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1 # revlog.py - storage back-end for mercurial
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2 #
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2, incorporated herein by reference.
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7
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8 """Storage back-end for Mercurial.
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9
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10 This provides efficient delta storage with O(1) retrieve and append
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11 and O(changes) merge between branches.
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12 """
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13
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14 # import stuff from node for others to import from revlog
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15 from node import bin, hex, nullid, nullrev, short #@UnusedImport
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16 from i18n import _
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17 import changegroup, ancestor, mdiff, parsers, error, util
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18 import struct, zlib, errno
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19
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20 _pack = struct.pack
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21 _unpack = struct.unpack
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22 _compress = zlib.compress
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23 _decompress = zlib.decompress
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24 _sha = util.sha1
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25
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26 # revlog flags
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27 REVLOGV0 = 0
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28 REVLOGNG = 1
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29 REVLOGNGINLINEDATA = (1 << 16)
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30 REVLOG_DEFAULT_FLAGS = REVLOGNGINLINEDATA
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31 REVLOG_DEFAULT_FORMAT = REVLOGNG
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32 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS
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33
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34 _prereadsize = 1048576
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35
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36 RevlogError = error.RevlogError
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37 LookupError = error.LookupError
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38
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39 def getoffset(q):
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40 return int(q >> 16)
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41
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42 def gettype(q):
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43 return int(q & 0xFFFF)
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44
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45 def offset_type(offset, type):
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46 return long(long(offset) << 16 | type)
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47
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48 nullhash = _sha(nullid)
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49
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50 def hash(text, p1, p2):
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51 """generate a hash from the given text and its parent hashes
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52
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53 This hash combines both the current file contents and its history
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54 in a manner that makes it easy to distinguish nodes with the same
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55 content in the revision graph.
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56 """
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57 # As of now, if one of the parent node is null, p2 is null
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58 if p2 == nullid:
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59 # deep copy of a hash is faster than creating one
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60 s = nullhash.copy()
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61 s.update(p1)
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62 else:
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63 # none of the parent nodes are nullid
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64 l = [p1, p2]
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65 l.sort()
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66 s = _sha(l[0])
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67 s.update(l[1])
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68 s.update(text)
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69 return s.digest()
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70
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71 def compress(text):
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72 """ generate a possibly-compressed representation of text """
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73 if not text:
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74 return ("", text)
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75 l = len(text)
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76 bin = None
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77 if l < 44:
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78 pass
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79 elif l > 1000000:
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80 # zlib makes an internal copy, thus doubling memory usage for
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81 # large files, so lets do this in pieces
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82 z = zlib.compressobj()
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83 p = []
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84 pos = 0
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85 while pos < l:
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86 pos2 = pos + 2**20
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87 p.append(z.compress(text[pos:pos2]))
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88 pos = pos2
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89 p.append(z.flush())
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90 if sum(map(len, p)) < l:
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91 bin = "".join(p)
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92 else:
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93 bin = _compress(text)
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94 if bin is None or len(bin) > l:
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95 if text[0] == '\0':
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96 return ("", text)
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97 return ('u', text)
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98 return ("", bin)
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99
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100 def decompress(bin):
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101 """ decompress the given input """
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102 if not bin:
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103 return bin
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104 t = bin[0]
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105 if t == '\0':
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106 return bin
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107 if t == 'x':
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108 return _decompress(bin)
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109 if t == 'u':
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110 return bin[1:]
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111 raise RevlogError(_("unknown compression type %r") % t)
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112
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113 class lazyparser(object):
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114 """
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115 this class avoids the need to parse the entirety of large indices
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116 """
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117
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118 # lazyparser is not safe to use on windows if win32 extensions not
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119 # available. it keeps file handle open, which make it not possible
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120 # to break hardlinks on local cloned repos.
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121
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122 def __init__(self, dataf):
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123 try:
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124 size = util.fstat(dataf).st_size
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125 except AttributeError:
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126 size = 0
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127 self.dataf = dataf
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128 self.s = struct.calcsize(indexformatng)
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129 self.datasize = size
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130 self.l = size/self.s
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131 self.index = [None] * self.l
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132 self.map = {nullid: nullrev}
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133 self.allmap = 0
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134 self.all = 0
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135 self.mapfind_count = 0
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136
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137 def loadmap(self):
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138 """
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139 during a commit, we need to make sure the rev being added is
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140 not a duplicate. This requires loading the entire index,
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141 which is fairly slow. loadmap can load up just the node map,
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142 which takes much less time.
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143 """
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144 if self.allmap:
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145 return
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146 end = self.datasize
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147 self.allmap = 1
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148 cur = 0
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149 count = 0
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150 blocksize = self.s * 256
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151 self.dataf.seek(0)
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152 while cur < end:
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153 data = self.dataf.read(blocksize)
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154 off = 0
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155 for x in xrange(256):
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156 n = data[off + ngshaoffset:off + ngshaoffset + 20]
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157 self.map[n] = count
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158 count += 1
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159 if count >= self.l:
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160 break
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161 off += self.s
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162 cur += blocksize
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163
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164 def loadblock(self, blockstart, blocksize, data=None):
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165 if self.all:
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166 return
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167 if data is None:
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168 self.dataf.seek(blockstart)
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169 if blockstart + blocksize > self.datasize:
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170 # the revlog may have grown since we've started running,
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171 # but we don't have space in self.index for more entries.
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172 # limit blocksize so that we don't get too much data.
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173 blocksize = max(self.datasize - blockstart, 0)
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174 data = self.dataf.read(blocksize)
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175 lend = len(data) / self.s
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176 i = blockstart / self.s
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177 off = 0
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178 # lazyindex supports __delitem__
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179 if lend > len(self.index) - i:
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180 lend = len(self.index) - i
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181 for x in xrange(lend):
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182 if self.index[i + x] is None:
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183 b = data[off : off + self.s]
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184 self.index[i + x] = b
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185 n = b[ngshaoffset:ngshaoffset + 20]
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186 self.map[n] = i + x
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187 off += self.s
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188
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189 def findnode(self, node):
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190 """search backwards through the index file for a specific node"""
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191 if self.allmap:
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192 return None
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193
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194 # hg log will cause many many searches for the manifest
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195 # nodes. After we get called a few times, just load the whole
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196 # thing.
