mirror of
https://github.com/python/cpython.git
synced 2024-12-05 07:43:50 +08:00
1400 lines
50 KiB
Python
1400 lines
50 KiB
Python
"""optparse - a powerful, extensible, and easy-to-use option parser.
|
|
|
|
By Greg Ward <gward@python.net>
|
|
|
|
Originally distributed as Optik; see http://optik.sourceforge.net/ .
|
|
|
|
If you have problems with this module, please do not file bugs,
|
|
patches, or feature requests with Python; instead, use Optik's
|
|
SourceForge project page:
|
|
http://sourceforge.net/projects/optik
|
|
|
|
For support, use the optik-users@lists.sourceforge.net mailing list
|
|
(http://lists.sourceforge.net/lists/listinfo/optik-users).
|
|
"""
|
|
|
|
# Python developers: please do not make changes to this file, since
|
|
# it is automatically generated from the Optik source code.
|
|
|
|
__version__ = "1.4.1+"
|
|
|
|
__all__ = ['Option',
|
|
'SUPPRESS_HELP',
|
|
'SUPPRESS_USAGE',
|
|
'STD_HELP_OPTION',
|
|
'STD_VERSION_OPTION',
|
|
'Values',
|
|
'OptionContainer',
|
|
'OptionGroup',
|
|
'OptionParser',
|
|
'HelpFormatter',
|
|
'IndentedHelpFormatter',
|
|
'TitledHelpFormatter',
|
|
'OptParseError',
|
|
'OptionError',
|
|
'OptionConflictError',
|
|
'OptionValueError',
|
|
'BadOptionError']
|
|
|
|
__copyright__ = """
|
|
Copyright (c) 2001-2003 Gregory P. Ward. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are
|
|
met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
"""
|
|
|
|
import sys, os
|
|
import types
|
|
import textwrap
|
|
|
|
class OptParseError (Exception):
|
|
def __init__ (self, msg):
|
|
self.msg = msg
|
|
|
|
def __str__ (self):
|
|
return self.msg
|
|
|
|
|
|
class OptionError (OptParseError):
|
|
"""
|
|
Raised if an Option instance is created with invalid or
|
|
inconsistent arguments.
|
|
"""
|
|
|
|
def __init__ (self, msg, option):
|
|
self.msg = msg
|
|
self.option_id = str(option)
|
|
|
|
def __str__ (self):
|
|
if self.option_id:
|
|
return "option %s: %s" % (self.option_id, self.msg)
|
|
else:
|
|
return self.msg
|
|
|
|
class OptionConflictError (OptionError):
|
|
"""
|
|
Raised if conflicting options are added to an OptionParser.
|
|
"""
|
|
|
|
class OptionValueError (OptParseError):
|
|
"""
|
|
Raised if an invalid option value is encountered on the command
|
|
line.
|
|
"""
|
|
|
|
class BadOptionError (OptParseError):
|
|
"""
|
|
Raised if an invalid or ambiguous option is seen on the command-line.
|
|
"""
|
|
|
|
|
|
class HelpFormatter:
|
|
|
|
"""
|
|
Abstract base class for formatting option help. OptionParser
|
|
instances should use one of the HelpFormatter subclasses for
|
|
formatting help; by default IndentedHelpFormatter is used.
|
|
|
|
Instance attributes:
|
|
indent_increment : int
|
|
the number of columns to indent per nesting level
|
|
max_help_position : int
|
|
the maximum starting column for option help text
|
|
help_position : int
|
|
the calculated starting column for option help text;
|
|
initially the same as the maximum
|
|
width : int
|
|
total number of columns for output
|
|
level : int
|
|
current indentation level
|
|
current_indent : int
|
|
current indentation level (in columns)
|
|
help_width : int
|
|
number of columns available for option help text (calculated)
|
|
"""
|
|
|
|
def __init__ (self,
|
|
indent_increment,
|
|
max_help_position,
|
|
width,
|
|
short_first):
|
|
self.indent_increment = indent_increment
|
|
self.help_position = self.max_help_position = max_help_position
|
|
self.width = width
|
|
self.current_indent = 0
|
|
self.level = 0
|
|
self.help_width = width - max_help_position
|
|
self.short_first = short_first
|
|
|
|
def indent (self):
|
|
self.current_indent += self.indent_increment
|
|
self.level += 1
|
|
|
|
def dedent (self):
|
|
self.current_indent -= self.indent_increment
|
|
assert self.current_indent >= 0, "Indent decreased below 0."
|
|
self.level -= 1
|
|
|
|
def format_usage (self, usage):
|
|
raise NotImplementedError, "subclasses must implement"
|
|
|
|
def format_heading (self, heading):
|
|
raise NotImplementedError, "subclasses must implement"
|
|
|
|
def format_description (self, description):
|
|
desc_width = self.width - self.current_indent
|
|
indent = " "*self.current_indent
|
|
return textwrap.fill(description, desc_width,
|
|
initial_indent=indent,
|
|
subsequent_indent=indent)
|
|
|
|
def format_option (self, option):
