Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/filelog.py @ 39998:2f80eaf38ed4

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filelog: remove revdiff() (API) This proxy method is no longer used. While it might be useful to query a storage backend for the delta between any 2 revisions because the store could have a delta cached and could compute it more efficiently than the caller calling revision() twice in order to compute a delta, since nothing in core is using this API now, I feel comfortable nuking it. Differential Revision: https://phab.mercurial-scm.org/D4792
author Gregory Szorc <gregory.szorc@gmail.com>
date Fri, 28 Sep 2018 09:28:38 -0700
parents 1b65fb4d43d6
children 44c98cbc665f
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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 . import (
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11 error,
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12 repository,
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13 revlog,
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14 )
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15 from .utils import (
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16 interfaceutil,
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17 storageutil,
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18 )
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19
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20 @interfaceutil.implementer(repository.ifilestorage)
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21 class filelog(object):
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22 def __init__(self, opener, path):
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23 self._revlog = revlog.revlog(opener,
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24 '/'.join(('data', path + '.i')),
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25 censorable=True)
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26 # Full name of the user visible file, relative to the repository root.
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27 # Used by LFS.
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28 self._revlog.filename = path
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29
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30 def __len__(self):
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31 return len(self._revlog)
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32
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33 def __iter__(self):
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34 return self._revlog.__iter__()
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35
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36 def revs(self, start=0, stop=None):
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37 return self._revlog.revs(start=start, stop=stop)
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38
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39 def parents(self, node):
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40 return self._revlog.parents(node)
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41
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42 def parentrevs(self, rev):
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43 return self._revlog.parentrevs(rev)
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44
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45 def rev(self, node):
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46 return self._revlog.rev(node)
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47
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48 def node(self, rev):
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49 return self._revlog.node(rev)
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50
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51 def lookup(self, node):
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52 return self._revlog.lookup(node)
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53
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54 def linkrev(self, rev):
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55 return self._revlog.linkrev(rev)
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56
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57 def commonancestorsheads(self, node1, node2):
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58 return self._revlog.commonancestorsheads(node1, node2)
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59
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60 # Used by dagop.blockdescendants().
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61 def descendants(self, revs):
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62 return self._revlog.descendants(revs)
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63
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64 def heads(self, start=None, stop=None):
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65 return self._revlog.heads(start, stop)
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66
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67 # Used by hgweb, children extension.
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68 def children(self, node):
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69 return self._revlog.children(node)
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70
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71 def iscensored(self, rev):
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72 return self._revlog.iscensored(rev)
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73
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74 # Might be unused.
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75 def checkhash(self, text, node, p1=None, p2=None, rev=None):
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76 return self._revlog.checkhash(text, node, p1=p1, p2=p2, rev=rev)
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77
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78 def revision(self, node, _df=None, raw=False):
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79 return self._revlog.revision(node, _df=_df, raw=raw)
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80
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81 def emitrevisions(self, nodes, nodesorder=None,
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82 revisiondata=False, assumehaveparentrevisions=False,
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83 deltaprevious=False):
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84 return self._revlog.emitrevisions(
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85 nodes, nodesorder=nodesorder, revisiondata=revisiondata,
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86 assumehaveparentrevisions=assumehaveparentrevisions,
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87 deltaprevious=deltaprevious)
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88
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89 def addrevision(self, revisiondata, transaction, linkrev, p1, p2,
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90 node=None, flags=revlog.REVIDX_DEFAULT_FLAGS,
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91 cachedelta=None):
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92 return self._revlog.addrevision(revisiondata, transaction, linkrev,
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93 p1, p2, node=node, flags=flags,
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94 cachedelta=cachedelta)
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95
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96 def addgroup(self, deltas, linkmapper, transaction, addrevisioncb=None):
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97 return self._revlog.addgroup(deltas, linkmapper, transaction,
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98 addrevisioncb=addrevisioncb)
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99
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100 def getstrippoint(self, minlink):
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101 return self._revlog.getstrippoint(minlink)
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102
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103 def strip(self, minlink, transaction):
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104 return self._revlog.strip(minlink, transaction)
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105
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106 def censorrevision(self, tr, node, tombstone=b''):
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107 return self._revlog.censorrevision(node, tombstone=tombstone)
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108
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109 def files(self):
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110 return self._revlog.files()
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111
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112 def read(self, node):
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113 return storageutil.filtermetadata(self.revision(node))
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114
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115 def add(self, text, meta, transaction, link, p1=None, p2=None):
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116 if meta or text.startswith('\1\n'):
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117 text = storageutil.packmeta(meta, text)
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118 return self.addrevision(text, transaction, link, p1, p2)
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119
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120 def renamed(self, node):
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121 if self.parents(node)[0] != revlog.nullid:
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122 return False
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123 t = self.revision(node)
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124 m = storageutil.parsemeta(t)[0]
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125 # copy and copyrev occur in pairs. In rare cases due to bugs,
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126 # one can occur without the other.
