Mercurial > hg
annotate mercurial/error.py @ 26755:bb0b955d050d
streamclone: support for producing and consuming stream clone bundles
Up to this point, stream clones only existed as a dynamically generated
data format produced and consumed during streaming clones. In order to
support this efficient cloning format with the clone bundles feature, we
need a more formal, on disk representation of the streaming clone data.
This patch introduces a new "bundle" type for streaming clones. Unlike
existing bundles, it does not contain changegroup data. It does,
however, share the same concepts like the 4 byte header which identifies
the type of data that follows and the 2 byte abbreviation for
compression types (of which only "UN" is currently supported).
The new bundle format is essentially the existing stream clone version 1
data format with some headers at the beginning.
Content negotiation at stream clone request time checked for repository
format/requirements compatibility before initiating a stream clone. We
can't do active content negotiation when using clone bundles. So, we put
this set of requirements inside the payload so consumers have a built-in
mechanism for checking compatibility before reading and applying lots of
data. Of course, we will also advertise this requirements set in clone
bundles. But that's for another patch.
We currently don't have a mechanism to produce and consume this new
bundle format. This will be implemented in upcoming patches.
It's worth noting that if a legacy client attempts to `hg unbundle` a
stream clone bundle (with the "HGS1" header), it will abort with:
"unknown bundle version S1," which seems appropriate.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 17 Oct 2015 11:14:52 -0700 |
parents | 338af85109dd |
children | 5e46123e6c35 |
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 |
7633 | 16 # Do not import anything here, please |
17 | |
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18 class HintException(Exception): |
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19 def __init__(self, *args, **kw): |
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20 Exception.__init__(self, *args) |
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21 self.hint = kw.get('hint') |
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22 |
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23 class RevlogError(HintException): |
7633 | 24 pass |
25 | |
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26 class FilteredIndexError(IndexError): |
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27 pass |
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28 |
7633 | 29 class LookupError(RevlogError, KeyError): |
30 def __init__(self, name, index, message): | |
31 self.name = name | |
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32 self.index = index |
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33 # this can't be called 'message' because at least some installs of |
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34 # Python 2.6+ complain about the 'message' property being deprecated |
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35 self.lookupmessage = message |
7633 | 36 if isinstance(name, str) and len(name) == 20: |
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37 from .node import short |
7633 | 38 name = short(name) |
39 RevlogError.__init__(self, '%s@%s: %s' % (index, name, message)) | |
40 | |
41 def __str__(self): | |
42 return RevlogError.__str__(self) | |
7636 | 43 |
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44 class FilteredLookupError(LookupError): |
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45 pass |
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46 |
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47 class ManifestLookupError(LookupError): |
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48 pass |
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49 |
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50 class CommandError(Exception): |
7636 | 51 """Exception raised on errors in parsing the command line.""" |
7637 | 52 |
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53 class InterventionRequired(Exception): |
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54 """Exception raised when a command requires human intervention.""" |
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55 |
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56 class Abort(HintException): |
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57 """Raised if a command needs to print an error and exit.""" |
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58 |
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59 class HookLoadError(Abort): |
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60 """raised when loading a hook fails, aborting an operation |
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61 |
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62 Exists to allow more specialized catching.""" |
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63 |
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64 class HookAbort(Abort): |
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65 """raised when a validation hook fails, aborting an operation |
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66 |
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67 Exists to allow more specialized catching.""" |
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68 |
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69 class ConfigError(Abort): |
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70 """Exception raised when parsing config files""" |
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71 |
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72 class UpdateAbort(Abort): |
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73 """Raised when an update is aborted for destination issue""" |
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74 |
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75 class OutOfBandError(Exception): |
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76 """Exception raised when a remote repo reports failure""" |
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77 |
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78 def __init__(self, *args, **kw): |
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79 Exception.__init__(self, *args) |
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80 self.hint = kw.get('hint') |
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81 |
11292 | 82 class ParseError(Exception): |
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83 """Raised when parsing config files and {rev,file}sets (msg[, pos])""" |
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84 |
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85 class UnknownIdentifier(ParseError): |
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86 """Exception raised when a {rev,file}set references an unknown identifier""" |
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87 |
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88 def __init__(self, function, symbols): |
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89 from .i18n import _ |
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90 ParseError.__init__(self, _("unknown identifier: %s") % function) |
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91 self.function = function |
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92 self.symbols = symbols |
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93 |
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94 class RepoError(HintException): |
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95 pass |
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97 class RepoLookupError(RepoError): |
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98 pass |
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99 |
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100 class FilteredRepoLookupError(RepoLookupError): |
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101 pass |
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102 |
7637 | 103 class CapabilityError(RepoError): |
104 pass | |
7640 | 105 |
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106 class RequirementError(RepoError): |
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107 """Exception raised if .hg/requires has an unknown entry.""" |
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108 |
7640 | 109 class LockError(IOError): |
110 def __init__(self, errno, strerror, filename, desc): | |
