Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/filelog.py @ 39865:d9b3cc3d5d07

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filelog: drop index attribute (API) The previous commit removed the last consumer of the "index" attribute on the file storage interface. The index is an extremely low-level data structure that is revlog specific and isn't appropriate to expose as part of a generic storage API. There may be a market for an efficient data structure to obtain metadata on every revision for a file. But if there is, it should be designed using e.g. named attributes for lookup instead of a list-like of 8-tuples. Let's drop the attribute from filelog and remove the attribute from the file storage interface. Differential Revision: https://phab.mercurial-scm.org/D4720
author Gregory Szorc <gregory.szorc@gmail.com>
date Thu, 20 Sep 2018 19:31:07 -0700
parents 32d3ed3023bb
children 5a9ab91e0a45
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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._revlog.filename = path
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28 # Used by changegroup generation.
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29 self._generaldelta = self._revlog._generaldelta
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30
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31 def __len__(self):
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32 return len(self._revlog)
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33
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34 def __iter__(self):
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35 return self._revlog.__iter__()
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36
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37 def revs(self, start=0, stop=None):
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38 return self._revlog.revs(start=start, stop=stop)
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39
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40 def parents(self, node):
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41 return self._revlog.parents(node)
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42
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43 def parentrevs(self, rev):
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44 return self._revlog.parentrevs(rev)
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45
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46 def rev(self, node):
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47 return self._revlog.rev(node)
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48
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49 def node(self, rev):
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50 return self._revlog.node(rev)
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51
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52 def lookup(self, node):
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53 return self._revlog.lookup(node)
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54
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55 def linkrev(self, rev):
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56 return self._revlog.linkrev(rev)
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57
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58 # Used by verify.
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59 def flags(self, rev):
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60 return self._revlog.flags(rev)
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61
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62 def commonancestorsheads(self, node1, node2):
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63 return self._revlog.commonancestorsheads(node1, node2)
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64
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65 # Used by dagop.blockdescendants().
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66 def descendants(self, revs):
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67 return self._revlog.descendants(revs)
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68
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69 def heads(self, start=None, stop=None):
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70 return self._revlog.heads(start, stop)
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71
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72 # Used by hgweb, children extension.
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73 def children(self, node):
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74 return self._revlog.children(node)
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75
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76 def deltaparent(self, rev):
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77 return self._revlog.deltaparent(rev)
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78
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79 def iscensored(self, rev):
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80 return self._revlog.iscensored(rev)
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81
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82 # Used by repo upgrade, verify.
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83 def rawsize(self, rev):
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84 return self._revlog.rawsize(rev)
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85
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86 # Might be unused.
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87 def checkhash(self, text, node, p1=None, p2=None, rev=None):
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88 return self._revlog.checkhash(text, node, p1=p1, p2=p2, rev=rev)
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89
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90 def revision(self, node, _df=None, raw=False):
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91 return self._revlog.revision(node, _df=_df, raw=raw)
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92
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93 def revdiff(self, rev1, rev2):
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94 return self._revlog.revdiff(rev1, rev2)
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95
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96 def emitrevisiondeltas(self, requests):
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97 return self._revlog.emitrevisiondeltas(requests)
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98
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99 def addrevision(self, revisiondata, transaction, linkrev, p1, p2,
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100 node=None, flags=revlog.REVIDX_DEFAULT_FLAGS,
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101 cachedelta=None):
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102 return self._revlog.addrevision(revisiondata, transaction, linkrev,
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103 p1, p2, node=node, flags=flags,
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104 cachedelta=cachedelta)
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105
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106 def addgroup(self, deltas, linkmapper, transaction, addrevisioncb=None):
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107 return self._revlog.addgroup(deltas, linkmapper, transaction,
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108 addrevisioncb=addrevisioncb)
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109
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110 def getstrippoint(self, minlink):
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111 return self._revlog.getstrippoint(minlink)
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112
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113 def strip(self, minlink, transaction):
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114 return self._revlog.strip(minlink, transaction)
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115
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116 def censorrevision(self, tr, node, tombstone=b''):
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117 return self._revlog.censorrevision(node, tombstone=tombstone)
