Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/revlog.py @ 1559:59b3639df0a9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Convert all classes to new-style classes by deriving them from object.
author Eric Hopper <hopper@omnifarious.org>
date Fri, 18 Nov 2005 22:48:47 -0800
parents e793cbc8be00
children 14d1f1868bf6 11d12bd6e1dc
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1 """
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2 revlog.py - storage back-end for mercurial
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3
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4 This provides efficient delta storage with O(1) retrieve and append
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5 and O(changes) merge between branches
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6
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7 Copyright 2005 Matt Mackall <mpm@selenic.com>
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8
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9 This software may be used and distributed according to the terms
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10 of the GNU General Public License, incorporated herein by reference.
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11 """
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12
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13 from node import *
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14 from i18n import gettext as _
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15 from demandload import demandload
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16 demandload(globals(), "binascii errno heapq mdiff sha struct zlib")
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17
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18 def hash(text, p1, p2):
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19 """generate a hash from the given text and its parent hashes
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20
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21 This hash combines both the current file contents and its history
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22 in a manner that makes it easy to distinguish nodes with the same
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23 content in the revision graph.
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24 """
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25 l = [p1, p2]
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26 l.sort()
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27 s = sha.new(l[0])
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28 s.update(l[1])
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29 s.update(text)
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30 return s.digest()
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31
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32 def compress(text):
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33 """ generate a possibly-compressed representation of text """
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34 if not text: return ("", text)
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35 if len(text) < 44:
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36 if text[0] == '\0': return ("", text)
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37 return ('u', text)
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38 bin = zlib.compress(text)
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39 if len(bin) > len(text):
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40 if text[0] == '\0': return ("", text)
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41 return ('u', text)
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42 return ("", bin)
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43
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44 def decompress(bin):
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45 """ decompress the given input """
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46 if not bin: return bin
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47 t = bin[0]
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48 if t == '\0': return bin
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49 if t == 'x': return zlib.decompress(bin)
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50 if t == 'u': return bin[1:]
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51 raise RevlogError(_("unknown compression type %s") % t)
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52
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53 indexformat = ">4l20s20s20s"
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54
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55 class lazyparser(object):
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56 """
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57 this class avoids the need to parse the entirety of large indices
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58
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59 By default we parse and load 1000 entries at a time.
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60
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61 If no position is specified, we load the whole index, and replace
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62 the lazy objects in revlog with the underlying objects for
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63 efficiency in cases where we look at most of the nodes.
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64 """
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65 def __init__(self, data, revlog):
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66 self.data = data
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67 self.s = struct.calcsize(indexformat)
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68 self.l = len(data)/self.s
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69 self.index = [None] * self.l
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70 self.map = {nullid: -1}
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71 self.all = 0
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72 self.revlog = revlog
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73
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74 def trunc(self, pos):
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75 self.l = pos/self.s
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76
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77 def load(self, pos=None):
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78 if self.all: return
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79 if pos is not None:
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80 block = pos / 1000
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81 i = block * 1000
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82 end = min(self.l, i + 1000)
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83 else:
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84 self.all = 1
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85 i = 0
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86 end = self.l
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87 self.revlog.index = self.index
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88 self.revlog.nodemap = self.map
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89
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90 while i < end:
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91 d = self.data[i * self.s: (i + 1) * self.s]
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92 e = struct.unpack(indexformat, d)
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93 self.index[i] = e
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94 self.map[e[6]] = i
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95 i += 1
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96
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97 class lazyindex(object):
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98 """a lazy version of the index array"""
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99 def __init__(self, parser):
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100 self.p = parser
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101 def __len__(self):
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102 return len(self.p.index)
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103 def load(self, pos):
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104 if pos < 0:
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105 pos += len(self.p.index)
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106 self.p.load(pos)
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107 return self.p.index[pos]
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108 def __getitem__(self, pos):
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109 return self.p.index[pos] or self.load(pos)
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110 def __delitem__(self, pos):
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111 del self.p.index[pos]
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112 def append(self, e):
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113 self.p.index.append(e)
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114 def trunc(self, pos):
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115 self.p.trunc(pos)
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116
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117 class lazymap(object):
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118 """a lazy version of the node map"""
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119 def __init__(self, parser):
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120 self.p = parser
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121 def load(self, key):
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122 if self.p.all: return
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123 n = self.p.data.find(key)
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124 if n < 0:
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125 raise KeyError(key)
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126 pos = n / self.p.s
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127 self.p.load(pos)
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128 def __contains__(self, key):
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129 self.p.load()
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130 return key in self.p.map
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131 def __iter__(self):
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132 yield nullid
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133 for i in xrange(self.p.l):
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134 try:
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135 yield self.p.index[i][6]
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136 except:
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137 self.p.load(i)
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138 yield self.p.index[i][6]
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139 def __getitem__(self, key):
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140 try:
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141 return self.p.map[key]
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142 except KeyError:
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143 try:
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144 self.load(key)
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145 return self.p.map[key]
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146 except KeyError:
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147 raise KeyError("node " + hex(key))
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148 def __setitem__(self, key, val):
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149 self.p.map[key] = val
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150 def __delitem__(self, key):
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151 del self.p.map[key]
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152
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153 class RevlogError(Exception): pass
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154
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155 class revlog(object):
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156 """
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157 the underlying revision storage object
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158
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159 A revlog consists of two parts, an index and the revision data.
