Mercurial > hg
annotate mercurial/filelog.py @ 35997:24f05489377b
rebase: make "successors" a set in _computeobsoletenotrebased()
There's no apparent reason for this variable to be a list and this
avoids converting it to a set when needed.
author | Denis Laxalde <denis@laxalde.org> |
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date | Sat, 10 Feb 2018 19:33:19 +0100 |
parents | 07769a04bc66 |
children | a3202fa83aff |
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 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 |
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 import re |
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11 import struct |
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12 |
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13 from . import ( |
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14 error, |
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15 mdiff, |
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16 revlog, |
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17 ) |
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18 |
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19 _mdre = re.compile('\1\n') |
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20 def parsemeta(text): |
32124 | 21 """return (metadatadict, metadatasize)""" |
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22 # text can be buffer, so we can't use .startswith or .index |
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23 if text[:2] != '\1\n': |
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24 return None, None |
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25 s = _mdre.search(text, 2).start() |
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26 mtext = text[2:s] |
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27 meta = {} |
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28 for l in mtext.splitlines(): |
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29 k, v = l.split(": ", 1) |
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30 meta[k] = v |
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31 return meta, (s + 2) |
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32 |
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33 def packmeta(meta, text): |
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34 keys = sorted(meta) |
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35 metatext = "".join("%s: %s\n" % (k, meta[k]) for k in keys) |
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36 return "\1\n%s\1\n%s" % (metatext, text) |
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37 |
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38 def _censoredtext(text): |
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39 m, offs = parsemeta(text) |
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40 return m and "censored" in m |
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41 |
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42 class filelog(revlog.revlog): |
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43 def __init__(self, opener, path): |
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44 super(filelog, self).__init__(opener, |
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45 "/".join(("data", path + ".i"))) |
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46 # full name of the user visible file, relative to the repository root |
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47 self.filename = path |
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48 |
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49 def read(self, node): |
360 | 50 t = self.revision(node) |
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51 if not t.startswith('\1\n'): |
360 | 52 return t |
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53 s = t.index('\1\n', 2) |
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54 return t[s + 2:] |
360 | 55 |
56 def add(self, text, meta, transaction, link, p1=None, p2=None): | |
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57 if meta or text.startswith('\1\n'): |
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58 text = packmeta(meta, text) |
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59 return self.addrevision(text, transaction, link, p1, p2) |
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60 |
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62 if self.parents(node)[0] != revlog.nullid: |
1116 | 63 return False |
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64 t = self.revision(node) |
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65 m = parsemeta(t)[0] |
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66 if m and "copy" in m: |
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67 return (m["copy"], revlog.bin(m["copyrev"])) |
1116 | 68 return False |
69 | |
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70 def size(self, rev): |
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71 """return the size of a given revision""" |
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72 |
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73 # for revisions with renames, we have to go the slow way |
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74 node = self.node(rev) |
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75 if self.renamed(node): |
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76 return len(self.read(node)) |
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77 if self.iscensored(rev): |
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78 return 0 |
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79 |
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80 # XXX if self.read(node).startswith("\1\n"), this returns (size+4) |
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81 return super(filelog, self).size(rev) |
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82 |
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83 def cmp(self, node, text): |
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84 """compare text with a given file revision |
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85 |
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86 returns True if text is different than what is stored. |
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87 """ |
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88 |
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89 t = text |
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90 if text.startswith('\1\n'): |
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91 t = '\1\n\1\n' + text |
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92 |
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93 samehashes = not super(filelog, self).cmp(node, t) |
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94 if samehashes: |
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95 return False |
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96 |
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97 # censored files compare against the empty file |
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98 if self.iscensored(self.rev(node)): |
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99 return text != '' |
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100 |
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101 # renaming a file produces a different hash, even if the data |
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102 # remains unchanged. Check if it's the case (slow): |
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103 if self.renamed(node): |
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104 t2 = self.read(node) |
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105 return t2 != text |
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106 |
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107 return True |
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108 |
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109 def checkhash(self, text, node, p1=None, p2=None, rev=None): |
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110 try: |
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111 super(filelog, self).checkhash(text, node, p1=p1, p2=p2, rev=rev) |
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112 except error.RevlogError: |
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113 if _censoredtext(text): |
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114 raise error.CensoredNodeError(self.indexfile, node, text) |
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115 raise |
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116 |
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117 def iscensored(self, rev): |
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118 """Check if a file revision is censored.""" |
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119 return self.flags(rev) & revlog.REVIDX_ISCENSORED |
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120 |
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121 def _peek_iscensored(self, baserev, delta, flush): |
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122 """Quickly check if a delta produces a censored revision.""" |
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123 # Fragile heuristic: unless new file meta keys are added alphabetically |
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124 # preceding "censored", all censored revisions are prefixed by |
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125 # "\1\ncensored:". A delta producing such a censored revision must be a |
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126 # full-replacement delta, so we inspect the first and only patch in the |
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127 # delta for this prefix. |
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128 hlen = struct.calcsize(">lll") |
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129 if len(delta) <= hlen: |
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130 return False |
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131 |
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132 oldlen = self.rawsize(baserev) |
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133 newlen = len(delta) - hlen |
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134 if delta[:hlen] != mdiff.replacediffheader(oldlen, newlen): |
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135 return False |
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136 |
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137 add = "\1\ncensored:" |
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138 addlen = len(add) |
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139 return newlen >= addlen and delta[hlen:hlen + addlen] == add |