Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/argcomplete/__init__.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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 __future__ import absolute_import, division, print_function, unicode_literals |
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5 |
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6 import os, sys, argparse, contextlib |
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7 from . import completers, my_shlex as shlex |
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8 from .compat import USING_PYTHON2, str, sys_encoding, ensure_str, ensure_bytes |
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9 from .completers import FilesCompleter, SuppressCompleter |
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10 from .my_argparse import IntrospectiveArgumentParser, action_is_satisfied, action_is_open, action_is_greedy |
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11 from .shell_integration import shellcode |
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12 |
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13 _DEBUG = "_ARC_DEBUG" in os.environ |
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14 |
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15 debug_stream = sys.stderr |
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16 |
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17 def debug(*args): |
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18 if _DEBUG: |
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19 if USING_PYTHON2: |
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20 # debug_stream has to be binary mode in Python 2. |
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21 # Attempting to write unicode directly uses the default ascii conversion. |
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22 # Convert any unicode to bytes, leaving non-string input alone. |
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23 args = [ensure_bytes(x) if isinstance(x, str) else x for x in args] |
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24 print(file=debug_stream, *args) |
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25 |
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26 BASH_FILE_COMPLETION_FALLBACK = 79 |
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27 BASH_DIR_COMPLETION_FALLBACK = 80 |
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28 |
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29 safe_actions = (argparse._StoreAction, |
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30 argparse._StoreConstAction, |
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31 argparse._StoreTrueAction, |
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32 argparse._StoreFalseAction, |
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33 argparse._AppendAction, |
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34 argparse._AppendConstAction, |
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35 argparse._CountAction) |
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36 |
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37 @contextlib.contextmanager |
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38 def mute_stdout(): |
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39 stdout = sys.stdout |
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40 sys.stdout = open(os.devnull, "w") |
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41 try: |
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42 yield |
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43 finally: |
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44 sys.stdout = stdout |
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45 |
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46 @contextlib.contextmanager |
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47 def mute_stderr(): |
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48 stderr = sys.stderr |
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49 sys.stderr = open(os.devnull, "w") |
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50 try: |
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51 yield |
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52 finally: |
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53 sys.stderr.close() |
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54 sys.stderr = stderr |
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55 |
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56 class ArgcompleteException(Exception): |
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57 pass |
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58 |
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59 def split_line(line, point=None): |
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60 if point is None: |
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61 point = len(line) |
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62 lexer = shlex.shlex(line, posix=True) |
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63 lexer.whitespace_split = True |
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64 lexer.wordbreaks = os.environ.get("_ARGCOMPLETE_COMP_WORDBREAKS", "") |
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65 words = [] |
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66 |
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67 def split_word(word): |
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68 # TODO: make this less ugly |
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69 point_in_word = len(word) + point - lexer.instream.tell() |
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70 if isinstance(lexer.state, (str, bytes)) and lexer.state in lexer.whitespace: |
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71 point_in_word += 1 |
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72 if point_in_word > len(word): |
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73 debug("In trailing whitespace") |
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74 words.append(word) |
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75 word = "" |
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76 prefix, suffix = word[:point_in_word], word[point_in_word:] |
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77 prequote = "" |
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78 # posix |
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79 if lexer.state is not None and lexer.state in lexer.quotes: |
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80 prequote = lexer.state |
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81 # non-posix |
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82 # if len(prefix) > 0 and prefix[0] in lexer.quotes: |
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83 # prequote, prefix = prefix[0], prefix[1:] |
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84 |
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85 return prequote, prefix, suffix, words, lexer.last_wordbreak_pos |
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86 |
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87 while True: |
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88 try: |
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89 word = lexer.get_token() |
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90 if word == lexer.eof: |
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91 # TODO: check if this is ever unsafe |
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92 # raise ArgcompleteException("Unexpected end of input") |
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93 return "", "", "", words, None |
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94 if lexer.instream.tell() >= point: |
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95 debug("word", word, "split, lexer state: '{s}'".format(s=lexer.state)) |
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96 return split_word(word) |
