def redispatch_short_arg(self, rest, ba, i):
"""Processes the rest of an argument as if it was a new one prefixed
with one dash.
For instance when ``-a`` is a flag in ``-abcd``, the object implementing
it will call this to proceed as if ``-a -bcd`` was passed."""
if not rest:
return
try:
nparam = ba.sig.aliases['-' + rest[0]]
except KeyError as e:
raise errors.UnknownOption(e.args[0])
orig_args = ba.in_args
ba.in_args = ba.in_args[:i] + ('-' + rest, ) + ba.in_args[i + 1:]
try:
nparam.read_argument(ba, i)
finally:
ba.in_args = orig_args
ba.unsatisfied.discard(nparam)
def process_arguments(self):
"""Process the arguments in `.in_args`, setting the `.func`,
`.post_name`, `.args` and `.kwargs` attributes as a result.
This methods reads `str`'s from `.in_args`. For each one, it finds the
relevant `Parameter` instance in `.posparam` or `.namedparam` and
delegates processing to it """
self.posparam = iter(self.sig.positional)
self.namedparams = dict(self.sig.aliases)
self.unsatisfied = set(self.sig.required)
self.not_provided = set(self.sig.optional)
self.sticky = None
self.posarg_only = False
self.skip = 0
with _SeekFallbackCommand():
for i, arg in enumerate(self.in_args):
if self.skip > 0:
self.skip -= 1
continue
with errors.SetArgumentErrorContext(pos=i, val=arg, ba=self):
if self.posarg_only or len(arg) < 2 or arg[0] != '-':
if self.sticky is not None:
param = self.sticky
else:
try:
param = next(self.posparam)
except StopIteration:
exc = errors.TooManyArguments(self.in_args[i:])
exc.__cause__ = None
raise exc
elif arg == '--':
self.posarg_only = True
continue
else:
if arg.startswith('--'):
name = arg.partition('=')[0]
else:
name = arg[:2]
try:
param = self.namedparams[name]
except KeyError:
raise errors.UnknownOption(name)
with errors.SetArgumentErrorContext(param=param):
param.read_argument(self, i)
param.apply_generic_flags(self)
if not self.func:
if self.unsatisfied:
unsatisfied = []
for p in self.unsatisfied:
with errors.SetArgumentErrorContext(param=p):
if p.unsatisfied(self):
unsatisfied.append(p)
if unsatisfied:
raise errors.MissingRequiredArguments(unsatisfied)
for p in self.sig.parameters.values():
p.post_parse(self)
del self.sticky, self.posarg_only, self.skip, self.unsatisfied, self.not_provided
def __init__(self, sig, args, name):
self.sig = sig
self.name = name
self.in_args = tuple(args)
self.func = None
self.post_name = []
self.args = []
self.kwargs = {}
self.meta = {}
self.posparam = iter(self.sig.positional)
self.sticky = None
self.posarg_only = False
self.skip = 0
self.unsatisfied = set(self.sig.required)
with _SeekFallbackCommand():
for i, arg in enumerate(self.in_args):
if self.skip > 0:
self.skip -= 1
continue
with errors.SetArgumentErrorContext(pos=i, val=arg, ba=self):
if self.posarg_only or len(arg) < 2 or arg[0] != '-':
if self.sticky is not None:
param = self.sticky
else:
try:
param = next(self.posparam)
except StopIteration:
exc = errors.TooManyArguments(self.in_args[i:])
exc.__cause__ = None
raise exc
elif arg == '--':
self.posarg_only = True
continue
else:
if arg.startswith('--'):
name = arg.partition('=')[0]
else:
name = arg[:2]
try:
param = self.sig.aliases[name]
except KeyError:
raise errors.UnknownOption(name)
with errors.SetArgumentErrorContext(param=param):
param.read_argument(self, i)
param.apply_generic_flags(self)
if not self.func:
if self.unsatisfied:
unsatisfied = []
for p in self.unsatisfied:
with errors.SetArgumentErrorContext(param=p):
if p.unsatisfied(self):
unsatisfied.append(p)
if unsatisfied:
raise errors.MissingRequiredArguments(unsatisfied)
for p in self.sig.parameters.values():
p.post_parse(self)
del self.sticky, self.posarg_only, self.skip, self.unsatisfied
