Mercurial > hg
annotate mercurial/error.py @ 47072:4c041c71ec01
revlog: introduce an explicit tracking of what the revlog is about
Since the dawn of time, people have been forced to rely to lossy introspection
of the index filename to determine what the purpose and role of the revlog they
encounter is. This is hacky, error prone, inflexible, abstraction-leaky,
<insert-your-own-complaints-here>.
In f63299ee7e4d Raphaël introduced a new attribute to track this information:
`revlog_kind`. However it is initialized in an odd place and various instances
end up not having it set. In addition is only tracking some of the information
we end up having to introspect in various pieces of code.
So we add a new attribute that holds more data and is more strictly enforced.
This work is done in collaboration with Raphaël.
The `revlog_kind` one will be removed/adapted in the next changeset. We expect
to be able to clean up various existing piece of code and to simplify coming
work around the newer revlog format.
Differential Revision: https://phab.mercurial-scm.org/D10352
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Tue, 06 Apr 2021 05:20:24 +0200 |
parents | abd18d6306f1 |
children | 33c0c25d0b0f |
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 Olivia Mackall <olivia@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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21 if pycompat.TYPE_CHECKING: |
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22 from typing import ( |
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23 Any, |
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24 AnyStr, |
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25 Iterable, |
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26 List, |
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27 Optional, |
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28 Sequence, |
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29 Union, |
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30 ) |
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32 |
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33 def _tobytes(exc): |
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34 """Byte-stringify exception in the same way as BaseException_str()""" |
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35 if not exc.args: |
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36 return b'' |
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37 if len(exc.args) == 1: |
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38 return pycompat.bytestr(exc.args[0]) |
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39 return b'(%s)' % b', '.join(b"'%s'" % pycompat.bytestr(a) for a in exc.args) |
7633 | 40 |
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41 |
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42 class Hint(object): |
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43 """Mix-in to provide a hint of an error |
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44 |
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45 This should come first in the inheritance list to consume a hint and |
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46 pass remaining arguments to the exception class. |
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47 """ |
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48 |
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49 def __init__(self, *args, **kw): |
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50 self.hint = kw.pop('hint', None) |
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51 super(Hint, self).__init__(*args, **kw) |
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52 |
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53 |
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54 class StorageError(Hint, Exception): |
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55 """Raised when an error occurs in a storage layer. |
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56 |
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57 Usually subclassed by a storage-specific exception. |
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58 """ |
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59 |
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60 __bytes__ = _tobytes |
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61 |
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62 |
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63 class RevlogError(StorageError): |
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64 pass |
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66 |
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67 class SidedataHashError(RevlogError): |
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68 def __init__(self, key, expected, got): |
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69 self.hint = None |
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70 self.sidedatakey = key |
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71 self.expecteddigest = expected |
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72 self.actualdigest = got |
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73 |
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74 |
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75 class FilteredIndexError(IndexError): |
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76 __bytes__ = _tobytes |
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77 |
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78 |
7633 | 79 class LookupError(RevlogError, KeyError): |
80 def __init__(self, name, index, message): | |
81 self.name = name | |
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82 self.index = index |
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83 # this can't be called 'message' because at least some installs of |
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84 # Python 2.6+ complain about the 'message' property being deprecated |
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85 self.lookupmessage = message |
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86 if isinstance(name, bytes) and len(name) == 20: |
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87 from .node import hex |
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88 |
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89 name = hex(name) |
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90 # if name is a binary node, it can be None |
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91 RevlogError.__init__( |
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92 self, b'%s@%s: %s' % (index, pycompat.bytestr(name), message) |
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93 ) |
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95 def __bytes__(self): |
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96 return RevlogError.__bytes__(self) |
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97 |
7633 | 98 def __str__(self): |
99 return RevlogError.__str__(self) | |
7636 | 100 |
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101 |
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102 class AmbiguousPrefixLookupError(LookupError): |
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103 pass |
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104 |
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105 |
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106 class FilteredLookupError(LookupError): |
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107 pass |
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108 |
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109 |
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110 class ManifestLookupError(LookupError): |
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111 pass |
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112 |
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113 |
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114 class CommandError(Exception): |
7636 | 115 """Exception raised on errors in parsing the command line.""" |
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116 |
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117 def __init__(self, command, message): |
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118 # type: (bytes, bytes) -> None |
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119 self.command = command |
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120 self.message = message |
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121 super(CommandError, self).__init__() |
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123 __bytes__ = _tobytes |
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125 |
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126 class UnknownCommand(Exception): |
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127 """Exception raised if command is not in the command table.""" |
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128 |
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129 def __init__(self, command, all_commands=None): |
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130 # type: (bytes, Optional[List[bytes]]) -> None |
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131 self.command = command |
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132 self.all_commands = all_commands |
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133 super(UnknownCommand, self).__init__() |
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134 |
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135 __bytes__ = _tobytes |
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136 |
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137 |
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138 class AmbiguousCommand(Exception): |
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139 """Exception raised if command shortcut matches more than one command.""" |