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97 words.append(word) |
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98 except ValueError: |
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99 debug("word", lexer.token, "split (lexer stopped, state: '{s}')".format(s=lexer.state)) |
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100 if lexer.instream.tell() >= point: |
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101 return split_word(lexer.token) |
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102 else: |
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103 msg = ("Unexpected internal state. " |
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104 "Please report this bug at https://github.com/kislyuk/argcomplete/issues.") |
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105 raise ArgcompleteException(msg) |
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106 |
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107 def default_validator(completion, prefix): |
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108 return completion.startswith(prefix) |
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109 |
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110 class CompletionFinder(object): |
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111 """ |
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112 Inherit from this class if you wish to override any of the stages below. Otherwise, use |
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113 ``argcomplete.autocomplete()`` directly (it's a convenience instance of this class). It has the same signature as |
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114 :meth:`CompletionFinder.__call__()`. |
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115 """ |
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116 def __init__(self, argument_parser=None, always_complete_options=True, exclude=None, validator=None, |
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117 print_suppressed=False, default_completer=FilesCompleter(), append_space=None): |
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118 self._parser = argument_parser |
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119 self.always_complete_options = always_complete_options |
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120 self.exclude = exclude |
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121 if validator is None: |
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122 validator = default_validator |
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123 self.validator = validator |
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124 self.print_suppressed = print_suppressed |
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125 self.completing = False |
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126 self._display_completions = {} |
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127 self.default_completer = default_completer |
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128 if append_space is None: |
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129 append_space = os.environ.get("_ARGCOMPLETE_SUPPRESS_SPACE") != "1" |
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130 self.append_space = append_space |
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131 |
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132 def __call__(self, argument_parser, always_complete_options=True, exit_method=os._exit, output_stream=None, |
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133 exclude=None, validator=None, print_suppressed=False, append_space=None, |
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134 default_completer=FilesCompleter()): |
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135 """ |
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136 :param argument_parser: The argument parser to autocomplete on |
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137 :type argument_parser: :class:`argparse.ArgumentParser` |
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138 :param always_complete_options: |
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139 Controls the autocompletion of option strings if an option string opening character (normally ``-``) has not |
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140 been entered. If ``True`` (default), both short (``-x``) and long (``--x``) option strings will be |
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141 suggested. If ``False``, no option strings will be suggested. If ``long``, long options and short options |
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142 with no long variant will be suggested. If ``short``, short options and long options with no short variant |
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143 will be suggested. |
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144 :type always_complete_options: boolean or string |
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145 :param exit_method: |
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146 Method used to stop the program after printing completions. Defaults to :meth:`os._exit`. If you want to |
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147 perform a normal exit that calls exit handlers, use :meth:`sys.exit`. |
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148 :type exit_method: callable |
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149 :param exclude: List of strings representing options to be omitted from autocompletion |
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150 :type exclude: iterable |
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151 :param validator: |
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152 Function to filter all completions through before returning (called with two string arguments, completion |
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153 and prefix; return value is evaluated as a boolean) |
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154 :type validator: callable |
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155 :param print_suppressed: |
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156 Whether or not to autocomplete options that have the ``help=argparse.SUPPRESS`` keyword argument set. |
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157 :type print_suppressed: boolean |
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158 :param append_space: |
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159 Whether to append a space to unique matches. The default is ``True``. |
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160 :type append_space: boolean |
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161 |
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162 .. note:: |
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163 If you are not subclassing CompletionFinder to override its behaviors, |
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164 use ``argcomplete.autocomplete()`` directly. It has the same signature as this method. |
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165 |
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166 Produces tab completions for ``argument_parser``. See module docs for more info. |
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167 |
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168 Argcomplete only executes actions if their class is known not to have side effects. Custom action classes can be |
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169 added to argcomplete.safe_actions, if their values are wanted in the ``parsed_args`` completer argument, or |
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170 their execution is otherwise desirable. |
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171 """ |
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172 self.__init__(argument_parser, always_complete_options=always_complete_options, exclude=exclude, |
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173 validator=validator, print_suppressed=print_suppressed, append_space=append_space, |
