diff options
Diffstat (limited to 'engine/SCons/compat/_scons_optparse.py')
| -rw-r--r-- | engine/SCons/compat/_scons_optparse.py | 1725 |
1 files changed, 1725 insertions, 0 deletions
diff --git a/engine/SCons/compat/_scons_optparse.py b/engine/SCons/compat/_scons_optparse.py new file mode 100644 index 0000000..219adba --- /dev/null +++ b/engine/SCons/compat/_scons_optparse.py @@ -0,0 +1,1725 @@ +"""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__ = "1.5.3" + +__all__ = ['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 string +import sys, os +import types +import textwrap + +def _repr(self): + return "<%s at 0x%x: %s>" % (self.__class__.__name__, id(self), self) + + +try: + sys.getdefaultencoding +except AttributeError: + def fake_getdefaultencoding(): + return None + sys.getdefaultencoding = fake_getdefaultencoding + +try: + ''.encode +except AttributeError: + def encode_wrapper(s, encoding, replacement): + return s +else: + def encode_wrapper(s, encoding, replacement): + return s.encode(encoding, replacement) + + +# 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, string.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 + self.help_position = self.max_help_position = max_help_position + if width is None: + try: + width = int(os.environ['COLUMNS']) + except (KeyError, ValueError): + width = 80 + width = width - 2 + self.width = width + 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.current_indent + self.indent_increment + self.level = self.level + 1 + + def dedent(self): + self.current_indent = self.current_indent - self.indent_increment + assert self.current_indent >= 0, "Indent decreased below 0." + self.level = 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 = self.width - self.current_indent + 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 string.replace(option.help, 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])) + for line in help_lines[1:]: + result.append("%*s%s\n" % (self.help_position, "", line)) + elif opts[-1] != "\n": + result.append("\n") + return string.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 = self.width - self.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 string.upper(option.dest) + short_opts = [] + for sopt in option._short_opts: + short_opts.append(self._short_opt_fmt % (sopt, metavar)) + long_opts = [] + for lopt in option._long_opts: + long_opts.append(self._long_opt_fmt % (lopt, metavar)) + 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 string.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 string.lower(val[:2]) == "0x": # hexadecimal + radix = 16 + elif string.lower(val[:2]) == "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) + +try: + int('0', 10) +except TypeError: + # Python 1.5.2 doesn't allow a radix value to be passed to int(). + _parse_int = int + +try: + long('0', 10) +except TypeError: + # Python 1.5.2 doesn't allow a radix value to be passed to long(). + _parse_long = 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 = string.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 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: + attrs = attrs.keys() + attrs.sort() + raise OptionError( + "invalid keyword arguments: %s" % string.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)" + % string.split(str(type(self.choices)), "'")[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 = string.replace(self._long_opts[0][2:], '-', '_') + 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 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 string.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(map(lambda v, o=opt, s=self: s.check_value(o, v), 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 {} + apply(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 RuntimeError, "unknown action %r" % self.action + + return 1 + +# class Option + + +SUPPRESS_HELP = "SUPPRESS"+"HELP" +SUPPRESS_USAGE = "SUPPRESS"+"USAGE" + +# For compatibility with Python 2.2 +try: + True, False +except NameError: + (True, False) = (1, 0) + +try: + types.UnicodeType +except AttributeError: + def isbasestring(x): + return isinstance(x, types.StringType) +else: + def isbasestring(x): + return isinstance(x, types.StringType) or isinstance(x, types.UnicodeType) + +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 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 = {} + exec open(filename, 'rU').read() in 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 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 == "error": + raise OptionConflictError( + "conflicting option string(s): %s" + % string.join(map(lambda co: co[0], conflict_opts), ", "), + option) + elif handler == "resolve": + for (opt, c_option) in conflict_opts: + if opt[:2] == "--": + 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 = apply(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 string.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 string.join(result, "\n") + + +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 = 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])). + 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 string.lower(usage)[:7] == "usage: ": + self.usage = usage[7:] + else: + self.usage = usage + + def enable_interspersed_args(self): + self.allow_interspersed_args = True + + def disable_interspersed_args(self): + 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 = apply(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 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) = string.split(arg, "=", 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 = 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 string.replace(s, "%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 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: + file.write(self.get_usage() + '\n') + + 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 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: + file.write(self.get_version() + '\n') + + 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 string.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 string.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(encode_wrapper(self.format_help(), 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 wordmap.has_key(s): + return s + else: + # Isolate all words with s as a prefix. + possibilities = filter(lambda w, s=s: w[:len(s)] == s, wordmap.keys()) + # 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 + +# Local Variables: +# tab-width:4 +# indent-tabs-mode:nil +# End: +# vim: set expandtab tabstop=4 shiftwidth=4: |