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160
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161 The index is a file with a fixed record size containing
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162 information on each revision, includings its nodeid (hash), the
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163 nodeids of its parents, the position and offset of its data within
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164 the data file, and the revision it's based on. Finally, each entry
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165 contains a linkrev entry that can serve as a pointer to external
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166 data.
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167
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168 The revision data itself is a linear collection of data chunks.
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169 Each chunk represents a revision and is usually represented as a
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170 delta against the previous chunk. To bound lookup time, runs of
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171 deltas are limited to about 2 times the length of the original
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172 version data. This makes retrieval of a version proportional to
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173 its size, or O(1) relative to the number of revisions.
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174
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175 Both pieces of the revlog are written to in an append-only
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176 fashion, which means we never need to rewrite a file to insert or
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177 remove data, and can use some simple techniques to avoid the need
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178 for locking while reading.
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179 """
0
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180 def __init__(self, opener, indexfile, datafile):
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181 """
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182 create a revlog object
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183
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184 opener is a function that abstracts the file opening operation
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185 and can be used to implement COW semantics or the like.
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186 """
0
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187 self.indexfile = indexfile
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188 self.datafile = datafile
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189 self.opener = opener
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190 self.cache = None
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191
0
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192 try:
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193 i = self.opener(self.indexfile).read()
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194 except IOError, inst:
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195 if inst.errno != errno.ENOENT:
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196 raise
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197 i = ""
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198
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199 if len(i) > 10000:
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200 # big index, let's parse it on demand
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201 parser = lazyparser(i, self)
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202 self.index = lazyindex(parser)
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203 self.nodemap = lazymap(parser)
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204 else:
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205 s = struct.calcsize(indexformat)
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206 l = len(i) / s
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207 self.index = [None] * l
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208 m = [None] * l
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209
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210 n = 0
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211 for f in xrange(0, len(i), s):
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212 # offset, size, base, linkrev, p1, p2, nodeid
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213 e = struct.unpack(indexformat, i[f:f + s])
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214 m[n] = (e[6], n)
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215 self.index[n] = e
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216 n += 1
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217
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218 self.nodemap = dict(m)
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219 self.nodemap[nullid] = -1
0
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220
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221 def tip(self): return self.node(len(self.index) - 1)
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222 def count(self): return len(self.index)
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223 def node(self, rev): return (rev < 0) and nullid or self.index[rev][6]
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224 def rev(self, node):
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225 try:
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226 return self.nodemap[node]
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227 except KeyError:
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228 raise RevlogError(_('%s: no node %s') % (self.indexfile, hex(node)))
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229 def linkrev(self, node): return self.index[self.rev(node)][3]
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230 def parents(self, node):
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231 if node == nullid: return (nullid, nullid)
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232 return self.index[self.rev(node)][4:6]
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233
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234 def start(self, rev): return self.index[rev][0]
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235 def length(self, rev): return self.index[rev][1]
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236 def end(self, rev): return self.start(rev) + self.length(rev)
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237 def base(self, rev): return self.index[rev][2]
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238
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239 def reachable(self, rev, stop=None):
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240 reachable = {}
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241 visit = [rev]
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242 reachable[rev] = 1
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243 if stop:
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244 stopn = self.rev(stop)
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245 else:
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246 stopn = 0
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247 while visit:
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248 n = visit.pop(0)
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249 if n == stop:
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250 continue
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251 if n == nullid:
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252 continue
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253 for p in self.parents(n):
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254 if self.rev(p) < stopn:
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255 continue
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256 if p not in reachable:
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257 reachable[p] = 1
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258 visit.append(p)
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259 return reachable
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260
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261 def nodesbetween(self, roots=None, heads=None):
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262 """Return a tuple containing three elements. Elements 1 and 2 contain
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263 a final list bases and heads after all the unreachable ones have been
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264 pruned. Element 0 contains a topologically sorted list of all
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265
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266 nodes that satisfy these constraints:
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267 1. All nodes must be descended from a node in roots (the nodes on
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268 roots are considered descended from themselves).
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269 2. All nodes must also be ancestors of a node in heads (the nodes in
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270 heads are considered to be their own ancestors).
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271
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272 If roots is unspecified, nullid is assumed as the only root.
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273 If heads is unspecified, it is taken to be the output of the
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274 heads method (i.e. a list of all nodes in the repository that
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275 have no children)."""
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276 nonodes = ([], [], [])
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277 if roots is not None:
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278 roots = list(roots)
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279 if not roots:
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280 return nonodes
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281 lowestrev = min([self.rev(n) for n in roots])
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282 else:
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283 roots = [nullid] # Everybody's a descendent of nullid
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284 lowestrev = -1
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285 if (lowestrev == -1) and (heads is None):
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286 # We want _all_ the nodes!
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287 return ([self.node(r) for r in xrange(0, self.count())],
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288 [nullid], list(self.heads()))
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289 if heads is None:
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290 # All nodes are ancestors, so the latest ancestor is the last
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291 # node.
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292 highestrev = self.count() - 1
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293 # Set ancestors to None to signal that every node is an ancestor.
