Mercurial > hg
annotate mercurial/error.py @ 46379:ee9002b99595
engine: add `if True` to prepare for next patch
This will help making next patch easier to read.
Differential Revision: https://phab.mercurial-scm.org/D9774
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Thu, 14 Jan 2021 16:34:58 +0530 |
parents | 89a2afe31e82 |
children | 3941fe53670d ae62ab82a345 |
rev | line source |
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1 # error.py - Mercurial exceptions |
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2 # |
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3 # Copyright 2005-2008 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
7633 | 7 |
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8 """Mercurial exceptions. |
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9 |
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10 This allows us to catch exceptions at higher levels without forcing |
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11 imports. |
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12 """ |
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13 |
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14 from __future__ import absolute_import |
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15 |
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16 import difflib |
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17 |
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18 # Do not import anything but pycompat here, please |
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19 from . import pycompat |
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20 |
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21 |
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22 def _tobytes(exc): |
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23 """Byte-stringify exception in the same way as BaseException_str()""" |
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24 if not exc.args: |
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25 return b'' |
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26 if len(exc.args) == 1: |
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27 return pycompat.bytestr(exc.args[0]) |
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28 return b'(%s)' % b', '.join(b"'%s'" % pycompat.bytestr(a) for a in exc.args) |
7633 | 29 |
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30 |
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31 class Hint(object): |
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32 """Mix-in to provide a hint of an error |
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33 |
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34 This should come first in the inheritance list to consume a hint and |
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35 pass remaining arguments to the exception class. |
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36 """ |
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37 |
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38 def __init__(self, *args, **kw): |
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39 self.hint = kw.pop('hint', None) |
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40 super(Hint, self).__init__(*args, **kw) |
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41 |
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42 |
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43 class StorageError(Hint, Exception): |
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44 """Raised when an error occurs in a storage layer. |
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45 |
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46 Usually subclassed by a storage-specific exception. |
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47 """ |
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48 |
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49 __bytes__ = _tobytes |
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50 |
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51 |
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52 class RevlogError(StorageError): |
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53 pass |
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55 |
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56 class SidedataHashError(RevlogError): |
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57 def __init__(self, key, expected, got): |
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58 self.sidedatakey = key |
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59 self.expecteddigest = expected |
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60 self.actualdigest = got |
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61 |
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62 |
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63 class FilteredIndexError(IndexError): |
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64 __bytes__ = _tobytes |
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65 |
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66 |
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68 def __init__(self, name, index, message): | |
69 self.name = name | |
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70 self.index = index |
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71 # this can't be called 'message' because at least some installs of |
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72 # Python 2.6+ complain about the 'message' property being deprecated |
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73 self.lookupmessage = message |
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74 if isinstance(name, bytes) and len(name) == 20: |
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75 from .node import short |
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76 |
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78 # if name is a binary node, it can be None |
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79 RevlogError.__init__( |
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80 self, b'%s@%s: %s' % (index, pycompat.bytestr(name), message) |
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81 ) |
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83 def __bytes__(self): |
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84 return RevlogError.__bytes__(self) |
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85 |
7633 | 86 def __str__(self): |
87 return RevlogError.__str__(self) | |
7636 | 88 |
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89 |
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90 class AmbiguousPrefixLookupError(LookupError): |
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91 pass |
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92 |
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93 |
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94 class FilteredLookupError(LookupError): |
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95 pass |
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96 |
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97 |
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98 class ManifestLookupError(LookupError): |
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99 pass |
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100 |
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101 |
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102 class CommandError(Exception): |
7636 | 103 """Exception raised on errors in parsing the command line.""" |
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104 |
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105 def __init__(self, command, message): |
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106 self.command = command |
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107 self.message = message |
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108 super(CommandError, self).__init__() |
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109 |
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110 __bytes__ = _tobytes |
7637 | 111 |
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112 |
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113 class UnknownCommand(Exception): |
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114 """Exception raised if command is not in the command table.""" |
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115 |
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116 def __init__(self, command, all_commands=None): |
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117 self.command = command |
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118 self.all_commands = all_commands |
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119 super(UnknownCommand, self).__init__() |
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120 |
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121 __bytes__ = _tobytes |
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122 |
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123 |
