Mercurial > hg
annotate mercurial/filelog.py @ 46858:85e3a630cad9
revlog: move the details of revlog "v2" index inside revlog.utils.constants
the revlog module is quite large and this kind of format information would handy
for other module. So let us start to gather this information about the format in
a more appropriate place.
We update various reference to this information to use the new "source of truth"
in the process.
Differential Revision: https://phab.mercurial-scm.org/D10305
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Mon, 05 Apr 2021 12:21:12 +0200 |
parents | d4ba4d51f85f |
children | d55b71393907 |
rev | line source |
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1089 | 1 # filelog.py - file history class for mercurial |
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2 # |
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3 # Copyright 2005-2007 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. |
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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 self.nullid = self._revlog.nullid |
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37 |
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38 def __len__(self): |
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39 return len(self._revlog) |
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40 |
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41 def __iter__(self): |
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42 return self._revlog.__iter__() |
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43 |
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44 def hasnode(self, node): |
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45 if node in (nullid, nullrev): |
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46 return False |
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47 |
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48 try: |
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49 self._revlog.rev(node) |
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50 return True |
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51 except (TypeError, ValueError, IndexError, error.LookupError): |
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52 return False |
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53 |
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54 def revs(self, start=0, stop=None): |
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55 return self._revlog.revs(start=start, stop=stop) |
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56 |
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57 def parents(self, node): |
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58 return self._revlog.parents(node) |
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59 |
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60 def parentrevs(self, rev): |
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61 return self._revlog.parentrevs(rev) |
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62 |
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63 def rev(self, node): |
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64 return self._revlog.rev(node) |
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65 |
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66 def node(self, rev): |
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67 return self._revlog.node(rev) |
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68 |
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69 def lookup(self, node): |
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70 return storageutil.fileidlookup( |
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71 self._revlog, node, self._revlog.indexfile |
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72 ) |
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73 |
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74 def linkrev(self, rev): |
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75 return self._revlog.linkrev(rev) |
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76 |
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77 def commonancestorsheads(self, node1, node2): |
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78 return self._revlog.commonancestorsheads(node1, node2) |
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79 |
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80 # Used by dagop.blockdescendants(). |
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81 def descendants(self, revs): |
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82 return self._revlog.descendants(revs) |
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83 |
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84 def heads(self, start=None, stop=None): |
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85 return self._revlog.heads(start, stop) |
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86 |
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87 # Used by hgweb, children extension. |
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88 def children(self, node): |
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89 return self._revlog.children(node) |
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90 |
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91 def iscensored(self, rev): |
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92 return self._revlog.iscensored(rev) |
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93 |
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94 def revision(self, node, _df=None, raw=False): |
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95 return self._revlog.revision(node, _df=_df, raw=raw) |
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96 |
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97 def rawdata(self, node, _df=None): |
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98 return self._revlog.rawdata(node, _df=_df) |
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99 |
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100 def emitrevisions( |
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101 self, |
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102 nodes, |
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103 nodesorder=None, |
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104 revisiondata=False, |
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105 assumehaveparentrevisions=False, |
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106 deltamode=repository.CG_DELTAMODE_STD, |
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107 sidedata_helpers=None, |
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108 ): |
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109 return self._revlog.emitrevisions( |
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110 nodes, |
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111 nodesorder=nodesorder, |
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112 revisiondata=revisiondata, |
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113 assumehaveparentrevisions=assumehaveparentrevisions, |
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114 deltamode=deltamode, |
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115 sidedata_helpers=sidedata_helpers, |
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116 ) |
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117 |
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118 def addrevision( |
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119 self, |
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120 revisiondata, |
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121 transaction, |
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122 linkrev, |
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123 p1, |
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124 p2, |
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125 node=None, |
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126 flags=revlog.REVIDX_DEFAULT_FLAGS, |
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127 cachedelta=None, |
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128 ): |
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129 return self._revlog.addrevision( |
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130 revisiondata, |
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131 transaction, |
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132 linkrev, |
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133 p1, |
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134 p2, |
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135 node=node, |
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136 flags=flags, |
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137 cachedelta=cachedelta, |
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138 ) |
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139 |
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140 def addgroup( |
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141 self, |
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142 deltas, |
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143 linkmapper, |
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144 transaction, |
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145 addrevisioncb=None, |
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146 duplicaterevisioncb=None, |
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147 maybemissingparents=False, |
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148 ): |
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149 if maybemissingparents: |
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150 raise error.Abort( |
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151 _( |
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152 b'revlog storage does not support missing ' |
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153 b'parents write mode' |
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154 ) |
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155 ) |
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156 |
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157 return self._revlog.addgroup( |
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158 deltas, |
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159 linkmapper, |
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160 transaction, |
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161 addrevisioncb=addrevisioncb, |
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162 duplicaterevisioncb=duplicaterevisioncb, |
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163 ) |
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164 |
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165 def getstrippoint(self, minlink): |