|
|
# The help for each option consists of two parts:
|
|
# * the opt strings and metavars
|
|
# eg. ("-x", or "-fFILENAME, --file=FILENAME")
|
|
# * the user-supplied help string
|
|
# eg. ("turn on expert mode", "read data from FILENAME")
|
|
#
|
|
# If possible, we write both of these on the same line:
|
|
# -x turn on expert mode
|
|
#
|
|
# But if the opt string list is too long, we put the help
|
|
# string on a second line, indented to the same column it would
|
|
# start in if it fit on the first line.
|
|
# -fFILENAME, --file=FILENAME
|
|
# read data from FILENAME
|
|
result = []
|
|
opts = option.option_strings
|
|
opt_width = self.help_position - self.current_indent - 2
|
|
if len(opts) > opt_width:
|
|
opts = "%*s%s\n" % (self.current_indent, "", opts)
|
|
indent_first = self.help_position
|
|
else: # start help on same line as opts
|
|
opts = "%*s%-*s " % (self.current_indent, "", opt_width, opts)
|
|
indent_first = 0
|
|
result.append(opts)
|
|
if option.help:
|
|
help_lines = textwrap.wrap(option.help, self.help_width)
|
|
result.append("%*s%s\n" % (indent_first, "", help_lines[0]))
|
|
result.extend(["%*s%s\n" % (self.help_position, "", line)
|
|
for line in help_lines[1:]])
|
|
elif opts[-1] != "\n":
|
|
result.append("\n")
|
|
return "".join(result)
|
|
|
|
def store_option_strings (self, parser):
|
|
self.indent()
|
|
max_len = 0
|
|
for opt in parser.option_list:
|
|
strings = self.format_option_strings(opt)
|
|
opt.option_strings = strings
|
|
max_len = max(max_len, len(strings) + self.current_indent)
|
|
self.indent()
|
|
for group in parser.option_groups:
|
|
for opt in group.option_list:
|
|
strings = self.format_option_strings(opt)
|
|
opt.option_strings = strings
|
|
max_len = max(max_len, len(strings) + self.current_indent)
|
|
self.dedent()
|
|
self.dedent()
|
|
self.help_position = min(max_len + 2, self.max_help_position)
|
|
|
|
def format_option_strings (self, option):
|
|
"""Return a comma-separated list of option strings & metavariables."""
|
|
if option.takes_value():
|
|
metavar = option.metavar or option.dest.upper()
|
|
short_opts = [sopt + metavar for sopt in option._short_opts]
|
|
long_opts = [lopt + "=" + metavar for lopt in option._long_opts]
|
|
else:
|
|
short_opts = option._short_opts
|
|
long_opts = option._long_opts
|
|
|
|
if self.short_first:
|
|
opts = short_opts + long_opts
|
|
else:
|
|
opts = long_opts + short_opts
|
|
|
|
return ", ".join(opts)
|
|
|
|
class IndentedHelpFormatter (HelpFormatter):
|
|
"""Format help with indented section bodies.
|
|
"""
|
|
|
|
def __init__ (self,
|
|
indent_increment=2,
|
|
max_help_position=24,
|
|
width=80,
|
|
short_first=1):
|
|
HelpFormatter.__init__(
|
|
self, indent_increment, max_help_position, width, short_first)
|
|
|
|
def format_usage (self, usage):
|
|
return "usage: %s\n" % usage
|
|
|
|
def format_heading (self, heading):
|
|
return "%*s%s:\n" % (self.current_indent, "", heading)
|
|
|
|
|
|
class TitledHelpFormatter (HelpFormatter):
|
|
"""Format help with underlined section headers.
|
|
"""
|
|
|
|
def __init__ (self,
|
|
indent_increment=0,
|
|
max_help_position=24,
|
|
width=80,
|
|
short_first=0):
|
|
HelpFormatter.__init__ (
|
|
self, indent_increment, max_help_position, width, short_first)
|
|
|
|
def format_usage (self, usage):
|
|
return "%s %s\n" % (self.format_heading("Usage"), usage)
|
|
|
|
def format_heading (self, heading):
|
|
return "%s\n%s\n" % (heading, "=-"[self.level] * len(heading))
|
|
|
|
|
|
_builtin_cvt = { "int" : (int, "integer"),
|
|
"long" : (long, "long integer"),
|
|
"float" : (float, "floating-point"),
|
|
"complex" : (complex, "complex") }
|
|
|
|
def check_builtin (option, opt, value):
|
|
(cvt, what) = _builtin_cvt[option.type]
|
|
try:
|
|
return cvt(value)
|
|
except ValueError:
|
|
raise OptionValueError(
|
|
#"%s: invalid %s argument %r" % (opt, what, value))
|
|
"option %s: invalid %s value: %r" % (opt, what, value))
|
|
|
|
def check_choice(option, opt, value):
|
|
if value in option.choices:
|
|
return value
|
|
else:
|
|
choices = ", ".join(map(repr, option.choices))
|
|
raise OptionValueError(
|
|
"option %s: invalid choice: %r (choose from %s)"
|
|
% (opt, value, choices))
|
|
|
|
# Not supplying a default is different from a default of None,
|
|
# so we need an explicit "not supplied" value.
|
|
NO_DEFAULT = "NO"+"DEFAULT"
|
|
|
|
|
|
class Option:
|
|
"""
|
|
Instance attributes:
|
|
_short_opts : [string]
|
|
_long_opts : [string]
|
|
|
|
action : string
|
|
type : string
|
|
dest : string
|
|
default : any
|
|
nargs : int
|
|
const : any
|
|
choices : [string]
|
|
callback : function
|
|
callback_args : (any*)
|
|
callback_kwargs : { string : any }
|
|
help : string
|
|
metavar : string
|
|
"""
|
|
|
|
# The list of instance attributes that may be set through
|
|
# keyword args to the constructor.
|
|
ATTRS = ['action',
|
|
'type',
|
|
'dest',
|
|
'default',
|
|
'nargs',
|
|
'const',
|
|
'choices',
|
|
'callback',
|
|
'callback_args',
|
|
'callback_kwargs',
|
|
'help',
|
|
'metavar']
|
|
|
|
# The set of actions allowed by option parsers. Explicitly listed
|
|
# here so the constructor can validate its arguments.
|
|
ACTIONS = ("store",
|
|
"store_const",
|
|
"store_true",
|
|
"store_false",
|
|
"append",
|
|
"count",
|
|
"callback",
|
|
"help",
|
|
"version")
|
|
|
|
# The set of actions that involve storing a value somewhere;
|
|
# also listed just for constructor argument validation. (If
|
|
# the action is one of these, there must be a destination.)
|
|
STORE_ACTIONS = ("store",
|
|
"store_const",
|
|
"store_true",
|
|
"store_false",
|
|
"append",
|
|
"count")
|
|
|
|
# The set of actions for which it makes sense to supply a value
|
|
# type, ie. where we expect an argument to this option.
|
|
TYPED_ACTIONS = ("store",
|
|
"append",
|
|
"callback")
|
|
|
|
# The set of known types for option parsers. Again, listed here for
|
|
# constructor argument validation.
|
|
TYPES = ("string", "int", "long", "float", "complex", "choice")
