Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/click/types.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 import os |
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2 import stat |
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3 from datetime import datetime |
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4 |
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5 from ._compat import _get_argv_encoding |
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6 from ._compat import filename_to_ui |
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7 from ._compat import get_filesystem_encoding |
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8 from ._compat import get_streerror |
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9 from ._compat import open_stream |
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10 from ._compat import PY2 |
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11 from ._compat import text_type |
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12 from .exceptions import BadParameter |
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13 from .utils import LazyFile |
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14 from .utils import safecall |
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15 |
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16 |
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17 class ParamType(object): |
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18 """Helper for converting values through types. The following is |
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19 necessary for a valid type: |
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20 |
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21 * it needs a name |
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22 * it needs to pass through None unchanged |
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23 * it needs to convert from a string |
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24 * it needs to convert its result type through unchanged |
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25 (eg: needs to be idempotent) |
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26 * it needs to be able to deal with param and context being `None`. |
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27 This can be the case when the object is used with prompt |
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28 inputs. |
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29 """ |
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30 |
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31 is_composite = False |
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32 |
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33 #: the descriptive name of this type |
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34 name = None |
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35 |
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36 #: if a list of this type is expected and the value is pulled from a |
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37 #: string environment variable, this is what splits it up. `None` |
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38 #: means any whitespace. For all parameters the general rule is that |
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39 #: whitespace splits them up. The exception are paths and files which |
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40 #: are split by ``os.path.pathsep`` by default (":" on Unix and ";" on |
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41 #: Windows). |
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42 envvar_list_splitter = None |
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43 |
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44 def __call__(self, value, param=None, ctx=None): |
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45 if value is not None: |
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46 return self.convert(value, param, ctx) |
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47 |
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48 def get_metavar(self, param): |
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49 """Returns the metavar default for this param if it provides one.""" |
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50 |
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51 def get_missing_message(self, param): |
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52 """Optionally might return extra information about a missing |
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53 parameter. |
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54 |
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55 .. versionadded:: 2.0 |
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56 """ |
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57 |
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58 def convert(self, value, param, ctx): |
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59 """Converts the value. This is not invoked for values that are |
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60 `None` (the missing value). |
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61 """ |
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62 return value |
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63 |
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64 def split_envvar_value(self, rv): |
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65 """Given a value from an environment variable this splits it up |
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66 into small chunks depending on the defined envvar list splitter. |
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67 |
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68 If the splitter is set to `None`, which means that whitespace splits, |
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69 then leading and trailing whitespace is ignored. Otherwise, leading |
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70 and trailing splitters usually lead to empty items being included. |
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71 """ |
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72 return (rv or "").split(self.envvar_list_splitter) |
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73 |
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74 def fail(self, message, param=None, ctx=None): |
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75 """Helper method to fail with an invalid value message.""" |
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76 raise BadParameter(message, ctx=ctx, param=param) |
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77 |
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78 |
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79 class CompositeParamType(ParamType): |
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80 is_composite = True |
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81 |
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82 @property |
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83 def arity(self): |
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84 raise NotImplementedError() |
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85 |
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86 |
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87 class FuncParamType(ParamType): |
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88 def __init__(self, func): |
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89 self.name = func.__name__ |
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90 self.func = func |
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91 |
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92 def convert(self, value, param, ctx): |
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93 try: |
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94 return self.func(value) |
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95 except ValueError: |
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96 try: |
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97 value = text_type(value) |
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98 except UnicodeError: |
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99 value = str(value).decode("utf-8", "replace") |
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100 self.fail(value, param, ctx) |
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101 |
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102 |
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103 class UnprocessedParamType(ParamType): |
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104 name = "text" |
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105 |
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106 def convert(self, value, param, ctx): |
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107 return value |
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108 |
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109 def __repr__(self): |
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110 return "UNPROCESSED" |
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111 |
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112 |
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113 class StringParamType(ParamType): |
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114 name = "text" |
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115 |
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116 def convert(self, value, param, ctx): |
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117 if isinstance(value, bytes): |
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118 enc = _get_argv_encoding() |
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119 try: |
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120 value = value.decode(enc) |
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121 except UnicodeError: |
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122 fs_enc = get_filesystem_encoding() |
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123 if fs_enc != enc: |
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124 try: |
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125 value = value.decode(fs_enc) |
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126 except UnicodeError: |
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127 value = value.decode("utf-8", "replace") |