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124 class AmbiguousCommand(Exception): |
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125 """Exception raised if command shortcut matches more than one command.""" |
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126 |
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127 def __init__(self, prefix, matches): |
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128 self.prefix = prefix |
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129 self.matches = matches |
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130 super(AmbiguousCommand, self).__init__() |
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131 |
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132 __bytes__ = _tobytes |
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133 |
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134 |
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135 class WorkerError(Exception): |
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136 """Exception raised when a worker process dies.""" |
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137 |
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138 def __init__(self, status_code): |
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139 self.status_code = status_code |
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140 # Pass status code to superclass just so it becomes part of __bytes__ |
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141 super(WorkerError, self).__init__(status_code) |
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142 |
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143 __bytes__ = _tobytes |
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144 |
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145 |
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146 class InterventionRequired(Hint, Exception): |
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147 """Exception raised when a command requires human intervention.""" |
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148 |
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149 __bytes__ = _tobytes |
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150 |
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151 |
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152 class ConflictResolutionRequired(InterventionRequired): |
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153 """Exception raised when a continuable command required merge conflict resolution.""" |
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154 |
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155 def __init__(self, opname): |
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156 from .i18n import _ |
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157 |
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158 self.opname = opname |
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159 InterventionRequired.__init__( |
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160 self, |
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161 _( |
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162 b"unresolved conflicts (see 'hg resolve', then 'hg %s --continue')" |
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163 ) |
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164 % opname, |
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165 ) |
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166 |
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167 |
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168 class Abort(Hint, Exception): |
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169 """Raised if a command needs to print an error and exit.""" |
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170 |
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171 def __init__(self, message, hint=None): |
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172 self.message = message |
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173 self.hint = hint |
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174 # Pass the message into the Exception constructor to help extensions |
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175 # that look for exc.args[0]. |
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176 Exception.__init__(self, message) |
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177 |
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178 def __bytes__(self): |
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179 return self.message |
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180 |
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181 if pycompat.ispy3: |
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182 |
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183 def __str__(self): |
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184 # the output would be unreadable if the message was translated, |
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185 # but do not replace it with encoding.strfromlocal(), which |
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186 # may raise another exception. |
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187 return pycompat.sysstr(self.__bytes__()) |
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188 |
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189 def format(self): |
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190 from .i18n import _ |
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191 |
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192 message = _(b"abort: %s\n") % self.message |
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193 if self.hint: |
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194 message += _(b"(%s)\n") % self.hint |
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195 return message |
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196 |
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197 |
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198 class InputError(Abort): |
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199 """Indicates that the user made an error in their input. |
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200 |
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201 Examples: Invalid command, invalid flags, invalid revision. |
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202 """ |
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203 |
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204 |
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205 class StateError(Abort): |
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206 """Indicates that the operation might work if retried in a different state. |
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207 |
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208 Examples: Unresolved merge conflicts, unfinished operations. |
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209 """ |
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210 |
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211 |
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212 class CanceledError(Abort): |
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213 """Indicates that the user canceled the operation. |
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214 |
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215 Examples: Close commit editor with error status, quit chistedit. |
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216 """ |
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217 |
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218 |
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219 class SecurityError(Abort): |
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220 """Indicates that some aspect of security failed. |
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221 |
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222 Examples: Bad server credentials, expired local credentials for network |
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223 filesystem, mismatched GPG signature, DoS protection. |
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224 """ |
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225 |
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226 |
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227 class HookLoadError(Abort): |
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228 """raised when loading a hook fails, aborting an operation |
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229 |
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230 Exists to allow more specialized catching.""" |
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231 |
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232 |
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233 class HookAbort(Abort): |
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234 """raised when a validation hook fails, aborting an operation |
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235 |
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236 Exists to allow more specialized catching.""" |