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294 ancestors = None
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295 # Set heads to an empty dictionary for later discovery of heads
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296 heads = {}
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297 else:
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298 heads = list(heads)
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299 if not heads:
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300 return nonodes
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301 ancestors = {}
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302 # Start at the top and keep marking parents until we're done.
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303 nodestotag = heads[:]
1457
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
304 # Turn heads into a dictionary so we can remove 'fake' heads.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
305 # Also, later we will be using it to filter out the heads we can't
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
306 # find from roots.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
307 heads = dict.fromkeys(heads, 0)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
308 # Remember where the top was so we can use it as a limit later.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
309 highestrev = max([self.rev(n) for n in nodestotag])
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
310 while nodestotag:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
311 # grab a node to tag
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
312 n = nodestotag.pop()
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
313 # Never tag nullid
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
314 if n == nullid:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
315 continue
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
316 # A node's revision number represents its place in a
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
317 # topologically sorted list of nodes.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
318 r = self.rev(n)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
319 if r >= lowestrev:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
320 if n not in ancestors:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
321 # If we are possibly a descendent of one of the roots
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
322 # and we haven't already been marked as an ancestor
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
323 ancestors[n] = 1 # Mark as ancestor
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
324 # Add non-nullid parents to list of nodes to tag.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
325 nodestotag.extend([p for p in self.parents(n) if
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
326 p != nullid])
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
327 elif n in heads: # We've seen it before, is it a fake head?
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
328 # So it is, real heads should not be the ancestors of
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
329 # any other heads.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
330 heads.pop(n)
1459
106fdec8e1fb Fix small bug in nodesbetween if heads is [nullid].
Eric Hopper <hopper@omnifarious.org>
parents: 1458
diff changeset
331 if not ancestors:
1463
26e73acc0cdf Fix to handle case of empty list for roots or heads in nodesbetween.
Eric Hopper <hopper@omnifarious.org>
parents: 1459
diff changeset
332 return nonodes
1457
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
333 # Now that we have our set of ancestors, we want to remove any
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
334 # roots that are not ancestors.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
335
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
336 # If one of the roots was nullid, everything is included anyway.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
337 if lowestrev > -1:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
338 # But, since we weren't, let's recompute the lowest rev to not
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
339 # include roots that aren't ancestors.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
340
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
341 # Filter out roots that aren't ancestors of heads
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
342 roots = [n for n in roots if n in ancestors]
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
343 # Recompute the lowest revision
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
344 if roots:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
345 lowestrev = min([self.rev(n) for n in roots])
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
346 else:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
347 # No more roots? Return empty list
1463
26e73acc0cdf Fix to handle case of empty list for roots or heads in nodesbetween.
Eric Hopper <hopper@omnifarious.org>
parents: 1459
diff changeset
348 return nonodes
1457
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
349 else:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
350 # We are descending from nullid, and don't need to care about
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
351 # any other roots.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
352 lowestrev = -1
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
353 roots = [nullid]
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
354 # Transform our roots list into a 'set' (i.e. a dictionary where the
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
355 # values don't matter.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
356 descendents = dict.fromkeys(roots, 1)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
357 # Also, keep the original roots so we can filter out roots that aren't
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
358 # 'real' roots (i.e. are descended from other roots).
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
359 roots = descendents.copy()
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
360 # Our topologically sorted list of output nodes.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
361 orderedout = []
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
362 # Don't start at nullid since we don't want nullid in our output list,
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
363 # and if nullid shows up in descedents, empty parents will look like
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
364 # they're descendents.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
365 for r in xrange(max(lowestrev, 0), highestrev + 1):
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
366 n = self.node(r)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
367 isdescendent = False
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
368 if lowestrev == -1: # Everybody is a descendent of nullid
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
369 isdescendent = True
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
370 elif n in descendents:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
371 # n is already a descendent
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
372 isdescendent = True
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
373 # This check only needs to be done here because all the roots
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
374 # will start being marked is descendents before the loop.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
375 if n in roots:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
376 # If n was a root, check if it's a 'real' root.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
377 p = tuple(self.parents(n))
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
378 # If any of its parents are descendents, it's not a root.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
379 if (p[0] in descendents) or (p[1] in descendents):
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
380 roots.pop(n)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
381 else:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
382 p = tuple(self.parents(n))
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
383 # A node is a descendent if either of its parents are
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
384 # descendents. (We seeded the dependents list with the roots
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
385 # up there, remember?)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
386 if (p[0] in descendents) or (p[1] in descendents):
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
387 descendents[n] = 1
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
388 isdescendent = True
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
389 if isdescendent and ((ancestors is None) or (n in ancestors)):
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
390 # Only include nodes that are both descendents and ancestors.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
391 orderedout.append(n)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
392 if (ancestors is not None) and (n in heads):
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
393 # We're trying to figure out which heads are reachable
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
394 # from roots.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
395 # Mark this head as having been reached
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
396 heads[n] = 1
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
397 elif ancestors is None:
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
398 # Otherwise, we're trying to discover the heads.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
399 # Assume this is a head because if it isn't, the next step
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
400 # will eventually remove it.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
401 heads[n] = 1
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
402 # But, obviously its parents aren't.