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118
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119 def files(self):
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120 return self._revlog.files()
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121
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122 def read(self, node):
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123 t = self.revision(node)
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124 if not t.startswith('\1\n'):
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125 return t
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126 s = t.index('\1\n', 2)
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08a0f04b56bd many, many trivial check-code fixups
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diff changeset
127 return t[s + 2:]
360
10519e4cbd02 filelog: add metadata support
mpm@selenic.com
parents: 358
diff changeset
128
10519e4cbd02 filelog: add metadata support
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parents: 358
diff changeset
129 def add(self, text, meta, transaction, link, p1=None, p2=None):
686
d7d68d27ebe5 Reapply startswith() changes that got lost with stale edit
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parents: 681
diff changeset
130 if meta or text.startswith('\1\n'):
37442
0596d27457c6 revlog: move parsemeta() and packmeta() from filelog (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37441
diff changeset
131 text = revlog.packmeta(meta, text)
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
132 return self.addrevision(text, transaction, link, p1, p2)
9117c6561b0b Add back links from file revisions to changeset revisions
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parents:
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133
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mpm@selenic.com
parents: 1089
diff changeset
134 def renamed(self, node):
7634
14a4337a9b9b revlog: kill from-style imports
Matt Mackall <mpm@selenic.com>
parents: 7622
diff changeset
135 if self.parents(node)[0] != revlog.nullid:
1116
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mpm@selenic.com
parents: 1089
diff changeset
136 return False
13240
e5060aa22043 filelog: move metadata parsing to a helper function
Matt Mackall <mpm@selenic.com>
parents: 11541
diff changeset
137 t = self.revision(node)
37442
0596d27457c6 revlog: move parsemeta() and packmeta() from filelog (API)
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parents: 37441
diff changeset
138 m = revlog.parsemeta(t)[0]
37833
6614cac550ae filelog: don't crash on invalid copy metadata (issue5748)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37810
diff changeset
139 # copy and copyrev occur in pairs. In rare cases due to bugs,
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diff changeset
140 # one can occur without the other.
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parents: 37810
diff changeset
141 if m and "copy" in m and "copyrev" in m:
7634
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parents: 7622
diff changeset
142 return (m["copy"], revlog.bin(m["copyrev"]))
1116
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diff changeset
143 return False
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144
2898
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diff changeset
145 def size(self, rev):
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diff changeset
146 """return the size of a given revision"""
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147
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diff changeset
148 # for revisions with renames, we have to go the slow way
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diff changeset
149 node = self.node(rev)
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diff changeset
150 if self.renamed(node):
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parents: 2895
diff changeset
151 return len(self.read(node))
24118
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Mike Edgar <adgar@google.com>
parents: 24117
diff changeset
152 if self.iscensored(rev):
22597
58ec36686f0e filelog: censored files compare against empty data, have 0 size
Mike Edgar <adgar@google.com>
parents: 22596
diff changeset
153 return 0
2898
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154
11540
2370e270a29a filelog: test behaviour for data starting with "\1\n"
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11539
diff changeset
155 # XXX if self.read(node).startswith("\1\n"), this returns (size+4)
37497
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parents: 37443
diff changeset
156 return self._revlog.size(rev)
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157
2887
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158 def cmp(self, node, text):
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parents: 10706
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159 """compare text with a given file revision
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parents: 10706
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160
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161 returns True if text is different than what is stored.
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162 """
2887
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163
11541
ab9fa7a85dd9 filelog: cmp: don't read data if hashes are identical (issue2273)
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parents: 11540
diff changeset
164 t = text
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parents: 11540
diff changeset
165 if text.startswith('\1\n'):
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
166 t = '\1\n\1\n' + text
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diff changeset
167
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parents: 37443
diff changeset
168 samehashes = not self._revlog.cmp(node, t)
11541
ab9fa7a85dd9 filelog: cmp: don't read data if hashes are identical (issue2273)
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parents: 11540
diff changeset
169 if samehashes:
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parents: 11540
diff changeset
170 return False
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parents: 11540
diff changeset
171
22597
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parents: 22596
diff changeset
172 # censored files compare against the empty file
24118
76f6ae06ddf5 revlog: add "iscensored()" to revlog public API
Mike Edgar <adgar@google.com>
parents: 24117
diff changeset
173 if self.iscensored(self.rev(node)):
22597
58ec36686f0e filelog: censored files compare against empty data, have 0 size
Mike Edgar <adgar@google.com>
parents: 22596
diff changeset
174 return text != ''
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parents: 22596
diff changeset
175
11541
ab9fa7a85dd9 filelog: cmp: don't read data if hashes are identical (issue2273)
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parents: 11540
diff changeset
176 # renaming a file produces a different hash, even if the data
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
177 # remains unchanged. Check if it's the case (slow):
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11540
diff changeset
178 if self.renamed(node):
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parents: 2859
diff changeset
179 t2 = self.read(node)
2895
21631c2c09a5 filelog.cmp: return 0 for equality
Matt Mackall <mpm@selenic.com>
parents: 2890
diff changeset
180 return t2 != text
2887
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parents: 2859
diff changeset
181
11541
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diff changeset
182 return True
37497
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parents: 37443
diff changeset
183
39847
97986c9c69d3 verify: start to abstract file verification
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39801
diff changeset
184 def verifyintegrity(self, state):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39801
diff changeset
185 return self._revlog.verifyintegrity(state)
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parents: 39801
diff changeset
186
39799
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parents: 39798
diff changeset
187 # TODO these aren't part of the interface and aren't internal methods.
