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annotate lib/python3.8/site-packages/pip/_internal/cli/autocompletion.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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1 """Logic that powers autocompletion installed by ``pip completion``.
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2 """
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3
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4 import optparse
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5 import os
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6 import sys
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7 from itertools import chain
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8
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9 from pip._internal.cli.main_parser import create_main_parser
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10 from pip._internal.commands import commands_dict, create_command
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11 from pip._internal.utils.misc import get_installed_distributions
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12 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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13
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14 if MYPY_CHECK_RUNNING:
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15 from typing import Any, Iterable, List, Optional
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16
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17
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18 def autocomplete():
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19 # type: () -> None
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20 """Entry Point for completion of main and subcommand options.
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21 """
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22 # Don't complete if user hasn't sourced bash_completion file.
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23 if 'PIP_AUTO_COMPLETE' not in os.environ:
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24 return
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25 cwords = os.environ['COMP_WORDS'].split()[1:]
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26 cword = int(os.environ['COMP_CWORD'])
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27 try:
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28 current = cwords[cword - 1]
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29 except IndexError:
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30 current = ''
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31
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32 parser = create_main_parser()
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33 subcommands = list(commands_dict)
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34 options = []
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35
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36 # subcommand
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37 subcommand_name = None # type: Optional[str]
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38 for word in cwords:
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39 if word in subcommands:
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40 subcommand_name = word
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41 break
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42 # subcommand options
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43 if subcommand_name is not None:
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44 # special case: 'help' subcommand has no options
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45 if subcommand_name == 'help':
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46 sys.exit(1)
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47 # special case: list locally installed dists for show and uninstall
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48 should_list_installed = (
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49 subcommand_name in ['show', 'uninstall'] and
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50 not current.startswith('-')
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51 )
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52 if should_list_installed:
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53 installed = []
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54 lc = current.lower()
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55 for dist in get_installed_distributions(local_only=True):
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56 if dist.key.startswith(lc) and dist.key not in cwords[1:]:
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57 installed.append(dist.key)
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58 # if there are no dists installed, fall back to option completion
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59 if installed:
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60 for dist in installed:
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61 print(dist)
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62 sys.exit(1)
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63
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64 subcommand = create_command(subcommand_name)
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65
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66 for opt in subcommand.parser.option_list_all:
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67 if opt.help != optparse.SUPPRESS_HELP:
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68 for opt_str in opt._long_opts + opt._short_opts:
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69 options.append((opt_str, opt.nargs))
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70
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71 # filter out previously specified options from available options
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72 prev_opts = [x.split('=')[0] for x in cwords[1:cword - 1]]
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73 options = [(x, v) for (x, v) in options if x not in prev_opts]
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74 # filter options by current input
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75 options = [(k, v) for k, v in options if k.startswith(current)]
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76 # get completion type given cwords and available subcommand options
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77 completion_type = get_path_completion_type(
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78 cwords, cword, subcommand.parser.option_list_all,
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79 )
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80 # get completion files and directories if ``completion_type`` is
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81 # ``<file>``, ``<dir>`` or ``<path>``
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82 if completion_type:
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83 paths = auto_complete_paths(current, completion_type)
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84 options = [(path, 0) for path in paths]
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85 for option in options:
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86 opt_label = option[0]
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87 # append '=' to options which require args
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88 if option[1] and option[0][:2] == "--":
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89 opt_label += '='
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90 print(opt_label)
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91 else:
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92 # show main parser options only when necessary
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93
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94 opts = [i.option_list for i in parser.option_groups]
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95 opts.append(parser.option_list)
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96 flattened_opts = chain.from_iterable(opts)
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97 if current.startswith('-'):
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98 for opt in flattened_opts:
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99 if opt.help != optparse.SUPPRESS_HELP:
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100 subcommands += opt._long_opts + opt._short_opts
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101 else:
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102 # get completion type given cwords and all available options
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103 completion_type = get_path_completion_type(cwords, cword,
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104 flattened_opts)
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105 if completion_type:
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106 subcommands = list(auto_complete_paths(current,
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107 completion_type))
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108
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109 print(' '.join([x for x in subcommands if x.startswith(current)]))
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110 sys.exit(1)
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111
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112
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113 def get_path_completion_type(cwords, cword, opts):
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114 # type: (List[str], int, Iterable[Any]) -> Optional[str]
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115 """Get the type of path completion (``file``, ``dir``, ``path`` or None)
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116
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117 :param cwords: same as the environmental variable ``COMP_WORDS``
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118 :param cword: same as the environmental variable ``COMP_CWORD``
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119 :param opts: The available options to check
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120 :return: path completion type (``file``, ``dir``, ``path`` or None)
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121 """
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122 if cword < 2 or not cwords[cword - 2].startswith('-'):
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123 return None
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124 for opt in opts:
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125 if opt.help == optparse.SUPPRESS_HELP:
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126 continue
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127 for o in str(opt).split('/'):
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128 if cwords[cword - 2].split('=')[0] == o:
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129 if not opt.metavar or any(
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130 x in ('path', 'file', 'dir')
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131 for x in opt.metavar.split('/')):
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132 return opt.metavar
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133 return None
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134
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135
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136 def auto_complete_paths(current, completion_type):
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137 # type: (str, str) -> Iterable[str]
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138 """If ``completion_type`` is ``file`` or ``path``, list all regular files
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139 and directories starting with ``current``; otherwise only list directories
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140 starting with ``current``.
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141
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142 :param current: The word to be completed
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143 :param completion_type: path completion type(`file`, `path` or `dir`)i
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144 :return: A generator of regular files and/or directories
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145 """
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146 directory, filename = os.path.split(current)
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147 current_path = os.path.abspath(directory)
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148 # Don't complete paths if they can't be accessed
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149 if not os.access(current_path, os.R_OK):
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150 return
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151 filename = os.path.normcase(filename)
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152 # list all files that start with ``filename``
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153 file_list = (x for x in os.listdir(current_path)
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154 if os.path.normcase(x).startswith(filename))
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155 for f in file_list:
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156 opt = os.path.join(current_path, f)
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157 comp_file = os.path.normcase(os.path.join(directory, f))
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158 # complete regular files when there is not ``<dir>`` after option
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159 # complete directories when there is ``<file>``, ``<path>`` or
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160 # ``<dir>``after option
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161 if completion_type != 'dir' and os.path.isfile(opt):
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162 yield comp_file
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163 elif os.path.isdir(opt):
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164 yield os.path.join(comp_file, '')