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
403 for p in self.parents(n):
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
404 heads.pop(p, None)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
405 heads = [n for n in heads.iterkeys() if heads[n] != 0]
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
406 roots = roots.keys()
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
407 assert orderedout
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
408 assert roots
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
409 assert heads
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
410 return (orderedout, roots, heads)
518da3c3b6ce This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents: 1351
diff changeset
411
1551
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
412 def heads(self, start=None):
1550
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
413 """return the list of all nodes that have no children
1551
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
414
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
415 if start is specified, only heads that are descendants of
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
416 start will be returned
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
417
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
418 """
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
419 if start is None:
e793cbc8be00 Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1550
diff changeset
420 start = nullid
1550
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
421 reachable = {start: 1}
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
422 heads = {start: 1}
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
423 startrev = self.rev(start)
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
424
1550
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
425 for r in xrange(startrev + 1, self.count()):
221
2bfe525ef6ca Beginning of multi-head support
mpm@selenic.com
parents: 208
diff changeset
426 n = self.node(r)
2bfe525ef6ca Beginning of multi-head support
mpm@selenic.com
parents: 208
diff changeset
427 for pn in self.parents(n):
1550
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
428 if pn in reachable:
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
429 reachable[n] = 1
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
430 heads[n] = 1
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
431 if pn in heads:
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
432 del heads[pn]
ccb9b62de892 add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1535
diff changeset
433 return heads.keys()
370
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
434
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
435 def children(self, node):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
436 """find the children of a given node"""
370
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
437 c = []
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
438 p = self.rev(node)
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
439 for r in range(p + 1, self.count()):
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
440 n = self.node(r)
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
441 for pn in self.parents(n):
854
473c030d34a6 Fixed revlog.children.
Tristan Wibberley <tristan@wibberley.org>
parents: 655
diff changeset
442 if pn == node:
473c030d34a6 Fixed revlog.children.
Tristan Wibberley <tristan@wibberley.org>
parents: 655
diff changeset
443 c.append(n)
370
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
444 continue
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
445 elif pn == nullid:
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
446 continue
c90385d82aec revlog: add a children function
mpm@selenic.com
parents: 330
diff changeset
447 return c
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 484
diff changeset
448
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
449 def lookup(self, id):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
450 """locate a node based on revision number or subset of hex nodeid"""
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
451 try:
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
452 rev = int(id)
469
e205194ca7ef Various node id lookup tweaks
mpm@selenic.com
parents: 451
diff changeset
453 if str(rev) != id: raise ValueError
e205194ca7ef Various node id lookup tweaks
mpm@selenic.com
parents: 451
diff changeset
454 if rev < 0: rev = self.count() + rev
476
0a338d506268 Really _call_ method revlog.count in revlog.lookup()
Thomas Arendsen Hein <thomas@intevation.de>
parents: 469
diff changeset
455 if rev < 0 or rev >= self.count(): raise ValueError
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
456 return self.node(rev)
469
e205194ca7ef Various node id lookup tweaks
mpm@selenic.com
parents: 451
diff changeset
457 except (ValueError, OverflowError):
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
458 c = []
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
459 for n in self.nodemap:
469
e205194ca7ef Various node id lookup tweaks
mpm@selenic.com
parents: 451
diff changeset
460 if hex(n).startswith(id):
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
461 c.append(n)
1402
9d2c2e6b32b5 i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1400
diff changeset
462 if len(c) > 1: raise RevlogError(_("Ambiguous identifier"))
9d2c2e6b32b5 i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1400
diff changeset
463 if len(c) < 1: raise RevlogError(_("No match found"))
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
464 return c[0]
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 484
diff changeset
465
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
466 return None
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
467
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
468 def diff(self, a, b):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
469 """return a delta between two revisions"""
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
470 return mdiff.textdiff(a, b)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
471
73
ee1cbe841e01 Change revlog to use new patch code
mpm@selenic.com
parents: 71
diff changeset
472 def patches(self, t, pl):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
473 """apply a list of patches to a string"""
73
ee1cbe841e01 Change revlog to use new patch code
mpm@selenic.com
parents: 71
diff changeset
474 return mdiff.patches(t, pl)
ee1cbe841e01 Change revlog to use new patch code
mpm@selenic.com
parents: 71
diff changeset
475
119
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
476 def delta(self, node):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
477 """return or calculate a delta between a node and its predecessor"""
119
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
478 r = self.rev(node)
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
479 b = self.base(r)
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
480 if r == b:
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
481 return self.diff(self.revision(self.node(r - 1)),
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
482 self.revision(node))
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
483 else:
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
484 f = self.opener(self.datafile)
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
485 f.seek(self.start(r))
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
486 data = f.read(self.length(r))
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
487 return decompress(data)
c7a66f9752a4 Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents: 117
diff changeset
488
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
489 def revision(self, node):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
490 """return an uncompressed revision of a given"""
36
da28286bf6b7 Add smart node lookup by substring or by rev number
mpm@selenic.com
parents: 26
diff changeset
491 if node == nullid: return ""
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
492 if self.cache and self.cache[0] == node: return self.cache[2]
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
493
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
494 # look up what we need to read
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
495 text = None
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
496 rev = self.rev(node)
117
2ac722ad1a9d Make revision code slightly faster
mpm@selenic.com
parents: 116
diff changeset
497 start, length, base, link, p1, p2, node = self.index[rev]
2ac722ad1a9d Make revision code slightly faster
mpm@selenic.com
parents: 116
diff changeset
498 end = start + length
2ac722ad1a9d Make revision code slightly faster
mpm@selenic.com
parents: 116
diff changeset
499 if base != rev: start = self.start(base)
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
500
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
501 # do we have useful data cached?