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128 else: |
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129 value = value.decode("utf-8", "replace") |
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130 return value |
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131 return value |
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132 |
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133 def __repr__(self): |
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134 return "STRING" |
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135 |
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136 |
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137 class Choice(ParamType): |
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138 """The choice type allows a value to be checked against a fixed set |
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139 of supported values. All of these values have to be strings. |
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140 |
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141 You should only pass a list or tuple of choices. Other iterables |
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142 (like generators) may lead to surprising results. |
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143 |
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144 The resulting value will always be one of the originally passed choices |
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145 regardless of ``case_sensitive`` or any ``ctx.token_normalize_func`` |
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146 being specified. |
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147 |
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148 See :ref:`choice-opts` for an example. |
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149 |
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150 :param case_sensitive: Set to false to make choices case |
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151 insensitive. Defaults to true. |
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152 """ |
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153 |
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154 name = "choice" |
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155 |
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156 def __init__(self, choices, case_sensitive=True): |
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157 self.choices = choices |
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158 self.case_sensitive = case_sensitive |
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159 |
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160 def get_metavar(self, param): |
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161 return "[{}]".format("|".join(self.choices)) |
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162 |
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163 def get_missing_message(self, param): |
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164 return "Choose from:\n\t{}.".format(",\n\t".join(self.choices)) |
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165 |
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166 def convert(self, value, param, ctx): |
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167 # Match through normalization and case sensitivity |
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168 # first do token_normalize_func, then lowercase |
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169 # preserve original `value` to produce an accurate message in |
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170 # `self.fail` |
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171 normed_value = value |
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172 normed_choices = {choice: choice for choice in self.choices} |
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173 |
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174 if ctx is not None and ctx.token_normalize_func is not None: |
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175 normed_value = ctx.token_normalize_func(value) |
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176 normed_choices = { |
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177 ctx.token_normalize_func(normed_choice): original |
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178 for normed_choice, original in normed_choices.items() |
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179 } |
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180 |
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181 if not self.case_sensitive: |
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182 if PY2: |
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183 lower = str.lower |
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184 else: |
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185 lower = str.casefold |
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186 |
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187 normed_value = lower(normed_value) |
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188 normed_choices = { |
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189 lower(normed_choice): original |
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190 for normed_choice, original in normed_choices.items() |
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191 } |
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192 |
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193 if normed_value in normed_choices: |
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194 return normed_choices[normed_value] |
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195 |
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196 self.fail( |
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197 "invalid choice: {}. (choose from {})".format( |
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198 value, ", ".join(self.choices) |
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199 ), |
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200 param, |
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201 ctx, |
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202 ) |
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203 |
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204 def __repr__(self): |
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205 return "Choice('{}')".format(list(self.choices)) |
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206 |
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207 |
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208 class DateTime(ParamType): |
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209 """The DateTime type converts date strings into `datetime` objects. |
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210 |
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211 The format strings which are checked are configurable, but default to some |
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212 common (non-timezone aware) ISO 8601 formats. |
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213 |
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214 When specifying *DateTime* formats, you should only pass a list or a tuple. |
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215 Other iterables, like generators, may lead to surprising results. |
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216 |
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217 The format strings are processed using ``datetime.strptime``, and this |
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218 consequently defines the format strings which are allowed. |
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219 |
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220 Parsing is tried using each format, in order, and the first format which |
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221 parses successfully is used. |
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222 |
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223 :param formats: A list or tuple of date format strings, in the order in |
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224 which they should be tried. Defaults to |
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225 ``'%Y-%m-%d'``, ``'%Y-%m-%dT%H:%M:%S'``, |
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226 ``'%Y-%m-%d %H:%M:%S'``. |
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227 """ |
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228 |
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229 name = "datetime" |
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230 |
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231 def __init__(self, formats=None): |
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232 self.formats = formats or ["%Y-%m-%d", "%Y-%m-%dT%H:%M:%S", "%Y-%m-%d %H:%M:%S"] |
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233 |
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234 def get_metavar(self, param): |
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235 return "[{}]".format("|".join(self.formats)) |
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236 |
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237 def _try_to_convert_date(self, value, format): |
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238 try: |
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239 return datetime.strptime(value, format) |
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240 except ValueError: |
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241 return None |
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242 |
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243 def convert(self, value, param, ctx): |
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244 # Exact match |
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245 for format in self.formats: |
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246 dtime = self._try_to_convert_date(value, format) |
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247 if dtime: |
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248 return dtime |
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249 |
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250 self.fail( |
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251 "invalid datetime format: {}. (choose from {})".format( |