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140 |
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141 def __init__(self, prefix, matches): |
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142 # type: (bytes, List[bytes]) -> None |
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143 self.prefix = prefix |
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144 self.matches = matches |
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145 super(AmbiguousCommand, self).__init__() |
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146 |
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147 __bytes__ = _tobytes |
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148 |
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149 |
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150 class WorkerError(Exception): |
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151 """Exception raised when a worker process dies.""" |
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152 |
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153 def __init__(self, status_code): |
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154 # type: (int) -> None |
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155 self.status_code = status_code |
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156 # Pass status code to superclass just so it becomes part of __bytes__ |
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157 super(WorkerError, self).__init__(status_code) |
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158 |
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159 __bytes__ = _tobytes |
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160 |
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161 |
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162 class InterventionRequired(Hint, Exception): |
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163 """Exception raised when a command requires human intervention.""" |
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164 |
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165 __bytes__ = _tobytes |
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166 |
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167 |
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168 class ConflictResolutionRequired(InterventionRequired): |
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169 """Exception raised when a continuable command required merge conflict resolution.""" |
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170 |
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171 def __init__(self, opname): |
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172 # type: (bytes) -> None |
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173 from .i18n import _ |
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174 |
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175 self.opname = opname |
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176 InterventionRequired.__init__( |
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177 self, |
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178 _( |
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179 b"unresolved conflicts (see 'hg resolve', then 'hg %s --continue')" |
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180 ) |
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181 % opname, |
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182 ) |
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183 |
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184 |
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185 class Abort(Hint, Exception): |
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186 """Raised if a command needs to print an error and exit.""" |
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187 |
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188 def __init__(self, message, hint=None): |
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189 # type: (bytes, Optional[bytes]) -> None |
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190 self.message = message |
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191 self.hint = hint |
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192 # Pass the message into the Exception constructor to help extensions |
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193 # that look for exc.args[0]. |
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194 Exception.__init__(self, message) |
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195 |
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196 def __bytes__(self): |
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197 return self.message |
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198 |
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199 if pycompat.ispy3: |
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200 |
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201 def __str__(self): |
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202 # the output would be unreadable if the message was translated, |
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203 # but do not replace it with encoding.strfromlocal(), which |
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204 # may raise another exception. |
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205 return pycompat.sysstr(self.__bytes__()) |
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206 |
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207 def format(self): |
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208 # type: () -> bytes |
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209 from .i18n import _ |
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210 |
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211 message = _(b"abort: %s\n") % self.message |
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212 if self.hint: |
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213 message += _(b"(%s)\n") % self.hint |
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214 return message |
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215 |
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216 |
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217 class InputError(Abort): |
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218 """Indicates that the user made an error in their input. |
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219 |
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220 Examples: Invalid command, invalid flags, invalid revision. |
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221 """ |
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222 |
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223 |
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224 class StateError(Abort): |
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225 """Indicates that the operation might work if retried in a different state. |
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226 |
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227 Examples: Unresolved merge conflicts, unfinished operations. |
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228 """ |
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229 |
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230 |
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231 class CanceledError(Abort): |
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232 """Indicates that the user canceled the operation. |
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233 |
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234 Examples: Close commit editor with error status, quit chistedit. |
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235 """ |
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236 |
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237 |
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238 class SecurityError(Abort): |
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239 """Indicates that some aspect of security failed. |
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240 |
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241 Examples: Bad server credentials, expired local credentials for network |
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242 filesystem, mismatched GPG signature, DoS protection. |
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243 """ |
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244 |
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245 |
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246 class HookLoadError(Abort): |
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247 """raised when loading a hook fails, aborting an operation |
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248 |
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249 Exists to allow more specialized catching.""" |
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250 |
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251 |
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252 class HookAbort(Abort): |
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253 """raised when a validation hook fails, aborting an operation |
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254 |
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255 Exists to allow more specialized catching.""" |
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256 |
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257 |
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258 class ConfigError(Abort): |
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259 """Exception raised when parsing config files""" |
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260 |
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261 def __init__(self, message, location=None, hint=None): |