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127 if m and "copy" in m and "copyrev" in m:
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128 return (m["copy"], revlog.bin(m["copyrev"]))
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129 return False
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130
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131 def size(self, rev):
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132 """return the size of a given revision"""
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133
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134 # for revisions with renames, we have to go the slow way
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135 node = self.node(rev)
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136 if self.renamed(node):
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137 return len(self.read(node))
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138 if self.iscensored(rev):
22597
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139 return 0
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140
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141 # XXX if self.read(node).startswith("\1\n"), this returns (size+4)
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142 return self._revlog.size(rev)
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143
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144 def cmp(self, node, text):
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145 """compare text with a given file revision
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146
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147 returns True if text is different than what is stored.
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148 """
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149
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150 t = text
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151 if text.startswith('\1\n'):
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152 t = '\1\n\1\n' + text
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153
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154 samehashes = not self._revlog.cmp(node, t)
11541
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diff changeset
155 if samehashes:
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156 return False
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157
22597
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158 # censored files compare against the empty file
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parents: 24117
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159 if self.iscensored(self.rev(node)):
22597
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diff changeset
160 return text != ''
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161
11541
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162 # renaming a file produces a different hash, even if the data
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163 # remains unchanged. Check if it's the case (slow):
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164 if self.renamed(node):
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165 t2 = self.read(node)
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166 return t2 != text
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167
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168 return True
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169
39847
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170 def verifyintegrity(self, state):
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parents: 39801
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171 return self._revlog.verifyintegrity(state)
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172
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diff changeset
173 def storageinfo(self, exclusivefiles=False, sharedfiles=False,
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174 revisionscount=False, trackedsize=False,
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diff changeset
175 storedsize=False):
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parents: 39872
diff changeset
176 return self._revlog.storageinfo(
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diff changeset
177 exclusivefiles=exclusivefiles, sharedfiles=sharedfiles,
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diff changeset
178 revisionscount=revisionscount, trackedsize=trackedsize,
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diff changeset
179 storedsize=storedsize)
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180
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parents: 39798
diff changeset
181 # TODO these aren't part of the interface and aren't internal methods.
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diff changeset
182 # Callers should be fixed to not use them.
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183
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184 # Used by bundlefilelog, unionfilelog.
37497
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185 @property
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186 def indexfile(self):
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diff changeset
187 return self._revlog.indexfile
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diff changeset
188
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diff changeset
189 @indexfile.setter
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diff changeset
190 def indexfile(self, value):
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diff changeset
191 self._revlog.indexfile = value
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diff changeset
192
39799
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diff changeset
193 # Used by repo upgrade.
37497
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diff changeset
194 def clone(self, tr, destrevlog, **kwargs):
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parents: 37443
diff changeset
195 if not isinstance(destrevlog, filelog):
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parents: 37443
diff changeset
196 raise error.ProgrammingError('expected filelog to clone()')
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diff changeset
197
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diff changeset
198 return self._revlog.clone(tr, destrevlog._revlog, **kwargs)
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199
39781
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200 class narrowfilelog(filelog):
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201 """Filelog variation to be used with narrow stores."""
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202
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diff changeset
203 def __init__(self, opener, path, narrowmatch):
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204 super(narrowfilelog, self).__init__(opener, path)
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205 self._narrowmatch = narrowmatch
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diff changeset
206
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diff changeset
207 def renamed(self, node):
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parents: 39310
diff changeset
208 res = super(narrowfilelog, self).renamed(node)
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diff changeset
209
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diff changeset
210 # Renames that come from outside the narrowspec are problematic
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diff changeset
211 # because we may lack the base text for the rename. This can result
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parents: 39310
diff changeset
212 # in code attempting to walk the ancestry or compute a diff
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parents: 39310
diff changeset
213 # encountering a missing revision. We address this by silently
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parents: 39310
diff changeset
214 # removing rename metadata if the source file is outside the
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parents: 39310
diff changeset
215 # narrow spec.
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parents: 39310
diff changeset
216 #
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diff changeset
217 # A better solution would be to see if the base revision is available,
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parents: 39310
diff changeset
218 # rather than assuming it isn't.
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
219 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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diff changeset
220 # An even better solution would be to teach all consumers of rename
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parents: 39310
diff changeset
221 # metadata that the base revision may not be available.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
222 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
223 # TODO consider better ways of doing this.
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parents: 39310
diff changeset
224 if res and not self._narrowmatch(res[0]):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
225 return None
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
226
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diff changeset
227 return res
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diff changeset
228
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diff changeset
229 def size(self, rev):
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diff changeset
230 # Because we have a custom renamed() that may lie, we need to call
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diff changeset
231 # the base renamed() to report accurate results.
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parents: 39310
diff changeset
232 node = self.node(rev)
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diff changeset
233 if super(narrowfilelog, self).renamed(node):
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parents: 39310
diff changeset
234 return len(self.read(node))
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
235 else:
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
236 return super(narrowfilelog, self).size(rev)
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parents: 39310
diff changeset
237
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diff changeset
238 def cmp(self, node, text):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
239 different = super(narrowfilelog, self).cmp(node, text)
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parents: 39310
diff changeset
240
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parents: 39310
diff changeset
241 # Because renamed() may lie, we may get false positives for
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
242 # different content. Check for this by comparing against the original
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
243 # renamed() implementation.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
244 if different:
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
245 if super(narrowfilelog, self).renamed(node):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
246 t2 = self.read(node)
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
247 return t2 != text
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parents: 39310
diff changeset
248
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parents: 39310
diff changeset
249 return different