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197 if self.mapfind_count > 8:
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198 self.loadmap()
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199 if node in self.map:
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200 return node
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201 return None
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202 self.mapfind_count += 1
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203 last = self.l - 1
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204 while self.index[last] != None:
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205 if last == 0:
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206 self.all = 1
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207 self.allmap = 1
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208 return None
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209 last -= 1
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210 end = (last + 1) * self.s
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211 blocksize = self.s * 256
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212 while end >= 0:
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213 start = max(end - blocksize, 0)
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214 self.dataf.seek(start)
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215 data = self.dataf.read(end - start)
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216 findend = end - start
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217 while True:
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218 # we're searching backwards, so we have to make sure
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219 # we don't find a changeset where this node is a parent
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220 off = data.find(node, 0, findend)
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221 findend = off
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222 if off >= 0:
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223 i = off / self.s
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224 off = i * self.s
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225 n = data[off + ngshaoffset:off + ngshaoffset + 20]
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226 if n == node:
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227 self.map[n] = i + start / self.s
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228 return node
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229 else:
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230 break
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231 end -= blocksize
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232 return None
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233
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234 def loadindex(self, i=None, end=None):
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235 if self.all:
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236 return
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237 all = False
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238 if i is None:
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239 blockstart = 0
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240 blocksize = (65536 / self.s) * self.s
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241 end = self.datasize
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242 all = True
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243 else:
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244 if end:
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245 blockstart = i * self.s
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246 end = end * self.s
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247 blocksize = end - blockstart
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248 else:
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249 blockstart = (i & ~1023) * self.s
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250 blocksize = self.s * 1024
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251 end = blockstart + blocksize
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252 while blockstart < end:
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253 self.loadblock(blockstart, blocksize)
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254 blockstart += blocksize
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255 if all:
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256 self.all = True
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257
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258 class lazyindex(object):
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259 """a lazy version of the index array"""
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260 def __init__(self, parser):
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261 self.p = parser
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262 def __len__(self):
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263 return len(self.p.index)
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264 def load(self, pos):
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265 if pos < 0:
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266 pos += len(self.p.index)
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267 self.p.loadindex(pos)
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268 return self.p.index[pos]
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269 def __getitem__(self, pos):
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270 return _unpack(indexformatng, self.p.index[pos] or self.load(pos))
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271 def __setitem__(self, pos, item):
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272 self.p.index[pos] = _pack(indexformatng, *item)
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273 def __delitem__(self, pos):
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274 del self.p.index[pos]
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275 def insert(self, pos, e):
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276 self.p.index.insert(pos, _pack(indexformatng, *e))
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277 def append(self, e):
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278 self.p.index.append(_pack(indexformatng, *e))
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279
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280 class lazymap(object):
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281 """a lazy version of the node map"""
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282 def __init__(self, parser):
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283 self.p = parser
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284 def load(self, key):
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285 n = self.p.findnode(key)
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286 if n is None:
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287 raise KeyError(key)
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288 def __contains__(self, key):
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289 if key in self.p.map:
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290 return True
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291 self.p.loadmap()
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292 return key in self.p.map
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293 def __iter__(self):
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294 yield nullid
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295 for i in xrange(self.p.l):
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296 ret = self.p.index[i]
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297 if not ret:
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298 self.p.loadindex(i)
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299 ret = self.p.index[i]
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300 if isinstance(ret, str):
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301 ret = _unpack(indexformatng, ret)
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302 yield ret[7]
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303 def __getitem__(self, key):
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304 try:
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305 return self.p.map[key]
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306 except KeyError:
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307 try:
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308 self.load(key)
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309 return self.p.map[key]
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310 except KeyError:
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311 raise KeyError("node " + hex(key))
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312 def __setitem__(self, key, val):
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313 self.p.map[key] = val
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314 def __delitem__(self, key):
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315 del self.p.map[key]
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316
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317 indexformatv0 = ">4l20s20s20s"
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318 v0shaoffset = 56
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319
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320 class revlogoldio(object):
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321 def __init__(self):
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322 self.size = struct.calcsize(indexformatv0)
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323
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324 def parseindex(self, fp, data, inline):
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325 s = self.size
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326 index = []
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327 nodemap = {nullid: nullrev}
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328 n = off = 0
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329 if len(data) == _prereadsize:
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330 data += fp.read() # read the rest
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331 l = len(data)
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332 while off + s <= l:
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333 cur = data[off:off + s]
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334 off += s
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335 e = _unpack(indexformatv0, cur)
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336 # transform to revlogv1 format
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337 e2 = (offset_type(e[0], 0), e[1], -1, e[2], e[3],
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338 nodemap.get(e[4], nullrev), nodemap.get(e[5], nullrev), e[6])
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339 index.append(e2)
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340 nodemap[e[6]] = n
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341 n += 1
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342
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343 return index, nodemap, None
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344
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345 def packentry(self, entry, node, version, rev):
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346 e2 = (getoffset(entry[0]), entry[1], entry[3], entry[4],
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347 node(entry[5]), node(entry[6]), entry[7])
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348 return _pack(indexformatv0, *e2)
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349
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350 # index ng:
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351 # 6 bytes offset
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352 # 2 bytes flags
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353 # 4 bytes compressed length
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354 # 4 bytes uncompressed length
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355 # 4 bytes: base rev
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356 # 4 bytes link rev
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357 # 4 bytes parent 1 rev
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358 # 4 bytes parent 2 rev
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359 # 32 bytes: nodeid
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360 indexformatng = ">Qiiiiii20s12x"
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361 ngshaoffset = 32
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362 versionformat = ">I"
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363
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364 class revlogio(object):
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365 def __init__(self):
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366 self.size = struct.calcsize(indexformatng)
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367
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368 def parseindex(self, fp, data, inline):
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369 if len(data) == _prereadsize:
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370 if util.openhardlinks() and not inline:
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371 # big index, let's parse it on demand
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372 parser = lazyparser(fp)
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373 index = lazyindex(parser)
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374 nodemap = lazymap(parser)
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375 e = list(index[0])
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376 type = gettype(e[0])
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377 e[0] = offset_type(0, type)
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378 index[0] = e
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379 return index, nodemap, None
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380 else:
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381 data += fp.read()
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382
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383 # call the C implementation to parse the index data
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384 index, nodemap, cache = parsers.parse_index(data, inline)
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385 return index, nodemap, cache
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386
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387 def packentry(self, entry, node, version, rev):
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388 p = _pack(indexformatng, *entry)
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389 if rev == 0:
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390 p = _pack(versionformat, version) + p[4:]
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391 return p
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392
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393 class revlog(object):
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394 """
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395 the underlying revision storage object
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396
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397 A revlog consists of two parts, an index and the revision data.
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398
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399 The index is a file with a fixed record size containing
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400 information on each revision, including its nodeid (hash), the
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401 nodeids of its parents, the position and offset of its data within
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402 the data file, and the revision it's based on. Finally, each entry
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403 contains a linkrev entry that can serve as a pointer to external
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404 data.
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405
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406 The revision data itself is a linear collection of data chunks.
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407 Each chunk represents a revision and is usually represented as a
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408 delta against the previous chunk. To bound lookup time, runs of
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409 deltas are limited to about 2 times the length of the original
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410 version data. This makes retrieval of a version proportional to
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411 its size, or O(1) relative to the number of revisions.
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412
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413 Both pieces of the revlog are written to in an append-only
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414 fashion, which means we never need to rewrite a file to insert or
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415 remove data, and can use some simple techniques to avoid the need
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416 for locking while reading.
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417 """
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418 def __init__(self, opener, indexfile):
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419 """
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420 create a revlog object
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421
|
|
|
422 opener is a function that abstracts the file opening operation
|
|
|
423 and can be used to implement COW semantics or the like.