|
|
|
|
# Dictionary of argument checking functions, which convert and
|
|
# validate option arguments according to the option type.
|
|
#
|
|
# Signature of checking functions is:
|
|
# check(option : Option, opt : string, value : string) -> any
|
|
# where
|
|
# option is the Option instance calling the checker
|
|
# opt is the actual option seen on the command-line
|
|
# (eg. "-a", "--file")
|
|
# value is the option argument seen on the command-line
|
|
#
|
|
# The return value should be in the appropriate Python type
|
|
# for option.type -- eg. an integer if option.type == "int".
|
|
#
|
|
# If no checker is defined for a type, arguments will be
|
|
# unchecked and remain strings.
|
|
TYPE_CHECKER = { "int" : check_builtin,
|
|
"long" : check_builtin,
|
|
"float" : check_builtin,
|
|
"complex" : check_builtin,
|
|
"choice" : check_choice,
|
|
}
|
|
|
|
|
|
# CHECK_METHODS is a list of unbound method objects; they are called
|
|
# by the constructor, in order, after all attributes are
|
|
# initialized. The list is created and filled in later, after all
|
|
# the methods are actually defined. (I just put it here because I
|
|
# like to define and document all class attributes in the same
|
|
# place.) Subclasses that add another _check_*() method should
|
|
# define their own CHECK_METHODS list that adds their check method
|
|
# to those from this class.
|
|
CHECK_METHODS = None
|
|
|
|
|
|
# -- Constructor/initialization methods ----------------------------
|
|
|
|
def __init__ (self, *opts, **attrs):
|
|
# Set _short_opts, _long_opts attrs from 'opts' tuple.
|
|
# Have to be set now, in case no option strings are supplied.
|
|
self._short_opts = []
|
|
self._long_opts = []
|
|
opts = self._check_opt_strings(opts)
|
|
self._set_opt_strings(opts)
|
|
|
|
# Set all other attrs (action, type, etc.) from 'attrs' dict
|
|
self._set_attrs(attrs)
|
|
|
|
# Check all the attributes we just set. There are lots of
|
|
# complicated interdependencies, but luckily they can be farmed
|
|
# out to the _check_*() methods listed in CHECK_METHODS -- which
|
|
# could be handy for subclasses! The one thing these all share
|
|
# is that they raise OptionError if they discover a problem.
|
|
for checker in self.CHECK_METHODS:
|
|
checker(self)
|
|
|
|
def _check_opt_strings (self, opts):
|
|
# Filter out None because early versions of Optik had exactly
|
|
# one short option and one long option, either of which
|
|
# could be None.
|
|
opts = filter(None, opts)
|
|
if not opts:
|
|
raise TypeError("at least one option string must be supplied")
|
|
return opts
|
|
|
|
def _set_opt_strings (self, opts):
|
|
for opt in opts:
|
|
if len(opt) < 2:
|
|
raise OptionError(
|
|
"invalid option string %r: "
|
|
"must be at least two characters long" % opt, self)
|
|
elif len(opt) == 2:
|
|
if not (opt[0] == "-" and opt[1] != "-"):
|
|
raise OptionError(
|
|
"invalid short option string %r: "
|
|
"must be of the form -x, (x any non-dash char)" % opt,
|
|
self)
|
|
self._short_opts.append(opt)
|
|
else:
|
|
if not (opt[0:2] == "--" and opt[2] != "-"):
|
|
raise OptionError(
|
|
"invalid long option string %r: "
|
|
"must start with --, followed by non-dash" % opt,
|
|
self)
|
|
self._long_opts.append(opt)
|
|
|
|
def _set_attrs (self, attrs):
|
|
for attr in self.ATTRS:
|
|
if attrs.has_key(attr):
|
|
setattr(self, attr, attrs[attr])
|
|
del attrs[attr]
|
|
else:
|
|
if attr == 'default':
|
|
setattr(self, attr, NO_DEFAULT)
|
|
else:
|
|
setattr(self, attr, None)
|
|
if attrs:
|
|
raise OptionError(
|
|
"invalid keyword arguments: %s" % ", ".join(attrs.keys()),
|
|
self)
|
|
|
|
|
|
# -- Constructor validation methods --------------------------------
|
|
|
|
def _check_action (self):
|
|
if self.action is None:
|
|
self.action = "store"
|
|
elif self.action not in self.ACTIONS:
|
|
raise OptionError("invalid action: %r" % self.action, self)
|
|
|
|
def _check_type (self):
|
|
if self.type is None:
|
|
# XXX should factor out another class attr here: list of
|
|
# actions that *require* a type
|
|
if self.action in ("store", "append"):
|
|
if self.choices is not None:
|
|
# The "choices" attribute implies "choice" type.
|
|
self.type = "choice"
|
|
else:
|
|
# No type given? "string" is the most sensible default.
|
|
self.type = "string"
|
|
else:
|
|
if self.type not in self.TYPES:
|
|
raise OptionError("invalid option type: %r" % self.type, self)
|
|
if self.action not in self.TYPED_ACTIONS:
|
|
raise OptionError(
|
|
"must not supply a type for action %r" % self.action, self)
|
|
|
|
def _check_choice(self):
|
|
if self.type == "choice":
|
|
if self.choices is None:
|
|
raise OptionError(
|
|
"must supply a list of choices for type 'choice'", self)
|
|
elif type(self.choices) not in (types.TupleType, types.ListType):
|
|
raise OptionError(
|
|
"choices must be a list of strings ('%s' supplied)"
|
|
% str(type(self.choices)).split("'")[1], self)
|
|
elif self.choices is not None:
|
|
raise OptionError(
|
|
"must not supply choices for type %r" % self.type, self)
|
|
|
|
def _check_dest (self):
|
|
if self.action in self.STORE_ACTIONS and self.dest is None:
