Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/argcomplete/my_argparse.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 # Copyright 2012-2019, Andrey Kislyuk and argcomplete contributors. |
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2 # Licensed under the Apache License. See https://github.com/kislyuk/argcomplete for more info. |
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3 |
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4 from argparse import ArgumentParser, ArgumentError, SUPPRESS, _SubParsersAction |
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5 from argparse import OPTIONAL, ZERO_OR_MORE, ONE_OR_MORE, REMAINDER, PARSER |
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6 from argparse import _get_action_name, _ |
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7 |
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8 _num_consumed_args = {} |
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9 |
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10 |
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11 def action_is_satisfied(action): |
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12 ''' Returns False if the parse would raise an error if no more arguments are given to this action, True otherwise. |
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13 ''' |
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14 num_consumed_args = _num_consumed_args.get(action, 0) |
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15 |
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16 if action.nargs in [OPTIONAL, ZERO_OR_MORE, REMAINDER]: |
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17 return True |
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18 if action.nargs == ONE_OR_MORE: |
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19 return num_consumed_args >= 1 |
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20 if action.nargs == PARSER: |
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21 # Not sure what this should be, but this previously always returned False |
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22 # so at least this won't break anything that wasn't already broken. |
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23 return False |
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24 if action.nargs is None: |
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25 return num_consumed_args == 1 |
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26 |
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27 assert isinstance(action.nargs, int), 'failed to handle a possible nargs value: %r' % action.nargs |
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28 return num_consumed_args == action.nargs |
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29 |
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30 |
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31 def action_is_open(action): |
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32 ''' Returns True if action could consume more arguments (i.e., its pattern is open). |
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33 ''' |
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34 num_consumed_args = _num_consumed_args.get(action, 0) |
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35 |
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36 if action.nargs in [ZERO_OR_MORE, ONE_OR_MORE, PARSER, REMAINDER]: |
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37 return True |
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38 if action.nargs == OPTIONAL or action.nargs is None: |
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39 return num_consumed_args == 0 |
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40 |
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41 assert isinstance(action.nargs, int), 'failed to handle a possible nargs value: %r' % action.nargs |
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42 return num_consumed_args < action.nargs |
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43 |
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44 |
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45 def action_is_greedy(action, isoptional=False): |
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46 ''' Returns True if action will necessarily consume the next argument. |
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47 isoptional indicates whether the argument is an optional (starts with -). |
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48 ''' |
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49 num_consumed_args = _num_consumed_args.get(action, 0) |
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50 |
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51 if action.option_strings: |
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52 if not isoptional and not action_is_satisfied(action): |
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53 return True |
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54 return action.nargs == REMAINDER |
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55 else: |
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56 return action.nargs == REMAINDER and num_consumed_args >= 1 |
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57 |
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58 |
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59 class IntrospectiveArgumentParser(ArgumentParser): |
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60 ''' The following is a verbatim copy of ArgumentParser._parse_known_args (Python 2.7.3), |
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61 except for the lines that contain the string "Added by argcomplete". |
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62 ''' |
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63 |
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64 def _parse_known_args(self, arg_strings, namespace): |
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65 _num_consumed_args.clear() # Added by argcomplete |
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66 self._argcomplete_namespace = namespace |
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67 self.active_actions = [] # Added by argcomplete |
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68 # replace arg strings that are file references |
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69 if self.fromfile_prefix_chars is not None: |
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70 arg_strings = self._read_args_from_files(arg_strings) |
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71 |
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72 # map all mutually exclusive arguments to the other arguments |
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73 # they can't occur with |
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74 action_conflicts = {} |
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75 self._action_conflicts = action_conflicts # Added by argcomplete |
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76 for mutex_group in self._mutually_exclusive_groups: |
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77 group_actions = mutex_group._group_actions |
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78 for i, mutex_action in enumerate(mutex_group._group_actions): |
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79 conflicts = action_conflicts.setdefault(mutex_action, []) |
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80 conflicts.extend(group_actions[:i]) |
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81 conflicts.extend(group_actions[i + 1:]) |
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82 |
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83 # find all option indices, and determine the arg_string_pattern |
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84 # which has an 'O' if there is an option at an index, |
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85 # an 'A' if there is an argument, or a '-' if there is a '--' |
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86 option_string_indices = {} |
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87 arg_string_pattern_parts = [] |
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88 arg_strings_iter = iter(arg_strings) |
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89 for i, arg_string in enumerate(arg_strings_iter): |
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90 |
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91 # all args after -- are non-options |
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92 if arg_string == '--': |
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93 arg_string_pattern_parts.append('-') |
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94 for arg_string in arg_strings_iter: |
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95 arg_string_pattern_parts.append('A') |
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96 |
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97 # otherwise, add the arg to the arg strings |
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98 # and note the index if it was an option |
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99 else: |
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100 option_tuple = self._parse_optional(arg_string) |
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101 if option_tuple is None: |
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102 pattern = 'A' |
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103 else: |
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104 option_string_indices[i] = option_tuple |
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105 pattern = 'O' |
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106 arg_string_pattern_parts.append(pattern) |
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107 |
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108 # join the pieces together to form the pattern |
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109 arg_strings_pattern = ''.join(arg_string_pattern_parts) |
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110 |