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252 value, ", ".join(self.formats) |
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253 ) |
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254 ) |
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255 |
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256 def __repr__(self): |
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257 return "DateTime" |
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258 |
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259 |
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260 class IntParamType(ParamType): |
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261 name = "integer" |
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262 |
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263 def convert(self, value, param, ctx): |
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264 try: |
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265 return int(value) |
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266 except ValueError: |
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267 self.fail("{} is not a valid integer".format(value), param, ctx) |
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268 |
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269 def __repr__(self): |
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270 return "INT" |
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271 |
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272 |
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273 class IntRange(IntParamType): |
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274 """A parameter that works similar to :data:`click.INT` but restricts |
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275 the value to fit into a range. The default behavior is to fail if the |
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276 value falls outside the range, but it can also be silently clamped |
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277 between the two edges. |
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278 |
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279 See :ref:`ranges` for an example. |
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280 """ |
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281 |
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282 name = "integer range" |
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283 |
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284 def __init__(self, min=None, max=None, clamp=False): |
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285 self.min = min |
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286 self.max = max |
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287 self.clamp = clamp |
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288 |
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289 def convert(self, value, param, ctx): |
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290 rv = IntParamType.convert(self, value, param, ctx) |
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291 if self.clamp: |
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292 if self.min is not None and rv < self.min: |
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293 return self.min |
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294 if self.max is not None and rv > self.max: |
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295 return self.max |
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296 if ( |
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297 self.min is not None |
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298 and rv < self.min |
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299 or self.max is not None |
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300 and rv > self.max |
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301 ): |
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302 if self.min is None: |
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303 self.fail( |
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304 "{} is bigger than the maximum valid value {}.".format( |
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305 rv, self.max |
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306 ), |
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307 param, |
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308 ctx, |
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309 ) |
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310 elif self.max is None: |
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311 self.fail( |
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312 "{} is smaller than the minimum valid value {}.".format( |
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313 rv, self.min |
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314 ), |
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315 param, |
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316 ctx, |
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317 ) |
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318 else: |
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319 self.fail( |
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320 "{} is not in the valid range of {} to {}.".format( |
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321 rv, self.min, self.max |
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322 ), |
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323 param, |
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324 ctx, |
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325 ) |
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326 return rv |
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327 |
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328 def __repr__(self): |
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329 return "IntRange({}, {})".format(self.min, self.max) |
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330 |
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331 |
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332 class FloatParamType(ParamType): |
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333 name = "float" |
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334 |
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335 def convert(self, value, param, ctx): |
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336 try: |
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337 return float(value) |
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338 except ValueError: |
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339 self.fail( |
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340 "{} is not a valid floating point value".format(value), param, ctx |
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341 ) |
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342 |
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343 def __repr__(self): |
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344 return "FLOAT" |
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345 |
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346 |
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347 class FloatRange(FloatParamType): |
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348 """A parameter that works similar to :data:`click.FLOAT` but restricts |
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349 the value to fit into a range. The default behavior is to fail if the |
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350 value falls outside the range, but it can also be silently clamped |
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351 between the two edges. |
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352 |
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353 See :ref:`ranges` for an example. |
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354 """ |
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355 |
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356 name = "float range" |
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357 |
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358 def __init__(self, min=None, max=None, clamp=False): |
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359 self.min = min |
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360 self.max = max |
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361 self.clamp = clamp |
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362 |
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363 def convert(self, value, param, ctx): |
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364 rv = FloatParamType.convert(self, value, param, ctx) |
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365 if self.clamp: |
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366 if self.min is not None and rv < self.min: |
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367 return self.min |
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368 if self.max is not None and rv > self.max: |
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369 return self.max |
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370 if ( |
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371 self.min is not None |
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372 and rv < self.min |
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373 or self.max is not None |
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374 and rv > self.max |
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375 ): |
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376 if self.min is None: |
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377 self.fail( |
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378 "{} is bigger than the maximum valid value {}.".format( |
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379 rv, self.max |
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380 ), |
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381 param, |
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382 ctx, |
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383 ) |
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384 elif self.max is None: |
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385 self.fail( |
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386 "{} is smaller than the minimum valid value {}.".format( |
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387 rv, self.min |