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
502 if self.cache and self.cache[1] >= base and self.cache[1] < rev:
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
503 base = self.cache[1]
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
504 start = self.start(base + 1)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
505 text = self.cache[2]
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
506 last = 0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
507
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
508 f = self.opener(self.datafile)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
509 f.seek(start)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
510 data = f.read(end - start)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
511
651
08b65d66f3e7 Fix an odd revlog bug
Matt Mackall <mpm@selenic.com>
parents: 644
diff changeset
512 if text is None:
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
513 last = self.length(base)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
514 text = decompress(data[:last])
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
515
71
47c9a869adee Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents: 67
diff changeset
516 bins = []
64
b3e2ddff0159 Diff in subdirectories from Jake Edge
mpm@selenic.com
parents: 46
diff changeset
517 for r in xrange(base + 1, rev + 1):
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
518 s = self.length(r)
71
47c9a869adee Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents: 67
diff changeset
519 bins.append(decompress(data[last:last + s]))
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
520 last = last + s
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
521
71
47c9a869adee Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents: 67
diff changeset
522 text = mdiff.patches(text, bins)
47c9a869adee Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents: 67
diff changeset
523
26
9cf83bf9ad38 Simplify integrity checking
mpm@selenic.com
parents: 14
diff changeset
524 if node != hash(text, p1, p2):
1402
9d2c2e6b32b5 i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1400
diff changeset
525 raise RevlogError(_("integrity check failed on %s:%d")
98
3dde7c87e36d Add paranoia to diff code
mpm@selenic.com
parents: 97
diff changeset
526 % (self.datafile, rev))
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
527
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
528 self.cache = (node, rev, text)
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 484
diff changeset
529 return text
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
530
644
6ebe118280bd Performance enhancements for manifest.add()
mason@suse.com
parents: 547
diff changeset
531 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
532 """add a revision to the log
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
533
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
534 text - the revision data to add
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
535 transaction - the transaction object used for rollback
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
536 link - the linkrev data to add
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
537 p1, p2 - the parent nodeids of the revision
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
538 d - an optional precomputed delta
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
539 """
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
540 if text is None: text = ""
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
541 if p1 is None: p1 = self.tip()
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
542 if p2 is None: p2 = nullid
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
543
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
544 node = hash(text, p1, p2)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
545
301
5add718d92db revlog: allow duplicates
mpm@selenic.com
parents: 243
diff changeset
546 if node in self.nodemap:
5add718d92db revlog: allow duplicates
mpm@selenic.com
parents: 243
diff changeset
547 return node
5add718d92db revlog: allow duplicates
mpm@selenic.com
parents: 243
diff changeset
548
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
549 n = self.count()
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
550 t = n - 1
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
551
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
552 if n:
64
b3e2ddff0159 Diff in subdirectories from Jake Edge
mpm@selenic.com
parents: 46
diff changeset
553 base = self.base(t)
b3e2ddff0159 Diff in subdirectories from Jake Edge
mpm@selenic.com
parents: 46
diff changeset
554 start = self.start(base)
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
555 end = self.end(t)
644
6ebe118280bd Performance enhancements for manifest.add()
mason@suse.com
parents: 547
diff changeset
556 if not d:
6ebe118280bd Performance enhancements for manifest.add()
mason@suse.com
parents: 547
diff changeset
557 prev = self.revision(self.tip())
1533
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
558 d = self.diff(prev, str(text))
98
3dde7c87e36d Add paranoia to diff code
mpm@selenic.com
parents: 97
diff changeset
559 data = compress(d)
1533
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
560 l = len(data[1]) + len(data[0])
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
561 dist = end - start + l
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
562
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
563 # full versions are inserted when the needed deltas
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
564 # become comparable to the uncompressed text
64
b3e2ddff0159 Diff in subdirectories from Jake Edge
mpm@selenic.com
parents: 46
diff changeset
565 if not n or dist > len(text) * 2:
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
566 data = compress(text)
1533
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
567 l = len(data[1]) + len(data[0])
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
568 base = n
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
569 else:
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
570 base = self.base(t)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
571
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
572 offset = 0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
573 if t >= 0:
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
574 offset = self.end(t)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
575
1533
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
576 e = (offset, l, base, link, p1, p2, node)
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 484
diff changeset
577
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
578 self.index.append(e)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
579 self.nodemap[node] = n
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
580 entry = struct.pack(indexformat, *e)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
581
26
9cf83bf9ad38 Simplify integrity checking
mpm@selenic.com
parents: 14
diff changeset
582 transaction.add(self.datafile, e[0])
1533
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
583 f = self.opener(self.datafile, "a")
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
584 if data[0]:
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
585 f.write(data[0])
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
586 f.write(data[1])
41
df3f46253878 Fix truncate logic for indices again
mpm@selenic.com
parents: 36
diff changeset
587 transaction.add(self.indexfile, n * len(entry))
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
588 self.opener(self.indexfile, "a").write(entry)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
589
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
590 self.cache = (node, n, text)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
591 return node
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
592
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
593 def ancestor(self, a, b):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
594 """calculate the least common ancestor of nodes a and b"""
147
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
595 # calculate the distance of every node from root
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
596 dist = {nullid: 0}
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