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166 return self._revlog.getstrippoint(minlink) |
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167 |
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168 def strip(self, minlink, transaction): |
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169 return self._revlog.strip(minlink, transaction) |
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170 |
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171 def censorrevision(self, tr, node, tombstone=b''): |
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172 return self._revlog.censorrevision(tr, node, tombstone=tombstone) |
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173 |
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174 def files(self): |
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175 return self._revlog.files() |
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176 |
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177 def read(self, node): |
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178 return storageutil.filtermetadata(self.revision(node)) |
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180 def add(self, text, meta, transaction, link, p1=None, p2=None): | |
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181 if meta or text.startswith(b'\1\n'): |
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182 text = storageutil.packmeta(meta, text) |
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183 rev = self.addrevision(text, transaction, link, p1, p2) |
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184 return self.node(rev) |
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185 |
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187 return storageutil.filerevisioncopied(self, node) |
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189 def size(self, rev): |
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190 """return the size of a given revision""" |
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191 |
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192 # for revisions with renames, we have to go the slow way |
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193 node = self.node(rev) |
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194 if self.renamed(node): |
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195 return len(self.read(node)) |
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196 if self.iscensored(rev): |
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197 return 0 |
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198 |
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199 # XXX if self.read(node).startswith("\1\n"), this returns (size+4) |
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200 return self._revlog.size(rev) |
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201 |
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202 def cmp(self, node, text): |
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203 """compare text with a given file revision |
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204 |
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205 returns True if text is different than what is stored. |
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206 """ |
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207 return not storageutil.filedataequivalent(self, node, text) |
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208 |
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209 def verifyintegrity(self, state): |
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210 return self._revlog.verifyintegrity(state) |
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211 |
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212 def storageinfo( |
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213 self, |
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214 exclusivefiles=False, |
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215 sharedfiles=False, |
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216 revisionscount=False, |
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217 trackedsize=False, |
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218 storedsize=False, |
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219 ): |
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220 return self._revlog.storageinfo( |
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221 exclusivefiles=exclusivefiles, |
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222 sharedfiles=sharedfiles, |
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223 revisionscount=revisionscount, |
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224 trackedsize=trackedsize, |
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225 storedsize=storedsize, |
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226 ) |
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227 |
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228 # TODO these aren't part of the interface and aren't internal methods. |
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229 # Callers should be fixed to not use them. |
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230 |
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231 # Used by bundlefilelog, unionfilelog. |
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232 @property |
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233 def indexfile(self): |
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234 return self._revlog.indexfile |
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235 |
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236 @indexfile.setter |
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237 def indexfile(self, value): |
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238 self._revlog.indexfile = value |
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239 |
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240 # Used by repo upgrade. |
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241 def clone(self, tr, destrevlog, **kwargs): |
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242 if not isinstance(destrevlog, filelog): |
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243 raise error.ProgrammingError(b'expected filelog to clone()') |
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244 |
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245 return self._revlog.clone(tr, destrevlog._revlog, **kwargs) |
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246 |
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247 |
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248 class narrowfilelog(filelog): |
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249 """Filelog variation to be used with narrow stores.""" |
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250 |
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251 def __init__(self, opener, path, narrowmatch): |
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252 super(narrowfilelog, self).__init__(opener, path) |
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253 self._narrowmatch = narrowmatch |
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254 |
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255 def renamed(self, node): |
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256 res = super(narrowfilelog, self).renamed(node) |
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257 |
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258 # Renames that come from outside the narrowspec are problematic |
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259 # because we may lack the base text for the rename. This can result |
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260 # in code attempting to walk the ancestry or compute a diff |
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261 # encountering a missing revision. We address this by silently |
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262 # removing rename metadata if the source file is outside the |
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263 # narrow spec. |
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264 # |
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265 # A better solution would be to see if the base revision is available, |
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266 # rather than assuming it isn't. |
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267 # |
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268 # An even better solution would be to teach all consumers of rename |
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269 # metadata that the base revision may not be available. |
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270 # |
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271 # TODO consider better ways of doing this. |
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272 if res and not self._narrowmatch(res[0]): |
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273 return None |
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274 |
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275 return res |
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276 |
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277 def size(self, rev): |
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278 # Because we have a custom renamed() that may lie, we need to call |
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279 # the base renamed() to report accurate results. |
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280 node = self.node(rev) |
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281 if super(narrowfilelog, self).renamed(node): |
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282 return len(self.read(node)) |
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283 else: |
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284 return super(narrowfilelog, self).size(rev) |
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285 |
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286 def cmp(self, node, text): |
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287 # We don't call `super` because narrow parents can be buggy in case of a |
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288 # ambiguous dirstate. Always take the slow path until there is a better |
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289 # fix, see issue6150. |
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290 |
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291 # Censored files compare against the empty file. |
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292 if self.iscensored(self.rev(node)): |
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293 return text != b'' |
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294 |
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295 return self.read(node) != text |