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388 ), |
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389 param, |
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390 ctx, |
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391 ) |
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392 else: |
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393 self.fail( |
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394 "{} is not in the valid range of {} to {}.".format( |
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395 rv, self.min, self.max |
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396 ), |
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397 param, |
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398 ctx, |
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399 ) |
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400 return rv |
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401 |
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402 def __repr__(self): |
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403 return "FloatRange({}, {})".format(self.min, self.max) |
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404 |
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405 |
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406 class BoolParamType(ParamType): |
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407 name = "boolean" |
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408 |
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409 def convert(self, value, param, ctx): |
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410 if isinstance(value, bool): |
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411 return bool(value) |
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412 value = value.lower() |
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413 if value in ("true", "t", "1", "yes", "y"): |
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414 return True |
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415 elif value in ("false", "f", "0", "no", "n"): |
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416 return False |
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417 self.fail("{} is not a valid boolean".format(value), param, ctx) |
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418 |
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419 def __repr__(self): |
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420 return "BOOL" |
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421 |
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422 |
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423 class UUIDParameterType(ParamType): |
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424 name = "uuid" |
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425 |
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426 def convert(self, value, param, ctx): |
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427 import uuid |
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428 |
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429 try: |
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430 if PY2 and isinstance(value, text_type): |
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431 value = value.encode("ascii") |
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432 return uuid.UUID(value) |
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433 except ValueError: |
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434 self.fail("{} is not a valid UUID value".format(value), param, ctx) |
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435 |
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436 def __repr__(self): |
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437 return "UUID" |
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438 |
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439 |
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440 class File(ParamType): |
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441 """Declares a parameter to be a file for reading or writing. The file |
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442 is automatically closed once the context tears down (after the command |
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443 finished working). |
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444 |
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445 Files can be opened for reading or writing. The special value ``-`` |
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446 indicates stdin or stdout depending on the mode. |
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447 |
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448 By default, the file is opened for reading text data, but it can also be |
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449 opened in binary mode or for writing. The encoding parameter can be used |
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450 to force a specific encoding. |
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451 |
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452 The `lazy` flag controls if the file should be opened immediately or upon |
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453 first IO. The default is to be non-lazy for standard input and output |
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454 streams as well as files opened for reading, `lazy` otherwise. When opening a |
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455 file lazily for reading, it is still opened temporarily for validation, but |
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456 will not be held open until first IO. lazy is mainly useful when opening |
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457 for writing to avoid creating the file until it is needed. |
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458 |
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459 Starting with Click 2.0, files can also be opened atomically in which |
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460 case all writes go into a separate file in the same folder and upon |
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461 completion the file will be moved over to the original location. This |
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462 is useful if a file regularly read by other users is modified. |
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463 |
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464 See :ref:`file-args` for more information. |
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465 """ |
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466 |
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467 name = "filename" |
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468 envvar_list_splitter = os.path.pathsep |
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469 |
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470 def __init__( |
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471 self, mode="r", encoding=None, errors="strict", lazy=None, atomic=False |
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472 ): |
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473 self.mode = mode |
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474 self.encoding = encoding |
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475 self.errors = errors |
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476 self.lazy = lazy |
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477 self.atomic = atomic |
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478 |
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479 def resolve_lazy_flag(self, value): |
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480 if self.lazy is not None: |
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481 return self.lazy |
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482 if value == "-": |
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483 return False |
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484 elif "w" in self.mode: |
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485 return True |
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486 return False |
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487 |
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488 def convert(self, value, param, ctx): |
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489 try: |
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490 if hasattr(value, "read") or hasattr(value, "write"): |
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491 return value |
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492 |
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493 lazy = self.resolve_lazy_flag(value) |
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494 |
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495 if lazy: |
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496 f = LazyFile( |
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497 value, self.mode, self.encoding, self.errors, atomic=self.atomic |
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498 ) |
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499 if ctx is not None: |
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500 ctx.call_on_close(f.close_intelligently) |
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501 return f |
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502 |
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503 f, should_close = open_stream( |
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504 value, self.mode, self.encoding, self.errors, atomic=self.atomic |
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505 ) |
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506 # If a context is provided, we automatically close the file |
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507 # at the end of the context execution (or flush out). If a |
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508 # context does not exist, it's the caller's responsibility to |
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509 # properly close the file. This for instance happens when the |
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510 # type is used with prompts. |
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511 if ctx is not None: |
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512 if should_close: |
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513 ctx.call_on_close(safecall(f.close)) |
