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annotate lib/python3.8/site-packages/pip/_internal/commands/configuration.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 # The following comment should be removed at some point in the future.
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2 # mypy: disallow-untyped-defs=False
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3
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4 import logging
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5 import os
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6 import subprocess
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7
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8 from pip._internal.cli.base_command import Command
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9 from pip._internal.cli.status_codes import ERROR, SUCCESS
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10 from pip._internal.configuration import (
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11 Configuration,
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12 get_configuration_files,
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13 kinds,
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14 )
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15 from pip._internal.exceptions import PipError
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16 from pip._internal.utils.misc import get_prog, write_output
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17
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18 logger = logging.getLogger(__name__)
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19
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20
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21 class ConfigurationCommand(Command):
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22 """Manage local and global configuration.
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23
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24 Subcommands:
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25
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26 list: List the active configuration (or from the file specified)
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27 edit: Edit the configuration file in an editor
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28 get: Get the value associated with name
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29 set: Set the name=value
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30 unset: Unset the value associated with name
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31
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32 If none of --user, --global and --site are passed, a virtual
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33 environment configuration file is used if one is active and the file
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34 exists. Otherwise, all modifications happen on the to the user file by
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35 default.
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36 """
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37
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38 ignore_require_venv = True
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39 usage = """
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40 %prog [<file-option>] list
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41 %prog [<file-option>] [--editor <editor-path>] edit
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42
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43 %prog [<file-option>] get name
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44 %prog [<file-option>] set name value
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45 %prog [<file-option>] unset name
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46 """
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47
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48 def __init__(self, *args, **kwargs):
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49 super(ConfigurationCommand, self).__init__(*args, **kwargs)
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50
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51 self.configuration = None
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52
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53 self.cmd_opts.add_option(
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54 '--editor',
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55 dest='editor',
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56 action='store',
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57 default=None,
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58 help=(
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59 'Editor to use to edit the file. Uses VISUAL or EDITOR '
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60 'environment variables if not provided.'
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61 )
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62 )
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63
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64 self.cmd_opts.add_option(
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65 '--global',
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66 dest='global_file',
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67 action='store_true',
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68 default=False,
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69 help='Use the system-wide configuration file only'
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70 )
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71
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72 self.cmd_opts.add_option(
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73 '--user',
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74 dest='user_file',
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75 action='store_true',
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76 default=False,
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77 help='Use the user configuration file only'
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78 )
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79
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80 self.cmd_opts.add_option(
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81 '--site',
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82 dest='site_file',
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83 action='store_true',
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84 default=False,
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85 help='Use the current environment configuration file only'
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86 )
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87
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88 self.parser.insert_option_group(0, self.cmd_opts)
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89
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90 def run(self, options, args):
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91 handlers = {
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92 "list": self.list_values,
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93 "edit": self.open_in_editor,
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94 "get": self.get_name,
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95 "set": self.set_name_value,
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96 "unset": self.unset_name
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97 }
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98
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99 # Determine action
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100 if not args or args[0] not in handlers:
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101 logger.error("Need an action ({}) to perform.".format(
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102 ", ".join(sorted(handlers)))
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103 )
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104 return ERROR
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105
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106 action = args[0]
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107
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108 # Determine which configuration files are to be loaded
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109 # Depends on whether the command is modifying.
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110 try:
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111 load_only = self._determine_file(
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112 options, need_value=(action in ["get", "set", "unset", "edit"])
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113 )
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114 except PipError as e:
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115 logger.error(e.args[0])
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116 return ERROR
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117
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118 # Load a new configuration
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119 self.configuration = Configuration(
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120 isolated=options.isolated_mode, load_only=load_only
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121 )
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122 self.configuration.load()
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123
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124 # Error handling happens here, not in the action-handlers.
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125 try:
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126 handlers[action](options, args[1:])
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127 except PipError as e:
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128 logger.error(e.args[0])
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129 return ERROR
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130
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131 return SUCCESS
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132
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133 def _determine_file(self, options, need_value):
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134 file_options = [key for key, value in (
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135 (kinds.USER, options.user_file),
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136 (kinds.GLOBAL, options.global_file),
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137 (kinds.SITE, options.site_file),
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138 ) if value]
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139
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140 if not file_options:
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141 if not need_value:
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142 return None
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143 # Default to user, unless there's a site file.
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144 elif any(
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145 os.path.exists(site_config_file)
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146 for site_config_file in get_configuration_files()[kinds.SITE]
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147 ):
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148 return kinds.SITE
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149 else:
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150 return kinds.USER
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151 elif len(file_options) == 1:
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152 return file_options[0]
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153
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154 raise PipError(
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155 "Need exactly one file to operate upon "
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156 "(--user, --site, --global) to perform."
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157 )
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158
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159 def list_values(self, options, args):
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160 self._get_n_args(args, "list", n=0)
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161
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162 for key, value in sorted(self.configuration.items()):
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163 write_output("%s=%r", key, value)
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164
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165 def get_name(self, options, args):
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166 key = self._get_n_args(args, "get [name]", n=1)
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167 value = self.configuration.get_value(key)
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168
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169 write_output("%s", value)
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170
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171 def set_name_value(self, options, args):
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172 key, value = self._get_n_args(args, "set [name] [value]", n=2)
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173 self.configuration.set_value(key, value)
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174
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175 self._save_configuration()
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176
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177 def unset_name(self, options, args):
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178 key = self._get_n_args(args, "unset [name]", n=1)
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179 self.configuration.unset_value(key)
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180
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181 self._save_configuration()
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182
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183 def open_in_editor(self, options, args):
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184 editor = self._determine_editor(options)
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185
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186 fname = self.configuration.get_file_to_edit()
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187 if fname is None:
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188 raise PipError("Could not determine appropriate file.")
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189
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190 try:
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191 subprocess.check_call([editor, fname])
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192 except subprocess.CalledProcessError as e:
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193 raise PipError(
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194 "Editor Subprocess exited with exit code {}"
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195 .format(e.returncode)
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196 )
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197
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198 def _get_n_args(self, args, example, n):
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199 """Helper to make sure the command got the right number of arguments
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200 """
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201 if len(args) != n:
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202 msg = (
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
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203 'Got unexpected number of arguments, expected {}. '
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204 '(example: "{} config {}")'
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205 ).format(n, get_prog(), example)
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206 raise PipError(msg)
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207
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208 if n == 1:
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209 return args[0]
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210 else:
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211 return args
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212
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213 def _save_configuration(self):
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214 # We successfully ran a modifying command. Need to save the
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215 # configuration.
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216 try:
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217 self.configuration.save()
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218 except Exception:
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219 logger.error(
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
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220 "Unable to save configuration. Please report this as a bug.",
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221 exc_info=1
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222 )
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
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223 raise PipError("Internal Error.")
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224
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225 def _determine_editor(self, options):
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
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226 if options.editor is not None:
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227 return options.editor
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
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228 elif "VISUAL" in os.environ:
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229 return os.environ["VISUAL"]
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230 elif "EDITOR" in os.environ:
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231 return os.environ["EDITOR"]
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232 else:
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
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233 raise PipError("Could not determine editor to use.")