|
|
|
424 """
|
|
|
425 self.indexfile = indexfile
|
|
|
426 self.datafile = indexfile[:-2] + ".d"
|
|
|
427 self.opener = opener
|
|
|
428 self._cache = None
|
|
|
429 self._chunkcache = (0, '')
|
|
|
430 self.nodemap = {nullid: nullrev}
|
|
|
431 self.index = []
|
|
|
432
|
|
|
433 v = REVLOG_DEFAULT_VERSION
|
|
|
434 if hasattr(opener, "defversion"):
|
|
|
435 v = opener.defversion
|
|
|
436 if v & REVLOGNG:
|
|
|
437 v |= REVLOGNGINLINEDATA
|
|
|
438
|
|
|
439 i = ''
|
|
|
440 try:
|
|
|
441 f = self.opener(self.indexfile)
|
|
|
442 i = f.read(_prereadsize)
|
|
|
443 if len(i) > 0:
|
|
|
444 v = struct.unpack(versionformat, i[:4])[0]
|
|
|
445 except IOError, inst:
|
|
|
446 if inst.errno != errno.ENOENT:
|
|
|
447 raise
|
|
|
448
|
|
|
449 self.version = v
|
|
|
450 self._inline = v & REVLOGNGINLINEDATA
|
|
|
451 flags = v & ~0xFFFF
|
|
|
452 fmt = v & 0xFFFF
|
|
|
453 if fmt == REVLOGV0 and flags:
|
|
|
454 raise RevlogError(_("index %s unknown flags %#04x for format v0")
|
|
|
455 % (self.indexfile, flags >> 16))
|
|
|
456 elif fmt == REVLOGNG and flags & ~REVLOGNGINLINEDATA:
|
|
|
457 raise RevlogError(_("index %s unknown flags %#04x for revlogng")
|
|
|
458 % (self.indexfile, flags >> 16))
|
|
|
459 elif fmt > REVLOGNG:
|
|
|
460 raise RevlogError(_("index %s unknown format %d")
|
|
|
461 % (self.indexfile, fmt))
|
|
|
462
|
|
|
463 self._io = revlogio()
|
|
|
464 if self.version == REVLOGV0:
|
|
|
465 self._io = revlogoldio()
|
|
|
466 if i:
|
|
|
467 try:
|
|
|
468 d = self._io.parseindex(f, i, self._inline)
|
|
|
469 except (ValueError, IndexError), e:
|
|
|
470 raise RevlogError(_("index %s is corrupted") % (self.indexfile))
|
|
|
471 self.index, self.nodemap, self._chunkcache = d
|
|
|
472 if not self._chunkcache:
|
|
|
473 self._chunkclear()
|
|
|
474
|
|
|
475 # add the magic null revision at -1 (if it hasn't been done already)
|
|
|
476 if (self.index == [] or isinstance(self.index, lazyindex) or
|
|
|
477 self.index[-1][7] != nullid) :
|
|
|
478 self.index.append((0, 0, 0, -1, -1, -1, -1, nullid))
|
|
|
479
|
|
|
480 def _loadindex(self, start, end):
|
|
|
481 """load a block of indexes all at once from the lazy parser"""
|
|
|
482 if isinstance(self.index, lazyindex):
|
|
|
483 self.index.p.loadindex(start, end)
|
|
|
484
|
|
|
485 def _loadindexmap(self):
|
|
|
486 """loads both the map and the index from the lazy parser"""
|
|
|
487 if isinstance(self.index, lazyindex):
|
|
|
488 p = self.index.p
|
|
|
489 p.loadindex()
|
|
|
490 self.nodemap = p.map
|
|
|
491
|
|
|
492 def _loadmap(self):
|
|
|
493 """loads the map from the lazy parser"""
|
|
|
494 if isinstance(self.nodemap, lazymap):
|
|
|
495 self.nodemap.p.loadmap()
|
|
|
496 self.nodemap = self.nodemap.p.map
|
|
|
497
|
|
|
498 def tip(self):
|
|
|
499 return self.node(len(self.index) - 2)
|
|
|
500 def __len__(self):
|
|
|
501 return len(self.index) - 1
|
|
|
502 def __iter__(self):
|
|
|
503 for i in xrange(len(self)):
|
|
|
504 yield i
|
|
|
505 def rev(self, node):
|
|
|
506 try:
|
|
|
507 return self.nodemap[node]
|
|
|
508 except KeyError:
|
|
|
509 raise LookupError(node, self.indexfile, _('no node'))
|
|
|
510 def node(self, rev):
|
|
|
511 return self.index[rev][7]
|
|
|
512 def linkrev(self, rev):
|
|
|
513 return self.index[rev][4]
|
|
|
514 def parents(self, node):
|
|
|
515 i = self.index
|
|
|
516 d = i[self.rev(node)]
|
|
|
517 return i[d[5]][7], i[d[6]][7] # map revisions to nodes inline
|
|
|
518 def parentrevs(self, rev):
|
|
|
519 return self.index[rev][5:7]
|
|
|
520 def start(self, rev):
|
|
|
521 return int(self.index[rev][0] >> 16)
|
|
|
522 def end(self, rev):
|
|
|
523 return self.start(rev) + self.length(rev)
|
|
|
524 def length(self, rev):
|
|
|
525 return self.index[rev][1]
|
|
|
526 def base(self, rev):
|
|
|
527 return self.index[rev][3]
|
|
|
528
|
|
|
529 def size(self, rev):
|
|
|
530 """return the length of the uncompressed text for a given revision"""
|
|
|
531 l = self.index[rev][2]
|
|
|
532 if l >= 0:
|
|
|
533 return l
|
|
|
534
|
|
|
535 t = self.revision(self.node(rev))
|
|
|
536 return len(t)
|
|
|
537
|
|
|
538 # Alternate implementation. The advantage to this code is it
|
|
|
539 # will be faster for a single revision. However, the results
|
|
|
540 # are not cached, so finding the size of every revision will
|
|
|
541 # be slower.
|
|
|
542 #
|
|
|
543 # if self.cache and self.cache[1] == rev:
|
|
|
544 # return len(self.cache[2])
|
|
|
545 #
|
|
|
546 # base = self.base(rev)
|
|
|
547 # if self.cache and self.cache[1] >= base and self.cache[1] < rev:
|
|
|
548 # base = self.cache[1]
|
|
|
549 # text = self.cache[2]
|
|
|
550 # else:
|
|
|
551 # text = self.revision(self.node(base))
|
|
|
552 #
|
|
|
553 # l = len(text)
|
|
|
554 # for x in xrange(base + 1, rev + 1):
|
|
|
555 # l = mdiff.patchedsize(l, self._chunk(x))
|
|
|
556 # return l
|
|
|
557
|
|
|
558 def reachable(self, node, stop=None):
|
|
|
559 """return the set of all nodes ancestral to a given node, including
|
|
|
560 the node itself, stopping when stop is matched"""
|
|
|
561 reachable = set((node,))
|
|
|
562 visit = [node]
|
|
|
563 if stop:
|
|
|
564 stopn = self.rev(stop)
|
|
|
565 else:
|
|
|
566 stopn = 0
|
|
|
567 while visit:
|
|
|
568 n = visit.pop(0)
|
|
|
569 if n == stop:
|
|
|
570 continue
|
|
|
571 if n == nullid:
|
|
|
572 continue
|
|
|
573 for p in self.parents(n):
|
|
|
574 if self.rev(p) < stopn:
|
|
|
575 continue
|
|
|
576 if p not in reachable:
|
|
|
577 reachable.add(p)
|
|
|
578 visit.append(p)
|
|
|
579 return reachable
|
|
|
580
|
|
|
581 def ancestors(self, *revs):
|
|
|
582 'Generate the ancestors of revs using a breadth-first visit'
|
|
|
583 visit = list(revs)
|
|
|
584 seen = set([nullrev])
|
|
|
585 while visit:
|
|
|
586 for parent in self.parentrevs(visit.pop(0)):
|
|
|
587 if parent not in seen:
|
|
|
588 visit.append(parent)
|
|
|
589 seen.add(parent)
|
|
|
590 yield parent
|
|
|
591
|
|
|
592 def descendants(self, *revs):
|
|
|
593 'Generate the descendants of revs in topological order'
|
|
|
594 seen = set(revs)
|
|
|
595 for i in xrange(min(revs) + 1, len(self)):