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514 else: |
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515 ctx.call_on_close(safecall(f.flush)) |
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516 return f |
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517 except (IOError, OSError) as e: # noqa: B014 |
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518 self.fail( |
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519 "Could not open file: {}: {}".format( |
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520 filename_to_ui(value), get_streerror(e) |
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521 ), |
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522 param, |
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523 ctx, |
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524 ) |
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525 |
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526 |
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527 class Path(ParamType): |
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528 """The path type is similar to the :class:`File` type but it performs |
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529 different checks. First of all, instead of returning an open file |
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530 handle it returns just the filename. Secondly, it can perform various |
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531 basic checks about what the file or directory should be. |
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532 |
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533 .. versionchanged:: 6.0 |
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534 `allow_dash` was added. |
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535 |
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536 :param exists: if set to true, the file or directory needs to exist for |
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537 this value to be valid. If this is not required and a |
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538 file does indeed not exist, then all further checks are |
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539 silently skipped. |
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540 :param file_okay: controls if a file is a possible value. |
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541 :param dir_okay: controls if a directory is a possible value. |
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542 :param writable: if true, a writable check is performed. |
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543 :param readable: if true, a readable check is performed. |
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544 :param resolve_path: if this is true, then the path is fully resolved |
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545 before the value is passed onwards. This means |
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546 that it's absolute and symlinks are resolved. It |
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547 will not expand a tilde-prefix, as this is |
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548 supposed to be done by the shell only. |
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549 :param allow_dash: If this is set to `True`, a single dash to indicate |
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550 standard streams is permitted. |
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551 :param path_type: optionally a string type that should be used to |
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552 represent the path. The default is `None` which |
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553 means the return value will be either bytes or |
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554 unicode depending on what makes most sense given the |
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555 input data Click deals with. |
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556 """ |
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557 |
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558 envvar_list_splitter = os.path.pathsep |
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559 |
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560 def __init__( |
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561 self, |
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562 exists=False, |
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563 file_okay=True, |
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564 dir_okay=True, |
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565 writable=False, |
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566 readable=True, |
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567 resolve_path=False, |
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568 allow_dash=False, |
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569 path_type=None, |
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570 ): |
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571 self.exists = exists |
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572 self.file_okay = file_okay |
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573 self.dir_okay = dir_okay |
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574 self.writable = writable |
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575 self.readable = readable |
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576 self.resolve_path = resolve_path |
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577 self.allow_dash = allow_dash |
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578 self.type = path_type |
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579 |
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580 if self.file_okay and not self.dir_okay: |
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581 self.name = "file" |
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582 self.path_type = "File" |
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583 elif self.dir_okay and not self.file_okay: |
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584 self.name = "directory" |
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585 self.path_type = "Directory" |
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586 else: |
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587 self.name = "path" |
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588 self.path_type = "Path" |
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589 |
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590 def coerce_path_result(self, rv): |
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591 if self.type is not None and not isinstance(rv, self.type): |
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592 if self.type is text_type: |
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593 rv = rv.decode(get_filesystem_encoding()) |
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594 else: |
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595 rv = rv.encode(get_filesystem_encoding()) |
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596 return rv |
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597 |
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598 def convert(self, value, param, ctx): |
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599 rv = value |
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600 |
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601 is_dash = self.file_okay and self.allow_dash and rv in (b"-", "-") |
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602 |
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603 if not is_dash: |
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604 if self.resolve_path: |
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605 rv = os.path.realpath(rv) |
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606 |
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607 try: |
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608 st = os.stat(rv) |
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609 except OSError: |
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610 if not self.exists: |
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611 return self.coerce_path_result(rv) |
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612 self.fail( |
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613 "{} '{}' does not exist.".format( |
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614 self.path_type, filename_to_ui(value) |
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615 ), |
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616 param, |
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617 ctx, |
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618 ) |
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619 |
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620 if not self.file_okay and stat.S_ISREG(st.st_mode): |
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621 self.fail( |
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622 "{} '{}' is a file.".format(self.path_type, filename_to_ui(value)), |
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623 param, |
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624 ctx, |
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625 ) |
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626 if not self.dir_okay and stat.S_ISDIR(st.st_mode): |
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627 self.fail( |
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628 "{} '{}' is a directory.".format( |
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629 self.path_type, filename_to_ui(value) |
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630 ), |
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631 param, |
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632 ctx, |
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633 ) |
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634 if self.writable and not os.access(value, os.W_OK): |
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635 self.fail( |
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636 "{} '{}' is not writable.".format( |
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637 self.path_type, filename_to_ui(value) |
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638 ), |
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639 param, |
