annotate mercurial/filelog.py @ 36309:94a1ff16f362

debuginstall: do not parse editor command in posix way on Windows An editor command is executed by a system shell, which is cmd.exe on Windows.
author Yuya Nishihara <yuya@tcha.org>
date Sat, 17 Feb 2018 13:13:04 +0900
parents 07769a04bc66
children a3202fa83aff
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 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):
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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):
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50 t = self.revision(node)
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51 if not t.startswith('\1\n'):
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52 return t
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53 s = t.index('\1\n', 2)
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54 return t[s + 2:]
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55
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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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61 def renamed(self, node):
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62 if self.parents(node)[0] != revlog.nullid:
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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"]))
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68 return False
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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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Mike Edgar <adgar@google.com>
parents: 24190
diff changeset
133 newlen = len(delta) - hlen
4bfe9f2d9761 revlog: addgroup checks if incoming deltas add censored revs, sets flag bit
Mike Edgar <adgar@google.com>
parents: 24190
diff changeset
134 if delta[:hlen] != mdiff.replacediffheader(oldlen, newlen):
4bfe9f2d9761 revlog: addgroup checks if incoming deltas add censored revs, sets flag bit
Mike Edgar <adgar@google.com>
parents: 24190
diff changeset
135 return False
4bfe9f2d9761 revlog: addgroup checks if incoming deltas add censored revs, sets flag bit
Mike Edgar <adgar@google.com>
parents: 24190
diff changeset
136
4bfe9f2d9761 revlog: addgroup checks if incoming deltas add censored revs, sets flag bit
Mike Edgar <adgar@google.com>
parents: 24190
diff changeset
137 add = "\1\ncensored:"
4bfe9f2d9761 revlog: addgroup checks if incoming deltas add censored revs, sets flag bit
Mike Edgar <adgar@google.com>
parents: 24190
diff changeset
138 addlen = len(add)
4bfe9f2d9761 revlog: addgroup checks if incoming deltas add censored revs, sets flag bit
Mike Edgar <adgar@google.com>
parents: 24190
diff changeset
139 return newlen >= addlen and delta[hlen:hlen + addlen] == add