Mercurial > public > mercurial-scm > hg

annotate mercurial/filelog.py @ 39783:76f92d208f7a

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filelog: record what's using attributes filelog and the file storage interface have some attributes that ideally shouldn't be there. This commit annotates some of those attributes with their users so we know where to look when it comes time to removing them. This exercise exposed a theme: many attributes are used by LFS, repo upgrade, verify, and special repo types (like bundlerepo). That points to missing abstractions on file storage to facilitate these special needs. Differential Revision: https://phab.mercurial-scm.org/D4661
author Gregory Szorc <gregory.szorc@gmail.com>
date Tue, 18 Sep 2018 18:56:02 -0700
parents 03bedf1d09fc
children 979e9f124caa
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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 )
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18
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19 @interfaceutil.implementer(repository.ifilestorage)
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20 class filelog(object):
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21 def __init__(self, opener, path):
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22 self._revlog = revlog.revlog(opener,
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23 '/'.join(('data', path + '.i')),
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24 censorable=True)
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25 # Full name of the user visible file, relative to the repository root.
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26 # Used by LFS.
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27 self.filename = path
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28 # Used by repo upgrade.
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29 self.index = self._revlog.index
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30 # Used by verify.
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31 self.version = self._revlog.version
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32 # Used by changegroup generation.
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33 self._generaldelta = self._revlog._generaldelta
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34
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35 def __len__(self):
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36 return len(self._revlog)
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37
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38 def __iter__(self):
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39 return self._revlog.__iter__()
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40
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41 def revs(self, start=0, stop=None):
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42 return self._revlog.revs(start=start, stop=stop)
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43
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44 def parents(self, node):
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45 return self._revlog.parents(node)
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46
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47 def parentrevs(self, rev):
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48 return self._revlog.parentrevs(rev)
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49
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50 def rev(self, node):
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51 return self._revlog.rev(node)
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52
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53 def node(self, rev):
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54 return self._revlog.node(rev)
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55
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56 def lookup(self, node):
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57 return self._revlog.lookup(node)
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58
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59 def linkrev(self, rev):
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60 return self._revlog.linkrev(rev)
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61
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62 # Used by LFS, verify.
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63 def flags(self, rev):
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64 return self._revlog.flags(rev)
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65
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66 def commonancestorsheads(self, node1, node2):
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67 return self._revlog.commonancestorsheads(node1, node2)
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68
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69 # Used by dagop.blockdescendants().
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70 def descendants(self, revs):
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71 return self._revlog.descendants(revs)
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72
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73 # Used by hgweb.
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74 def headrevs(self):
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75 return self._revlog.headrevs()
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76
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77 def heads(self, start=None, stop=None):
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78 return self._revlog.heads(start, stop)
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79
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80 # Used by hgweb, children extension.
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81 def children(self, node):
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82 return self._revlog.children(node)
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83
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84 def deltaparent(self, rev):
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85 return self._revlog.deltaparent(rev)
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86
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87 def iscensored(self, rev):
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88 return self._revlog.iscensored(rev)
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89
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90 # Used by verify.
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91 def rawsize(self, rev):
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92 return self._revlog.rawsize(rev)
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93
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94 # Might be unused.