|
|
|
596 for x in self.parentrevs(i):
|
|
|
597 if x != nullrev and x in seen:
|
|
|
598 seen.add(i)
|
|
|
599 yield i
|
|
|
600 break
|
|
|
601
|
|
|
602 def findmissing(self, common=None, heads=None):
|
|
|
603 '''
|
|
|
604 returns the topologically sorted list of nodes from the set:
|
|
|
605 missing = (ancestors(heads) \ ancestors(common))
|
|
|
606
|
|
|
607 where ancestors() is the set of ancestors from heads, heads included
|
|
|
608
|
|
|
609 if heads is None, the heads of the revlog are used
|
|
|
610 if common is None, nullid is assumed to be a common node
|
|
|
611 '''
|
|
|
612 if common is None:
|
|
|
613 common = [nullid]
|
|
|
614 if heads is None:
|
|
|
615 heads = self.heads()
|
|
|
616
|
|
|
617 common = [self.rev(n) for n in common]
|
|
|
618 heads = [self.rev(n) for n in heads]
|
|
|
619
|
|
|
620 # we want the ancestors, but inclusive
|
|
|
621 has = set(self.ancestors(*common))
|
|
|
622 has.add(nullrev)
|
|
|
623 has.update(common)
|
|
|
624
|
|
|
625 # take all ancestors from heads that aren't in has
|
|
|
626 missing = set()
|
|
|
627 visit = [r for r in heads if r not in has]
|
|
|
628 while visit:
|
|
|
629 r = visit.pop(0)
|
|
|
630 if r in missing:
|
|
|
631 continue
|
|
|
632 else:
|
|
|
633 missing.add(r)
|
|
|
634 for p in self.parentrevs(r):
|
|
|
635 if p not in has:
|
|
|
636 visit.append(p)
|
|
|
637 missing = list(missing)
|
|
|
638 missing.sort()
|
|
|
639 return [self.node(r) for r in missing]
|
|
|
640
|
|
|
641 def nodesbetween(self, roots=None, heads=None):
|
|
|
642 """Return a tuple containing three elements. Elements 1 and 2 contain
|
|
|
643 a final list bases and heads after all the unreachable ones have been
|
|
|
644 pruned. Element 0 contains a topologically sorted list of all
|
|
|
645
|
|
|
646 nodes that satisfy these constraints:
|
|
|
647 1. All nodes must be descended from a node in roots (the nodes on
|
|
|
648 roots are considered descended from themselves).
|
|
|
649 2. All nodes must also be ancestors of a node in heads (the nodes in
|
|
|
650 heads are considered to be their own ancestors).
|
|
|
651
|
|
|
652 If roots is unspecified, nullid is assumed as the only root.
|
|
|
653 If heads is unspecified, it is taken to be the output of the
|
|
|
654 heads method (i.e. a list of all nodes in the repository that
|
|
|
655 have no children)."""
|
|
|
656 nonodes = ([], [], [])
|
|
|
657 if roots is not None:
|
|
|
658 roots = list(roots)
|
|
|
659 if not roots:
|
|
|
660 return nonodes
|
|
|
661 lowestrev = min([self.rev(n) for n in roots])
|
|
|
662 else:
|
|
|
663 roots = [nullid] # Everybody's a descendent of nullid
|
|
|
664 lowestrev = nullrev
|
|
|
665 if (lowestrev == nullrev) and (heads is None):
|
|
|
666 # We want _all_ the nodes!
|
|
|
667 return ([self.node(r) for r in self], [nullid], list(self.heads()))
|
|
|
668 if heads is None:
|
|
|
669 # All nodes are ancestors, so the latest ancestor is the last
|
|
|
670 # node.
|
|
|
671 highestrev = len(self) - 1
|
|
|
672 # Set ancestors to None to signal that every node is an ancestor.
|
|
|
673 ancestors = None
|
|
|
674 # Set heads to an empty dictionary for later discovery of heads
|
|
|
675 heads = {}
|
|
|
676 else:
|
|
|
677 heads = list(heads)
|
|
|
678 if not heads:
|
|
|
679 return nonodes
|
|
|
680 ancestors = set()
|
|
|
681 # Turn heads into a dictionary so we can remove 'fake' heads.
|
|
|
682 # Also, later we will be using it to filter out the heads we can't
|
|
|
683 # find from roots.
|
|
|
684 heads = dict.fromkeys(heads, 0)
|
|
|
685 # Start at the top and keep marking parents until we're done.
|
|
|
686 nodestotag = set(heads)
|
|
|
687 # Remember where the top was so we can use it as a limit later.
|
|
|
688 highestrev = max([self.rev(n) for n in nodestotag])
|
|
|
689 while nodestotag:
|
|
|
690 # grab a node to tag
|
|
|
691 n = nodestotag.pop()
|
|
|
692 # Never tag nullid
|
|
|
693 if n == nullid:
|
|
|
694 continue
|
|
|
695 # A node's revision number represents its place in a
|
|
|
696 # topologically sorted list of nodes.
|
|
|
697 r = self.rev(n)
|
|
|
698 if r >= lowestrev:
|
|
|
699 if n not in ancestors:
|
|
|
700 # If we are possibly a descendent of one of the roots
|
|
|
701 # and we haven't already been marked as an ancestor
|
|
|
702 ancestors.add(n) # Mark as ancestor
|
|
|
703 # Add non-nullid parents to list of nodes to tag.
|
|
|
704 nodestotag.update([p for p in self.parents(n) if
|
|
|
705 p != nullid])
|
|
|
706 elif n in heads: # We've seen it before, is it a fake head?
|
|
|
707 # So it is, real heads should not be the ancestors of
|
|
|
708 # any other heads.
|
|
|
709 heads.pop(n)
|
|
|
710 if not ancestors:
|
|
|
711 return nonodes
|
|
|
712 # Now that we have our set of ancestors, we want to remove any
|
|
|
713 # roots that are not ancestors.
|
|
|
714
|
|
|
715 # If one of the roots was nullid, everything is included anyway.
|
|
|
716 if lowestrev > nullrev:
|
|
|
717 # But, since we weren't, let's recompute the lowest rev to not
|
|
|
718 # include roots that aren't ancestors.
|
|
|
719
|
|
|
720 # Filter out roots that aren't ancestors of heads
|
|
|
721 roots = [n for n in roots if n in ancestors]
|
|
|
722 # Recompute the lowest revision
|
|
|
723 if roots:
|
|
|
724 lowestrev = min([self.rev(n) for n in roots])
|
|
|
725 else:
|
|
|
726 # No more roots? Return empty list
|
|
|
727 return nonodes
|
|
|
728 else:
|
|
|
729 # We are descending from nullid, and don't need to care about
|
|
|
730 # any other roots.
|
|
|
731 lowestrev = nullrev
|
|
|
732 roots = [nullid]
|
|
|
733 # Transform our roots list into a set.
|
|
|
734 descendents = set(roots)
|
|
|
735 # Also, keep the original roots so we can filter out roots that aren't
|
|
|
736 # 'real' roots (i.e. are descended from other roots).
|
|
|
737 roots = descendents.copy()
|
|
|
738 # Our topologically sorted list of output nodes.
|
|
|
739 orderedout = []
|
|
|
740 # Don't start at nullid since we don't want nullid in our output list,
|
|
|
741 # and if nullid shows up in descedents, empty parents will look like
|
|
|
742 # they're descendents.