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111 # converts arg strings to the appropriate and then takes the action |
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112 seen_actions = set() |
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113 seen_non_default_actions = set() |
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114 self._seen_non_default_actions = seen_non_default_actions # Added by argcomplete |
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115 |
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116 def take_action(action, argument_strings, option_string=None): |
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117 seen_actions.add(action) |
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118 argument_values = self._get_values(action, argument_strings) |
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119 |
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120 # error if this argument is not allowed with other previously |
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121 # seen arguments, assuming that actions that use the default |
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122 # value don't really count as "present" |
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123 if argument_values is not action.default: |
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124 seen_non_default_actions.add(action) |
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125 for conflict_action in action_conflicts.get(action, []): |
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126 if conflict_action in seen_non_default_actions: |
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127 msg = _('not allowed with argument %s') |
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128 action_name = _get_action_name(conflict_action) |
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129 raise ArgumentError(action, msg % action_name) |
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130 |
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131 # take the action if we didn't receive a SUPPRESS value |
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132 # (e.g. from a default) |
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133 if argument_values is not SUPPRESS \ |
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134 or isinstance(action, _SubParsersAction): |
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135 try: |
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136 action(self, namespace, argument_values, option_string) |
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137 except: |
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138 # Begin added by argcomplete |
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139 # When a subparser action is taken and fails due to incomplete arguments, it does not merge the |
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140 # contents of its parsed namespace into the parent namespace. Do that here to allow completers to |
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141 # access the partially parsed arguments for the subparser. |
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142 if isinstance(action, _SubParsersAction): |
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143 subnamespace = action._name_parser_map[argument_values[0]]._argcomplete_namespace |
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144 for key, value in vars(subnamespace).items(): |
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145 setattr(namespace, key, value) |
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146 # End added by argcomplete |
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147 raise |
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148 |
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149 # function to convert arg_strings into an optional action |
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150 def consume_optional(start_index): |
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151 |
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152 # get the optional identified at this index |
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153 option_tuple = option_string_indices[start_index] |
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154 action, option_string, explicit_arg = option_tuple |
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155 |
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156 # identify additional optionals in the same arg string |
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157 # (e.g. -xyz is the same as -x -y -z if no args are required) |
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158 match_argument = self._match_argument |
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159 action_tuples = [] |
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160 while True: |
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161 |
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162 # if we found no optional action, skip it |
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163 if action is None: |
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164 extras.append(arg_strings[start_index]) |
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165 return start_index + 1 |
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166 |
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167 # if there is an explicit argument, try to match the |
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168 # optional's string arguments to only this |
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169 if explicit_arg is not None: |
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170 arg_count = match_argument(action, 'A') |
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171 |
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172 # if the action is a single-dash option and takes no |
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173 # arguments, try to parse more single-dash options out |
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174 # of the tail of the option string |
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175 chars = self.prefix_chars |
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176 if arg_count == 0 and option_string[1] not in chars: |
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177 action_tuples.append((action, [], option_string)) |
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178 char = option_string[0] |
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179 option_string = char + explicit_arg[0] |
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180 new_explicit_arg = explicit_arg[1:] or None |
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181 optionals_map = self._option_string_actions |
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182 if option_string in optionals_map: |
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183 action = optionals_map[option_string] |
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184 explicit_arg = new_explicit_arg |
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185 else: |
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186 msg = _('ignored explicit argument %r') |
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187 raise ArgumentError(action, msg % explicit_arg) |
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188 |
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189 # if the action expect exactly one argument, we've |
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190 # successfully matched the option; exit the loop |
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191 elif arg_count == 1: |
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192 stop = start_index + 1 |
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193 args = [explicit_arg] |
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194 action_tuples.append((action, args, option_string)) |
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195 break |
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196 |
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197 # error if a double-dash option did not use the |
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198 # explicit argument |
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199 else: |
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200 msg = _('ignored explicit argument %r') |
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201 raise ArgumentError(action, msg % explicit_arg) |
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202 |
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203 # if there is no explicit argument, try to match the |
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204 # optional's string arguments with the following strings |
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205 # if successful, exit the loop |
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206 else: |
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207 start = start_index + 1 |
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208 selected_patterns = arg_strings_pattern[start:] |
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209 self.active_actions = [action] # Added by argcomplete |
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210 _num_consumed_args[action] = 0 # Added by argcomplete |
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211 arg_count = match_argument(action, selected_patterns) |
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212 stop = start + arg_count |
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213 args = arg_strings[start:stop] |
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214 |
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215 # Begin added by argcomplete |
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216 # If the pattern is not open (e.g. no + at the end), remove the action from active actions (since |
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217 # it wouldn't be able to consume any more args) |
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218 _num_consumed_args[action] = len(args) |
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219 if not action_is_open(action): |
