.parse_args( ... '-a foo pages -- --strip-path=X --same-owner'.split()) >>> args.append 'foo' >>> args.identity 'pages' >>> args.tar_options ['--strip-path=X', '--same-owner'] >>> "tar %s -f %s.tgz" % (' '.join(args.tar_options), args.identity) 'tar --strip-path=X --same-owner -f pages.tgz' Note that all the tar options got collected in 'args.tar_options'. You could get rid of the need for '--' by adding each tar options to your parser with an add_argument() call, but I suspect that's too tedious. I've added a feature request to argparse to make this kind of thing easier:: http://argparse.python-hosting.com/ticket/28 Not sure when I'll have a chance to look into this though. STeVe P.S. You should be able to get similar behavior out of optparse, though you'll have to parse the 'args' list yourself. -- http://mail.python.org/mailman/listinfo/python-list