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237 |
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238 |
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239 class ConfigError(Abort): |
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240 """Exception raised when parsing config files""" |
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241 |
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242 def __init__(self, message, location=None, hint=None): |
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243 super(ConfigError, self).__init__(message, hint=hint) |
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244 self.location = location |
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245 |
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246 def format(self): |
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247 from .i18n import _ |
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248 |
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249 if self.location is not None: |
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250 message = _(b"config error at %s: %s\n") % ( |
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251 pycompat.bytestr(self.location), |
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252 self.message, |
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253 ) |
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254 else: |
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255 message = _(b"config error: %s\n") % self.message |
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256 if self.hint: |
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257 message += _(b"(%s)\n") % self.hint |
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258 return message |
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259 |
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260 |
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261 class UpdateAbort(Abort): |
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262 """Raised when an update is aborted for destination issue""" |
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263 |
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264 |
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265 class MergeDestAbort(Abort): |
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266 """Raised when an update is aborted for destination issues""" |
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267 |
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268 |
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269 class NoMergeDestAbort(MergeDestAbort): |
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270 """Raised when an update is aborted because there is nothing to merge""" |
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271 |
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272 |
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273 class ManyMergeDestAbort(MergeDestAbort): |
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274 """Raised when an update is aborted because destination is ambiguous""" |
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275 |
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276 |
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277 class ResponseExpected(Abort): |
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278 """Raised when an EOF is received for a prompt""" |
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279 |
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280 def __init__(self): |
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281 from .i18n import _ |
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282 |
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283 Abort.__init__(self, _(b'response expected')) |
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284 |
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285 |
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286 class OutOfBandError(Hint, Exception): |
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287 """Exception raised when a remote repo reports failure""" |
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288 |
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289 __bytes__ = _tobytes |
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290 |
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291 |
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292 class ParseError(Abort): |
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293 """Raised when parsing config files and {rev,file}sets (msg[, pos])""" |
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294 |
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295 def __init__(self, message, location=None, hint=None): |
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296 super(ParseError, self).__init__(message, hint=hint) |
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297 self.location = location |
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298 |
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299 def format(self): |
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300 from .i18n import _ |
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301 |
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302 if self.location is not None: |
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303 message = _(b"hg: parse error at %s: %s\n") % ( |
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304 pycompat.bytestr(self.location), |
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305 self.message, |
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306 ) |
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307 else: |
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308 message = _(b"hg: parse error: %s\n") % self.message |
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309 if self.hint: |
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310 message += _(b"(%s)\n") % self.hint |
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311 return message |
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312 |
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313 |
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314 class PatchError(Exception): |
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315 __bytes__ = _tobytes |
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316 |
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317 |
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318 def getsimilar(symbols, value): |
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319 sim = lambda x: difflib.SequenceMatcher(None, value, x).ratio() |
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320 # The cutoff for similarity here is pretty arbitrary. It should |
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321 # probably be investigated and tweaked. |
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322 return [s for s in symbols if sim(s) > 0.6] |
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323 |
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324 |
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325 def similarity_hint(similar): |
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326 from .i18n import _ |
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327 |
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328 if len(similar) == 1: |
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329 return _(b"did you mean %s?") % similar[0] |
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330 elif similar: |
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331 ss = b", ".join(sorted(similar)) |
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332 return _(b"did you mean one of %s?") % ss |
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333 else: |
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334 return None |
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335 |
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336 |
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337 class UnknownIdentifier(ParseError): |
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338 """Exception raised when a {rev,file}set references an unknown identifier""" |
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339 |
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340 def __init__(self, function, symbols): |
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341 from .i18n import _ |
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342 |
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343 similar = getsimilar(symbols, function) |
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344 hint = similarity_hint(similar) |
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345 |
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346 ParseError.__init__( |
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347 self, _(b"unknown identifier: %s") % function, hint=hint |
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348 ) |
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349 |
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350 |