|
|
|
743 for r in xrange(max(lowestrev, 0), highestrev + 1):
|
|
|
744 n = self.node(r)
|
|
|
745 isdescendent = False
|
|
|
746 if lowestrev == nullrev: # Everybody is a descendent of nullid
|
|
|
747 isdescendent = True
|
|
|
748 elif n in descendents:
|
|
|
749 # n is already a descendent
|
|
|
750 isdescendent = True
|
|
|
751 # This check only needs to be done here because all the roots
|
|
|
752 # will start being marked is descendents before the loop.
|
|
|
753 if n in roots:
|
|
|
754 # If n was a root, check if it's a 'real' root.
|
|
|
755 p = tuple(self.parents(n))
|
|
|
756 # If any of its parents are descendents, it's not a root.
|
|
|
757 if (p[0] in descendents) or (p[1] in descendents):
|
|
|
758 roots.remove(n)
|
|
|
759 else:
|
|
|
760 p = tuple(self.parents(n))
|
|
|
761 # A node is a descendent if either of its parents are
|
|
|
762 # descendents. (We seeded the dependents list with the roots
|
|
|
763 # up there, remember?)
|
|
|
764 if (p[0] in descendents) or (p[1] in descendents):
|
|
|
765 descendents.add(n)
|
|
|
766 isdescendent = True
|
|
|
767 if isdescendent and ((ancestors is None) or (n in ancestors)):
|
|
|
768 # Only include nodes that are both descendents and ancestors.
|
|
|
769 orderedout.append(n)
|
|
|
770 if (ancestors is not None) and (n in heads):
|
|
|
771 # We're trying to figure out which heads are reachable
|
|
|
772 # from roots.
|
|
|
773 # Mark this head as having been reached
|
|
|
774 heads[n] = 1
|
|
|
775 elif ancestors is None:
|
|
|
776 # Otherwise, we're trying to discover the heads.
|
|
|
777 # Assume this is a head because if it isn't, the next step
|
|
|
778 # will eventually remove it.
|
|
|
779 heads[n] = 1
|
|
|
780 # But, obviously its parents aren't.
|
|
|
781 for p in self.parents(n):
|
|
|
782 heads.pop(p, None)
|
|
|
783 heads = [n for n in heads.iterkeys() if heads[n] != 0]
|
|
|
784 roots = list(roots)
|
|
|
785 assert orderedout
|
|
|
786 assert roots
|
|
|
787 assert heads
|
|
|
788 return (orderedout, roots, heads)
|
|
|
789
|
|
|
790 def heads(self, start=None, stop=None):
|
|
|
791 """return the list of all nodes that have no children
|
|
|
792
|
|
|
793 if start is specified, only heads that are descendants of
|
|
|
794 start will be returned
|
|
|
795 if stop is specified, it will consider all the revs from stop
|
|
|
796 as if they had no children
|
|
|
797 """
|
|
|
798 if start is None and stop is None:
|
|
|
799 count = len(self)
|
|
|
800 if not count:
|
|
|
801 return [nullid]
|
|
|
802 ishead = [1] * (count + 1)
|
|
|
803 index = self.index
|
|
|
804 for r in xrange(count):
|
|
|
805 e = index[r]
|
|
|
806 ishead[e[5]] = ishead[e[6]] = 0
|
|
|
807 return [self.node(r) for r in xrange(count) if ishead[r]]
|
|
|
808
|
|
|
809 if start is None:
|
|
|
810 start = nullid
|
|
|
811 if stop is None:
|
|
|
812 stop = []
|
|
|
813 stoprevs = set([self.rev(n) for n in stop])
|
|
|
814 startrev = self.rev(start)
|
|
|
815 reachable = set((startrev,))
|
|
|
816 heads = set((startrev,))
|
|
|
817
|
|
|
818 parentrevs = self.parentrevs
|
|
|
819 for r in xrange(startrev + 1, len(self)):
|
|
|
820 for p in parentrevs(r):
|
|
|
821 if p in reachable:
|
|
|
822 if r not in stoprevs:
|
|
|
823 reachable.add(r)
|
|
|
824 heads.add(r)
|
|
|
825 if p in heads and p not in stoprevs:
|
|
|
826 heads.remove(p)
|
|
|
827
|
|
|
828 return [self.node(r) for r in heads]
|
|
|
829
|
|
|
830 def children(self, node):
|
|
|
831 """find the children of a given node"""
|
|
|
832 c = []
|
|
|
833 p = self.rev(node)
|
|
|
834 for r in range(p + 1, len(self)):
|
|
|
835 prevs = [pr for pr in self.parentrevs(r) if pr != nullrev]
|
|
|
836 if prevs:
|
|
|
837 for pr in prevs:
|
|
|
838 if pr == p:
|
|
|
839 c.append(self.node(r))
|
|
|
840 elif p == nullrev:
|
|
|
841 c.append(self.node(r))
|
|
|
842 return c
|
|
|
843
|
|
|
844 def _match(self, id):
|
|
|
845 if isinstance(id, (long, int)):
|
|
|
846 # rev
|
|
|
847 return self.node(id)
|
|
|
848 if len(id) == 20:
|
|
|
849 # possibly a binary node
|
|
|
850 # odds of a binary node being all hex in ASCII are 1 in 10**25
|
|
|
851 try:
|
|
|
852 node = id
|
|
|
853 self.rev(node) # quick search the index
|
|
|
854 return node
|
|
|
855 except LookupError:
|
|
|
856 pass # may be partial hex id
|
|
|
857 try:
|
|
|
858 # str(rev)
|
|
|
859 rev = int(id)
|
|
|
860 if str(rev) != id:
|
|
|
861 raise ValueError
|
|
|
862 if rev < 0:
|
|
|
863 rev = len(self) + rev
|
|
|
864 if rev < 0 or rev >= len(self):
|
|
|
865 raise ValueError
|
|
|
866 return self.node(rev)
|
|
|
867 except (ValueError, OverflowError):
|
|
|
868 pass
|
|
|
869 if len(id) == 40:
|
|
|
870 try:
|
|
|
871 # a full hex nodeid?
|
|
|
872 node = bin(id)
|
|
|
873 self.rev(node)
|
|
|
874 return node
|
|
|
875 except (TypeError, LookupError):
|
|
|
876 pass
|
|
|
877
|
|
|
878 def _partialmatch(self, id):
|
|
|
879 if len(id) < 40:
|
|
|
880 try:
|
|
|
881 # hex(node)[:...]