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174 default_completer=default_completer) |
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175 |
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176 if "_ARGCOMPLETE" not in os.environ: |
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177 # not an argument completion invocation |
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178 return |
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179 |
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180 global debug_stream |
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181 try: |
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182 debug_stream = os.fdopen(9, "w") |
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183 except: |
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184 debug_stream = sys.stderr |
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185 debug() |
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186 |
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187 if output_stream is None: |
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188 filename = os.environ.get("_ARGCOMPLETE_STDOUT_FILENAME") |
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189 if filename is not None: |
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190 debug("Using output file {}".format(filename)) |
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191 output_stream = open(filename, "wb") |
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192 |
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193 if output_stream is None: |
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194 try: |
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195 output_stream = os.fdopen(8, "wb") |
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196 except: |
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197 debug("Unable to open fd 8 for writing, quitting") |
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198 exit_method(1) |
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199 |
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200 # print("", stream=debug_stream) |
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201 # for v in "COMP_CWORD COMP_LINE COMP_POINT COMP_TYPE COMP_KEY _ARGCOMPLETE_COMP_WORDBREAKS COMP_WORDS".split(): |
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202 # print(v, os.environ[v], stream=debug_stream) |
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203 |
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204 ifs = os.environ.get("_ARGCOMPLETE_IFS", "\013") |
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205 if len(ifs) != 1: |
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206 debug("Invalid value for IFS, quitting [{v}]".format(v=ifs)) |
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207 exit_method(1) |
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208 |
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209 dfs = os.environ.get("_ARGCOMPLETE_DFS") |
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210 if dfs and len(dfs) != 1: |
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211 debug("Invalid value for DFS, quitting [{v}]".format(v=dfs)) |
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212 exit_method(1) |
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213 |
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214 comp_line = os.environ["COMP_LINE"] |
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215 comp_point = int(os.environ["COMP_POINT"]) |
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216 |
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217 comp_line = ensure_str(comp_line) |
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218 cword_prequote, cword_prefix, cword_suffix, comp_words, last_wordbreak_pos = split_line(comp_line, comp_point) |
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219 |
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220 # _ARGCOMPLETE is set by the shell script to tell us where comp_words |
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221 # should start, based on what we're completing. |
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222 # 1: <script> [args] |
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223 # 2: python <script> [args] |
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224 # 3: python -m <module> [args] |
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225 start = int(os.environ["_ARGCOMPLETE"]) - 1 |
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226 comp_words = comp_words[start:] |
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227 |
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228 if cword_prefix and cword_prefix[0] in self._parser.prefix_chars and "=" in cword_prefix: |
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229 # Special case for when the current word is "--optional=PARTIAL_VALUE". Give the optional to the parser. |
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230 comp_words.append(cword_prefix.split("=", 1)[0]) |
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231 |
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232 debug("\nLINE: {!r}".format(comp_line), |
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233 "\nPOINT: {!r}".format(comp_point), |
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234 "\nPREQUOTE: {!r}".format(cword_prequote), |
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235 "\nPREFIX: {!r}".format(cword_prefix), |
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236 "\nSUFFIX: {!r}".format(cword_suffix), |
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237 "\nWORDS:", comp_words) |
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238 |
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239 completions = self._get_completions(comp_words, cword_prefix, cword_prequote, last_wordbreak_pos) |
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240 |
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241 if dfs: |
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242 display_completions = {key_part: value.replace(ifs, " ") if value else "" |
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243 for key, value in self._display_completions.items() |
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244 for key_part in key} |
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245 completions = [dfs.join((key, display_completions.get(key) or "")) for key in completions] |
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246 |
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247 debug("\nReturning completions:", completions) |
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248 output_stream.write(ifs.join(completions).encode(sys_encoding)) |
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249 output_stream.flush() |
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250 debug_stream.flush() |
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251 exit_method(0) |
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252 |
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253 def _get_completions(self, comp_words, cword_prefix, cword_prequote, last_wordbreak_pos): |
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254 active_parsers = self._patch_argument_parser() |
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255 |
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256 parsed_args = argparse.Namespace() |
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257 self.completing = True |
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258 |
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259 if USING_PYTHON2: |
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260 # Python 2 argparse only properly works with byte strings. |
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261 comp_words = [ensure_bytes(word) for word in comp_words] |
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262 |
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263 try: |