597 for i in xrange(self.count()):
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
598 n = self.node(i)
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
599 p1, p2 = self.parents(n)
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
600 dist[n] = max(dist[p1], dist[p2]) + 1
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 484
diff changeset
601
147
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
602 # traverse ancestors in order of decreasing distance from root
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
603 def ancestors(node):
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
604 # we store negative distances because heap returns smallest member
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
605 h = [(-dist[node], node)]
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
606 seen = {}
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
607 earliest = self.count()
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
608 while h:
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
609 d, n = heapq.heappop(h)
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
610 if n not in seen:
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
611 seen[n] = 1
381
024ee0f8722a Ancestor algorithm fix
mpm@selenic.com
parents: 377
diff changeset
612 r = self.rev(n)
1351
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
613 yield (-d, n)
147
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
614 for p in self.parents(n):
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
615 heapq.heappush(h, (-dist[p], p))
45
f2b2d5daec30 Fix recursion depth trouble with ancestor algorithm
mpm@selenic.com
parents: 41
diff changeset
616
1351
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
617 def generations(node):
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
618 sg, s = None, {}
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
619 for g,n in ancestors(node):
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
620 if g != sg:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
621 if sg:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
622 yield sg, s
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
623 sg, s = g, {n:1}
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
624 else:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
625 s[n] = 1
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
626 yield sg, s
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
627
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
628 x = generations(a)
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
629 y = generations(b)
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
630 gx = x.next()
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
631 gy = y.next()
45
f2b2d5daec30 Fix recursion depth trouble with ancestor algorithm
mpm@selenic.com
parents: 41
diff changeset
632
147
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
633 # increment each ancestor list until it is closer to root than
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
634 # the other, or they match
b6d8ed7aeba0 A new ancestor algorithm
mpm@selenic.com
parents: 126
diff changeset
635 while 1:
1351
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
636 #print "ancestor gen %s %s" % (gx[0], gy[0])
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
637 if gx[0] == gy[0]:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
638 # find the intersection
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
639 i = [ n for n in gx[1] if n in gy[1] ]
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
640 if i:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
641 return i[0]
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
642 else:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
643 #print "next"
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
644 gy = y.next()
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
645 gx = x.next()
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
646 elif gx[0] < gy[0]:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
647 #print "next y"
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
648 gy = y.next()
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
649 else:
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
650 #print "next x"
0e2be889ccd7 Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents: 1325
diff changeset
651 gx = x.next()
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
652
1458
1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents: 1457
diff changeset
653 def group(self, nodelist, lookup, infocollect = None):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
654 """calculate a delta group
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
655
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
656 Given a list of changeset revs, return a set of deltas and
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
657 metadata corresponding to nodes. the first delta is
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
658 parent(nodes[0]) -> nodes[0] the receiver is guaranteed to
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
659 have this parent as it has all history before these
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
660 changesets. parent is parent[0]
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
661 """
1458
1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents: 1457
diff changeset
662 revs = [self.rev(n) for n in nodelist]
1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents: 1457
diff changeset
663 needed = dict.fromkeys(revs, 1)
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
664
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
665 # if we don't have any revisions touched by these changesets, bail
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
666 if not revs:
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
667 yield struct.pack(">l", 0)
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
668 return
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
669
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
670 # add the parent of the first rev
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
671 p = self.parents(self.node(revs[0]))[0]
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
672 revs.insert(0, self.rev(p))
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
673
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
674 # for each delta that isn't contiguous in the log, we need to
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
675 # reconstruct the base, reconstruct the result, and then
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
676 # calculate the delta. We also need to do this where we've
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
677 # stored a full version and not a delta
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
678 for i in xrange(0, len(revs) - 1):
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
679 a, b = revs[i], revs[i + 1]
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
680 if a + 1 != b or self.base(b) == b:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
681 for j in xrange(self.base(a), a + 1):
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
682 needed[j] = 1
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
683 for j in xrange(self.base(b), b + 1):
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
684 needed[j] = 1
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
685
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
686 # calculate spans to retrieve from datafile
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
687 needed = needed.keys()
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
688 needed.sort()
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
689 spans = []
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
690 oo = -1
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
691 ol = 0
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
692 for n in needed:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
693 if n < 0: continue
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
694 o = self.start(n)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
695 l = self.length(n)
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
696 if oo + ol == o: # can we merge with the previous?