|
|
|
882 l = len(id) / 2 # grab an even number of digits
|
|
|
883 bin_id = bin(id[:l*2])
|
|
|
884 nl = [n for n in self.nodemap if n[:l] == bin_id]
|
|
|
885 nl = [n for n in nl if hex(n).startswith(id)]
|
|
|
886 if len(nl) > 0:
|
|
|
887 if len(nl) == 1:
|
|
|
888 return nl[0]
|
|
|
889 raise LookupError(id, self.indexfile,
|
|
|
890 _('ambiguous identifier'))
|
|
|
891 return None
|
|
|
892 except TypeError:
|
|
|
893 pass
|
|
|
894
|
|
|
895 def lookup(self, id):
|
|
|
896 """locate a node based on:
|
|
|
897 - revision number or str(revision number)
|
|
|
898 - nodeid or subset of hex nodeid
|
|
|
899 """
|
|
|
900 n = self._match(id)
|
|
|
901 if n is not None:
|
|
|
902 return n
|
|
|
903 n = self._partialmatch(id)
|
|
|
904 if n:
|
|
|
905 return n
|
|
|
906
|
|
|
907 raise LookupError(id, self.indexfile, _('no match found'))
|
|
|
908
|
|
|
909 def cmp(self, node, text):
|
|
|
910 """compare text with a given file revision"""
|
|
|
911 p1, p2 = self.parents(node)
|
|
|
912 return hash(text, p1, p2) != node
|
|
|
913
|
|
|
914 def _addchunk(self, offset, data):
|
|
|
915 o, d = self._chunkcache
|
|
|
916 # try to add to existing cache
|
|
|
917 if o + len(d) == offset and len(d) + len(data) < _prereadsize:
|
|
|
918 self._chunkcache = o, d + data
|
|
|
919 else:
|
|
|
920 self._chunkcache = offset, data
|
|
|
921
|
|
|
922 def _loadchunk(self, offset, length):
|
|
|
923 if self._inline:
|
|
|
924 df = self.opener(self.indexfile)
|
|
|
925 else:
|
|
|
926 df = self.opener(self.datafile)
|
|
|
927
|
|
|
928 readahead = max(65536, length)
|
|
|
929 df.seek(offset)
|
|
|
930 d = df.read(readahead)
|
|
|
931 self._addchunk(offset, d)
|
|
|
932 if readahead > length:
|
|
|
933 return d[:length]
|
|
|
934 return d
|
|
|
935
|
|
|
936 def _getchunk(self, offset, length):
|
|
|
937 o, d = self._chunkcache
|
|
|
938 l = len(d)
|
|
|
939
|
|
|
940 # is it in the cache?
|
|
|
941 cachestart = offset - o
|
|
|
942 cacheend = cachestart + length
|
|
|
943 if cachestart >= 0 and cacheend <= l:
|
|
|
944 if cachestart == 0 and cacheend == l:
|
|
|
945 return d # avoid a copy
|
|
|
946 return d[cachestart:cacheend]
|
|
|
947
|
|
|
948 return self._loadchunk(offset, length)
|
|
|
949
|
|
|
950 def _chunkraw(self, startrev, endrev):
|
|
|
951 start = self.start(startrev)
|
|
|
952 length = self.end(endrev) - start
|
|
|
953 if self._inline:
|
|
|
954 start += (startrev + 1) * self._io.size
|
|
|
955 return self._getchunk(start, length)
|
|
|
956
|
|
|
957 def _chunk(self, rev):
|
|
|
958 return decompress(self._chunkraw(rev, rev))
|
|
|
959
|
|
|
960 def _chunkclear(self):
|
|
|
961 self._chunkcache = (0, '')
|
|
|
962
|
|
|
963 def revdiff(self, rev1, rev2):
|
|
|
964 """return or calculate a delta between two revisions"""
|
|
|
965 if rev1 + 1 == rev2 and self.base(rev1) == self.base(rev2):
|
|
|
966 return self._chunk(rev2)
|
|
|
967
|
|
|
968 return mdiff.textdiff(self.revision(self.node(rev1)),
|
|
|
969 self.revision(self.node(rev2)))
|
|
|
970
|
|
|
971 def revision(self, node):
|
|
|
972 """return an uncompressed revision of a given node"""
|
|
|
973 if node == nullid:
|
|
|
974 return ""
|
|
|
975 if self._cache and self._cache[0] == node:
|
|
|
976 return str(self._cache[2])
|
|
|
977
|
|
|
978 # look up what we need to read
|
|
|
979 text = None
|
|
|
980 rev = self.rev(node)
|
|
|
981 base = self.base(rev)
|
|
|
982
|
|
|
983 # check rev flags
|
|
|
984 if self.index[rev][0] & 0xFFFF:
|
|
|
985 raise RevlogError(_('incompatible revision flag %x') %
|
|
|
986 (self.index[rev][0] & 0xFFFF))
|
|
|
987
|
|
|
988 # do we have useful data cached?
|
|
|
989 if self._cache and self._cache[1] >= base and self._cache[1] < rev:
|
|
|
990 base = self._cache[1]
|
|
|
991 text = str(self._cache[2])
|
|
|
992
|
|
|
993 self._loadindex(base, rev + 1)
|
|
|
994 self._chunkraw(base, rev)
|
|
|
995 if text is None:
|
|
|
996 text = self._chunk(base)
|
|
|
997
|
|
|
998 bins = [self._chunk(r) for r in xrange(base + 1, rev + 1)]
|
|
|
999 text = mdiff.patches(text, bins)
|
|
|
1000 p1, p2 = self.parents(node)
|
|
|
1001 if node != hash(text, p1, p2):
|
|
|
1002 raise RevlogError(_("integrity check failed on %s:%d")
|
|
|
1003 % (self.indexfile, rev))
|
|
|
1004
|
|
|
1005 self._cache = (node, rev, text)
|
|
|
1006 return text
|
|
|
1007
|
|
|
1008 def checkinlinesize(self, tr, fp=None):
|
|
|
1009 if not self._inline or (self.start(-2) + self.length(-2)) < 131072:
|
|
|
1010 return
|
|
|
1011
|
|
|
1012 trinfo = tr.find(self.indexfile)
|
|
|
1013 if trinfo is None:
|
|
|
1014 raise RevlogError(_("%s not found in the transaction")
|
|
|
1015 % self.indexfile)
|
|
|
1016
|
|
|
1017 trindex = trinfo[2]
|
|
|
1018 dataoff = self.start(trindex)
|
|
|
1019
|
|
|
1020 tr.add(self.datafile, dataoff)
|
|
|
1021
|
|
|
1022 if fp:
|
|
|
1023 fp.flush()
|
|
|
1024 fp.close()
|
|
|
1025
|
|
|
1026 df = self.opener(self.datafile, 'w')
|
|
|
1027 try:
|
|
|
1028 for r in self:
|
|
|
1029 df.write(self._chunkraw(r, r))
|
|
|
1030 finally:
|
|
|
1031 df.close()
|
|
|
1032
|
|
|
1033 fp = self.opener(self.indexfile, 'w', atomictemp=True)
|
|
|
1034 self.version &= ~(REVLOGNGINLINEDATA)
|
|
|
1035 self._inline = False
|
|
|
1036 for i in self:
|
|
|
1037 e = self._io.packentry(self.index[i], self.node, self.version, i)
|
|
|
1038 fp.write(e)
|
|
|
1039
|
|
|
1040 # if we don't call rename, the temp file will never replace the
|
|
|
1041 # real index
|
|
|
1042 fp.rename()
|
|
|
1043
|
|
|
1044 tr.replace(self.indexfile, trindex * self._io.size)
|
|
|
1045 self._chunkclear()
|
|
|
1046
|
|
|
1047 def addrevision(self, text, transaction, link, p1, p2, d=None):
|
|
|
1048 """add a revision to the log
|
|
|
1049
|
|
|
1050 text - the revision data to add
|
|
|
1051 transaction - the transaction object used for rollback
|
|
|
1052 link - the linkrev data to add
|
|
|
1053 p1, p2 - the parent nodeids of the revision
|
|
|
1054 d - an optional precomputed delta
|
|
|
1055 """
|
|
|
1056 dfh = None
|
|
|
1057 if not self._inline:
|
|
|
1058 dfh = self.opener(self.datafile, "a")
|
|
|