111 IOError.__init__(self, errno, strerror, filename) | |
112 self.desc = desc | |
113 | |
114 class LockHeld(LockError): | |
115 def __init__(self, errno, filename, desc, locker): | |
116 LockError.__init__(self, errno, 'Lock held', filename, desc) | |
117 self.locker = locker | |
118 | |
119 class LockUnavailable(LockError): | |
120 pass | |
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121 |
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122 # LockError is for errors while acquiring the lock -- this is unrelated |
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123 class LockInheritanceContractViolation(RuntimeError): |
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124 pass |
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125 |
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126 class ResponseError(Exception): |
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127 """Raised to print an error with part of output and exit.""" |
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128 |
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129 class UnknownCommand(Exception): |
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130 """Exception raised if command is not in the command table.""" |
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131 |
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132 class AmbiguousCommand(Exception): |
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133 """Exception raised if command shortcut matches more than one command.""" |
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134 |
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135 # derived from KeyboardInterrupt to simplify some breakout code |
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136 class SignalInterrupt(KeyboardInterrupt): |
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137 """Exception raised on SIGTERM and SIGHUP.""" |
7646 | 138 |
139 class SignatureError(Exception): | |
140 pass | |
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141 |
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142 class PushRaced(RuntimeError): |
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143 """An exception raised during unbundling that indicate a push race""" |
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144 |
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145 # bundle2 related errors |
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146 class BundleValueError(ValueError): |
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147 """error raised when bundle2 cannot be processed""" |
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148 |
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149 class BundleUnknownFeatureError(BundleValueError): |
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150 def __init__(self, parttype=None, params=(), values=()): |
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151 self.parttype = parttype |
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152 self.params = params |
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153 self.values = values |
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154 if self.parttype is None: |
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155 msg = 'Stream Parameter' |
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156 else: |
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157 msg = parttype |
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158 entries = self.params |
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159 if self.params and self.values: |
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160 assert len(self.params) == len(self.values) |
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161 entries = [] |
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162 for idx, par in enumerate(self.params): |
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163 val = self.values[idx] |
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164 if val is None: |
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165 entries.append(val) |
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166 else: |
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167 entries.append("%s=%r" % (par, val)) |
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168 if entries: |
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169 msg = '%s - %s' % (msg, ', '.join(entries)) |
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170 ValueError.__init__(self, msg) |
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171 |
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172 class ReadOnlyPartError(RuntimeError): |
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173 """error raised when code tries to alter a part being generated""" |
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174 |
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175 class PushkeyFailed(Abort): |
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176 """error raised when a pushkey part failed to update a value""" |
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177 |
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178 def __init__(self, partid, namespace=None, key=None, new=None, old=None, |
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179 ret=None): |
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180 self.partid = partid |
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181 self.namespace = namespace |
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182 self.key = key |
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183 self.new = new |
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184 self.old = old |
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185 self.ret = ret |
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186 # no i18n expected to be processed into a better message |
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187 Abort.__init__(self, 'failed to update value for "%s/%s"' |
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188 % (namespace, key)) |
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189 |
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190 class CensoredNodeError(RevlogError): |
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191 """error raised when content verification fails on a censored node |
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192 |
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193 Also contains the tombstone data substituted for the uncensored data. |
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194 """ |
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195 |
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196 def __init__(self, filename, node, tombstone): |
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197 from .node import short |
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198 RevlogError.__init__(self, '%s:%s' % (filename, short(node))) |
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199 self.tombstone = tombstone |
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200 |
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201 class CensoredBaseError(RevlogError): |
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202 """error raised when a delta is rejected because its base is censored |
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203 |
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204 A delta based on a censored revision must be formed as single patch |
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205 operation which replaces the entire base with new content. This ensures |
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206 the delta may be applied by clones which have not censored the base. |
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207 """ |
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208 |
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209 class InvalidBundleSpecification(Exception): |
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210 """error raised when a bundle specification is invalid. |
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211 |
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212 This is used for syntax errors as opposed to support errors. |
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213 """ |
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214 |
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215 class UnsupportedBundleSpecification(Exception): |
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216 """error raised when a bundle specification is not supported.""" |