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
697 nl = spans[-1][2]
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
698 nl.append((n, l))
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
699 ol += l
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
700 spans[-1] = (oo, ol, nl)
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
701 else:
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
702 oo = o
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
703 ol = l
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
704 spans.append((oo, ol, [(n, l)]))
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
705
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
706 # read spans in, divide up chunks
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
707 chunks = {}
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
708 for span in spans:
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
709 # we reopen the file for each span to make http happy for now
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
710 f = self.opener(self.datafile)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
711 f.seek(span[0])
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
712 data = f.read(span[1])
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
713
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
714 # divide up the span
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
715 pos = 0
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
716 for r, l in span[2]:
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
717 chunks[r] = decompress(data[pos: pos + l])
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
718 pos += l
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
719
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
720 # helper to reconstruct intermediate versions
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
721 def construct(text, base, rev):
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
722 bins = [chunks[r] for r in xrange(base + 1, rev + 1)]
71
47c9a869adee Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents: 67
diff changeset
723 return mdiff.patches(text, bins)
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
724
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
725 # build deltas
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
726 deltas = []
71
47c9a869adee Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents: 67
diff changeset
727 for d in xrange(0, len(revs) - 1):
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
728 a, b = revs[d], revs[d + 1]
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
729 n = self.node(b)
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
730
1458
1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents: 1457
diff changeset
731 if infocollect is not None:
1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents: 1457
diff changeset
732 infocollect(n)
1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents: 1457
diff changeset
733
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
734 # do we need to construct a new delta?
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
735 if a + 1 != b or self.base(b) == b:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
736 if a >= 0:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
737 base = self.base(a)
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
738 ta = chunks[self.base(a)]
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
739 ta = construct(ta, base, a)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
740 else:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
741 ta = ""
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 484
diff changeset
742
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
743 base = self.base(b)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
744 if a > base:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
745 base = a
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
746 tb = ta
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
747 else:
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
748 tb = chunks[self.base(b)]
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
749 tb = construct(tb, base, b)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
750 d = self.diff(ta, tb)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
751 else:
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
752 d = chunks[b]
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
753
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
754 p = self.parents(n)
1458
1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents: 1457
diff changeset
755 meta = n + p[0] + p[1] + lookup(n)
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
756 l = struct.pack(">l", len(meta) + len(d) + 4)
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
757 yield l
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
758 yield meta
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
759 yield d
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
760
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
761 yield struct.pack(">l", 0)
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
762
1062
6d5a62a549fa pep-0008 cleanup
benoit.boissinot@ens-lyon.fr
parents: 902
diff changeset
763 def addgroup(self, revs, linkmapper, transaction, unique=0):
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
764 """
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
765 add a delta group
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
766
1083
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
767 given a set of deltas, add them to the revision log. the
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
768 first delta is against its parent, which should be in our
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
769 log, the rest are against the previous delta.
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
770 """
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
771
30974cf73435 Add some docstrings to revlog.py
mpm@selenic.com
parents: 1074
diff changeset
772 #track the base of the current delta log
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
773 r = self.count()
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
774 t = r - 1
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
775 node = nullid
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 484
diff changeset
776
655
b3bba126b04a Fix out of range regression
Matt Mackall <mpm@selenic.com>
parents: 653
diff changeset
777 base = prev = -1
653
94cdd02792b5 Fix corruption resulting from skipping parts of a revision group
Matt Mackall <mpm@selenic.com>
parents: 651
diff changeset
778 start = end = measure = 0
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
779 if r:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
780 start = self.start(self.base(t))
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
781 end = self.end(t)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
782 measure = self.length(self.base(t))
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
783 base = self.base(t)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
784 prev = self.tip()
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
785
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
786 transaction.add(self.datafile, end)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
787 transaction.add(self.indexfile, r * struct.calcsize(indexformat))
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
788 dfh = self.opener(self.datafile, "a")
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
789 ifh = self.opener(self.indexfile, "a")
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
790
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
791 # loop through our set of deltas
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
792 chain = None
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
793 for chunk in revs:
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
794 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80])
94
7daef883134f Refactor merge code
mpm@selenic.com
parents: 86
diff changeset
795 link = linkmapper(cs)
77
bed15e766511 Fix bug in lazymap code
mpm@selenic.com
parents: 76
diff changeset
796 if node in self.nodemap:
224
ccbcc4d76f81 fix bad assumption about uniqueness of file versions
mpm@selenic.com
parents: 221
diff changeset
797 # this can happen if two branches make the same change
1218
cde6818e082a Add preliminary support for the bundle and unbundle commands
mpm@selenic.com
parents: 1214
diff changeset
798 # if unique:
1402
9d2c2e6b32b5 i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1400
diff changeset
799 # raise RevlogError(_("already have %s") % hex(node[:4]))
653
94cdd02792b5 Fix corruption resulting from skipping parts of a revision group
Matt Mackall <mpm@selenic.com>
parents: 651
diff changeset
800 chain = node
224
ccbcc4d76f81 fix bad assumption about uniqueness of file versions
mpm@selenic.com
parents: 221
diff changeset
801 continue
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
802 delta = chunk[80:]
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
803
1509
46a07392cf28 Add safety check for addgroup
Matt Mackall <mpm@selenic.com>
parents: 1494
diff changeset
804 for p in (p1, p2):
46a07392cf28 Add safety check for addgroup
Matt Mackall <mpm@selenic.com>
parents: 1494
diff changeset
805 if not p in self.nodemap:
46a07392cf28 Add safety check for addgroup
Matt Mackall <mpm@selenic.com>
parents: 1494
diff changeset
806 raise RevlogError(_("unknown parent %s") % short(p1))
46a07392cf28 Add safety check for addgroup
Matt Mackall <mpm@selenic.com>
parents: 1494
diff changeset
807
192
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
808 if not chain:
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
809 # retrieve the parent revision of the delta chain
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
810 chain = p1
5d8553352d2e Changes to network protocol
mpm@selenic.com
parents: 155
diff changeset
811 if not chain in self.nodemap:
1402
9d2c2e6b32b5 i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1400
diff changeset
812 raise RevlogError(_("unknown base %s") % short(chain[:4]))
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
813
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
814 # full versions are inserted when the needed deltas become
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
815 # comparable to the uncompressed text or when the previous
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
816 # version is not the one we have a delta against. We use
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
817 # the size of the previous full rev as a proxy for the
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
818 # current size.
