unbak

#!/usr/bin/env python3

import sys
import argparse
import shutil
import time
import os
import xattr

parser = argparse.ArgumentParser(description='Restore a file created by bak, this is the same as bak -u')
parser.add_argument('Source', help='bak file to restore')
args = parser.parse_args()
duplicate = int(1)

def checkdest(dest, duplicate):
    if os.path.exists(dest):
        if os.path.exists("%s(%s)" % (dest, duplicate)):
            duplicate += 1
            dest = checkdest(dest, duplicate)
        else:
            dest = "%s(%s)" % (dest, duplicate)
    return dest

def extrattr(source, setget, dest):
    msg = ''
    if setget == "set":
        try:
            xattr.setxattr(source.encode('utf-8'), "user.bak", dest.encode('utf-8'))
        except IOError as e:
            if not "Operation not supported" in e:
                msg = e
            else:
                msg = "Unbak not supported for this file.\n %s" % e
    elif setget == "get":
        try:
            dest = xattr.getxattr(source.encode('utf-8'), "user.bak")
        except IOError as e:
            if not "Operation not supported" in e:
                msg = e
            else:
                msg = "Unbak not supported for this file.\n %s" % e
    else:
        try:
            xattr.removexattr(source.encode('utf-8'), "user.bak")
        except IOError as e:
            if not "Operation not supported" in e:
                msg =  e
            else:
                msg = "Unbak not supported for this file.\n %s" % e
    return dest, msg

def main(args):
    source = args.Source
    arglist = list()


    if source[-1] == '/':
        source = source[:-1]

    dest, msg = extrattr(source, "get", '')
    if not msg == '':
        print(msg)
        sys.exit(1)
    if os.path.isfile(source):
        shutil.copy(source, dest)
    elif os.path.isdir(source):
        if os.path.isdir(dest):
            shutil.rmtree(dest)
        shutil.copytree(source, dest)
    else:
        print("%s does not exist" % source)
        sys.exit(1)
    sys.exit(0)

main(args)