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262 # type: (bytes, Optional[bytes], Optional[bytes]) -> None |
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263 super(ConfigError, self).__init__(message, hint=hint) |
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264 self.location = location |
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265 |
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266 def format(self): |
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267 # type: () -> bytes |
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268 from .i18n import _ |
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269 |
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270 if self.location is not None: |
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271 message = _(b"config error at %s: %s\n") % ( |
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272 pycompat.bytestr(self.location), |
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273 self.message, |
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274 ) |
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275 else: |
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276 message = _(b"config error: %s\n") % self.message |
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277 if self.hint: |
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278 message += _(b"(%s)\n") % self.hint |
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279 return message |
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280 |
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281 |
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282 class UpdateAbort(Abort): |
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283 """Raised when an update is aborted for destination issue""" |
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284 |
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285 |
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286 class MergeDestAbort(Abort): |
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287 """Raised when an update is aborted for destination issues""" |
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288 |
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289 |
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290 class NoMergeDestAbort(MergeDestAbort): |
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291 """Raised when an update is aborted because there is nothing to merge""" |
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292 |
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293 |
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294 class ManyMergeDestAbort(MergeDestAbort): |
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295 """Raised when an update is aborted because destination is ambiguous""" |
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296 |
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297 |
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298 class ResponseExpected(Abort): |
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299 """Raised when an EOF is received for a prompt""" |
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300 |
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301 def __init__(self): |
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302 from .i18n import _ |
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303 |
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304 Abort.__init__(self, _(b'response expected')) |
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305 |
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306 |
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307 class RemoteError(Abort): |
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308 """Exception raised when interacting with a remote repo fails""" |
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309 |
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310 |
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311 class OutOfBandError(RemoteError): |
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312 """Exception raised when a remote repo reports failure""" |
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313 |
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314 def __init__(self, message=None, hint=None): |
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315 from .i18n import _ |
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316 |
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317 if message: |
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318 # Abort.format() adds a trailing newline |
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319 message = _(b"remote error:\n%s") % message.rstrip(b'\n') |
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320 else: |
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321 message = _(b"remote error") |
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322 super(OutOfBandError, self).__init__(message, hint=hint) |
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323 |
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324 |
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325 class ParseError(Abort): |
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326 """Raised when parsing config files and {rev,file}sets (msg[, pos])""" |
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327 |
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328 def __init__(self, message, location=None, hint=None): |
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329 # type: (bytes, Optional[Union[bytes, int]], Optional[bytes]) -> None |
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330 super(ParseError, self).__init__(message, hint=hint) |
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331 self.location = location |
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332 |
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333 def format(self): |
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334 # type: () -> bytes |
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335 from .i18n import _ |
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336 |
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337 if self.location is not None: |
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338 message = _(b"hg: parse error at %s: %s\n") % ( |
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339 pycompat.bytestr(self.location), |
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340 self.message, |
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341 ) |
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342 else: |
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343 message = _(b"hg: parse error: %s\n") % self.message |
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344 if self.hint: |
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345 message += _(b"(%s)\n") % self.hint |
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346 return message |
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347 |
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348 |
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349 class PatchError(Exception): |
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350 __bytes__ = _tobytes |
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351 |
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352 |
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353 def getsimilar(symbols, value): |
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354 # type: (Iterable[bytes], bytes) -> List[bytes] |
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355 sim = lambda x: difflib.SequenceMatcher(None, value, x).ratio() |
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356 # The cutoff for similarity here is pretty arbitrary. It should |
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357 # probably be investigated and tweaked. |
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358 return [s for s in symbols if sim(s) > 0.6] |
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359 |
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360 |
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361 def similarity_hint(similar): |
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362 # type: (List[bytes]) -> Optional[bytes] |
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363 from .i18n import _ |
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364 |
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365 if len(similar) == 1: |
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366 return _(b"did you mean %s?") % similar[0] |
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367 elif similar: |
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368 ss = b", ".join(sorted(similar)) |
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369 return _(b"did you mean one of %s?") % ss |
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370 else: |
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371 return None |
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372 |
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373 |
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374 class UnknownIdentifier(ParseError): |
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375 """Exception raised when a {rev,file}set references an unknown identifier""" |
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376 |
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377 def __init__(self, function, symbols): |
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378 # type: (bytes, Iterable[bytes]) -> None |
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379 from .i18n import _ |
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380 |
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381 similar = getsimilar(symbols, function) |
