EcchiShell v1.0

usr

lib64

python2.7

= 2") % long if (not ((short is None) or (isinstance(short, str) and len(short) == 1))): raise DistutilsGetoptError, \ ("invalid short option '%s': " "must a single character or None") % short self.repeat[long] = repeat self.long_opts.append(long) if long[-1] == '=': # option takes an argument? if short: short = short + ':' long = long[0:-1] self.takes_arg[long] = 1 else: # Is option is a "negative alias" for some other option (eg. # "quiet" == "!verbose")? alias_to = self.negative_alias.get(long) if alias_to is not None: if self.takes_arg[alias_to]: raise DistutilsGetoptError, \ ("invalid negative alias '%s': " "aliased option '%s' takes a value") % \ (long, alias_to) self.long_opts[-1] = long # XXX redundant?! self.takes_arg[long] = 0 else: self.takes_arg[long] = 0 # If this is an alias option, make sure its "takes arg" flag is # the same as the option it's aliased to. alias_to = self.alias.get(long) if alias_to is not None: if self.takes_arg[long] != self.takes_arg[alias_to]: raise DistutilsGetoptError, \ ("invalid alias '%s': inconsistent with " "aliased option '%s' (one of them takes a value, " "the other doesn't") % (long, alias_to) # Now enforce some bondage on the long option name, so we can # later translate it to an attribute name on some object. Have # to do this a bit late to make sure we've removed any trailing # '='. if not longopt_re.match(long): raise DistutilsGetoptError, \ ("invalid long option name '%s' " + "(must be letters, numbers, hyphens only") % long self.attr_name[long] = self.get_attr_name(long) if short: self.short_opts.append(short) self.short2long[short[0]] = long # for option_table # _grok_option_table() def getopt (self, args=None, object=None): """Parse command-line options in args. Store as attributes on object. If 'args' is None or not supplied, uses 'sys.argv[1:]'. If 'object' is None or not supplied, creates a new OptionDummy object, stores option values there, and returns a tuple (args, object). If 'object' is supplied, it is modified in place and 'getopt()' just returns 'args'; in both cases, the returned 'args' is a modified copy of the passed-in 'args' list, which is left untouched. """ if args is None: args = sys.argv[1:] if object is None: object = OptionDummy() created_object = 1 else: created_object = 0 self._grok_option_table() short_opts = string.join(self.short_opts) try: opts, args = getopt.getopt(args, short_opts, self.long_opts) except getopt.error, msg: raise DistutilsArgError, msg for opt, val in opts: if len(opt) == 2 and opt[0] == '-': # it's a short option opt = self.short2long[opt[1]] else: assert len(opt) > 2 and opt[:2] == '--' opt = opt[2:] alias = self.alias.get(opt) if alias: opt = alias if not self.takes_arg[opt]: # boolean option? assert val == '', "boolean option can't have value" alias = self.negative_alias.get(opt) if alias: opt = alias val = 0 else: val = 1 attr = self.attr_name[opt] # The only repeating option at the moment is 'verbose'. # It has a negative option -q quiet, which should set verbose = 0. if val and self.repeat.get(attr) is not None: val = getattr(object, attr, 0) + 1 setattr(object, attr, val) self.option_order.append((opt, val)) # for opts if created_object: return args, object else: return args # getopt() def get_option_order (self): """Returns the list of (option, value) tuples processed by the previous run of 'getopt()'. Raises RuntimeError if 'getopt()' hasn't been called yet. """ if self.option_order is None: raise RuntimeError, "'getopt()' hasn't been called yet" else: return self.option_order def generate_help (self, header=None): """Generate help text (a list of strings, one per suggested line of output) from the option table for this FancyGetopt object. """ # Blithely assume the option table is good: probably wouldn't call # 'generate_help()' unless you've already called 'getopt()'. # First pass: determine maximum length of long option names max_opt = 0 for option in self.option_table: long = option[0] short = option[1] l = len(long) if long[-1] == '=': l = l - 1 if short is not None: l = l + 5 # " (-x)" where short == 