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
819
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
820 if chain == prev:
1533
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
821 tempd = compress(delta)
3d11f81c9145 Reduce string duplication in compression code
mason@suse.com
parents: 1509
diff changeset
822 cdelta = tempd[0] + tempd[1]
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
823
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
824 if chain != prev or (end - start + len(cdelta)) > measure * 2:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
825 # flush our writes here so we can read it in revision
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
826 dfh.flush()
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
827 ifh.flush()
65
d40cc5aacc31 Fix up a bunch of bugs in the new merge code
mpm@selenic.com
parents: 64
diff changeset
828 text = self.revision(chain)
73
ee1cbe841e01 Change revlog to use new patch code
mpm@selenic.com
parents: 71
diff changeset
829 text = self.patches(text, [delta])
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
830 chk = self.addrevision(text, transaction, link, p1, p2)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
831 if chk != node:
1402
9d2c2e6b32b5 i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1400
diff changeset
832 raise RevlogError(_("consistency error adding group"))
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
833 measure = len(text)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
834 else:
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
835 e = (end, len(cdelta), self.base(t), link, p1, p2, node)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
836 self.index.append(e)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
837 self.nodemap[node] = r
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
838 dfh.write(cdelta)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
839 ifh.write(struct.pack(indexformat, *e))
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
840
65
d40cc5aacc31 Fix up a bunch of bugs in the new merge code
mpm@selenic.com
parents: 64
diff changeset
841 t, r, chain, prev = r, r + 1, node, node
46
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
842 start = self.start(self.base(t))
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
843 end = self.end(t)
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
844
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
845 dfh.close()
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
846 ifh.close()
93e868fa0db8 Add changegroup support
mpm@selenic.com
parents: 45
diff changeset
847 return node
1493
1a216cb4ee64 verify: add check for mismatch of index and data length
Matt Mackall <mpm@selenic.com>
parents: 1469
diff changeset
848
1535
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
849 def strip(self, rev, minlink):
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
850 if self.count() == 0 or rev >= self.count():
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
851 return
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
852
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
853 # When stripping away a revision, we need to make sure it
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
854 # does not actually belong to an older changeset.
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
855 # The minlink parameter defines the oldest revision
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
856 # we're allowed to strip away.
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
857 while minlink > self.index[rev][3]:
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
858 rev += 1
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
859 if rev >= self.count():
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
860 return
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
861
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
862 # first truncate the files on disk
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
863 end = self.start(rev)
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
864 self.opener(self.datafile, "a").truncate(end)
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
865 end = rev * struct.calcsize(indexformat)
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
866 self.opener(self.indexfile, "a").truncate(end)
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
867
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
868 # then reset internal state in memory to forget those revisions
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
869 self.cache = None
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
870 for p in self.index[rev:]:
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
871 del self.nodemap[p[6]]
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
872 del self.index[rev:]
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
873
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
874 # truncating the lazyindex also truncates the lazymap.
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
875 if isinstance(self.index, lazyindex):
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
876 self.index.trunc(end)
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
877
7ae0ce7a3dc4 Add revlog.strip to truncate away revisions.
mason@suse.com
parents: 1533
diff changeset
878
1493
1a216cb4ee64 verify: add check for mismatch of index and data length
Matt Mackall <mpm@selenic.com>
parents: 1469
diff changeset
879 def checksize(self):
1a216cb4ee64 verify: add check for mismatch of index and data length
Matt Mackall <mpm@selenic.com>
parents: 1469
diff changeset
880 expected = 0
1a216cb4ee64 verify: add check for mismatch of index and data length
Matt Mackall <mpm@selenic.com>
parents: 1469
diff changeset
881 if self.count():
1a216cb4ee64 verify: add check for mismatch of index and data length
Matt Mackall <mpm@selenic.com>
parents: 1469
diff changeset
882 expected = self.end(self.count() - 1)
1494
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
883 try:
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
884 f = self.opener(self.datafile)
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
885 f.seek(0, 2)
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
886 actual = f.tell()
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
887 return expected - actual
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
888 except IOError, inst:
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
889 if inst.errno == errno.ENOENT:
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
890 return 0
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
891 raise
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
892
249ca10d37f4 Handle empty logs in repo.checksize
Matt Mackall <mpm@selenic.com>
parents: 1493
diff changeset
893