Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/filelog.py @ 46728:45f0d5297698

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changegroupv4: add sidedata helpers These helpers carry the information and computers needed to rewrite sidedata when generating/applying patches. We will be making use of them soon. Differential Revision: https://phab.mercurial-scm.org/D10029
author Rapha?l Gom?s <rgomes@octobus.net>
date Fri, 19 Feb 2021 11:15:42 +0100
parents f63299ee7e4d
children 6266d19556ad
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1 # filelog.py - file history class for mercurial
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2 #
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3 # Copyright 2005-2007 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
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 from .i18n import _
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11 from .node import (
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12 nullid,
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13 nullrev,
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14 )
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15 from . import (
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16 error,
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17 revlog,
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18 )
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19 from .interfaces import (
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20 repository,
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21 util as interfaceutil,
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22 )
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23 from .utils import storageutil
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24
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25
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26 @interfaceutil.implementer(repository.ifilestorage)
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27 class filelog(object):
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28 def __init__(self, opener, path):
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29 self._revlog = revlog.revlog(
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30 opener, b'/'.join((b'data', path + b'.i')), censorable=True
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31 )
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32 # Full name of the user visible file, relative to the repository root.
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33 # Used by LFS.
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34 self._revlog.filename = path
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35 self._revlog.revlog_kind = b'filelog'
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36
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37 def __len__(self):
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38 return len(self._revlog)
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39
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40 def __iter__(self):
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41 return self._revlog.__iter__()
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42
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43 def hasnode(self, node):
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44 if node in (nullid, nullrev):
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45 return False
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46
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47 try:
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48 self._revlog.rev(node)
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49 return True
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50 except (TypeError, ValueError, IndexError, error.LookupError):
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51 return False
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52
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53 def revs(self, start=0, stop=None):
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54 return self._revlog.revs(start=start, stop=stop)
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55
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56 def parents(self, node):
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57 return self._revlog.parents(node)
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58
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59 def parentrevs(self, rev):
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60 return self._revlog.parentrevs(rev)
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61
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62 def rev(self, node):
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63 return self._revlog.rev(node)
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64
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65 def node(self, rev):
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66 return self._revlog.node(rev)
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67
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68 def lookup(self, node):
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69 return storageutil.fileidlookup(
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70 self._revlog, node, self._revlog.indexfile
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71 )
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72
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73 def linkrev(self, rev):
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74 return self._revlog.linkrev(rev)
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75
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76 def commonancestorsheads(self, node1, node2):
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77 return self._revlog.commonancestorsheads(node1, node2)
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78
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79 # Used by dagop.blockdescendants().
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80 def descendants(self, revs):
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81 return self._revlog.descendants(revs)
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82
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83 def heads(self, start=None, stop=None):
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84 return self._revlog.heads(start, stop)
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85
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86 # Used by hgweb, children extension.
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87 def children(self, node):
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88 return self._revlog.children(node)
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89
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90 def iscensored(self, rev):
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91 return self._revlog.iscensored(rev)
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92
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93 def revision(self, node, _df=None, raw=False):
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94 return self._revlog.revision(node, _df=_df, raw=raw)
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95
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96 def rawdata(self, node, _df=None):
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97 return self._revlog.rawdata(node, _df=_df)
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98
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99 def emitrevisions(
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100 self,
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101 nodes,
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102 nodesorder=None,
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103 revisiondata=False,
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104 assumehaveparentrevisions=False,
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105 deltamode=repository.CG_DELTAMODE_STD,
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106 sidedata_helpers=None,
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107 ):
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108 return self._revlog.emitrevisions(
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109 nodes,
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110 nodesorder=nodesorder,
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111 revisiondata=revisiondata,
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112 assumehaveparentrevisions=assumehaveparentrevisions,
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113 deltamode=deltamode,
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114 sidedata_helpers=sidedata_helpers,
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115 )
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116
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117 def addrevision(
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118 self,
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119 revisiondata,
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120 transaction,
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121 linkrev,
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122 p1,
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123 p2,
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124 node=None,
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125 flags=revlog.REVIDX_DEFAULT_FLAGS,
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126 cachedelta=None,
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127 ):
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128 return self._revlog.addrevision(
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129 revisiondata,
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130 transaction,
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131 linkrev,
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132 p1,
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133 p2,
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134 node=node,
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135 flags=flags,
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136 cachedelta=cachedelta,
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137 )
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138
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139 def addgroup(
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140 self,
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141 deltas,
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142 linkmapper,
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143 transaction,
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144 addrevisioncb=None,
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145 duplicaterevisioncb=None,
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146 maybemissingparents=False,
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147 ):
40389
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148 if maybemissingparents:
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149 raise error.Abort(
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150 _(
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151 b'revlog storage does not support missing '
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152 b'parents write mode'
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153 )
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154 )
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155
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156 return self._revlog.addgroup(
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157 deltas,
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158 linkmapper,
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159 transaction,
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160 addrevisioncb=addrevisioncb,
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161 duplicaterevisioncb=duplicaterevisioncb,
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162 )
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163
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164 def getstrippoint(self, minlink):
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165 return self._revlog.getstrippoint(minlink)
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166
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167 def strip(self, minlink, transaction):
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168 return self._revlog.strip(minlink, transaction)
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169
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170 def censorrevision(self, tr, node, tombstone=b''):
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171 return self._revlog.censorrevision(tr, node, tombstone=tombstone)
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172
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173 def files(self):
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174 return self._revlog.files()
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175
0
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mpm@selenic.com
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176 def read(self, node):
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177 return storageutil.filtermetadata(self.revision(node))
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178
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parents: 358
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179 def add(self, text, meta, transaction, link, p1=None, p2=None):
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180 if meta or text.startswith(b'\1\n'):
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181 text = storageutil.packmeta(meta, text)
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182 rev = self.addrevision(text, transaction, link, p1, p2)
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183 return self.node(rev)
0
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184
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185 def renamed(self, node):
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186 return storageutil.filerevisioncopied(self, node)
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187
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188 def size(self, rev):
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189 """return the size of a given revision"""
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190
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191 # for revisions with renames, we have to go the slow way
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192 node = self.node(rev)
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193 if self.renamed(node):
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194 return len(self.read(node))
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Mike Edgar <adgar@google.com>
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195 if self.iscensored(rev):
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Mike Edgar <adgar@google.com>
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196 return 0
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197
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198 # XXX if self.read(node).startswith("\1\n"), this returns (size+4)
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199 return self._revlog.size(rev)
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200
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parents: 2859
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201 def cmp(self, node, text):
11539
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202 """compare text with a given file revision
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203
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204 returns True if text is different than what is stored.