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351 class RepoError(Hint, Exception): |
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352 __bytes__ = _tobytes |
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354 |
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355 class RepoLookupError(RepoError): |
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356 pass |
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357 |
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358 |
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359 class FilteredRepoLookupError(RepoLookupError): |
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360 pass |
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361 |
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362 |
7637 | 363 class CapabilityError(RepoError): |
364 pass | |
7640 | 365 |
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366 |
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367 class RequirementError(RepoError): |
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368 """Exception raised if .hg/requires has an unknown entry.""" |
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369 |
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370 |
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371 class StdioError(IOError): |
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372 """Raised if I/O to stdout or stderr fails""" |
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373 |
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374 def __init__(self, err): |
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375 IOError.__init__(self, err.errno, err.strerror) |
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376 |
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377 # no __bytes__() because error message is derived from the standard IOError |
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378 |
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379 |
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380 class UnsupportedMergeRecords(Abort): |
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381 def __init__(self, recordtypes): |
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382 from .i18n import _ |
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383 |
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384 self.recordtypes = sorted(recordtypes) |
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385 s = b' '.join(self.recordtypes) |
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386 Abort.__init__( |
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387 self, |
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388 _(b'unsupported merge state records: %s') % s, |
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389 hint=_( |
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390 b'see https://mercurial-scm.org/wiki/MergeStateRecords for ' |
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391 b'more information' |
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392 ), |
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393 ) |
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394 |
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395 |
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396 class UnknownVersion(Abort): |
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397 """generic exception for aborting from an encounter with an unknown version""" |
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398 |
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399 def __init__(self, msg, hint=None, version=None): |
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400 self.version = version |
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401 super(UnknownVersion, self).__init__(msg, hint=hint) |
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402 |
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403 |
7640 | 404 class LockError(IOError): |
405 def __init__(self, errno, strerror, filename, desc): | |
406 IOError.__init__(self, errno, strerror, filename) | |
407 self.desc = desc | |
408 | |
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409 # no __bytes__() because error message is derived from the standard IOError |
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410 |
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411 |
7640 | 412 class LockHeld(LockError): |
413 def __init__(self, errno, filename, desc, locker): | |
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414 LockError.__init__(self, errno, b'Lock held', filename, desc) |
7640 | 415 self.locker = locker |
416 | |
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417 |
7640 | 418 class LockUnavailable(LockError): |
419 pass | |
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420 |
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421 |
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422 # LockError is for errors while acquiring the lock -- this is unrelated |
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423 class LockInheritanceContractViolation(RuntimeError): |
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424 __bytes__ = _tobytes |
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425 |
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426 |
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427 class ResponseError(Exception): |
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428 """Raised to print an error with part of output and exit.""" |
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429 |
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430 __bytes__ = _tobytes |
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431 |
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432 |
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433 # derived from KeyboardInterrupt to simplify some breakout code |
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434 class SignalInterrupt(KeyboardInterrupt): |
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435 """Exception raised on SIGTERM and SIGHUP.""" |
7646 | 436 |
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437 |
7646 | 438 class SignatureError(Exception): |
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439 __bytes__ = _tobytes |
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440 |
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441 |
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442 class PushRaced(RuntimeError): |
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443 """An exception raised during unbundling that indicate a push race""" |
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444 |
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445 __bytes__ = _tobytes |
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446 |
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447 |
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448 class ProgrammingError(Hint, RuntimeError): |
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449 """Raised if a mercurial (core or extension) developer made a mistake""" |
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450 |
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451 def __init__(self, msg, *args, **kwargs): |
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452 # On Python 3, turn the message back into a string since this is |
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453 # an internal-only error that won't be printed except in a |
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454 # stack traces. |
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455 msg = pycompat.sysstr(msg) |
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456 super(ProgrammingError, self).__init__(msg, *args, **kwargs) |
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457 |
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458 __bytes__ = _tobytes |
30573 | 459 |
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460 |
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461 class WdirUnsupported(Exception): |
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462 """An exception which is raised when 'wdir()' is not supported""" |
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463 |
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464 __bytes__ = _tobytes |
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465 |
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466 |
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467 # bundle2 related errors |
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468 class BundleValueError(ValueError): |
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469 """error raised when bundle2 cannot be processed""" |
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470 |
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471 __bytes__ = _tobytes |
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472 |
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473 |
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474 class BundleUnknownFeatureError(BundleValueError): |
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475 def __init__(self, parttype=None, params=(), values=()): |