'x' if l > max_opt: max_opt = l opt_width = max_opt + 2 + 2 + 2 # room for indent + dashes + gutter # Typical help block looks like this: # --foo controls foonabulation # Help block for longest option looks like this: # --flimflam set the flim-flam level # and with wrapped text: # --flimflam set the flim-flam level (must be between # 0 and 100, except on Tuesdays) # Options with short names will have the short name shown (but # it doesn't contribute to max_opt): # --foo (-f) controls foonabulation # If adding the short option would make the left column too wide, # we push the explanation off to the next line # --flimflam (-l) # set the flim-flam level # Important parameters: # - 2 spaces before option block start lines # - 2 dashes for each long option name # - min. 2 spaces between option and explanation (gutter) # - 5 characters (incl. space) for short option name # Now generate lines of help text. (If 80 columns were good enough # for Jesus, then 78 columns are good enough for me!) line_width = 78 text_width = line_width - opt_width big_indent = ' ' * opt_width if header: lines = [header] else: lines = ['Option summary:'] for option in self.option_table: long, short, help = option[:3] text = wrap_text(help, text_width) if long[-1] == '=': long = long[0:-1] # Case 1: no short option at all (makes life easy) if short is None: if text: lines.append(" --%-*s %s" % (max_opt, long, text[0])) else: lines.append(" --%-*s " % (max_opt, long)) # Case 2: we have a short option, so we have to include it # just after the long option else: opt_names = "%s (-%s)" % (long, short) if text: lines.append(" --%-*s %s" % (max_opt, opt_names, text[0])) else: lines.append(" --%-*s" % opt_names) for l in text[1:]: lines.append(big_indent + l) # for self.option_table return lines # generate_help () def print_help (self, header=None, file=None): if file is None: file = sys.stdout for line in self.generate_help(header): file.write(line + "\n") # class FancyGetopt def fancy_getopt (options, negative_opt, object, args): parser = FancyGetopt(options) parser.set_negative_aliases(negative_opt) return parser.getopt(args, object) WS_TRANS = string.maketrans(string.whitespace, ' ' * len(string.whitespace)) def wrap_text (text, width): """wrap_text(text : string, width : int) -> [string] Split 'text' into multiple lines of no more than 'width' characters each, and return the list of strings that results. """ if text is None: return [] if len(text) <= width: return [text] text = string.expandtabs(text) text = string.translate(text, WS_TRANS) chunks = re.split(r'( +|-+)', text) chunks = filter(None, chunks) # ' - ' results in empty strings lines = [] while chunks: cur_line = [] # list of chunks (to-be-joined) cur_len = 0 # length of current line while chunks: l = len(chunks[0]) if cur_len + l <= width: # can squeeze (at least) this chunk in cur_line.append(chunks[0]) del chunks[0] cur_len = cur_len + l else: # this line is full # drop last chunk if all space if cur_line and cur_line[-1][0] == ' ': del cur_line[-1] break if chunks: # any chunks left to process? # if the current line is still empty, then we had a single # chunk that's too big too fit on a line -- so we break # down and break it up at the line width if cur_len == 0: cur_line.append(chunks[0][0:width]) chunks[0] = chunks[0][width:] # all-whitespace chunks at the end of a line can be discarded # (and we know from the re.split above that if a chunk has # *any* whitespace, it is *all* whitespace) if chunks[0][0] == ' ': del chunks[0] # and store this line in the list-of-all-lines -- as a single # string, of course! lines.append(string.join(cur_line, '')) # while chunks return lines def translate_longopt(opt): """Convert a long option name to a valid Python identifier by changing "-" to "_". """ return string.translate(opt, longopt_xlate) class OptionDummy: """Dummy class just used as a place to hold command-line option values as instance attributes.""" def __init__ (self, options=[]): """Create a new OptionDummy instance. The attributes listed in 'options' will be initialized to None.""" for opt in options: setattr(self, opt, None)