+ # optparse is deprecated since Python 3.2. So assume a stable interface even for private methods
+ ALIAS_DEST = '_triggered_aliases'
+ ALIAS_TRIGGER_LIMIT = 100
+
+ def __init__(self):
+ super().__init__(
+ prog='yt-dlp' if detect_variant() == 'source' else None,
+ version=__version__,
+ usage='%prog [OPTIONS] URL [URL...]',
+ epilog='See full documentation at https://github.com/yt-dlp/yt-dlp#readme',
+ formatter=_YoutubeDLHelpFormatter(),
+ conflict_handler='resolve',
+ )
+ self.set_default(self.ALIAS_DEST, collections.defaultdict(int))
+
+ _UNKNOWN_OPTION = (optparse.BadOptionError, optparse.AmbiguousOptionError)
+ _BAD_OPTION = optparse.OptionValueError
+
+ def parse_known_args(self, args=None, values=None, strict=True):
+ """Same as parse_args, but ignore unknown switches. Similar to argparse.parse_known_args"""
+ self.rargs, self.largs = self._get_args(args), []
+ self.values = values or self.get_default_values()
+ while self.rargs:
+ arg = self.rargs[0]
+ try:
+ if arg == '--':
+ del self.rargs[0]
+ break
+ elif arg.startswith('--'):
+ self._process_long_opt(self.rargs, self.values)
+ elif arg.startswith('-') and arg != '-':
+ self._process_short_opts(self.rargs, self.values)
+ elif self.allow_interspersed_args:
+ self.largs.append(self.rargs.pop(0))
+ else:
+ break
+ except optparse.OptParseError as err:
+ if isinstance(err, self._UNKNOWN_OPTION):
+ self.largs.append(err.opt_str)
+ elif strict:
+ if isinstance(err, self._BAD_OPTION):
+ self.error(str(err))
+ raise
+ return self.check_values(self.values, self.largs)
+
+ def _generate_error_message(self, msg):
+ msg = f'{self.get_prog_name()}: error: {str(msg).strip()}\n'
+ return f'{self.get_usage()}\n{msg}' if self.usage else msg
+
+ def error(self, msg):
+ raise optparse.OptParseError(self._generate_error_message(msg))
+
+ def _get_args(self, args):
+ return sys.argv[1:] if args is None else list(args)