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476 self.parttype = parttype |
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477 self.params = params |
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478 self.values = values |
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479 if self.parttype is None: |
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480 msg = b'Stream Parameter' |
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481 else: |
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482 msg = parttype |
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483 entries = self.params |
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484 if self.params and self.values: |
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485 assert len(self.params) == len(self.values) |
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486 entries = [] |
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487 for idx, par in enumerate(self.params): |
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488 val = self.values[idx] |
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489 if val is None: |
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490 entries.append(val) |
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491 else: |
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492 entries.append(b"%s=%r" % (par, pycompat.maybebytestr(val))) |
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493 if entries: |
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494 msg = b'%s - %s' % (msg, b', '.join(entries)) |
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495 ValueError.__init__(self, msg) |
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496 |
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497 |
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498 class ReadOnlyPartError(RuntimeError): |
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499 """error raised when code tries to alter a part being generated""" |
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500 |
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501 __bytes__ = _tobytes |
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502 |
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503 |
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504 class PushkeyFailed(Abort): |
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505 """error raised when a pushkey part failed to update a value""" |
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506 |
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507 def __init__( |
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508 self, partid, namespace=None, key=None, new=None, old=None, ret=None |
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509 ): |
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510 self.partid = partid |
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511 self.namespace = namespace |
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512 self.key = key |
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513 self.new = new |
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514 self.old = old |
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515 self.ret = ret |
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516 # no i18n expected to be processed into a better message |
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517 Abort.__init__( |
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518 self, b'failed to update value for "%s/%s"' % (namespace, key) |
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519 ) |
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520 |
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521 |
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522 class CensoredNodeError(StorageError): |
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523 """error raised when content verification fails on a censored node |
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524 |
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525 Also contains the tombstone data substituted for the uncensored data. |
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526 """ |
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527 |
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528 def __init__(self, filename, node, tombstone): |
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529 from .node import short |
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530 |
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531 StorageError.__init__(self, b'%s:%s' % (filename, short(node))) |
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532 self.tombstone = tombstone |
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533 |
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534 |
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535 class CensoredBaseError(StorageError): |
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536 """error raised when a delta is rejected because its base is censored |
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537 |
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538 A delta based on a censored revision must be formed as single patch |
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539 operation which replaces the entire base with new content. This ensures |
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540 the delta may be applied by clones which have not censored the base. |
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541 """ |
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542 |
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543 |
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544 class InvalidBundleSpecification(Exception): |
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545 """error raised when a bundle specification is invalid. |
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546 |
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547 This is used for syntax errors as opposed to support errors. |
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548 """ |
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549 |
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550 __bytes__ = _tobytes |
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551 |
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552 |
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553 class UnsupportedBundleSpecification(Exception): |
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554 """error raised when a bundle specification is not supported.""" |
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555 |
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556 __bytes__ = _tobytes |
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557 |
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558 |
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559 class CorruptedState(Exception): |
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560 """error raised when a command is not able to read its state from file""" |
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561 |
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562 __bytes__ = _tobytes |
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563 |
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564 |
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565 class PeerTransportError(Abort): |
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566 """Transport-level I/O error when communicating with a peer repo.""" |
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567 |
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568 |
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569 class InMemoryMergeConflictsError(Exception): |
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570 """Exception raised when merge conflicts arose during an in-memory merge.""" |
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571 |
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572 __bytes__ = _tobytes |
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573 |
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574 |
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575 class WireprotoCommandError(Exception): |
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576 """Represents an error during execution of a wire protocol command. |
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577 |
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578 Should only be thrown by wire protocol version 2 commands. |
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579 |
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580 The error is a formatter string and an optional iterable of arguments. |
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581 """ |
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582 |
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583 def __init__(self, message, args=None): |
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584 self.message = message |
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585 self.messageargs = args |