|
|
# No destination given, and we need one for this action.
|
|
# Glean a destination from the first long option string,
|
|
# or from the first short option string if no long options.
|
|
if self._long_opts:
|
|
# eg. "--foo-bar" -> "foo_bar"
|
|
self.dest = self._long_opts[0][2:].replace('-', '_')
|
|
else:
|
|
self.dest = self._short_opts[0][1]
|
|
|
|
def _check_const (self):
|
|
if self.action != "store_const" and self.const is not None:
|
|
raise OptionError(
|
|
"'const' must not be supplied for action %r" % self.action,
|
|
self)
|
|
|
|
def _check_nargs (self):
|
|
if self.action in self.TYPED_ACTIONS:
|
|
if self.nargs is None:
|
|
self.nargs = 1
|
|
elif self.nargs is not None:
|
|
raise OptionError(
|
|
"'nargs' must not be supplied for action %r" % self.action,
|
|
self)
|
|
|
|
def _check_callback (self):
|
|
if self.action == "callback":
|
|
if not callable(self.callback):
|
|
raise OptionError(
|
|
"callback not callable: %r" % self.callback, self)
|
|
if (self.callback_args is not None and
|
|
type(self.callback_args) is not types.TupleType):
|
|
raise OptionError(
|
|
"callback_args, if supplied, must be a tuple: not %r"
|
|
% self.callback_args, self)
|
|
if (self.callback_kwargs is not None and
|
|
type(self.callback_kwargs) is not types.DictType):
|
|
raise OptionError(
|
|
"callback_kwargs, if supplied, must be a dict: not %r"
|
|
% self.callback_kwargs, self)
|
|
else:
|
|
if self.callback is not None:
|
|
raise OptionError(
|
|
"callback supplied (%r) for non-callback option"
|
|
% self.callback, self)
|
|
if self.callback_args is not None:
|
|
raise OptionError(
|
|
"callback_args supplied for non-callback option", self)
|
|
if self.callback_kwargs is not None:
|
|
raise OptionError(
|
|
"callback_kwargs supplied for non-callback option", self)
|
|
|
|
|
|
CHECK_METHODS = [_check_action,
|
|
_check_type,
|
|
_check_choice,
|
|
_check_dest,
|
|
_check_const,
|
|
_check_nargs,
|
|
_check_callback]
|
|
|
|
|
|
# -- Miscellaneous methods -----------------------------------------
|
|
|
|
def __str__ (self):
|
|
return "/".join(self._short_opts + self._long_opts)
|
|
|
|
def takes_value (self):
|
|
return self.type is not None
|
|
|
|
|
|
# -- Processing methods --------------------------------------------
|
|
|
|
def check_value (self, opt, value):
|
|
checker = self.TYPE_CHECKER.get(self.type)
|
|
if checker is None:
|
|
return value
|
|
else:
|
|
return checker(self, opt, value)
|
|
|
|
def process (self, opt, value, values, parser):
|
|
|
|
# First, convert the value(s) to the right type. Howl if any
|
|
# value(s) are bogus.
|
|
if value is not None:
|
|
if self.nargs == 1:
|
|
value = self.check_value(opt, value)
|
|
else:
|
|
value = tuple([self.check_value(opt, v) for v in value])
|
|
|
|
# And then take whatever action is expected of us.
|
|
# This is a separate method to make life easier for
|
|
# subclasses to add new actions.
|
|
return self.take_action(
|
|
self.action, self.dest, opt, value, values, parser)
|
|
|
|
def take_action (self, action, dest, opt, value, values, parser):
|
|
if action == "store":
|
|
setattr(values, dest, value)
|
|
elif action == "store_const":
|
|
setattr(values, dest, self.const)
|
|
elif action == "store_true":
|
|
setattr(values, dest, True)
|
|
elif action == "store_false":
|
|
setattr(values, dest, False)
|
|
elif action == "append":
|
|
values.ensure_value(dest, []).append(value)
|
|
elif action == "count":
|
|
setattr(values, dest, values.ensure_value(dest, 0) + 1)
|
|
elif action == "callback":
|
|
args = self.callback_args or ()
|
|
kwargs = self.callback_kwargs or {}
|
|
self.callback(self, opt, value, parser, *args, **kwargs)
|
|
elif action == "help":
|
|
parser.print_help()
|
|
sys.exit(0)
|
|
elif action == "version":
|
|
parser.print_version()
|
|
sys.exit(0)
|
|
else:
|
|
raise RuntimeError, "unknown action %r" % self.action
|
|
|
|
return 1
|
|
|
|
# class Option
|
|
|
|
|
|
def get_prog_name ():
|
|
return os.path.basename(sys.argv[0])
|
|
|
|
|
|
SUPPRESS_HELP = "SUPPRESS"+"HELP"
|
|
SUPPRESS_USAGE = "SUPPRESS"+"USAGE"
|
|
|
|
STD_HELP_OPTION = Option("-h", "--help",
|
|
action="help",
|
|
help="show this help message and exit")
|
|
STD_VERSION_OPTION = Option("--version",
|
|
action="version",
|
|
help="show program's version number and exit")
|
|
|
|
|
|
class Values:
|
|
|
|
def __init__ (self, defaults=None):
|
|
if defaults:
|
|
for (attr, val) in defaults.items():
|
|
setattr(self, attr, val)
|
|
|
|
def __repr__ (self):
|
|
return ("<%s at 0x%x: %r>"
|
|
% (self.__class__.__name__, id(self), self.__dict__))
|
|
|
|
def _update_careful (self, dict):
|
|
"""
|
|
Update the option values from an arbitrary dictionary, but only
|
|
use keys from dict that already have a corresponding attribute
|
|
in self. Any keys in dict without a corresponding attribute
|
|
are silently ignored.
|
|
"""
|
|
for attr in dir(self):
|
|
if dict.has_key(attr):
|
|
dval = dict[attr]
|
|
if dval is not None:
|
|
setattr(self, attr, dval)
|
|
|
|
def _update_loose (self, dict):
|
|
"""
|
|
Update the option values from an arbitrary dictionary,
|
|
using all keys from the dictionary regardless of whether
|
|
they have a corresponding attribute in self or not.
|
|
"""
|
|
self.__dict__.update(dict)
|
|
|
|
def _update (self, dict, mode):
|
|
if mode == "careful":
|
|
self._update_careful(dict)
|
|
elif mode == "loose":
|
|
self._update_loose(dict)
|
|
else:
|
|
raise ValueError, "invalid update mode: %r" % mode
|
|
|
|
def read_module (self, modname, mode="careful"):
|
|
__import__(modname)
|
|
mod = sys.modules[modname]
|
|
self._update(vars(mod), mode)
|
|
|
|
def read_file (self, filename, mode="careful"):
|
|
vars = {}
|
|
execfile(filename, vars)
|
|
self._update(vars, mode)
|
|
|
|
def ensure_value (self, attr, value):
|
|
if not hasattr(self, attr) or getattr(self, attr) is None:
|
|
setattr(self, attr, value)
|
|
return getattr(self, attr)
|
|
|
|
|
|
class OptionContainer:
|
|
|
|
"""
|
|
Abstract base class.
|
|
|
|
Class attributes:
|
|
standard_option_list : [Option]
|
|
list of standard options that will be accepted by all instances
|
|
of this parser class (intended to be overridden by subclasses).