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220 self.active_actions.remove(action) |
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221 # End added by argcomplete |
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222 |
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223 action_tuples.append((action, args, option_string)) |
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224 break |
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225 |
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226 # add the Optional to the list and return the index at which |
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227 # the Optional's string args stopped |
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228 assert action_tuples |
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229 for action, args, option_string in action_tuples: |
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230 take_action(action, args, option_string) |
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231 return stop |
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232 |
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233 # the list of Positionals left to be parsed; this is modified |
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234 # by consume_positionals() |
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235 positionals = self._get_positional_actions() |
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236 |
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237 # function to convert arg_strings into positional actions |
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238 def consume_positionals(start_index): |
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239 # match as many Positionals as possible |
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240 match_partial = self._match_arguments_partial |
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241 selected_pattern = arg_strings_pattern[start_index:] |
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242 arg_counts = match_partial(positionals, selected_pattern) |
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243 |
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244 # slice off the appropriate arg strings for each Positional |
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245 # and add the Positional and its args to the list |
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246 for action, arg_count in zip(positionals, arg_counts): # Added by argcomplete |
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247 self.active_actions.append(action) # Added by argcomplete |
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248 for action, arg_count in zip(positionals, arg_counts): |
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249 args = arg_strings[start_index: start_index + arg_count] |
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250 start_index += arg_count |
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251 _num_consumed_args[action] = len(args) # Added by argcomplete |
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252 take_action(action, args) |
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253 |
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254 # slice off the Positionals that we just parsed and return the |
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255 # index at which the Positionals' string args stopped |
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256 positionals[:] = positionals[len(arg_counts):] |
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257 return start_index |
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258 |
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259 # consume Positionals and Optionals alternately, until we have |
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260 # passed the last option string |
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261 extras = [] |
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262 start_index = 0 |
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263 if option_string_indices: |
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264 max_option_string_index = max(option_string_indices) |
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265 else: |
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266 max_option_string_index = -1 |
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267 while start_index <= max_option_string_index: |
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268 |
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269 # consume any Positionals preceding the next option |
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270 next_option_string_index = min([ |
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271 index |
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272 for index in option_string_indices |
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273 if index >= start_index]) |
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274 if start_index != next_option_string_index: |
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275 positionals_end_index = consume_positionals(start_index) |
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276 |
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277 # only try to parse the next optional if we didn't consume |
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278 # the option string during the positionals parsing |
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279 if positionals_end_index > start_index: |
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280 start_index = positionals_end_index |
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281 continue |
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282 else: |
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283 start_index = positionals_end_index |
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284 |
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285 # if we consumed all the positionals we could and we're not |
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286 # at the index of an option string, there were extra arguments |
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287 if start_index not in option_string_indices: |
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288 strings = arg_strings[start_index:next_option_string_index] |
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289 extras.extend(strings) |
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290 start_index = next_option_string_index |
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291 |
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292 # consume the next optional and any arguments for it |
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293 start_index = consume_optional(start_index) |
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294 |
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295 # consume any positionals following the last Optional |
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296 stop_index = consume_positionals(start_index) |
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297 |
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298 # if we didn't consume all the argument strings, there were extras |
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299 extras.extend(arg_strings[stop_index:]) |
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300 |
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301 # if we didn't use all the Positional objects, there were too few |
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302 # arg strings supplied. |
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303 |
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304 if positionals: |
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305 self.active_actions.append(positionals[0]) # Added by argcomplete |
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306 self.error(_('too few arguments')) |
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307 |
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308 # make sure all required actions were present |
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309 for action in self._actions: |
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310 if action.required: |
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311 if action not in seen_actions: |
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312 name = _get_action_name(action) |
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313 self.error(_('argument %s is required') % name) |
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314 |
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315 # make sure all required groups had one option present |
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316 for group in self._mutually_exclusive_groups: |
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317 if group.required: |
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318 for action in group._group_actions: |
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319 if action in seen_non_default_actions: |
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320 break |
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321 |
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322 # if no actions were used, report the error |
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323 else: |
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324 names = [_get_action_name(action) |
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325 for action in group._group_actions |
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326 if action.help is not SUPPRESS] |
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327 msg = _('one of the arguments %s is required') |
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328 self.error(msg % ' '.join(names)) |
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329 |
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330 # return the updated namespace and the extra arguments |
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331 return namespace, extras |