1059 ifh = self.opener(self.indexfile, "a+")
|
|
|
1060 try:
|
|
|
1061 return self._addrevision(text, transaction, link, p1, p2, d, ifh, dfh)
|
|
|
1062 finally:
|
|
|
1063 if dfh:
|
|
|
1064 dfh.close()
|
|
|
1065 ifh.close()
|
|
|
1066
|
|
|
1067 def _addrevision(self, text, transaction, link, p1, p2, d, ifh, dfh):
|
|
|
1068 node = hash(text, p1, p2)
|
|
|
1069 if node in self.nodemap:
|
|
|
1070 return node
|
|
|
1071
|
|
|
1072 curr = len(self)
|
|
|
1073 prev = curr - 1
|
|
|
1074 base = self.base(prev)
|
|
|
1075 offset = self.end(prev)
|
|
|
1076
|
|
|
1077 if curr:
|
|
|
1078 if not d:
|
|
|
1079 ptext = self.revision(self.node(prev))
|
|
|
1080 d = mdiff.textdiff(ptext, text)
|
|
|
1081 data = compress(d)
|
|
|
1082 l = len(data[1]) + len(data[0])
|
|
|
1083 dist = l + offset - self.start(base)
|
|
|
1084
|
|
|
1085 # full versions are inserted when the needed deltas
|
|
|
1086 # become comparable to the uncompressed text
|
|
|
1087 if not curr or dist > len(text) * 2:
|
|
|
1088 data = compress(text)
|
|
|
1089 l = len(data[1]) + len(data[0])
|
|
|
1090 base = curr
|
|
|
1091
|
|
|
1092 e = (offset_type(offset, 0), l, len(text),
|
|
|
1093 base, link, self.rev(p1), self.rev(p2), node)
|
|
|
1094 self.index.insert(-1, e)
|
|
|
1095 self.nodemap[node] = curr
|
|
|
1096
|
|
|
1097 entry = self._io.packentry(e, self.node, self.version, curr)
|
|
|
1098 if not self._inline:
|
|
|
1099 transaction.add(self.datafile, offset)
|
|
|
1100 transaction.add(self.indexfile, curr * len(entry))
|
|
|
1101 if data[0]:
|
|
|
1102 dfh.write(data[0])
|
|
|
1103 dfh.write(data[1])
|
|
|
1104 dfh.flush()
|
|
|
1105 ifh.write(entry)
|
|
|
1106 else:
|
|
|
1107 offset += curr * self._io.size
|
|
|
1108 transaction.add(self.indexfile, offset, curr)
|
|
|
1109 ifh.write(entry)
|
|
|
1110 ifh.write(data[0])
|
|
|
1111 ifh.write(data[1])
|
|
|
1112 self.checkinlinesize(transaction, ifh)
|
|
|
1113
|
|
|
1114 self._cache = (node, curr, text)
|
|
|
1115 return node
|
|
|
1116
|
|
|
1117 def ancestor(self, a, b):
|
|
|
1118 """calculate the least common ancestor of nodes a and b"""
|
|
|
1119
|
|
|
1120 def parents(rev):
|
|
|
1121 return [p for p in self.parentrevs(rev) if p != nullrev]
|
|
|
1122
|
|
|
1123 c = ancestor.ancestor(self.rev(a), self.rev(b), parents)
|
|
|
1124 if c is None:
|
|
|
1125 return nullid
|
|
|
1126
|
|
|
1127 return self.node(c)
|
|
|
1128
|
|
|
1129 def group(self, nodelist, lookup, infocollect=None):
|
|
|
1130 """calculate a delta group
|
|
|
1131
|
|
|
1132 Given a list of changeset revs, return a set of deltas and
|
|
|
1133 metadata corresponding to nodes. the first delta is
|
|
|
1134 parent(nodes[0]) -> nodes[0] the receiver is guaranteed to
|
|
|
1135 have this parent as it has all history before these
|
|
|
1136 changesets. parent is parent[0]
|
|
|
1137 """
|
|
|
1138
|
|
|
1139 revs = [self.rev(n) for n in nodelist]
|
|
|
1140
|
|
|
1141 # if we don't have any revisions touched by these changesets, bail
|
|
|
1142 if not revs:
|
|
|
1143 yield changegroup.closechunk()
|
|
|
1144 return
|
|
|
1145
|
|
|
1146 # add the parent of the first rev
|
|
|
1147 p = self.parentrevs(revs[0])[0]
|
|
|
1148 revs.insert(0, p)
|
|
|
1149
|
|
|
1150 # build deltas
|
|
|
1151 for d in xrange(len(revs) - 1):
|
|
|
1152 a, b = revs[d], revs[d + 1]
|
|
|
1153 nb = self.node(b)
|
|
|
1154
|
|
|
1155 if infocollect is not None:
|
|
|
1156 infocollect(nb)
|
|
|
1157
|
|
|
1158 p = self.parents(nb)
|
|
|
1159 meta = nb + p[0] + p[1] + lookup(nb)
|
|
|
1160 if a == -1:
|
|
|
1161 d = self.revision(nb)
|
|
|
1162 meta += mdiff.trivialdiffheader(len(d))
|
|
|
1163 else:
|
|
|
1164 d = self.revdiff(a, b)
|
|
|
1165 yield changegroup.chunkheader(len(meta) + len(d))
|
|
|
1166 yield meta
|
|
|
1167 if len(d) > 2**20:
|
|
|
1168 pos = 0
|
|
|
1169 while pos < len(d):
|
|
|
1170 pos2 = pos + 2 ** 18
|
|
|
1171 yield d[pos:pos2]
|
|
|
1172 pos = pos2
|
|
|
1173 else:
|
|
|
1174 yield d
|
|
|
1175
|
|
|
1176 yield changegroup.closechunk()
|
|
|
1177
|
|
|
1178 def addgroup(self, revs, linkmapper, transaction):
|
|
|
1179 """
|
|
|
1180 add a delta group
|
|
|
1181
|
|
|
1182 given a set of deltas, add them to the revision log. the
|
|
|
1183 first delta is against its parent, which should be in our
|
|
|
1184 log, the rest are against the previous delta.
|
|
|
1185 """
|
|
|
1186
|
|
|
1187 #track the base of the current delta log
|
|
|
1188 r = len(self)
|
|
|
1189 t = r - 1
|
|
|
1190 node = None
|
|
|
1191
|
|
|
1192 base = prev = nullrev
|
|
|
1193 start = end = textlen = 0
|
|
|
1194 if r:
|
|
|
1195 end = self.end(t)
|
|
|
1196
|
|
|
1197 ifh = self.opener(self.indexfile, "a+")
|
|
|
1198 isize = r * self._io.size
|
|
|
1199 if self._inline:
|
|
|
1200 transaction.add(self.indexfile, end + isize, r)
|
|
|
1201 dfh = None
|
|
|
1202 else:
|
|
|
1203 transaction.add(self.indexfile, isize, r)
|
|
|
1204 transaction.add(self.datafile, end)
|
|
|
1205 dfh = self.opener(self.datafile, "a")
|
|
|
1206
|
|
|
1207 try:
|
|
|
1208 # loop through our set of deltas
|
|
|
1209 chain = None
|
|
|
1210 for chunk in revs:
|
|
|
1211 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80])
|
|
|
1212 link = linkmapper(cs)
|
|
|
1213 if node in self.nodemap:
|
|
|
1214 # this can happen if two branches make the same change
|
|
|
1215 chain = node
|
|
|
1216 continue
|
|
|
1217 delta = buffer(chunk, 80)
|
|
|
1218 del chunk
|
|
|
1219
|
|
|
1220 for p in (p1, p2):
|
|
|
1221 if not p in self.nodemap:
|
|
|
1222 raise LookupError(p, self.indexfile, _('unknown parent'))
|
|
|
1223
|
|
|
1224 if not chain:
|
|
|
1225 # retrieve the parent revision of the delta chain
|
|
|
1226 chain = p1
|
|
|
1227 if not chain in self.nodemap:
|
|
|
1228 raise LookupError(chain, self.indexfile, _('unknown base'))
|
|
|
1229
|
|
|
1230 # full versions are inserted when the needed deltas become
|
|
|
1231 # comparable to the uncompressed text or when the previous
|
|
|
1232 # version is not the one we have a delta against. We use
|
|
|
1233 # the size of the previous full rev as a proxy for the
|
|
|
1234 # current size.