|
|
|
|
Instance attributes:
|
|
option_list : [Option]
|
|
the list of Option objects contained by this OptionContainer
|
|
_short_opt : { string : Option }
|
|
dictionary mapping short option strings, eg. "-f" or "-X",
|
|
to the Option instances that implement them. If an Option
|
|
has multiple short option strings, it will appears in this
|
|
dictionary multiple times. [1]
|
|
_long_opt : { string : Option }
|
|
dictionary mapping long option strings, eg. "--file" or
|
|
"--exclude", to the Option instances that implement them.
|
|
Again, a given Option can occur multiple times in this
|
|
dictionary. [1]
|
|
defaults : { string : any }
|
|
dictionary mapping option destination names to default
|
|
values for each destination [1]
|
|
|
|
[1] These mappings are common to (shared by) all components of the
|
|
controlling OptionParser, where they are initially created.
|
|
|
|
"""
|
|
|
|
def __init__ (self, option_class, conflict_handler, description):
|
|
# Initialize the option list and related data structures.
|
|
# This method must be provided by subclasses, and it must
|
|
# initialize at least the following instance attributes:
|
|
# option_list, _short_opt, _long_opt, defaults.
|
|
self._create_option_list()
|
|
|
|
self.option_class = option_class
|
|
self.set_conflict_handler(conflict_handler)
|
|
self.set_description(description)
|
|
|
|
def _create_option_mappings (self):
|
|
# For use by OptionParser constructor -- create the master
|
|
# option mappings used by this OptionParser and all
|
|
# OptionGroups that it owns.
|
|
self._short_opt = {} # single letter -> Option instance
|
|
self._long_opt = {} # long option -> Option instance
|
|
self.defaults = {} # maps option dest -> default value
|
|
|
|
|
|
def _share_option_mappings (self, parser):
|
|
# For use by OptionGroup constructor -- use shared option
|
|
# mappings from the OptionParser that owns this OptionGroup.
|
|
self._short_opt = parser._short_opt
|
|
self._long_opt = parser._long_opt
|
|
self.defaults = parser.defaults
|
|
|
|
def set_conflict_handler (self, handler):
|
|
if handler not in ("ignore", "error", "resolve"):
|
|
raise ValueError, "invalid conflict_resolution value %r" % handler
|
|
self.conflict_handler = handler
|
|
|
|
def set_description (self, description):
|
|
self.description = description
|
|
|
|
|
|
# -- Option-adding methods -----------------------------------------
|
|
|
|
def _check_conflict (self, option):
|
|
conflict_opts = []
|
|
for opt in option._short_opts:
|
|
if self._short_opt.has_key(opt):
|
|
conflict_opts.append((opt, self._short_opt[opt]))
|
|
for opt in option._long_opts:
|
|
if self._long_opt.has_key(opt):
|
|
conflict_opts.append((opt, self._long_opt[opt]))
|
|
|
|
if conflict_opts:
|
|
handler = self.conflict_handler
|
|
if handler == "ignore": # behaviour for Optik 1.0, 1.1
|
|
pass
|
|
elif handler == "error": # new in 1.2
|
|
raise OptionConflictError(
|
|
"conflicting option string(s): %s"
|
|
% ", ".join([co[0] for co in conflict_opts]),
|
|
option)
|
|
elif handler == "resolve": # new in 1.2
|
|
for (opt, c_option) in conflict_opts:
|
|
if opt.startswith("--"):
|
|
c_option._long_opts.remove(opt)
|
|
del self._long_opt[opt]
|
|
else:
|
|
c_option._short_opts.remove(opt)
|
|
del self._short_opt[opt]
|
|
if not (c_option._short_opts or c_option._long_opts):
|
|
c_option.container.option_list.remove(c_option)
|
|
|
|
def add_option (self, *args, **kwargs):
|
|
"""add_option(Option)
|
|
add_option(opt_str, ..., kwarg=val, ...)
|
|
"""
|
|
if type(args[0]) is types.StringType:
|
|
option = self.option_class(*args, **kwargs)
|
|
elif len(args) == 1 and not kwargs:
|
|
option = args[0]
|
|
if not isinstance(option, Option):
|
|
raise TypeError, "not an Option instance: %r" % option
|
|
else:
|
|
raise TypeError, "invalid arguments"
|
|
|
|
self._check_conflict(option)
|
|
|
|
self.option_list.append(option)
|
|
option.container = self
|
|
for opt in option._short_opts:
|
|
self._short_opt[opt] = option
|
|
for opt in option._long_opts:
|
|
self._long_opt[opt] = option
|
|
|
|
if option.dest is not None: # option has a dest, we need a default
|
|
if option.default is not NO_DEFAULT:
|
|
self.defaults[option.dest] = option.default
|
|
elif not self.defaults.has_key(option.dest):
|
|
self.defaults[option.dest] = None
|
|
|
|
return option
|
|
|
|
def add_options (self, option_list):
|
|
for option in option_list:
|
|
self.add_option(option)
|
|
|
|
# -- Option query/removal methods ----------------------------------
|
|
|
|
def get_option (self, opt_str):
|
|
return (self._short_opt.get(opt_str) or
|
|
self._long_opt.get(opt_str))
|
|
|
|
def has_option (self, opt_str):
|
|
return (self._short_opt.has_key(opt_str) or
|
|
self._long_opt.has_key(opt_str))
|
|
|
|
def remove_option (self, opt_str):
|
|
option = self._short_opt.get(opt_str)
|
|
if option is None:
|
|
option = self._long_opt.get(opt_str)
|
|
if option is None:
|
|
raise ValueError("no such option %r" % opt_str)
|
|
|
|
for opt in option._short_opts:
|
|
del self._short_opt[opt]
|
|
for opt in option._long_opts:
|
|
del self._long_opt[opt]
|
|
option.container.option_list.remove(option)
|
|
|
|
|
|
# -- Help-formatting methods ---------------------------------------
|
|
|
|
def format_option_help (self, formatter):
|
|
if not self.option_list:
|
|
return ""
|
|
result = []
|
|
for option in self.option_list:
|
|
if not option.help is SUPPRESS_HELP:
|
|
result.append(formatter.format_option(option))
|
|
return "".join(result)
|
|
|
|
def format_description (self, formatter):
|
|
if self.description:
|
|
return formatter.format_description(self.description)
|
|
else:
|
|
return ""
|
|
|
|
def format_help (self, formatter):
|
|
if self.description:
|
|
desc = self.format_description(formatter) + "\n"
|
|
else:
|
|
desc = ""
|
|
return desc + self.format_option_help(formatter)
|
|
|
|
|
|
class OptionGroup (OptionContainer):
|
|
|
|
def __init__ (self, parser, title, description=None):
|
|
self.parser = parser
|
|
OptionContainer.__init__(
|
|
self, parser.option_class, parser.conflict_handler, description)
|
|
self.title = title
|
|
|
|
def _create_option_list (self):
|
|
self.option_list = []
|
|
self._share_option_mappings(self.parser)
|
|
|
|
def set_title (self, title):
|
|
self.title = title
|
|
|
|
# -- Help-formatting methods ---------------------------------------
|
|
|
|
def format_help (self, formatter):
|
|
result = formatter.format_heading(self.title)
|
|
formatter.indent()
|
|
result += OptionContainer.format_help(self, formatter)
|
|
formatter.dedent()
|
|
return result
|
|
|
|
|
|
class OptionParser (OptionContainer):
|
|
|
|
"""
|
|
Class attributes:
|
|
standard_option_list : [Option]
|
|
list of standard options that will be accepted by all instances
|
|
of this parser class (intended to be overridden by subclasses).