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95 def checkhash(self, text, node, p1=None, p2=None, rev=None):
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96 return self._revlog.checkhash(text, node, p1=p1, p2=p2, rev=rev)
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97
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98 def revision(self, node, _df=None, raw=False):
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99 return self._revlog.revision(node, _df=_df, raw=raw)
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100
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101 def revdiff(self, rev1, rev2):
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102 return self._revlog.revdiff(rev1, rev2)
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103
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104 def emitrevisiondeltas(self, requests):
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105 return self._revlog.emitrevisiondeltas(requests)
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106
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107 def addrevision(self, revisiondata, transaction, linkrev, p1, p2,
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108 node=None, flags=revlog.REVIDX_DEFAULT_FLAGS,
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109 cachedelta=None):
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110 return self._revlog.addrevision(revisiondata, transaction, linkrev,
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111 p1, p2, node=node, flags=flags,
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112 cachedelta=cachedelta)
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113
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114 def addgroup(self, deltas, linkmapper, transaction, addrevisioncb=None):
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115 return self._revlog.addgroup(deltas, linkmapper, transaction,
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116 addrevisioncb=addrevisioncb)
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117
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118 def getstrippoint(self, minlink):
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119 return self._revlog.getstrippoint(minlink)
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120
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121 def strip(self, minlink, transaction):
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122 return self._revlog.strip(minlink, transaction)
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123
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124 def censorrevision(self, tr, node, tombstone=b''):
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125 return self._revlog.censorrevision(node, tombstone=tombstone)
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126
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127 def files(self):
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128 return self._revlog.files()
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129
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130 # Used by verify.
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131 def checksize(self):
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132 return self._revlog.checksize()
0
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133
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diff changeset
134 def read(self, node):
360
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parents: 358
diff changeset
135 t = self.revision(node)
686
d7d68d27ebe5 Reapply startswith() changes that got lost with stale edit
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parents: 681
diff changeset
136 if not t.startswith('\1\n'):
360
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diff changeset
137 return t
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Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2470
diff changeset
138 s = t.index('\1\n', 2)
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parents: 10263
diff changeset
139 return t[s + 2:]
360
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140
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parents: 358
diff changeset
141 def add(self, text, meta, transaction, link, p1=None, p2=None):
686
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parents: 681
diff changeset
142 if meta or text.startswith('\1\n'):
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parents: 37441
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143 text = revlog.packmeta(meta, text)
0
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144 return self.addrevision(text, transaction, link, p1, p2)
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145
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146 def renamed(self, node):
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parents: 7622
diff changeset
147 if self.parents(node)[0] != revlog.nullid:
1116
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parents: 1089
diff changeset
148 return False
13240
e5060aa22043 filelog: move metadata parsing to a helper function
Matt Mackall <mpm@selenic.com>
parents: 11541
diff changeset
149 t = self.revision(node)
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parents: 37441
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150 m = revlog.parsemeta(t)[0]
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parents: 37810
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151 # copy and copyrev occur in pairs. In rare cases due to bugs,
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parents: 37810
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152 # one can occur without the other.
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parents: 37810
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153 if m and "copy" in m and "copyrev" in m:
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parents: 7622
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154 return (m["copy"], revlog.bin(m["copyrev"]))
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155 return False
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156
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157 def size(self, rev):
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158 """return the size of a given revision"""
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159
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160 # for revisions with renames, we have to go the slow way
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Matt Mackall <mpm@selenic.com>
parents: 2895
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161 node = self.node(rev)
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parents: 2895
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162 if self.renamed(node):
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parents: 2895
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163 return len(self.read(node))
24118
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Mike Edgar <adgar@google.com>
parents: 24117
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164 if self.iscensored(rev):
22597
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Mike Edgar <adgar@google.com>
parents: 22596
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165 return 0
2898
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166
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2370e270a29a filelog: test behaviour for data starting with "\1\n"
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11539
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167 # XXX if self.read(node).startswith("\1\n"), this returns (size+4)
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168 return self._revlog.size(rev)
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169
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170 def cmp(self, node, text):
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 10706
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171 """compare text with a given file revision
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 10706
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172
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 10706
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173 returns True if text is different than what is stored.
