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annotate venv/lib/python2.7/site-packages/click/exceptions.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 from ._compat import PY2, filename_to_ui, get_text_stderr
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2 from .utils import echo
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3
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4
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5 class ClickException(Exception):
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6 """An exception that Click can handle and show to the user."""
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7
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8 #: The exit code for this exception
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9 exit_code = 1
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10
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11 def __init__(self, message):
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12 if PY2:
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13 if message is not None:
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14 message = message.encode('utf-8')
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15 Exception.__init__(self, message)
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16 self.message = message
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17
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18 def format_message(self):
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19 return self.message
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20
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21 def show(self, file=None):
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22 if file is None:
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23 file = get_text_stderr()
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24 echo('Error: %s' % self.format_message(), file=file)
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25
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26
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27 class UsageError(ClickException):
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28 """An internal exception that signals a usage error. This typically
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29 aborts any further handling.
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30
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31 :param message: the error message to display.
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32 :param ctx: optionally the context that caused this error. Click will
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33 fill in the context automatically in some situations.
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34 """
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35 exit_code = 2
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36
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37 def __init__(self, message, ctx=None):
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38 ClickException.__init__(self, message)
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39 self.ctx = ctx
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40
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41 def show(self, file=None):
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42 if file is None:
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43 file = get_text_stderr()
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44 color = None
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45 if self.ctx is not None:
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46 color = self.ctx.color
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47 echo(self.ctx.get_usage() + '\n', file=file, color=color)
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48 echo('Error: %s' % self.format_message(), file=file, color=color)
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49
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50
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51 class BadParameter(UsageError):
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52 """An exception that formats out a standardized error message for a
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53 bad parameter. This is useful when thrown from a callback or type as
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54 Click will attach contextual information to it (for instance, which
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55 parameter it is).
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56
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57 .. versionadded:: 2.0
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58
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59 :param param: the parameter object that caused this error. This can
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60 be left out, and Click will attach this info itself
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61 if possible.
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62 :param param_hint: a string that shows up as parameter name. This
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63 can be used as alternative to `param` in cases
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64 where custom validation should happen. If it is
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65 a string it's used as such, if it's a list then
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66 each item is quoted and separated.
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67 """
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68
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69 def __init__(self, message, ctx=None, param=None,
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70 param_hint=None):
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71 UsageError.__init__(self, message, ctx)
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72 self.param = param
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73 self.param_hint = param_hint
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74
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75 def format_message(self):
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76 if self.param_hint is not None:
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77 param_hint = self.param_hint
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78 elif self.param is not None:
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79 param_hint = self.param.opts or [self.param.human_readable_name]
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80 else:
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81 return 'Invalid value: %s' % self.message
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82 if isinstance(param_hint, (tuple, list)):
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83 param_hint = ' / '.join('"%s"' % x for x in param_hint)
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84 return 'Invalid value for %s: %s' % (param_hint, self.message)
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85
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86
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87 class MissingParameter(BadParameter):
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88 """Raised if click required an option or argument but it was not
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89 provided when invoking the script.
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90
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91 .. versionadded:: 4.0
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92
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93 :param param_type: a string that indicates the type of the parameter.
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94 The default is to inherit the parameter type from
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95 the given `param`. Valid values are ``'parameter'``,
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96 ``'option'`` or ``'argument'``.
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97 """
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98
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99 def __init__(self, message=None, ctx=None, param=None,
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100 param_hint=None, param_type=None):
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101 BadParameter.__init__(self, message, ctx, param, param_hint)
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102 self.param_type = param_type
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103
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104 def format_message(self):
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105 if self.param_hint is not None:
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106 param_hint = self.param_hint
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107 elif self.param is not None:
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108 param_hint = self.param.opts or [self.param.human_readable_name]
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109 else:
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110 param_hint = None
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111 if isinstance(param_hint, (tuple, list)):
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112 param_hint = ' / '.join('"%s"' % x for x in param_hint)
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113
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114 param_type = self.param_type
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115 if param_type is None and self.param is not None:
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116 param_type = self.param.param_type_name
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117
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118 msg = self.message
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119 msg_extra = self.param.type.get_missing_message(self.param)
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120 if msg_extra:
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121 if msg:
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122 msg += '. ' + msg_extra
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123 else:
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124 msg = msg_extra
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125
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126 return 'Missing %s%s%s%s' % (
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127 param_type,
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128 param_hint and ' %s' % param_hint or '',
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129 msg and '. ' or '.',
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130 msg or '',
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131 )
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132
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133
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134 class NoSuchOption(UsageError):
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135 """Raised if click attempted to handle an option that does not
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136 exist.
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137
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138 .. versionadded:: 4.0
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139 """
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140
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141 def __init__(self, option_name, message=None, possibilities=None,
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142 ctx=None):
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143 if message is None:
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144 message = 'no such option: %s' % option_name
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145 UsageError.__init__(self, message, ctx)
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146 self.option_name = option_name
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147 self.possibilities = possibilities
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148
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149 def format_message(self):
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150 bits = [self.message]
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151 if self.possibilities:
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152 if len(self.possibilities) == 1:
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153 bits.append('Did you mean %s?' % self.possibilities[0])
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154 else:
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155 possibilities = sorted(self.possibilities)
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156 bits.append('(Possible options: %s)' % ', '.join(possibilities))
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157 return ' '.join(bits)
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158
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159
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160 class BadOptionUsage(UsageError):
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161 """Raised if an option is generally supplied but the use of the option
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162 was incorrect. This is for instance raised if the number of arguments
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163 for an option is not correct.
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164
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165 .. versionadded:: 4.0
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166 """
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167
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168 def __init__(self, option_name, message, ctx=None):
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169 UsageError.__init__(self, message, ctx)
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170
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171
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172 class FileError(ClickException):
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173 """Raised if a file cannot be opened."""
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174
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175 def __init__(self, filename, hint=None):
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176 ui_filename = filename_to_ui(filename)
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177 if hint is None:
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178 hint = 'unknown error'
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179 ClickException.__init__(self, hint)
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180 self.ui_filename = ui_filename
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181 self.filename = filename
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182
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183 def format_message(self):
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184 return 'Could not open file %s: %s' % (self.ui_filename, self.message)
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185
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186
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187 class Abort(RuntimeError):
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188 """An internal signalling exception that signals Click to abort."""