Mercurial > hg
annotate mercurial/filelog.py @ 25755:72d395e399c1
cmdutil: remove useless dirstate.normallookup() invocation in revert()
Explicit 'dirstate.normallookup()' invocation in 'revert()' is useless
now, because previous patch fixed the relevant issue by writing
in-memory dirstate changes out at the end of dirty check.
'dirstate.normallookup()' invocation was introduced by 21b33f0460e0 to
avoid occasional test failure (see issue4583 for detail). This is
partial backout of it (added tests are still left).
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Wed, 08 Jul 2015 17:01:09 +0900 |
parents | 4bfe9f2d9761 |
children | 34bd1a5eef5b |
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 import error, mdiff, revlog |
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9 import re, struct |
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10 |
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11 _mdre = re.compile('\1\n') |
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12 def parsemeta(text): |
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13 """return (metadatadict, keylist, metadatasize)""" |
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14 # text can be buffer, so we can't use .startswith or .index |
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15 if text[:2] != '\1\n': |
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16 return None, None |
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17 s = _mdre.search(text, 2).start() |
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18 mtext = text[2:s] |
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19 meta = {} |
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20 for l in mtext.splitlines(): |
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21 k, v = l.split(": ", 1) |
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22 meta[k] = v |
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23 return meta, (s + 2) |
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24 |
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25 def packmeta(meta, text): |
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26 keys = sorted(meta.iterkeys()) |
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27 metatext = "".join("%s: %s\n" % (k, meta[k]) for k in keys) |
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28 return "\1\n%s\1\n%s" % (metatext, text) |
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29 |
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30 def _censoredtext(text): |
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31 m, offs = parsemeta(text) |
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32 return m and "censored" in m |
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33 |
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34 class filelog(revlog.revlog): |
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35 def __init__(self, opener, path): |
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36 super(filelog, self).__init__(opener, |
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37 "/".join(("data", path + ".i"))) |
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38 |
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39 def read(self, node): |
360 | 40 t = self.revision(node) |
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41 if not t.startswith('\1\n'): |
360 | 42 return t |
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43 s = t.index('\1\n', 2) |
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44 return t[s + 2:] |
360 | 45 |
46 def add(self, text, meta, transaction, link, p1=None, p2=None): | |
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47 if meta or text.startswith('\1\n'): |
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48 text = packmeta(meta, text) |
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49 return self.addrevision(text, transaction, link, p1, p2) |
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50 |
1116 | 51 def renamed(self, node): |
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52 if self.parents(node)[0] != revlog.nullid: |
1116 | 53 return False |
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54 t = self.revision(node) |
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55 m = parsemeta(t)[0] |
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56 if m and "copy" in m: |
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57 return (m["copy"], revlog.bin(m["copyrev"])) |
1116 | 58 return False |
59 | |
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60 def size(self, rev): |
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61 """return the size of a given revision""" |
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62 |
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63 # for revisions with renames, we have to go the slow way |
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64 node = self.node(rev) |
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65 if self.renamed(node): |
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66 return len(self.read(node)) |
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67 if self.iscensored(rev): |
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68 return 0 |
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69 |
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70 # XXX if self.read(node).startswith("\1\n"), this returns (size+4) |
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71 return super(filelog, self).size(rev) |
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72 |
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73 def cmp(self, node, text): |
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74 """compare text with a given file revision |
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75 |
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76 returns True if text is different than what is stored. |
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77 """ |
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78 |
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79 t = text |
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80 if text.startswith('\1\n'): |
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81 t = '\1\n\1\n' + text |
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82 |
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83 samehashes = not super(filelog, self).cmp(node, t) |
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84 if samehashes: |
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85 return False |
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86 |
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87 # censored files compare against the empty file |
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88 if self.iscensored(self.rev(node)): |
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89 return text != '' |
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90 |
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91 # renaming a file produces a different hash, even if the data |
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92 # remains unchanged. Check if it's the case (slow): |
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93 if self.renamed(node): |
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94 t2 = self.read(node) |
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95 return t2 != text |
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96 |
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97 return True |
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98 |
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99 def checkhash(self, text, p1, p2, node, rev=None): |
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100 try: |
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101 super(filelog, self).checkhash(text, p1, p2, node, rev=rev) |
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102 except error.RevlogError: |
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103 if _censoredtext(text): |
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104 raise error.CensoredNodeError(self.indexfile, node, text) |
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105 raise |
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106 |
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107 def iscensored(self, rev): |
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108 """Check if a file revision is censored.""" |
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109 return self.flags(rev) & revlog.REVIDX_ISCENSORED |
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110 |
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111 def _peek_iscensored(self, baserev, delta, flush): |
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112 """Quickly check if a delta produces a censored revision.""" |
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113 # Fragile heuristic: unless new file meta keys are added alphabetically |
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114 # preceding "censored", all censored revisions are prefixed by |
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115 # "\1\ncensored:". A delta producing such a censored revision must be a |
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116 # full-replacement delta, so we inspect the first and only patch in the |
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117 # delta for this prefix. |
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118 hlen = struct.calcsize(">lll") |
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119 if len(delta) <= hlen: |
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120 return False |
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121 |
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122 oldlen = self.rawsize(baserev) |
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123 newlen = len(delta) - hlen |
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124 if delta[:hlen] != mdiff.replacediffheader(oldlen, newlen): |
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125 return False |
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126 |
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127 add = "\1\ncensored:" |
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128 addlen = len(add) |
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129 return newlen >= addlen and delta[hlen:hlen + addlen] == add |