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+"""A powerful, extensible, and easy-to-use option parser.
+
+By Greg Ward <gward@python.net>
+
+Originally distributed as Optik.
+
+For support, use the optik-users@lists.sourceforge.net mailing list
+(http://lists.sourceforge.net/lists/listinfo/optik-users).
+
+Simple usage example:
+
+ from optparse import OptionParser
+
+ parser = OptionParser()
+ parser.add_option("-f", "--file", dest="filename",
+ help="write report to FILE", metavar="FILE")
+ parser.add_option("-q", "--quiet",
+ action="store_false", dest="verbose", default=True,
+ help="don't print status messages to stdout")
+
+ (options, args) = parser.parse_args()
+"""
+
+__version__ = "1.5.3"
+
+__all__ = ['Option',
+ 'make_option',
+ 'SUPPRESS_HELP',
+ 'SUPPRESS_USAGE',
+ 'Values',
+ 'OptionContainer',
+ 'OptionGroup',
+ 'OptionParser',
+ 'HelpFormatter',
+ 'IndentedHelpFormatter',
+ 'TitledHelpFormatter',
+ 'OptParseError',
+ 'OptionError',
+ 'OptionConflictError',
+ 'OptionValueError',
+ 'BadOptionError']
+
+__copyright__ = """
+Copyright (c) 2001-2006 Gregory P. Ward. All rights reserved.
+Copyright (c) 2002-2006 Python Software Foundation. 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
+
+def _repr(self):
+ return "<%s at 0x%x: %s>" % (self.__class__.__name__, id(self), self)
+
+
+# This file was generated from:
+# Id: option_parser.py 527 2006-07-23 15:21:30Z greg
+# Id: option.py 522 2006-06-11 16:22:03Z gward
+# Id: help.py 527 2006-07-23 15:21:30Z greg
+# Id: errors.py 509 2006-04-20 00:58:24Z gward
+
+try:
+ from gettext import gettext
+except ImportError:
+ def gettext(message):
+ return message
+_ = gettext
+
+
+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 option is seen on the command line.
+ """
+ def __init__(self, opt_str):
+ self.opt_str = opt_str
+
+ def __str__(self):
+ return _("no such option: %s") % self.opt_str
+
+class AmbiguousOptionError (BadOptionError):
+ """
+ Raised if an ambiguous option is seen on the command line.
+ """
+ def __init__(self, opt_str, possibilities):
+ BadOptionError.__init__(self, opt_str)
+ self.possibilities = possibilities
+
+ def __str__(self):
+ return (_("ambiguous option: %s (%s?)")
+ % (self.opt_str, ", ".join(self.possibilities)))
+
+
+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:
+ parser : OptionParser
+ the controlling OptionParser instance
+ 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 (pass None to constructor for
+ this value to be taken from the $COLUMNS environment variable)
+ 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)
+ default_tag : str
+ text to replace with each option's default value, "%default"
+ by default. Set to false value to disable default value expansion.
+ option_strings : { Option : str }
+ maps Option instances to the snippet of help text explaining
+ the syntax of that option, e.g. "-h, --help" or
+ "-fFILE, --file=FILE"
+ _short_opt_fmt : str
+ format string controlling how short options with values are
+ printed in help text. Must be either "%s%s" ("-fFILE") or
+ "%s %s" ("-f FILE"), because those are the two syntaxes that
+ Optik supports.
+ _long_opt_fmt : str
+ similar but for long options; must be either "%s %s" ("--file FILE")
+ or "%s=%s" ("--file=FILE").
+ """
+
+ NO_DEFAULT_VALUE = "none"
+
+ def __init__(self,
+ indent_increment,
+ max_help_position,
+ width,
+ short_first):
+ self.parser = None
+ self.indent_increment = indent_increment
+ if width is None:
+ try:
+ width = int(os.environ['COLUMNS'])
+ except (KeyError, ValueError):
+ width = 80
+ width -= 2
+ self.width = width
+ self.help_position = self.max_help_position = \
+ min(max_help_position, max(width - 20, indent_increment * 2))
+ self.current_indent = 0
+ self.level = 0
+ self.help_width = None # computed later
+ self.short_first = short_first
+ self.default_tag = "%default"
+ self.option_strings = {}
+ self._short_opt_fmt = "%s %s"
+ self._long_opt_fmt = "%s=%s"
+
+ def set_parser(self, parser):
+ self.parser = parser
+
+ def set_short_opt_delimiter(self, delim):
+ if delim not in ("", " "):
+ raise ValueError(
+ "invalid metavar delimiter for short options: %r" % delim)
+ self._short_opt_fmt = "%s" + delim + "%s"
+
+ def set_long_opt_delimiter(self, delim):
+ if delim not in ("=", " "):
+ raise ValueError(
+ "invalid metavar delimiter for long options: %r" % delim)
+ self._long_opt_fmt = "%s" + delim + "%s"
+
+ 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_text(self, text):
+ """
+ Format a paragraph of free-form text for inclusion in the
+ help output at the current indentation level.