|
|
|
1235
|
|
|
1236 if chain == prev:
|
|
|
1237 cdelta = compress(delta)
|
|
|
1238 cdeltalen = len(cdelta[0]) + len(cdelta[1])
|
|
|
1239 textlen = mdiff.patchedsize(textlen, delta)
|
|
|
1240
|
|
|
1241 if chain != prev or (end - start + cdeltalen) > textlen * 2:
|
|
|
1242 # flush our writes here so we can read it in revision
|
|
|
1243 if dfh:
|
|
|
1244 dfh.flush()
|
|
|
1245 ifh.flush()
|
|
|
1246 text = self.revision(chain)
|
|
|
1247 if len(text) == 0:
|
|
|
1248 # skip over trivial delta header
|
|
|
1249 text = buffer(delta, 12)
|
|
|
1250 else:
|
|
|
1251 text = mdiff.patches(text, [delta])
|
|
|
1252 del delta
|
|
|
1253 chk = self._addrevision(text, transaction, link, p1, p2, None,
|
|
|
1254 ifh, dfh)
|
|
|
1255 if not dfh and not self._inline:
|
|
|
1256 # addrevision switched from inline to conventional
|
|
|
1257 # reopen the index
|
|
|
1258 dfh = self.opener(self.datafile, "a")
|
|
|
1259 ifh = self.opener(self.indexfile, "a")
|
|
|
1260 if chk != node:
|
|
|
1261 raise RevlogError(_("consistency error adding group"))
|
|
|
1262 textlen = len(text)
|
|
|
1263 else:
|
|
|
1264 e = (offset_type(end, 0), cdeltalen, textlen, base,
|
|
|
1265 link, self.rev(p1), self.rev(p2), node)
|
|
|
1266 self.index.insert(-1, e)
|
|
|
1267 self.nodemap[node] = r
|
|
|
1268 entry = self._io.packentry(e, self.node, self.version, r)
|
|
|
1269 if self._inline:
|
|
|
1270 ifh.write(entry)
|
|
|
1271 ifh.write(cdelta[0])
|
|
|
1272 ifh.write(cdelta[1])
|
|
|
1273 self.checkinlinesize(transaction, ifh)
|
|
|
1274 if not self._inline:
|
|
|
1275 dfh = self.opener(self.datafile, "a")
|
|
|
1276 ifh = self.opener(self.indexfile, "a")
|
|
|
1277 else:
|
|
|
1278 dfh.write(cdelta[0])
|
|
|
1279 dfh.write(cdelta[1])
|
|
|
1280 ifh.write(entry)
|
|
|
1281
|
|
|
1282 t, r, chain, prev = r, r + 1, node, node
|
|
|
1283 base = self.base(t)
|
|
|
1284 start = self.start(base)
|
|
|
1285 end = self.end(t)
|
|
|
1286 finally:
|
|
|
1287 if dfh:
|
|
|
1288 dfh.close()
|
|
|
1289 ifh.close()
|
|
|
1290
|
|
|
1291 return node
|
|
|
1292
|
|
|
1293 def strip(self, minlink, transaction):
|
|
|
1294 """truncate the revlog on the first revision with a linkrev >= minlink
|
|
|
1295
|
|
|
1296 This function is called when we're stripping revision minlink and
|
|
|
1297 its descendants from the repository.
|
|
|
1298
|
|
|
1299 We have to remove all revisions with linkrev >= minlink, because
|
|
|
1300 the equivalent changelog revisions will be renumbered after the
|
|
|
1301 strip.
|
|
|
1302
|
|
|
1303 So we truncate the revlog on the first of these revisions, and
|
|
|
1304 trust that the caller has saved the revisions that shouldn't be
|
|
|
1305 removed and that it'll readd them after this truncation.
|
|
|
1306 """
|
|
|
1307 if len(self) == 0:
|
|
|
1308 return
|
|
|
1309
|
|
|
1310 if isinstance(self.index, lazyindex):
|
|
|
1311 self._loadindexmap()
|
|
|
1312
|
|
|
1313 for rev in self:
|
|
|
1314 if self.index[rev][4] >= minlink:
|
|
|
1315 break
|
|
|
1316 else:
|
|
|
1317 return
|
|
|
1318
|
|
|
1319 # first truncate the files on disk
|
|
|
1320 end = self.start(rev)
|
|
|
1321 if not self._inline:
|
|
|
1322 transaction.add(self.datafile, end)
|
|
|
1323 end = rev * self._io.size
|
|
|
1324 else:
|
|
|
1325 end += rev * self._io.size
|
|
|
1326
|
|
|
1327 transaction.add(self.indexfile, end)
|
|
|
1328
|
|
|
1329 # then reset internal state in memory to forget those revisions
|
|
|
1330 self._cache = None
|
|
|
1331 self._chunkclear()
|
|
|
1332 for x in xrange(rev, len(self)):
|
|
|
1333 del self.nodemap[self.node(x)]
|
|
|
1334
|
|
|
1335 del self.index[rev:-1]
|
|
|
1336
|
|
|
1337 def checksize(self):
|
|
|
1338 expected = 0
|
|
|
1339 if len(self):
|
|
|
1340 expected = max(0, self.end(len(self) - 1))
|
|
|
1341
|
|
|
1342 try:
|
|
|
1343 f = self.opener(self.datafile)
|
|
|
1344 f.seek(0, 2)
|
|
|
1345 actual = f.tell()
|
|
|
1346 dd = actual - expected
|
|
|
1347 except IOError, inst:
|
|
|
1348 if inst.errno != errno.ENOENT:
|
|
|
1349 raise
|
|
|
1350 dd = 0
|
|
|
1351
|
|
|
1352 try:
|
|
|
1353 f = self.opener(self.indexfile)
|
|
|
1354 f.seek(0, 2)
|
|
|
1355 actual = f.tell()
|
|
|
1356 s = self._io.size
|
|
|
1357 i = max(0, actual / s)
|
|
|
1358 di = actual - (i * s)
|
|
|
1359 if self._inline:
|
|
|
1360 databytes = 0
|
|
|
1361 for r in self:
|
|
|
1362 databytes += max(0, self.length(r))
|
|
|
1363 dd = 0
|
|
|
1364 di = actual - len(self) * s - databytes
|
|
|
1365 except IOError, inst:
|
|
|
1366 if inst.errno != errno.ENOENT:
|
|
|
1367 raise
|
|
|
1368 di = 0
|
|
|
1369
|
|
|
1370 return (dd, di)
|
|
|
1371
|
|
|
1372 def files(self):
|
|
|
1373 res = [ self.indexfile ]
|
|
|
1374 if not self._inline:
|
|
|
1375 res.append(self.datafile)
|
|
|
1376 return res
|