|
|
|
|
Instance attributes:
|
|
usage : string
|
|
a usage string for your program. Before it is displayed
|
|
to the user, "%prog" will be expanded to the name of
|
|
your program (self.prog or os.path.basename(sys.argv[0])).
|
|
prog : string
|
|
the name of the current program (to override
|
|
os.path.basename(sys.argv[0])).
|
|
|
|
allow_interspersed_args : boolean = true
|
|
if true, positional arguments may be interspersed with options.
|
|
Assuming -a and -b each take a single argument, the command-line
|
|
-ablah foo bar -bboo baz
|
|
will be interpreted the same as
|
|
-ablah -bboo -- foo bar baz
|
|
If this flag were false, that command line would be interpreted as
|
|
-ablah -- foo bar -bboo baz
|
|
-- ie. we stop processing options as soon as we see the first
|
|
non-option argument. (This is the tradition followed by
|
|
Python's getopt module, Perl's Getopt::Std, and other argument-
|
|
parsing libraries, but it is generally annoying to users.)
|
|
|
|
rargs : [string]
|
|
the argument list currently being parsed. Only set when
|
|
parse_args() is active, and continually trimmed down as
|
|
we consume arguments. Mainly there for the benefit of
|
|
callback options.
|
|
largs : [string]
|
|
the list of leftover arguments that we have skipped while
|
|
parsing options. If allow_interspersed_args is false, this
|
|
list is always empty.
|
|
values : Values
|
|
the set of option values currently being accumulated. Only
|
|
set when parse_args() is active. Also mainly for callbacks.
|
|
|
|
Because of the 'rargs', 'largs', and 'values' attributes,
|
|
OptionParser is not thread-safe. If, for some perverse reason, you
|
|
need to parse command-line arguments simultaneously in different
|
|
threads, use different OptionParser instances.
|
|
|
|
"""
|
|
|
|
standard_option_list = []
|
|
|
|
def __init__ (self,
|
|
usage=None,
|
|
option_list=None,
|
|
option_class=Option,
|
|
version=None,
|
|
conflict_handler="error",
|
|
description=None,
|
|
formatter=None,
|
|
add_help_option=1,
|
|
prog=None):
|
|
OptionContainer.__init__(
|
|
self, option_class, conflict_handler, description)
|
|
self.set_usage(usage)
|
|
self.prog = prog
|
|
self.version = version
|
|
self.allow_interspersed_args = 1
|
|
if formatter is None:
|
|
formatter = IndentedHelpFormatter()
|
|
self.formatter = formatter
|
|
|
|
# Populate the option list; initial sources are the
|
|
# standard_option_list class attribute, the 'option_list'
|
|
# argument, and the STD_VERSION_OPTION (if 'version' supplied)
|
|
# and STD_HELP_OPTION globals.
|
|
self._populate_option_list(option_list,
|
|
add_help=add_help_option)
|
|
|
|
self._init_parsing_state()
|
|
|
|
# -- Private methods -----------------------------------------------
|
|
# (used by our or OptionContainer's constructor)
|
|
|
|
def _create_option_list (self):
|
|
self.option_list = []
|
|
self.option_groups = []
|
|
self._create_option_mappings()
|
|
|
|
def _populate_option_list (self, option_list, add_help=1):
|
|
if self.standard_option_list:
|
|
self.add_options(self.standard_option_list)
|
|
if option_list:
|
|
self.add_options(option_list)
|
|
if self.version:
|
|
self.add_option(STD_VERSION_OPTION)
|
|
if add_help:
|
|
self.add_option(STD_HELP_OPTION)
|
|
|
|
def _init_parsing_state (self):
