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""" msg = '\nUsage: %s\n' % self.indent_lines(textwrap.dedent(usage), " ") return msg def format_description(self, description): # leave full control over description to us if description: if hasattr(self.parser, 'main'): label = 'Commands' else: label = 'Description' # some doc strings have initial newlines, some don't description = description.lstrip('\n') # some doc strings have final newlines and spaces, some don't description = description.rstrip() # dedent, then reindent description = self.indent_lines(textwrap.dedent(description), " ") description = '%s:\n%s\n' % (label, description) return description else: return '' def format_epilog(self, epilog): # leave full control over epilog to us if epilog: return epilog else: return '' def indent_lines(self, text, indent): new_lines = [indent + line for line in text.split('\n')] return "\n".join(new_lines) class UpdatingDefaultsHelpFormatter(PrettyHelpFormatter): """Custom help formatter for use in ConfigOptionParser. This is updates the defaults before expanding them, allowing them to show up correctly in the help listing. """ def expand_default(self, option): if self.parser is not None: self.parser._update_defaults(self.parser.defaults) return optparse.IndentedHelpFormatter.expand_default(self, option) class CustomOptionParser(optparse.OptionParser): def insert_option_group(self, idx, *args, **kwargs): """Insert an OptionGroup at a given position.""" group = self.add_option_group(*args, **kwargs) self.option_groups.pop() self.option_groups.insert(idx, group) return group @property def option_list_all(self): """Get a list of all options, including those in option groups.""" res = self.option_list[:] for i in self.option_groups: res.extend(i.option_list) return res class ConfigOptionParser(CustomOptionParser): """Custom option parser which updates its defaults by checking the configuration files and environmental variables""" isolated = False def __init__(self, *args, **kwargs): self.config = configparser.RawConfigParser() self.name = kwargs.pop('name') self.isolated = kwargs.pop("isolated", False) self.files = self.get_config_files() if self.files: self.config.read(self.files) assert self.name optparse.OptionParser.__init__(self, *args, **kwargs) def get_config_files(self): # the files returned by this method will be parsed in order with the # first files listed being overridden by later files in standard # ConfigParser fashion config_file = os.environ.get('PIP_CONFIG_FILE', False) if config_file == os.devnull: return [] # at the base we have any site-wide configuration files = list(site_config_files) # per-user configuration next if not self.isolated: if config_file and os.path.exists(config_file): files.append(config_file) else: # This is the legacy config file, we consider it to be a lower # priority than the new file location. files.append(legacy_config_file) # This is the new config file, we consider it to be a higher # priority than the legacy file. files.append( os.path.join( appdirs.user_config_dir("pip"), config_basename, ) ) # finally virtualenv configuration first trumping others if running_under_virtualenv(): venv_config_file = os.path.join( sys.prefix, config_basename, ) if os.path.exists(venv_config_file): files.append(venv_config_file) return files def check_default(self, option, key, val): try: return option.check_value(key, val) except optparse.OptionValueError as exc: print("An error occurred during configuration: %s" % exc) sys.exit(3) def _update_defaults(self, defaults): """Updates the given defaults with values from the config files and the environ. Does a little special handling for certain types of options (lists).""" # Then go and look for the other sources of configuration: config = {} # 1. config files for section in ('global', self.name): config.update( self.normalize_keys(self.get_config_section(section)) ) # 2. environmental variables if not self.isolated: config.update(self.normalize_keys(self.get_environ_vars())) # Accumulate complex default state. self.values = optparse.Values(self.defaults) late_eval = set() # Then set the options with those values for key, val in config.items(): # ignore empty values if not val: continue option = self.get_option(key) # Ignore options not present in this parser. E.g. non-globals put # in [global] by users that want them to apply to all applicable # commands. if option is None: continue if option.action in ('store_true', 'store_false', 'count'): val = strtobool(val) elif option.action == 'append': val = val.split() val = [self.check_default(option, key, v) for v in val] elif option.action == 'callback': late_eval.add(option.dest) opt_str = option.get_opt_string() val = option.convert_value(opt_str, val) # From take_action args = option.callback_args or () kwargs = option.callback_kwargs or {} option.callback(option, opt_str, val, self, *args, **kwargs) else: val = self.check_default(option, key, val) defaults[option.dest] = val for key in late_eval: defaults[key] = getattr(self.values, key) self.values = None return defaults def normalize_keys(self, items): """Return a config dictionary with normalized keys regardless of whether the keys were specified in environment variables or in config files""" normalized = {} for key, val in items: key = key.replace('_', '-') if not key.startswith('--'): key = '--%s' % key # only prefer long opts normalized[key] = val return normalized def get_config_section(self, name): """Get a section of a configuration""" if self.config.has_section(name): return self.config.items(name) return [] def get_environ_vars(self): """Returns a generator with all environmental vars with prefix PIP_""" for key, val in os.environ.items(): if _environ_prefix_re.search(key): yield (_environ_prefix_re.sub("", key).lower(), val) def get_default_values(self): """Overriding to make updating the defaults after instantiation of the option parser possible, _update_defaults() does the dirty work.""" if not self.process_default_values: # Old, pre-Optik 1.5 behaviour. return optparse.Values(self.defaults) defaults = self._update_defaults(self.defaults.copy()) # ours for option in self._get_all_options(): default = defaults.get(option.dest) if isinstance(default, string_types): opt_str = option.get_opt_string() defaults[option.dest] = option.check_value(opt_str, default) return optparse.Values(defaults) def error(self, msg): self.print_usage(sys.stderr) self.exit(2, "%s\n" % msg)