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264 debug("invoking parser with", comp_words[1:]) |
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265 with mute_stderr(): |
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266 a = self._parser.parse_known_args(comp_words[1:], namespace=parsed_args) |
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267 debug("parsed args:", a) |
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268 except BaseException as e: |
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269 debug("\nexception", type(e), str(e), "while parsing args") |
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270 |
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271 self.completing = False |
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272 |
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273 if "--" in comp_words: |
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274 self.always_complete_options = False |
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275 |
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276 completions = self.collect_completions(active_parsers, parsed_args, cword_prefix, debug) |
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277 completions = self.filter_completions(completions) |
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278 completions = self.quote_completions(completions, cword_prequote, last_wordbreak_pos) |
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279 return completions |
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280 |
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281 def _patch_argument_parser(self): |
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282 """ |
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283 Since argparse doesn't support much introspection, we monkey-patch it to replace the parse_known_args method and |
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284 all actions with hooks that tell us which action was last taken or about to be taken, and let us have the parser |
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285 figure out which subparsers need to be activated (then recursively monkey-patch those). |
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286 We save all active ArgumentParsers to extract all their possible option names later. |
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287 """ |
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288 self.active_parsers = [] |
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289 self.visited_positionals = [] |
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290 |
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291 completer = self |
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292 |
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293 def patch(parser): |
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294 completer.visited_positionals.append(parser) |
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295 completer.active_parsers.append(parser) |
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296 |
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297 if isinstance(parser, IntrospectiveArgumentParser): |
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298 return |
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299 |
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300 classname = "MonkeyPatchedIntrospectiveArgumentParser" |
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301 if USING_PYTHON2: |
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302 classname = bytes(classname) |
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303 parser.__class__ = type(classname, (IntrospectiveArgumentParser, parser.__class__), {}) |
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304 |
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305 for action in parser._actions: |
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306 |
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307 if hasattr(action, "_orig_class"): |
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308 continue |
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309 |
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310 # TODO: accomplish this with super |
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311 class IntrospectAction(action.__class__): |
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312 def __call__(self, parser, namespace, values, option_string=None): |
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313 debug("Action stub called on", self) |
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314 debug("\targs:", parser, namespace, values, option_string) |
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315 debug("\torig class:", self._orig_class) |
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316 debug("\torig callable:", self._orig_callable) |
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317 |
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318 if not completer.completing: |
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319 self._orig_callable(parser, namespace, values, option_string=option_string) |
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320 elif issubclass(self._orig_class, argparse._SubParsersAction): |
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321 debug("orig class is a subparsers action: patching and running it") |
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322 patch(self._name_parser_map[values[0]]) |
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323 self._orig_callable(parser, namespace, values, option_string=option_string) |
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324 elif self._orig_class in safe_actions: |
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325 if not self.option_strings: |
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326 completer.visited_positionals.append(self) |
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327 |
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328 self._orig_callable(parser, namespace, values, option_string=option_string) |
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329 |
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330 action._orig_class = action.__class__ |
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331 action._orig_callable = action.__call__ |
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332 action.__class__ = IntrospectAction |
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333 |
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334 patch(self._parser) |
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335 |
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336 debug("Active parsers:", self.active_parsers) |
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337 debug("Visited positionals:", self.visited_positionals) |
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338 |
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339 return self.active_parsers |
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340 |
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341 def _get_subparser_completions(self, parser, cword_prefix): |
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342 def filter_aliases(aliases, prefix): |
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343 return tuple(x for x in aliases if x.startswith(prefix)) |
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344 |
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345 aliases_by_parser = {} |
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346 for key in parser.choices.keys(): |
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347 p = parser.choices[key] |
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348 aliases_by_parser.setdefault(p, []).append(key) |
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349 |
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350 for action in parser._get_subactions(): |