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382 hint = similarity_hint(similar) |
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383 |
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384 ParseError.__init__( |
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385 self, _(b"unknown identifier: %s") % function, hint=hint |
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386 ) |
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387 |
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388 |
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389 class RepoError(Hint, Exception): |
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390 __bytes__ = _tobytes |
7637 | 391 |
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392 |
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393 class RepoLookupError(RepoError): |
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394 pass |
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395 |
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396 |
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397 class FilteredRepoLookupError(RepoLookupError): |
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398 pass |
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399 |
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400 |
7637 | 401 class CapabilityError(RepoError): |
402 pass | |
7640 | 403 |
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404 |
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405 class RequirementError(RepoError): |
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406 """Exception raised if .hg/requires has an unknown entry.""" |
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407 |
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408 |
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409 class StdioError(IOError): |
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410 """Raised if I/O to stdout or stderr fails""" |
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411 |
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412 def __init__(self, err): |
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413 # type: (IOError) -> None |
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414 IOError.__init__(self, err.errno, err.strerror) |
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415 |
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416 # no __bytes__() because error message is derived from the standard IOError |
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417 |
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418 |
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419 class UnsupportedMergeRecords(Abort): |
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420 def __init__(self, recordtypes): |
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421 # type: (Iterable[bytes]) -> None |
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422 from .i18n import _ |
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423 |
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424 self.recordtypes = sorted(recordtypes) |
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425 s = b' '.join(self.recordtypes) |
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426 Abort.__init__( |
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427 self, |
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428 _(b'unsupported merge state records: %s') % s, |
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429 hint=_( |
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430 b'see https://mercurial-scm.org/wiki/MergeStateRecords for ' |
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431 b'more information' |
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432 ), |
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433 ) |
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434 |
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435 |
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436 class UnknownVersion(Abort): |
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437 """generic exception for aborting from an encounter with an unknown version""" |
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438 |
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439 def __init__(self, msg, hint=None, version=None): |
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440 # type: (bytes, Optional[bytes], Optional[bytes]) -> None |
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441 self.version = version |
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442 super(UnknownVersion, self).__init__(msg, hint=hint) |
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443 |
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444 |
7640 | 445 class LockError(IOError): |
446 def __init__(self, errno, strerror, filename, desc): | |
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447 # TODO: figure out if this should be bytes or str |
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448 # _type: (int, str, str, bytes) -> None |
7640 | 449 IOError.__init__(self, errno, strerror, filename) |
450 self.desc = desc | |
451 | |
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452 # no __bytes__() because error message is derived from the standard IOError |
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453 |
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454 |
7640 | 455 class LockHeld(LockError): |
456 def __init__(self, errno, filename, desc, locker): | |
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457 LockError.__init__(self, errno, b'Lock held', filename, desc) |
7640 | 458 self.locker = locker |
459 | |
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460 |
7640 | 461 class LockUnavailable(LockError): |
462 pass | |
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d2f753830f80
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|
463 |
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464 |
26355
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|
465 # LockError is for errors while acquiring the lock -- this is unrelated |
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26394
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466 class LockInheritanceContractViolation(RuntimeError): |
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467 __bytes__ = _tobytes |
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468 |
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469 |
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diff
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|
470 class ResponseError(Exception): |
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471 """Raised to print an error with part of output and exit.""" |
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472 |
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473 __bytes__ = _tobytes |
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474 |
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475 |
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476 # derived from KeyboardInterrupt to simplify some breakout code |
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|
477 class SignalInterrupt(KeyboardInterrupt): |
182b7114d35a
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|
478 """Exception raised on SIGTERM and SIGHUP.""" |
7646 | 479 |
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480 |
7646 | 481 class SignatureError(Exception): |
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482 __bytes__ = _tobytes |
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483 |
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484 |
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485 class PushRaced(RuntimeError): |
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486 """An exception raised during unbundling that indicate a push race""" |
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487 |
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488 __bytes__ = _tobytes |
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489 |
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490 |
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491 class ProgrammingError(Hint, RuntimeError): |
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492 """Raised if a mercurial (core or extension) developer made a mistake""" |
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493 |
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494 def __init__(self, msg, *args, **kwargs): |
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495 # type: (AnyStr, Any, Any) -> None |
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496 # On Python 3, turn the message back into a string since this is |
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497 # an internal-only error that won't be printed except in a |
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498 # stack traces. |
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499 msg = pycompat.sysstr(msg) |
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500 super(ProgrammingError, self).__init__(msg, *args, **kwargs) |
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501 |
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502 __bytes__ = _tobytes |
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504 |
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505 class WdirUnsupported(Exception): |
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506 """An exception which is raised when 'wdir()' is not supported""" |
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507 |
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508 __bytes__ = _tobytes |
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509 |
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510 |
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511 # bundle2 related errors |
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512 class BundleValueError(ValueError): |