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205 """
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206 return not storageutil.filedataequivalent(self, node, text)
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207
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208 def verifyintegrity(self, state):
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209 return self._revlog.verifyintegrity(state)
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210
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211 def storageinfo(
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212 self,
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213 exclusivefiles=False,
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214 sharedfiles=False,
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215 revisionscount=False,
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216 trackedsize=False,
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217 storedsize=False,
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218 ):
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219 return self._revlog.storageinfo(
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220 exclusivefiles=exclusivefiles,
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221 sharedfiles=sharedfiles,
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222 revisionscount=revisionscount,
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223 trackedsize=trackedsize,
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224 storedsize=storedsize,
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parents: 42824
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225 )
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diff changeset
226
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227 # TODO these aren't part of the interface and aren't internal methods.
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228 # Callers should be fixed to not use them.
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229
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230 # Used by bundlefilelog, unionfilelog.
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diff changeset
231 @property
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232 def indexfile(self):
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parents: 37443
diff changeset
233 return self._revlog.indexfile
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
234
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Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
235 @indexfile.setter
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
236 def indexfile(self, value):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
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237 self._revlog.indexfile = value
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238
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239 # Used by repo upgrade.
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240 def clone(self, tr, destrevlog, **kwargs):
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parents: 37443
diff changeset
241 if not isinstance(destrevlog, filelog):
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parents: 43076
diff changeset
242 raise error.ProgrammingError(b'expected filelog to clone()')
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243
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
244 return self._revlog.clone(tr, destrevlog._revlog, **kwargs)
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parents: 37443
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245
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246
39781
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247 class narrowfilelog(filelog):
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248 """Filelog variation to be used with narrow stores."""
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249
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250 def __init__(self, opener, path, narrowmatch):
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251 super(narrowfilelog, self).__init__(opener, path)
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252 self._narrowmatch = narrowmatch
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253
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254 def renamed(self, node):
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parents: 39310
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255 res = super(narrowfilelog, self).renamed(node)
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parents: 39310
diff changeset
256
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parents: 39310
diff changeset
257 # Renames that come from outside the narrowspec are problematic
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parents: 39310
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258 # because we may lack the base text for the rename. This can result
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
259 # in code attempting to walk the ancestry or compute a diff
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
260 # encountering a missing revision. We address this by silently
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parents: 39310
diff changeset
261 # removing rename metadata if the source file is outside the
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parents: 39310
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262 # narrow spec.
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263 #
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parents: 39310
diff changeset
264 # A better solution would be to see if the base revision is available,
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
265 # rather than assuming it isn't.
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parents: 39310
diff changeset
266 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
267 # An even better solution would be to teach all consumers of rename
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parents: 39310
diff changeset
268 # metadata that the base revision may not be available.
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parents: 39310
diff changeset
269 #
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parents: 39310
diff changeset
270 # TODO consider better ways of doing this.
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parents: 39310
diff changeset
271 if res and not self._narrowmatch(res[0]):
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parents: 39310
diff changeset
272 return None
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parents: 39310
diff changeset
273
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parents: 39310
diff changeset
274 return res
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parents: 39310
diff changeset
275
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parents: 39310
diff changeset
276 def size(self, rev):
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Gregory Szorc <gregory.szorc@gmail.com>
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277 # Because we have a custom renamed() that may lie, we need to call
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278 # the base renamed() to report accurate results.
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279 node = self.node(rev)
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280 if super(narrowfilelog, self).renamed(node):
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281 return len(self.read(node))
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282 else:
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283 return super(narrowfilelog, self).size(rev)
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284
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285 def cmp(self, node, text):
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286 # We don't call `super` because narrow parents can be buggy in case of a
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287 # ambiguous dirstate. Always take the slow path until there is a better
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288 # fix, see issue6150.
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289
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290 # Censored files compare against the empty file.
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291 if self.iscensored(self.rev(node)):
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292 return text != b''
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293
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294 return self.read(node) != text