|
|
# These are set in parse_args() for the convenience of callbacks.
|
|
self.rargs = None
|
|
self.largs = None
|
|
self.values = None
|
|
|
|
|
|
# -- Simple modifier methods ---------------------------------------
|
|
|
|
def set_usage (self, usage):
|
|
if usage is None:
|
|
self.usage = "%prog [options]"
|
|
elif usage is SUPPRESS_USAGE:
|
|
self.usage = None
|
|
elif usage.startswith("usage: "):
|
|
# for backwards compatibility with Optik 1.3 and earlier
|
|
self.usage = usage[7:]
|
|
else:
|
|
self.usage = usage
|
|
|
|
def enable_interspersed_args (self):
|
|
self.allow_interspersed_args = 1
|
|
|
|
def disable_interspersed_args (self):
|
|
self.allow_interspersed_args = 0
|
|
|
|
def set_default (self, dest, value):
|
|
self.defaults[dest] = value
|
|
|
|
def set_defaults (self, **kwargs):
|
|
self.defaults.update(kwargs)
|
|
|
|
def get_default_values (self):
|
|
return Values(self.defaults)
|
|
|
|
|
|
# -- OptionGroup methods -------------------------------------------
|
|
|
|
def add_option_group (self, *args, **kwargs):
|
|
# XXX lots of overlap with OptionContainer.add_option()
|
|
if type(args[0]) is types.StringType:
|
|
group = OptionGroup(self, *args, **kwargs)
|
|
elif len(args) == 1 and not kwargs:
|
|
group = args[0]
|
|
if not isinstance(group, OptionGroup):
|
|
raise TypeError, "not an OptionGroup instance: %r" % group
|
|
if group.parser is not self:
|
|
raise ValueError, "invalid OptionGroup (wrong parser)"
|
|
else:
|
|
raise TypeError, "invalid arguments"
|
|
|
|
self.option_groups.append(group)
|
|
return group
|
|
|
|
def get_option_group (self, opt_str):
|
|
option = (self._short_opt.get(opt_str) or
|
|
self._long_opt.get(opt_str))
|
|
if option and option.container is not self:
|
|
return option.container
|
|
return None
|
|
|
|
|
|
# -- Option-parsing methods ----------------------------------------
|
|
|
|
def _get_args (self, args):
|
|
if args is None:
|
|
return sys.argv[1:]
|
|
else:
|
|
return args[:] # don't modify caller's list
|
|
|
|
def parse_args (self, args=None, values=None):
|
|
"""
|
|
parse_args(args : [string] = sys.argv[1:],
|
|
values : Values = None)
|
|
-> (values : Values, args : [string])
|
|
|
|
Parse the command-line options found in 'args' (default:
|
|
sys.argv[1:]). Any errors result in a call to 'error()', which
|
|
by default prints the usage message to stderr and calls
|
|
sys.exit() with an error message. On success returns a pair
|
|
(values, args) where 'values' is an Values instance (with all
|
|
your option values) and 'args' is the list of arguments left
|
|
over after parsing options.
|
|
"""
|
|
rargs = self._get_args(args)
|
|
if values is None:
|
|
values = self.get_default_values()
|
|
|
|
# Store the halves of the argument list as attributes for the
|
|
# convenience of callbacks:
|
|
# rargs
|
|
# the rest of the command-line (the "r" stands for
|
|
# "remaining" or "right-hand")
|
|
# largs
|
|
# the leftover arguments -- ie. what's left after removing
|
|
# options and their arguments (the "l" stands for "leftover"
|
|
# or "left-hand")
|
|
self.rargs = rargs
|
|
self.largs = largs = []
|
|
self.values = values
|
|
|
|
try:
|
|
stop = self._process_args(largs, rargs, values)
|
|
except (BadOptionError, OptionValueError), err:
|
|
self.error(err.msg)
|
|
|
|
args = largs + rargs
|
|
return self.check_values(values, args)
|
|
|
|
def check_values (self, values, args):
|
|
"""
|
|
check_values(values : Values, args : [string])
|
|
-> (values : Values, args : [string])
|
|
|
|
Check that the supplied option values and leftover arguments are
|
|
valid. Returns the option values and leftover arguments
|
|
(possibly adjusted, possibly completely new -- whatever you
|
|
like). Default implementation just returns the passed-in
|
|
values; subclasses may override as desired.
|
|
"""
|
|
return (values, args)
|
|
|
|
def _process_args (self, largs, rargs, values):
|
|
"""_process_args(largs : [string],
|
|
rargs : [string],
|
|
values : Values)
|
|
|
|
Process command-line arguments and populate 'values', consuming
|
|
options and arguments from 'rargs'. If 'allow_interspersed_args' is
|
|
false, stop at the first non-option argument. If true, accumulate any
|
|
interspersed non-option arguments in 'largs'.
|
|
"""
|
|
while rargs:
|
|
arg = rargs[0]
|
|
# We handle bare "--" explicitly, and bare "-" is handled by the
|
|
# standard arg handler since the short arg case ensures that the
|
|
# len of the opt string is greater than 1.
|
|
if arg == "--":
|
|
del rargs[0]
|
|
return
|
|
elif arg[0:2] == "--":
|
|
# process a single long option (possibly with value(s))
|
|
self._process_long_opt(rargs, values)
|
|
elif arg[:1] == "-" and len(arg) > 1:
|
|
# process a cluster of short options (possibly with
|
|
# value(s) for the last one only)
|
|
self._process_short_opts(rargs, values)
|
|
elif self.allow_interspersed_args:
|
|
largs.append(arg)
|
|
del rargs[0]
|
|
else:
|
|
return # stop now, leave this arg in rargs
|
|
|
|
# Say this is the original argument list:
|
|
# [arg0, arg1, ..., arg(i-1), arg(i), arg(i+1), ..., arg(N-1)]
|
|
# ^
|
|
# (we are about to process arg(i)).
|
|
#
|
|
# Then rargs is [arg(i), ..., arg(N-1)] and largs is a *subset* of
|
|
# [arg0, ..., arg(i-1)] (any options and their arguments will have
|
|
# been removed from largs).
|
|
#
|
|
# The while loop will usually consume 1 or more arguments per pass.
|
|
# If it consumes 1 (eg. arg is an option that takes no arguments),
|
|
# then after _process_arg() is done the situation is:
|
|
#
|
|
# largs = subset of [arg0, ..., arg(i)]
|
|
# rargs = [arg(i+1), ..., arg(N-1)]
|
|
#
|
|
# If allow_interspersed_args is false, largs will always be
|
|
# *empty* -- still a subset of [arg0, ..., arg(i-1)], but
|
|
# not a very interesting subset!
|
|
|
|
def _match_long_opt (self, opt):
|
|
"""_match_long_opt(opt : string) -> string
|
|
|
|
Determine which long option string 'opt' matches, ie. which one
|
|
it is an unambiguous abbrevation for. Raises BadOptionError if
|
|
'opt' doesn't unambiguously match any long option string.