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351 subcmd_with_aliases = filter_aliases(aliases_by_parser[parser.choices[action.dest]], cword_prefix) |
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352 if subcmd_with_aliases: |
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353 self._display_completions[subcmd_with_aliases] = action.help |
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354 |
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355 completions = [subcmd for subcmd in parser.choices.keys() if subcmd.startswith(cword_prefix)] |
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356 return completions |
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357 |
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358 def _include_options(self, action, cword_prefix): |
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359 if len(cword_prefix) > 0 or self.always_complete_options is True: |
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360 return [ensure_str(opt) for opt in action.option_strings if ensure_str(opt).startswith(cword_prefix)] |
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361 long_opts = [ensure_str(opt) for opt in action.option_strings if len(opt) > 2] |
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362 short_opts = [ensure_str(opt) for opt in action.option_strings if len(opt) <= 2] |
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363 if self.always_complete_options == "long": |
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364 return long_opts if long_opts else short_opts |
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365 elif self.always_complete_options == "short": |
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366 return short_opts if short_opts else long_opts |
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367 return [] |
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368 |
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369 def _get_option_completions(self, parser, cword_prefix): |
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370 self._display_completions.update( |
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371 [[tuple(ensure_str(x) for x in action.option_strings |
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372 if ensure_str(x).startswith(cword_prefix)), action.help] |
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373 for action in parser._actions |
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374 if action.option_strings]) |
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375 |
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376 option_completions = [] |
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377 for action in parser._actions: |
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378 if not self.print_suppressed: |
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379 completer = getattr(action, "completer", None) |
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380 if isinstance(completer, SuppressCompleter) and completer.suppress(): |
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381 continue |
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382 if action.help == argparse.SUPPRESS: |
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383 continue |
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384 if not self._action_allowed(action, parser): |
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385 continue |
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386 if not isinstance(action, argparse._SubParsersAction): |
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387 option_completions += self._include_options(action, cword_prefix) |
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388 return option_completions |
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389 |
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390 @staticmethod |
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391 def _action_allowed(action, parser): |
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392 # Logic adapted from take_action in ArgumentParser._parse_known_args |
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393 # (members are saved by my_argparse.IntrospectiveArgumentParser) |
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394 for conflict_action in parser._action_conflicts.get(action, []): |
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395 if conflict_action in parser._seen_non_default_actions: |
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396 return False |
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397 return True |
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398 |
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399 def _complete_active_option(self, parser, next_positional, cword_prefix, parsed_args, completions): |
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400 debug("Active actions (L={l}): {a}".format(l=len(parser.active_actions), a=parser.active_actions)) |
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401 |
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402 isoptional = cword_prefix and cword_prefix[0] in parser.prefix_chars |
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403 optional_prefix = "" |
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404 greedy_actions = [x for x in parser.active_actions if action_is_greedy(x, isoptional)] |
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405 if greedy_actions: |
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406 assert len(greedy_actions) == 1, "expect at most 1 greedy action" |
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407 # This means the action will fail to parse if the word under the cursor is not given |
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408 # to it, so give it exclusive control over completions (flush previous completions) |
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409 debug("Resetting completions because", greedy_actions[0], "must consume the next argument") |
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410 self._display_completions = {} |
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411 completions = [] |
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412 elif isoptional: |
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413 if "=" in cword_prefix: |
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414 # Special case for when the current word is "--optional=PARTIAL_VALUE". |
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415 # The completer runs on PARTIAL_VALUE. The prefix is added back to the completions |
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416 # (and chopped back off later in quote_completions() by the COMP_WORDBREAKS logic). |
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417 optional_prefix, _, cword_prefix = cword_prefix.partition("=") |
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418 else: |
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419 # Only run completers if current word does not start with - (is not an optional) |
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420 return completions |
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421 |
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422 complete_remaining_positionals = False |
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423 # Use the single greedy action (if there is one) or all active actions. |
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424 for active_action in greedy_actions or parser.active_actions: |
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425 if not active_action.option_strings: # action is a positional |
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426 if action_is_open(active_action): |
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427 # Any positional arguments after this may slide down into this action |
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428 # if more arguments are added (since the user may not be done yet), |
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429 # so it is extremely difficult to tell which completers to run. |