+ """
+ text_width = max(self.width - self.current_indent, 11)
+ indent = " "*self.current_indent
+ return textwrap.fill(text,
+ text_width,
+ initial_indent=indent,
+ subsequent_indent=indent)
+
+ def format_description(self, description):
+ if description:
+ return self._format_text(description) + "\n"
+ else:
+ return ""
+
+ def format_epilog(self, epilog):
+ if epilog:
+ return "\n" + self._format_text(epilog) + "\n"
+ else:
+ return ""
+
+
+ def expand_default(self, option):
+ if self.parser is None or not self.default_tag:
+ return option.help
+
+ default_value = self.parser.defaults.get(option.dest)
+ if default_value is NO_DEFAULT or default_value is None:
+ default_value = self.NO_DEFAULT_VALUE
+
+ return option.help.replace(self.default_tag, str(default_value))
+
+ 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 = self.option_strings[option]
+ 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_text = self.expand_default(option)
+ help_lines = textwrap.wrap(help_text, 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)
+ self.option_strings[opt] = 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)
+ self.option_strings[opt] = 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)
+ self.help_width = max(self.width - self.help_position, 11)
+
+ 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 = [self._short_opt_fmt % (sopt, metavar)
+ for sopt in option._short_opts]
+ long_opts = [self._long_opt_fmt % (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=None,
+ 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=None,
+ 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))
+
+
+def _parse_num(val, type):
+ if val[:2].lower() == "0x": # hexadecimal
+ radix = 16
+ elif val[:2].lower() == "0b": # binary
+ radix = 2
+ val = val[2:] or "0" # have to remove "0b" prefix
+ elif val[:1] == "0": # octal
+ radix = 8
+ else: # decimal
+ radix = 10
+
+ return type(val, radix)
+
+def _parse_int(val):
+ return _parse_num(val, int)
+
+def _parse_long(val):
+ return _parse_num(val, long)
+
+_builtin_cvt = { "int" : (_parse_int, _("integer")),
+ "long" : (_parse_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(
+ _("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",
+ "append_const",
+ "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",
+ "append_const",
+ "count")
+
+ # The set of actions for which it makes sense to supply a value
+ # type, ie. which may consume an argument from the command line.
+ TYPED_ACTIONS = ("store",
+ "append",
+ "callback")
+
+ # The set of actions which *require* a value type, ie. that
+ # always consume an argument from the command line.
+ ALWAYS_TYPED_ACTIONS = ("store",
+ "append")
+
+ # The set of actions which take a 'const' attribute.
+ CONST_ACTIONS = ("store_const",
+ "append_const")
+
+ # 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 attr in attrs:
+ setattr(self, attr, attrs[attr])
+ del attrs[attr]
+ else:
+ if attr == 'default':
+ setattr(self, attr, NO_DEFAULT)
+ else:
+ setattr(self, attr, None)
+ if attrs:
+ attrs = attrs.keys()
+ attrs.sort()
+ raise OptionError(
+ "invalid keyword arguments: %s" % ", ".join(attrs),
+ 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:
+ if self.action in self.ALWAYS_TYPED_ACTIONS:
+ 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:
+ # Allow type objects or builtin type conversion functions
+ # (int, str, etc.) as an alternative to their names. (The
+ # complicated check of __builtin__ is only necessary for
+ # Python 2.1 and earlier, and is short-circuited by the
+ # first check on modern Pythons.)
+ import __builtin__
+ if ( type(self.type) is types.TypeType or
+ (hasattr(self.type, "__name__") and
+ getattr(__builtin__, self.type.__name__, None) is self.type) ):
+ self.type = self.type.__name__
+
+ if self.type == "str":
+ self.type = "string"
+
+ 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):
+ # No destination given, and we need one for this action. The
+ # self.type check is for callbacks that take a value.
+ takes_value = (self.action in self.STORE_ACTIONS or
+ self.type is not None)
+ if self.dest is None and takes_value:
+
+ # 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 not in self.CONST_ACTIONS 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 hasattr(self.callback, '__call__'):
+ 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)
+
+ __repr__ = _repr
+
+ def takes_value(self):
+ return self.type is not None
+
+ def get_opt_string(self):
+ if self._long_opts:
+ return self._long_opts[0]
+ else:
+ return self._short_opts[0]
+
+
+ # -- 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 convert_value(self, opt, value):
+ if value is not None:
+ if self.nargs == 1:
+ return self.check_value(opt, value)
+ else:
+ return tuple([self.check_value(opt, v) for v in value])
+
+ def process(self, opt, value, values, parser):
+
+ # First, convert the value(s) to the right type. Howl if any
+ # value(s) are bogus.