|
|
"""
|
|
return _match_abbrev(opt, self._long_opt)
|
|
|
|
def _process_long_opt (self, rargs, values):
|
|
arg = rargs.pop(0)
|
|
|
|
# Value explicitly attached to arg? Pretend it's the next
|
|
# argument.
|
|
if "=" in arg:
|
|
(opt, next_arg) = arg.split("=", 1)
|
|
rargs.insert(0, next_arg)
|
|
had_explicit_value = 1
|
|
else:
|
|
opt = arg
|
|
had_explicit_value = 0
|
|
|
|
opt = self._match_long_opt(opt)
|
|
option = self._long_opt[opt]
|
|
if option.takes_value():
|
|
nargs = option.nargs
|
|
if len(rargs) < nargs:
|
|
if nargs == 1:
|
|
self.error("%s option requires a value" % opt)
|
|
else:
|
|
self.error("%s option requires %d values"
|
|
% (opt, nargs))
|
|
elif nargs == 1:
|
|
value = rargs.pop(0)
|
|
else:
|
|
value = tuple(rargs[0:nargs])
|
|
del rargs[0:nargs]
|
|
|
|
elif had_explicit_value:
|
|
self.error("%s option does not take a value" % opt)
|
|
|
|
else:
|
|
value = None
|
|
|
|
option.process(opt, value, values, self)
|
|
|
|
def _process_short_opts (self, rargs, values):
|
|
arg = rargs.pop(0)
|
|
stop = 0
|
|
i = 1
|
|
for ch in arg[1:]:
|
|
opt = "-" + ch
|
|
option = self._short_opt.get(opt)
|
|
i += 1 # we have consumed a character
|
|
|
|
if not option:
|
|
self.error("no such option: %s" % opt)
|
|
if option.takes_value():
|
|
# Any characters left in arg? Pretend they're the
|
|
# next arg, and stop consuming characters of arg.
|
|
if i < len(arg):
|
|
rargs.insert(0, arg[i:])
|
|
stop = 1
|
|
|
|
nargs = option.nargs
|
|
if len(rargs) < nargs:
|
|
if nargs == 1:
|
|
self.error("%s option requires a value" % opt)
|
|
else:
|
|
self.error("%s option requires %s values"
|
|
% (opt, nargs))
|
|
elif nargs == 1:
|
|
value = rargs.pop(0)
|
|
else:
|
|
value = tuple(rargs[0:nargs])
|
|
del rargs[0:nargs]
|
|
|
|
else: # option doesn't take a value
|
|
value = None
|
|
|
|
option.process(opt, value, values, self)
|
|
|
|
if stop:
|
|
break
|
|
|
|
|
|
# -- Feedback methods ----------------------------------------------
|
|
|
|
def error (self, msg):
|
|
"""error(msg : string)
|
|
|
|
Print a usage message incorporating 'msg' to stderr and exit.
|
|
If you override this in a subclass, it should not return -- it
|
|
should either exit or raise an exception.
|
|
"""
|
|
self.print_usage(sys.stderr)
|
|
sys.exit("%s: error: %s" % (get_prog_name(), msg))
|
|
|
|
def get_usage (self):
|
|
if self.usage:
|
|
return self.formatter.format_usage(
|
|
self.usage.replace("%prog", get_prog_name()))
|
|
else:
|
|
return ""
|
|
|
|
def print_usage (self, file=None):
|
|
"""print_usage(file : file = stdout)
|
|
|
|
Print the usage message for the current program (self.usage) to
|
|
'file' (default stdout). Any occurence of the string "%prog" in
|
|
self.usage is replaced with the name of the current program
|
|
(basename of sys.argv[0]). Does nothing if self.usage is empty
|
|
or not defined.
|
|
"""
|
|
if self.usage:
|
|
print >>file, self.get_usage()
|
|
|
|
def get_version (self):
|
|
if self.version:
|
|
return self.version.replace("%prog", get_prog_name())
|
|
else:
|
|
return ""
|
|
|
|
def print_version (self, file=None):
|
|
"""print_version(file : file = stdout)
|
|
|
|
Print the version message for this program (self.version) to
|
|
'file' (default stdout). As with print_usage(), any occurence
|
|
of "%prog" in self.version is replaced by the current program's
|
|
name. Does nothing if self.version is empty or undefined.
|
|
"""
|
|
if self.version:
|
|
print >>file, self.get_version()
|
|
|
|
def format_option_help (self, formatter=None):
|
|
if formatter is None:
|
|
formatter = self.formatter
|
|
formatter.store_option_strings(self)
|
|
result = []
|
|
result.append(formatter.format_heading("options"))
|
|
formatter.indent()
|
|
if self.option_list:
|
|
result.append(OptionContainer.format_option_help(self, formatter))
|
|
result.append("\n")
|
|
for group in self.option_groups:
|
|
result.append(group.format_help(formatter))
|
|
result.append("\n")
|
|
formatter.dedent()
|
|
# Drop the last "\n", or the header if no options or option groups:
|
|
return "".join(result[:-1])
|
|
|
|
def format_help (self, formatter=None):
|
|
if formatter is None:
|
|
formatter = self.formatter
|
|
result = []
|
|
if self.usage:
|
|
result.append(self.get_usage() + "\n")
|
|
if self.description:
|
|
result.append(self.format_description(formatter) + "\n")
|
|
result.append(self.format_option_help(formatter))
|
|
return "".join(result)
|
|
|
|
def print_help (self, file=None):
|
|
"""print_help(file : file = stdout)
|
|
|
|
Print an extended help message, listing all options and any
|
|
help text provided with them, to 'file' (default stdout).
|
|
"""
|
|
if file is None:
|
|
file = sys.stdout
|
|
file.write(self.format_help())
|
|
|
|
# class OptionParser
|
|
|
|
|
|
def _match_abbrev (s, wordmap):
|
|
"""_match_abbrev(s : string, wordmap : {string : Option}) -> string
|
|
|
|
Return the string key in 'wordmap' for which 's' is an unambiguous
|
|
abbreviation. If 's' is found to be ambiguous or doesn't match any of
|
|
'words', raise BadOptionError.
|
|
"""
|
|
# Is there an exact match?
|
|
if wordmap.has_key(s):
|
|
return s
|
|
else:
|
|
# Isolate all words with s as a prefix.
|
|
possibilities = [word for word in wordmap.keys()
|
|
if word.startswith(s)]
|
|
# No exact match, so there had better be just one possibility.
|
|
if len(possibilities) == 1:
|
|
return possibilities[0]
|
|
elif not possibilities:
|
|
raise BadOptionError("no such option: %s" % s)
|
|
else:
|
|
# More than one possible completion: ambiguous prefix.
|
|
raise BadOptionError("ambiguous option: %s (%s?)"
|
|
% (s, ", ".join(possibilities)))
|
|
|
|
|
|
# Some day, there might be many Option classes. As of Optik 1.3, the
|
|
# preferred way to instantiate Options is indirectly, via make_option(),
|
|
# which will become a factory function when there are many Option
|
|
# classes.
|
|
make_option = Option
|