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430 # Running all remaining completers will probably show more than the user wants |
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431 # but it also guarantees we won't miss anything. |
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432 complete_remaining_positionals = True |
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433 if not complete_remaining_positionals: |
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434 if action_is_satisfied(active_action) and not action_is_open(active_action): |
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435 debug("Skipping", active_action) |
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436 continue |
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437 |
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438 debug("Activating completion for", active_action, active_action._orig_class) |
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439 # completer = getattr(active_action, "completer", DefaultCompleter()) |
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440 completer = getattr(active_action, "completer", None) |
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441 |
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442 if completer is None: |
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443 if active_action.choices is not None and not isinstance(active_action, argparse._SubParsersAction): |
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444 completer = completers.ChoicesCompleter(active_action.choices) |
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445 elif not isinstance(active_action, argparse._SubParsersAction): |
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446 completer = self.default_completer |
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447 |
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448 if completer: |
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449 if isinstance(completer, SuppressCompleter) and completer.suppress(): |
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450 continue |
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451 |
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452 if callable(completer): |
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453 completions_from_callable = [c for c in completer( |
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454 prefix=cword_prefix, action=active_action, parser=parser, parsed_args=parsed_args) |
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455 if self.validator(c, cword_prefix)] |
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456 |
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457 if completions_from_callable: |
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458 completions += completions_from_callable |
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459 if isinstance(completer, completers.ChoicesCompleter): |
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460 self._display_completions.update( |
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461 [[(x,), active_action.help] for x in completions_from_callable]) |
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462 else: |
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463 self._display_completions.update( |
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464 [[(x,), ""] for x in completions_from_callable]) |
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465 else: |
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466 debug("Completer is not callable, trying the readline completer protocol instead") |
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467 for i in range(9999): |
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468 next_completion = completer.complete(cword_prefix, i) |
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469 if next_completion is None: |
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470 break |
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471 if self.validator(next_completion, cword_prefix): |
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472 self._display_completions.update({(next_completion,): ""}) |
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473 completions.append(next_completion) |
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474 if optional_prefix: |
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475 completions = [optional_prefix + "=" + completion for completion in completions] |
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476 debug("Completions:", completions) |
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477 return completions |
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478 |
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479 def collect_completions(self, active_parsers, parsed_args, cword_prefix, debug): |
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480 """ |
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481 Visits the active parsers and their actions, executes their completers or introspects them to collect their |
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482 option strings. Returns the resulting completions as a list of strings. |
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483 |
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484 This method is exposed for overriding in subclasses; there is no need to use it directly. |
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485 """ |
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486 completions = [] |
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487 |
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488 debug("all active parsers:", active_parsers) |
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489 active_parser = active_parsers[-1] |
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490 debug("active_parser:", active_parser) |
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491 if self.always_complete_options or (len(cword_prefix) > 0 and cword_prefix[0] in active_parser.prefix_chars): |
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492 completions += self._get_option_completions(active_parser, cword_prefix) |
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493 debug("optional options:", completions) |
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494 |
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495 next_positional = self._get_next_positional() |
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496 debug("next_positional:", next_positional) |
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497 |
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498 if isinstance(next_positional, argparse._SubParsersAction): |
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499 completions += self._get_subparser_completions(next_positional, cword_prefix) |
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500 |
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501 completions = self._complete_active_option(active_parser, next_positional, cword_prefix, parsed_args, |
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502 completions) |
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503 debug("active options:", completions) |
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504 debug("display completions:", self._display_completions) |
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505 |
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506 return completions |
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507 |
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508 def _get_next_positional(self): |
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509 """ |
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510 Get the next positional action if it exists. |
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511 """ |
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512 active_parser = self.active_parsers[-1] |