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 10706
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174 """
2887
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175
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
176 t = text
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parents: 11540
diff changeset
177 if text.startswith('\1\n'):
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
178 t = '\1\n\1\n' + text
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179
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180 samehashes = not self._revlog.cmp(node, t)
11541
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
181 if samehashes:
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
182 return False
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
183
22597
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Mike Edgar <adgar@google.com>
parents: 22596
diff changeset
184 # censored files compare against the empty file
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Mike Edgar <adgar@google.com>
parents: 24117
diff changeset
185 if self.iscensored(self.rev(node)):
22597
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Mike Edgar <adgar@google.com>
parents: 22596
diff changeset
186 return text != ''
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Mike Edgar <adgar@google.com>
parents: 22596
diff changeset
187
11541
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parents: 11540
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188 # renaming a file produces a different hash, even if the data
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
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189 # remains unchanged. Check if it's the case (slow):
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Nicolas Dumazet <nicdumz.commits@gmail.com>
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190 if self.renamed(node):
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parents: 2859
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191 t2 = self.read(node)
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21631c2c09a5 filelog.cmp: return 0 for equality
Matt Mackall <mpm@selenic.com>
parents: 2890
diff changeset
192 return t2 != text
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193
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194 return True
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195
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196 # TODO these aren't part of the interface and aren't internal methods.
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197 # Callers should be fixed to not use them.
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198
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199 # Used by LFS.
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diff changeset
200 @property
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
201 def filename(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
202 return self._revlog.filename
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
203
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
204 @filename.setter
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
205 def filename(self, value):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
206 self._revlog.filename = value
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207
39783
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diff changeset
208 # Used by bundlefilelog, unionfilelog.
37497
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parents: 37443
diff changeset
209 @property
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
210 def indexfile(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
211 return self._revlog.indexfile
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
212
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
213 @indexfile.setter
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
214 def indexfile(self, value):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
215 self._revlog.indexfile = value
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parents: 37443
diff changeset
216
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diff changeset
217 # Used by LFS, repo upgrade.
37497
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
218 @property
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
219 def opener(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
220 return self._revlog.opener
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
221
39783
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parents: 39782
diff changeset
222 # Used by repo upgrade.
37497
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
223 def clone(self, tr, destrevlog, **kwargs):
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
224 if not isinstance(destrevlog, filelog):
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
225 raise error.ProgrammingError('expected filelog to clone()')
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
226
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
227 return self._revlog.clone(tr, destrevlog._revlog, **kwargs)
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
228
39765
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diff changeset
229 class narrowfilelog(filelog):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
230 """Filelog variation to be used with narrow stores."""
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231
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diff changeset
232 def __init__(self, opener, path, narrowmatch):
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parents: 39283
diff changeset
233 super(narrowfilelog, self).__init__(opener, path)
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parents: 39283
diff changeset
234 self._narrowmatch = narrowmatch
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parents: 39283
diff changeset
235
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39283
diff changeset
236 def renamed(self, node):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
237 res = super(narrowfilelog, self).renamed(node)
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parents: 39283
diff changeset
238
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parents: 39283
diff changeset
239 # Renames that come from outside the narrowspec are problematic
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
240 # because we may lack the base text for the rename. This can result
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
241 # in code attempting to walk the ancestry or compute a diff
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
242 # encountering a missing revision. We address this by silently
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
243 # removing rename metadata if the source file is outside the
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
244 # narrow spec.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
245 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
246 # 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: 39283
diff changeset
247 # rather than assuming it isn't.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
248 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
249 # An even better solution would be to teach all consumers of rename
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
250 # 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: 39283
diff changeset
251 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39283
diff changeset
252 # TODO consider better ways of doing this.
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
253 if res and not self._narrowmatch(res[0]):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
254 return None
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parents: 39283
diff changeset
255
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
256 return res
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
257
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
258 def size(self, rev):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
diff changeset
259 # Because we have a custom renamed() that may lie, we need to call
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39283
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260 # the base renamed() to report accurate results.
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261 node = self.node(rev)
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262 if super(narrowfilelog, self).renamed(node):
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263 return len(self.read(node))
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264 else:
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265 return super(narrowfilelog, self).size(rev)
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266
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267 def cmp(self, node, text):
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268 different = super(narrowfilelog, self).cmp(node, text)
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269
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270 # Because renamed() may lie, we may get false positives for
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271 # different content. Check for this by comparing against the original
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272 # renamed() implementation.
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273 if different:
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274 if super(narrowfilelog, self).renamed(node):
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275 t2 = self.read(node)
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276 return t2 != text
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277
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278 return different