+ value = self.convert_value(opt, 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 == "append_const":
+ values.ensure_value(dest, []).append(self.const)
+ 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()
+ parser.exit()
+ elif action == "version":
+ parser.print_version()
+ parser.exit()
+ else:
+ raise ValueError("unknown action %r" % self.action)
+
+ return 1
+
+# class Option
+
+
+SUPPRESS_HELP = "SUPPRESS"+"HELP"
+SUPPRESS_USAGE = "SUPPRESS"+"USAGE"
+
+try:
+ basestring
+except NameError:
+ def isbasestring(x):
+ return isinstance(x, (types.StringType, types.UnicodeType))
+else:
+ def isbasestring(x):
+ return isinstance(x, basestring)
+
+class Values:
+
+ def __init__(self, defaults=None):
+ if defaults:
+ for (attr, val) in defaults.items():
+ setattr(self, attr, val)
+
+ def __str__(self):
+ return str(self.__dict__)
+
+ __repr__ = _repr
+
+ def __cmp__(self, other):
+ if isinstance(other, Values):
+ return cmp(self.__dict__, other.__dict__)
+ elif isinstance(other, types.DictType):
+ return cmp(self.__dict__, other)
+ else:
+ return -1
+
+ 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 attr in dict:
+ 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 ("error", "resolve"):
+ raise ValueError, "invalid conflict_resolution value %r" % handler
+ self.conflict_handler = handler
+
+ def set_description(self, description):
+ self.description = description
+
+ def get_description(self):
+ return self.description
+
+
+ def destroy(self):
+ """see OptionParser.destroy()."""
+ del self._short_opt
+ del self._long_opt
+ del self.defaults
+
+
+ # -- Option-adding methods -----------------------------------------
+
+ def _check_conflict(self, option):
+ conflict_opts = []
+ for opt in option._short_opts:
+ if opt in self._short_opt:
+ conflict_opts.append((opt, self._short_opt[opt]))
+ for opt in option._long_opts:
+ if opt in self._long_opt:
+ conflict_opts.append((opt, self._long_opt[opt]))
+
+ if conflict_opts:
+ handler = self.conflict_handler
+ if handler == "error":
+ raise OptionConflictError(
+ "conflicting option string(s): %s"
+ % ", ".join([co[0] for co in conflict_opts]),
+ option)
+ elif handler == "resolve":
+ 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]) in types.StringTypes:
+ 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 option.dest not in self.defaults:
+ 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 (opt_str in self._short_opt or
+ opt_str in self._long_opt)
+
+ 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):
+ return formatter.format_description(self.get_description())
+
+ def format_help(self, formatter):
+ result = []
+ if self.description:
+ result.append(self.format_description(formatter))
+ if self.option_list:
+ result.append(self.format_option_help(formatter))
+ return "\n".join(result)
+
+
+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
+
+ def destroy(self):
+ """see OptionParser.destroy()."""
+ OptionContainer.destroy(self)
+ del self.option_list
+
+ # -- 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])).
+ description : string
+ A paragraph of text giving a brief overview of your program.
+ optparse reformats this paragraph to fit the current terminal
+ width and prints it when the user requests help (after usage,
+ but before the list of options).
+ epilog : string
+ paragraph of help text to print after option help
+
+ option_groups : [OptionGroup]
+ list of option groups in this parser (option groups are
+ irrelevant for parsing the command-line, but very useful
+ for generating help)
+
+ allow_interspersed_args : bool = 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.)
+
+ process_default_values : bool = true
+ if true, option default values are processed similarly to option
+ values from the command line: that is, they are passed to the
+ type-checking function for the option's type (as long as the
+ default value is a string). (This really only matters if you
+ have defined custom types; see SF bug #955889.) Set it to false
+ to restore the behaviour of Optik 1.4.1 and earlier.
+
+ 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=True,
+ prog=None,
+ epilog=None):
+ OptionContainer.__init__(
+ self, option_class, conflict_handler, description)
+ self.set_usage(usage)
+ self.prog = prog
+ self.version = version
+ self.allow_interspersed_args = True
+ self.process_default_values = True
+ if formatter is None:
+ formatter = IndentedHelpFormatter()
+ self.formatter = formatter
+ self.formatter.set_parser(self)
+ self.epilog = epilog
+
+ # Populate the option list; initial sources are the
+ # standard_option_list class attribute, the 'option_list'
+ # argument, and (if applicable) the _add_version_option() and
+ # _add_help_option() methods.