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513 last_positional = self.visited_positionals[-1] |
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514 |
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515 all_positionals = active_parser._get_positional_actions() |
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516 if not all_positionals: |
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517 return None |
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518 |
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519 if active_parser == last_positional: |
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520 return all_positionals[0] |
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521 |
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522 i = 0 |
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523 for i in range(len(all_positionals)): |
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524 if all_positionals[i] == last_positional: |
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525 break |
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526 |
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527 if i + 1 < len(all_positionals): |
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528 return all_positionals[i + 1] |
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529 |
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530 return None |
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531 |
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532 def filter_completions(self, completions): |
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533 """ |
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534 Ensures collected completions are Unicode text, de-duplicates them, and excludes those specified by ``exclude``. |
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535 Returns the filtered completions as an iterable. |
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536 |
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537 This method is exposed for overriding in subclasses; there is no need to use it directly. |
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538 """ |
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539 # On Python 2, we have to make sure all completions are unicode objects before we continue and output them. |
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540 # Otherwise, because python disobeys the system locale encoding and uses ascii as the default encoding, it will |
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541 # try to implicitly decode string objects using ascii, and fail. |
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542 completions = [ensure_str(c) for c in completions] |
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543 |
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544 # De-duplicate completions and remove excluded ones |
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545 if self.exclude is None: |
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546 self.exclude = set() |
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547 seen = set(self.exclude) |
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548 return [c for c in completions if c not in seen and not seen.add(c)] |
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549 |
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550 def quote_completions(self, completions, cword_prequote, last_wordbreak_pos): |
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551 """ |
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552 If the word under the cursor started with a quote (as indicated by a nonempty ``cword_prequote``), escapes |
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553 occurrences of that quote character in the completions, and adds the quote to the beginning of each completion. |
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554 Otherwise, escapes all characters that bash splits words on (``COMP_WORDBREAKS``), and removes portions of |
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555 completions before the first colon if (``COMP_WORDBREAKS``) contains a colon. |
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556 |
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557 If there is only one completion, and it doesn't end with a **continuation character** (``/``, ``:``, or ``=``), |
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558 adds a space after the completion. |
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559 |
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560 This method is exposed for overriding in subclasses; there is no need to use it directly. |
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561 """ |
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562 special_chars = "\\" |
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563 # If the word under the cursor was quoted, escape the quote char. |
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564 # Otherwise, escape all special characters and specially handle all COMP_WORDBREAKS chars. |
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565 if cword_prequote == "": |
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566 # Bash mangles completions which contain characters in COMP_WORDBREAKS. |
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567 # This workaround has the same effect as __ltrim_colon_completions in bash_completion |
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568 # (extended to characters other than the colon). |
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569 if last_wordbreak_pos: |
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570 completions = [c[last_wordbreak_pos + 1:] for c in completions] |
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571 special_chars += "();<>|&!`$* \t\n\"'" |
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572 elif cword_prequote == '"': |
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573 special_chars += '"`$!' |
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574 |
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575 if os.environ.get("_ARGCOMPLETE_SHELL") in ("tcsh", "fish"): |
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576 # tcsh and fish escapes special characters itself. |
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577 special_chars = "" |
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578 elif cword_prequote == "'": |
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579 # Nothing can be escaped in single quotes, so we need to close |
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580 # the string, escape the single quote, then open a new string. |
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581 special_chars = "" |
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582 completions = [c.replace("'", r"'\''") for c in completions] |
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583 |
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584 for char in special_chars: |
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585 completions = [c.replace(char, "\\" + char) for c in completions] |
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586 |
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587 if self.append_space: |
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588 # Similar functionality in bash was previously turned off by supplying the "-o nospace" option to complete. |
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589 # Now it is conditionally disabled using "compopt -o nospace" if the match ends in a continuation character. |
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590 # This code is retained for environments where this isn't done natively. |
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591 continuation_chars = "=/:" |
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592 if len(completions) == 1 and completions[0][-1] not in continuation_chars: |
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593 if cword_prequote == "": |
