def add_subcommand_to_spa(
self, func, cmd_cls,
spa): # add subcommand parser to _SubParsersAction instance
assert spa.__class__ == _SubParsersAction
subcmd_name = self.utoh(func.__name__)
if subcmd_name in spa._name_parser_map:
raise CommandCollectionError('duplicate subcommand: %s' %
func.__name__)
add_arg_parsers = self.get_add_parsers(func, cmd_cls)
help = extract_help(func)
parser = spa.add_parser(
subcmd_name, # add parser for subcommand
prog=self._cmdparser.prog + ' ' + func.__name__,
formatter_class=self._cmdparser.formatter_class,
description=help.get('short', None),
parents=add_arg_parsers)
setattr(
parser, const.parser_func_attr,
func) # for creating option tree after arg parser has been created
self.add_args_to_parser(func, cmd_cls, parser)
return parser
def add_subcommand_to_spa(self, func, cmd_cls, spa): # add subcommand parser to _SubParsersAction instance
assert spa.__class__ == _SubParsersAction
subcmd_name = self.utoh(func.__name__)
if subcmd_name in spa._name_parser_map:
raise CommandCollectionError('duplicate subcommand: %s'%func.__name__)
add_arg_parsers = self.get_add_parsers(func, cmd_cls)
help = extract_help(func)
parser = spa.add_parser(subcmd_name, # add parser for subcommand
prog=self._cmdparser.prog + ' ' + func.__name__,
formatter_class=self._cmdparser.formatter_class,
description=help.get('short', None),
parents=add_arg_parsers)
setattr(parser, const.parser_func_attr, func) # for creating option tree after arg parser has been created
self.add_args_to_parser(func, cmd_cls, parser)
return parser
def add_args_to_parser(self, func, cmd_cls, parser, common=False, usn=['h']): # extract function argument information
help = extract_help(func) # and add them to parser,
# extract help and add it to parser
if common:
parser.common_args = Node('')
argspec = inspect.getargspec(func)
if cmd_cls is not None:
del argspec.args[0] # remove arg: self in case of a class method
if argspec.defaults is not None: # find the offset at which arguments with default values start
defaults_offset = len(argspec.args) - len(argspec.defaults)
else:
defaults_offset = len(argspec.args)
used_short_names = list(usn) # store used short names for arguments so as not to repeat them
for arg in argspec.args:
arg_index = argspec.args.index(arg)
default = names = choices = nargs = action = filter = None
hidden = False
if arg_index >= defaults_offset: # argument has a default value
arg_default = argspec.defaults[arg_index - defaults_offset]
def get_opt_arg_names(arg, short=None):
short = short or self.shorten_arg_name(arg, used_short_names)
used_short_names.append(short)
names = ['-' + short, '--' + arg]
return names
if arg_default.__class__ == Arg or issubclass(arg_default.__class__, Arg):
filter = make_filter(arg_default)
choices = arg_default.choices
default = arg_default.default
nargs = arg_default.nargs
hidden = arg_default.hidden
if arg_default.pos:
if default is not None:
nargs = '?'
names = [arg]
else:
names = get_opt_arg_names(arg, arg_default.short)
#if default is None or arg_default.pos:
# names = [arg] # positional argument
else:
names = get_opt_arg_names(arg)
default = arg_default
if type(default) == bool:
if default:
action = 'store_false'
else:
action = 'store_true'
default = None
else:
names = [arg] # positional argument
if action is None:
kwargs = {
'default' : default,
'choices' : choices,
'help' : help.get(arg, None)
}
if nargs is not None:
kwargs['nargs'] = nargs
else:
kwargs = {
'action' : action,
'help' : help.get(arg, None)
}
if len(names) == 1:
kwargs['metavar'] = self.utoh(names[0])
else:
names = [self.utoh(n) for n in names]
action = parser.add_argument(*names, **kwargs)
setattr(action, const.action_filter_attr, filter)
setattr(action, const.action_hidden_attr, hidden)
if not hidden:
if not common:
self.add_to_optiontree(names, default, choices, filter)
else:
parser.common_args.add_child(self.make_ot_node(names, default, choices, filter))
# end: for loop
longhelp = help.get('long', None)
if longhelp is not None and len(longhelp) > 0:
parser.set_extrahelp(longhelp)
if not common:
add_args = getattr(func, const.add_attr, None)
add_arg_funcs = add_args.args if add_args is not None else None
parser.set_defaults(cmd_func=CmdFunc(cmd_cls, func, add=add_arg_funcs)) # set class and function to be called for execution
def add_args_to_parser(self,
func,
cmd_cls,
parser,
common=False,
usn=['h']): # extract function argument information
help = extract_help(func) # and add them to parser,
# extract help and add it to parser
if common:
parser.common_args = Node('')
argspec = inspect.getargspec(func)
if cmd_cls is not None:
del argspec.args[0] # remove arg: self in case of a class method
if argspec.defaults is not None: # find the offset at which arguments with default values start
defaults_offset = len(argspec.args) - len(argspec.defaults)
else:
defaults_offset = len(argspec.args)
used_short_names = list(
usn
) # store used short names for arguments so as not to repeat them
for arg in argspec.args:
arg_index = argspec.args.index(arg)
default = names = choices = nargs = action = filter = None
hidden = False
if arg_index >= defaults_offset: # argument has a default value
arg_default = argspec.defaults[arg_index - defaults_offset]
def get_opt_arg_names(arg, short=None):
short = short or self.shorten_arg_name(
arg, used_short_names)
used_short_names.append(short)
names = ['-' + short, '--' + arg]
return names
if arg_default.__class__ == Arg or issubclass(
arg_default.__class__, Arg):
filter = make_filter(arg_default)
choices = arg_default.choices
default = arg_default.default
nargs = arg_default.nargs
hidden = arg_default.hidden
if arg_default.pos:
if default is not None:
nargs = '?'
names = [arg]
else:
names = get_opt_arg_names(arg, arg_default.short)
#if default is None or arg_default.pos:
# names = [arg] # positional argument
else:
names = get_opt_arg_names(arg)
default = arg_default
if type(default) == bool:
if default:
action = 'store_false'
else:
action = 'store_true'
default = None
else:
names = [arg] # positional argument
if action is None:
kwargs = {
'default': default,
'choices': choices,
'help': help.get(arg, None)
}
if nargs is not None:
kwargs['nargs'] = nargs
else:
kwargs = {'action': action, 'help': help.get(arg, None)}
if len(names) == 1:
kwargs['metavar'] = self.utoh(names[0])
else:
names = [self.utoh(n) for n in names]
action = parser.add_argument(*names, **kwargs)
setattr(action, const.action_filter_attr, filter)
setattr(action, const.action_hidden_attr, hidden)
if not hidden:
if not common:
self.add_to_optiontree(names, default, choices, filter)
else:
parser.common_args.add_child(
self.make_ot_node(names, default, choices, filter))
# end: for loop
longhelp = help.get('long', None)
if longhelp is not None and len(longhelp) > 0:
parser.set_extrahelp(longhelp)
if not common:
add_args = getattr(func, const.add_attr, None)
add_arg_funcs = add_args.args if add_args is not None else None
parser.set_defaults(
cmd_func=CmdFunc(cmd_cls, func, add=add_arg_funcs)
) # set class and function to be called for execution