+ self._populate_option_list(option_list,
+ add_help=add_help_option)
+
+ self._init_parsing_state()
+
+
+ def destroy(self):
+ """
+ Declare that you are done with this OptionParser. This cleans up
+ reference cycles so the OptionParser (and all objects referenced by
+ it) can be garbage-collected promptly. After calling destroy(), the
+ OptionParser is unusable.
+ """
+ OptionContainer.destroy(self)
+ for group in self.option_groups:
+ group.destroy()
+ del self.option_list
+ del self.option_groups
+ del self.formatter
+
+
+ # -- 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 _add_help_option(self):
+ self.add_option("-h", "--help",
+ action="help",
+ help=_("show this help message and exit"))
+
+ def _add_version_option(self):
+ self.add_option("--version",
+ action="version",
+ help=_("show program's version number and exit"))
+
+ def _populate_option_list(self, option_list, add_help=True):
+ 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_version_option()
+ if add_help:
+ self._add_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
+ # For backwards compatibility with Optik 1.3 and earlier.
+ elif usage.lower().startswith("usage: "):
+ self.usage = usage[7:]
+ else:
+ self.usage = usage
+
+ def enable_interspersed_args(self):
+ """Set parsing to not stop on the first non-option, allowing
+ interspersing switches with command arguments. This is the
+ default behavior. See also disable_interspersed_args() and the
+ class documentation description of the attribute
+ allow_interspersed_args."""
+ self.allow_interspersed_args = True
+
+ def disable_interspersed_args(self):
+ """Set parsing to stop on the first non-option. Use this if
+ you have a command processor which runs another command that
+ has options of its own and you want to make sure these options
+ don't get confused.
+ """
+ self.allow_interspersed_args = False
+
+ def set_process_default_values(self, process):
+ self.process_default_values = process
+
+ def set_default(self, dest, value):
+ self.defaults[dest] = value
+
+ def set_defaults(self, **kwargs):
+ self.defaults.update(kwargs)
+
+ def _get_all_options(self):
+ options = self.option_list[:]
+ for group in self.option_groups:
+ options.extend(group.option_list)
+ return options
+
+ def get_default_values(self):
+ if not self.process_default_values:
+ # Old, pre-Optik 1.5 behaviour.
+ return Values(self.defaults)
+
+ defaults = self.defaults.copy()
+ for option in self._get_all_options():
+ default = defaults.get(option.dest)
+ if isbasestring(default):
+ opt_str = option.get_opt_string()
+ defaults[option.dest] = option.check_value(opt_str, default)
+
+ return Values(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(str(err))
+
+ 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 abbreviation 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 = True
+ else:
+ opt = arg
+ had_explicit_value = False
+
+ 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 an argument") % opt)
+ else:
+ self.error(_("%s option requires %d arguments")
+ % (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 = False
+ 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:
+ raise BadOptionError(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 = True
+
+ nargs = option.nargs
+ if len(rargs) < nargs:
+ if nargs == 1:
+ self.error(_("%s option requires an argument") % opt)
+ else:
+ self.error(_("%s option requires %d arguments")
+ % (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 get_prog_name(self):
+ if self.prog is None:
+ return os.path.basename(sys.argv[0])
+ else:
+ return self.prog
+
+ def expand_prog_name(self, s):
+ return s.replace("%prog", self.get_prog_name())
+
+ def get_description(self):
+ return self.expand_prog_name(self.description)
+
+ def exit(self, status=0, msg=None):
+ if msg:
+ sys.stderr.write(msg)
+ sys.exit(status)
+
+ 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)
+ self.exit(2, "%s: error: %s\n" % (self.get_prog_name(), msg))
+
+ def get_usage(self):
+ if self.usage:
+ return self.formatter.format_usage(
+ self.expand_prog_name(self.usage))
+ 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 occurrence 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.expand_prog_name(self.version)
+ 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 occurrence
+ 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_epilog(self, formatter):
+ return formatter.format_epilog(self.epilog)
+
+ 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))
+ result.append(self.format_epilog(formatter))
+ return "".join(result)
+
+ # used by test suite
+ def _get_encoding(self, file):
+ encoding = getattr(file, "encoding", None)
+ if not encoding:
+ encoding = sys.getdefaultencoding()
+ return encoding
+
+ 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
+ encoding = self._get_encoding(file)
+ file.write(self.format_help().encode(encoding, "replace"))
+
+# 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 s in wordmap:
+ 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(s)
+ else:
+ # More than one possible completion: ambiguous prefix.
+ possibilities.sort()
+ raise AmbiguousOptionError(s, 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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 13:31:53 +0000