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594 completions[0] += " " |
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595 |
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596 return completions |
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597 |
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598 def rl_complete(self, text, state): |
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599 """ |
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600 Alternate entry point for using the argcomplete completer in a readline-based REPL. See also |
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601 `rlcompleter <https://docs.python.org/2/library/rlcompleter.html#completer-objects>`_. |
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602 Usage: |
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603 |
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604 .. code-block:: python |
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605 |
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606 import argcomplete, argparse, readline |
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607 parser = argparse.ArgumentParser() |
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608 ... |
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609 completer = argcomplete.CompletionFinder(parser) |
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610 readline.set_completer_delims("") |
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611 readline.set_completer(completer.rl_complete) |
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612 readline.parse_and_bind("tab: complete") |
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613 result = input("prompt> ") |
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614 |
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615 (Use ``raw_input`` instead of ``input`` on Python 2, or use `eight <https://github.com/kislyuk/eight>`_). |
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616 """ |
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617 if state == 0: |
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618 cword_prequote, cword_prefix, cword_suffix, comp_words, first_colon_pos = split_line(text) |
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619 comp_words.insert(0, sys.argv[0]) |
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620 matches = self._get_completions(comp_words, cword_prefix, cword_prequote, first_colon_pos) |
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621 self._rl_matches = [text + match[len(cword_prefix):] for match in matches] |
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622 |
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623 if state < len(self._rl_matches): |
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624 return self._rl_matches[state] |
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625 else: |
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626 return None |
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627 |
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628 def get_display_completions(self): |
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629 """ |
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630 This function returns a mapping of option names to their help strings for displaying to the user |
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631 |
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632 Usage: |
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633 |
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634 .. code-block:: python |
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635 |
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636 def display_completions(substitution, matches, longest_match_length): |
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637 _display_completions = argcomplete.autocomplete.get_display_completions() |
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638 print("") |
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639 if _display_completions: |
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640 help_len = [len(x) for x in _display_completions.values() if x] |
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641 |
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642 if help_len: |
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643 maxlen = max([len(x) for x in _display_completions]) |
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644 print("\\n".join("{0:{2}} -- {1}".format(k, v, maxlen) |
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645 for k, v in sorted(_display_completions.items()))) |
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646 else: |
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647 print(" ".join(k for k in sorted(_display_completions))) |
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648 else: |
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649 print(" ".join(x for x in sorted(matches))) |
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650 |
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651 import readline |
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652 print("cli /> {0}".format(readline.get_line_buffer()), end="") |
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653 readline.redisplay() |
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654 |
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655 ... |
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656 readline.set_completion_display_matches_hook(display_completions) |
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657 |
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658 """ |
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659 return {" ".join(k): v for k, v in self._display_completions.items()} |
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660 |
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661 class ExclusiveCompletionFinder(CompletionFinder): |
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662 @staticmethod |
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663 def _action_allowed(action, parser): |
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664 if not CompletionFinder._action_allowed(action, parser): |
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665 return False |
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666 |
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667 append_classes = (argparse._AppendAction, argparse._AppendConstAction) |
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668 if action._orig_class in append_classes: |
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669 return True |
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670 |
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671 if action not in parser._seen_non_default_actions: |
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672 return True |
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673 |
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674 return False |
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675 |
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676 autocomplete = CompletionFinder() |
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677 autocomplete.__doc__ = """ Use this to access argcomplete. See :meth:`argcomplete.CompletionFinder.__call__()`. """ |
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678 |
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679 def warn(*args): |
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680 """ |
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681 Prints **args** to standard error when running completions. This will interrupt the user's command line interaction; |
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682 use it to indicate an error condition that is preventing your completer from working. |
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683 """ |
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684 print("\n", file=debug_stream, *args) |