#!/usr/bin/env python

import os
from optparse import OptionParser

parser = OptionParser(usage="%prog [OPTIONS] [DIR]", version="%prog v0.1")
parser.add_option("-y", "--assume-yes", help="Delete backup files non-interactively",
                  action="store_true", dest="yes", default=False)
parser.add_option("-p", "--pattern", dest="pattern", metavar="PATTERN", type="string",
                  help="set globbing pattern to match files to delete (takes precedence over --regex)",
                  default="*~")
parser.add_option("-r", "--regex", dest="regex", metavar="REGEX", type="string",
                  help="set regular expression to match files to delete (--pattern takes precedence)",
                  default="")

options, args = parser.parse_args()

if len(args) > 1:
    parser.error()
elif args:
    dir_str = str(args[0])
else:
    dir_str = "."

if options.regex:
    match_str = "-regex '%s' " % options.regex
else:
    match_str = "-name '%s' "  % options.pattern

if options.yes:
    action_str = "-print -delete"
else:
    action_str = "-ok rm '{}' ';'"

os.system("find %s %s %s" % (dir_str, match_str, action_str))