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640 ctx, |
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641 ) |
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642 if self.readable and not os.access(value, os.R_OK): |
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643 self.fail( |
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644 "{} '{}' is not readable.".format( |
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645 self.path_type, filename_to_ui(value) |
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646 ), |
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647 param, |
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648 ctx, |
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649 ) |
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650 |
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651 return self.coerce_path_result(rv) |
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652 |
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653 |
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654 class Tuple(CompositeParamType): |
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655 """The default behavior of Click is to apply a type on a value directly. |
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656 This works well in most cases, except for when `nargs` is set to a fixed |
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657 count and different types should be used for different items. In this |
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658 case the :class:`Tuple` type can be used. This type can only be used |
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659 if `nargs` is set to a fixed number. |
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660 |
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661 For more information see :ref:`tuple-type`. |
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662 |
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663 This can be selected by using a Python tuple literal as a type. |
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664 |
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665 :param types: a list of types that should be used for the tuple items. |
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666 """ |
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667 |
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668 def __init__(self, types): |
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669 self.types = [convert_type(ty) for ty in types] |
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670 |
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671 @property |
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672 def name(self): |
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673 return "<{}>".format(" ".join(ty.name for ty in self.types)) |
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674 |
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675 @property |
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676 def arity(self): |
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677 return len(self.types) |
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678 |
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679 def convert(self, value, param, ctx): |
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680 if len(value) != len(self.types): |
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681 raise TypeError( |
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682 "It would appear that nargs is set to conflict with the" |
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683 " composite type arity." |
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684 ) |
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685 return tuple(ty(x, param, ctx) for ty, x in zip(self.types, value)) |
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686 |
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687 |
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688 def convert_type(ty, default=None): |
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689 """Converts a callable or python type into the most appropriate |
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690 param type. |
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691 """ |
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692 guessed_type = False |
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693 if ty is None and default is not None: |
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694 if isinstance(default, tuple): |
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695 ty = tuple(map(type, default)) |
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696 else: |
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697 ty = type(default) |
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698 guessed_type = True |
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699 |
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700 if isinstance(ty, tuple): |
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701 return Tuple(ty) |
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702 if isinstance(ty, ParamType): |
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703 return ty |
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704 if ty is text_type or ty is str or ty is None: |
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705 return STRING |
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706 if ty is int: |
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707 return INT |
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708 # Booleans are only okay if not guessed. This is done because for |
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709 # flags the default value is actually a bit of a lie in that it |
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710 # indicates which of the flags is the one we want. See get_default() |
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711 # for more information. |
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712 if ty is bool and not guessed_type: |
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713 return BOOL |
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714 if ty is float: |
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715 return FLOAT |
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716 if guessed_type: |
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717 return STRING |
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718 |
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719 # Catch a common mistake |
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720 if __debug__: |
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721 try: |
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722 if issubclass(ty, ParamType): |
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723 raise AssertionError( |
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724 "Attempted to use an uninstantiated parameter type ({}).".format(ty) |
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725 ) |
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726 except TypeError: |
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727 pass |
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728 return FuncParamType(ty) |
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729 |
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730 |
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731 #: A dummy parameter type that just does nothing. From a user's |
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732 #: perspective this appears to just be the same as `STRING` but internally |
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733 #: no string conversion takes place. This is necessary to achieve the |
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734 #: same bytes/unicode behavior on Python 2/3 in situations where you want |
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735 #: to not convert argument types. This is usually useful when working |
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736 #: with file paths as they can appear in bytes and unicode. |
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737 #: |
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738 #: For path related uses the :class:`Path` type is a better choice but |
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739 #: there are situations where an unprocessed type is useful which is why |
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740 #: it is is provided. |
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741 #: |
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742 #: .. versionadded:: 4.0 |
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743 UNPROCESSED = UnprocessedParamType() |
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744 |
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745 #: A unicode string parameter type which is the implicit default. This |
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746 #: can also be selected by using ``str`` as type. |
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747 STRING = StringParamType() |
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748 |
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749 #: An integer parameter. This can also be selected by using ``int`` as |
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750 #: type. |
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751 INT = IntParamType() |
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752 |
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753 #: A floating point value parameter. This can also be selected by using |
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754 #: ``float`` as type. |
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755 FLOAT = FloatParamType() |
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756 |
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757 #: A boolean parameter. This is the default for boolean flags. This can |
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758 #: also be selected by using ``bool`` as a type. |
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759 BOOL = BoolParamType() |
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760 |
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761 #: A UUID parameter. |
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762 UUID = UUIDParameterType() |