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parents: 39798
diff changeset
188 # Callers should be fixed to not use them.
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parents: 39798
diff changeset
189
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parents: 39798
diff changeset
190 # Used by bundlefilelog, unionfilelog.
37497
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parents: 37443
diff changeset
191 @property
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parents: 37443
diff changeset
192 def indexfile(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
193 return self._revlog.indexfile
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
194
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
195 @indexfile.setter
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parents: 37443
diff changeset
196 def indexfile(self, value):
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
197 self._revlog.indexfile = value
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parents: 37443
diff changeset
198
39860
62a532045e71 lfs: access revlog directly
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parents: 39849
diff changeset
199 # Used by repo upgrade.
37497
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
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parents: 37443
diff changeset
200 @property
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
201 def opener(self):
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
202 return self._revlog.opener
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
203
39799
76f92d208f7a filelog: record what's using attributes
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39798
diff changeset
204 # Used by repo upgrade.
37497
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
205 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
206 if not isinstance(destrevlog, filelog):
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
207 raise error.ProgrammingError('expected filelog to clone()')
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
208
1541e1a8e87d filelog: wrap revlog instead of inheriting it (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
209 return self._revlog.clone(tr, destrevlog._revlog, **kwargs)
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 37443
diff changeset
210
39781
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
211 class narrowfilelog(filelog):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
212 """Filelog variation to be used with narrow stores."""
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
213
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
214 def __init__(self, opener, path, narrowmatch):
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parents: 39310
diff changeset
215 super(narrowfilelog, self).__init__(opener, path)
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
216 self._narrowmatch = narrowmatch
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parents: 39310
diff changeset
217
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
218 def renamed(self, node):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
219 res = super(narrowfilelog, self).renamed(node)
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
220
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
221 # Renames that come from outside the narrowspec are problematic
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
222 # because we may lack the base text for the rename. This can result
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
223 # 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: 39310
diff changeset
224 # 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: 39310
diff changeset
225 # removing rename metadata if the source file is outside the
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
226 # narrow spec.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
227 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
228 # 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
229 # rather than assuming it isn't.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
230 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
231 # An even better solution would be to teach all consumers of rename
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
232 # 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
233 #
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
234 # TODO consider better ways of doing this.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
235 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: 39310
diff changeset
236 return None
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
237
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
238 return res
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
239
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
240 def size(self, rev):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
241 # Because we have a custom renamed() that may lie, we need to call
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
242 # the base renamed() to report accurate results.
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
243 node = self.node(rev)
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
244 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
245 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
246 else:
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
247 return super(narrowfilelog, self).size(rev)
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parents: 39310
diff changeset
248
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parents: 39310
diff changeset
249 def cmp(self, node, text):
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
250 different = super(narrowfilelog, self).cmp(node, text)
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parents: 39310
diff changeset
251
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
252 # Because renamed() may lie, we may get false positives for
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
253 # different content. Check for this by comparing against the original
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
254 # renamed() implementation.
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
255 if different:
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
256 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
257 t2 = self.read(node)
3e801ffd7269 filelog: custom filelog to be used with narrow repos
Gregory Szorc <gregory.szorc@gmail.com>
parents: 39310
diff changeset
258 return t2 != text
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parents: 39310
diff changeset
259
3e801ffd7269 filelog: custom filelog to be used with narrow repos
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parents: 39310
diff changeset
260 return different