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513 """error raised when bundle2 cannot be processed""" |
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514 |
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515 __bytes__ = _tobytes |
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516 |
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517 |
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518 class BundleUnknownFeatureError(BundleValueError): |
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519 def __init__(self, parttype=None, params=(), values=()): |
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520 self.parttype = parttype |
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521 self.params = params |
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522 self.values = values |
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523 if self.parttype is None: |
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524 msg = b'Stream Parameter' |
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525 else: |
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526 msg = parttype |
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527 entries = self.params |
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528 if self.params and self.values: |
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529 assert len(self.params) == len(self.values) |
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530 entries = [] |
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531 for idx, par in enumerate(self.params): |
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532 val = self.values[idx] |
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533 if val is None: |
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534 entries.append(val) |
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535 else: |
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536 entries.append(b"%s=%r" % (par, pycompat.maybebytestr(val))) |
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537 if entries: |
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538 msg = b'%s - %s' % (msg, b', '.join(entries)) |
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539 ValueError.__init__(self, msg) # TODO: convert to str? |
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540 |
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541 |
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542 class ReadOnlyPartError(RuntimeError): |
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543 """error raised when code tries to alter a part being generated""" |
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544 |
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545 __bytes__ = _tobytes |
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546 |
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547 |
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548 class PushkeyFailed(Abort): |
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549 """error raised when a pushkey part failed to update a value""" |
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550 |
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551 def __init__( |
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552 self, partid, namespace=None, key=None, new=None, old=None, ret=None |
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553 ): |
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554 self.partid = partid |
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555 self.namespace = namespace |
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556 self.key = key |
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557 self.new = new |
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558 self.old = old |
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559 self.ret = ret |
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560 # no i18n expected to be processed into a better message |
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561 Abort.__init__( |
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562 self, b'failed to update value for "%s/%s"' % (namespace, key) |
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563 ) |
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564 |
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565 |
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566 class CensoredNodeError(StorageError): |
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567 """error raised when content verification fails on a censored node |
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568 |
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569 Also contains the tombstone data substituted for the uncensored data. |
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570 """ |
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571 |
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572 def __init__(self, filename, node, tombstone): |
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573 # type: (bytes, bytes, bytes) -> None |
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574 from .node import short |
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575 |
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576 StorageError.__init__(self, b'%s:%s' % (filename, short(node))) |
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577 self.tombstone = tombstone |
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578 |
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579 |
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580 class CensoredBaseError(StorageError): |
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581 """error raised when a delta is rejected because its base is censored |
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582 |
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583 A delta based on a censored revision must be formed as single patch |
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584 operation which replaces the entire base with new content. This ensures |
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585 the delta may be applied by clones which have not censored the base. |
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586 """ |
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587 |
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588 |
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589 class InvalidBundleSpecification(Exception): |
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590 """error raised when a bundle specification is invalid. |
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591 |
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592 This is used for syntax errors as opposed to support errors. |
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593 """ |
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594 |
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595 __bytes__ = _tobytes |
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596 |
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597 |
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598 class UnsupportedBundleSpecification(Exception): |
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599 """error raised when a bundle specification is not supported.""" |
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600 |
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601 __bytes__ = _tobytes |
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602 |
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603 |
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604 class CorruptedState(Exception): |
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605 """error raised when a command is not able to read its state from file""" |
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606 |
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607 __bytes__ = _tobytes |
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608 |
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609 |
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610 class PeerTransportError(Abort): |
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611 """Transport-level I/O error when communicating with a peer repo.""" |
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612 |
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613 |
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614 class InMemoryMergeConflictsError(Exception): |
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615 """Exception raised when merge conflicts arose during an in-memory merge.""" |
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616 |
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617 __bytes__ = _tobytes |
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618 |
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619 |
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620 class WireprotoCommandError(Exception): |
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621 """Represents an error during execution of a wire protocol command. |
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622 |
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623 Should only be thrown by wire protocol version 2 commands. |
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624 |
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625 The error is a formatter string and an optional iterable of arguments. |
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626 """ |
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627 |
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628 def __init__(self, message, args=None): |
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629 # type: (bytes, Optional[Sequence[bytes]]) -> None |
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630 self.message = message |
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631 self.messageargs = args |