annotate hgext/remotefilelog/remotefilelog.py @ 49043:362312d61020

rust-dirstate-entry: fix typo in panic message Differential Revision: https://phab.mercurial-scm.org/D12446
author Raphaël Gomès <rgomes@octobus.net>
date Mon, 28 Mar 2022 13:01:42 +0200
parents 642e31cb55f0
children 9cac281eb9c0
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1 # remotefilelog.py - filelog implementation where filelog history is stored
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2 # remotely
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3 #
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4 # Copyright 2013 Facebook, Inc.
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5 #
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6 # This software may be used and distributed according to the terms of the
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7 # GNU General Public License version 2 or any later version.
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8
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9 import collections
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10 import os
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11
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12 from mercurial.node import bin
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13 from mercurial.i18n import _
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14 from mercurial import (
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15 ancestor,
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16 error,
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17 mdiff,
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18 revlog,
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19 )
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20 from mercurial.utils import storageutil
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21 from mercurial.revlogutils import flagutil
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22
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23 from . import (
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24 constants,
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25 fileserverclient,
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26 shallowutil,
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27 )
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29
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30 class remotefilelognodemap:
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31 def __init__(self, filename, store):
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32 self._filename = filename
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33 self._store = store
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34
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35 def __contains__(self, node):
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36 missing = self._store.getmissing([(self._filename, node)])
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37 return not bool(missing)
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38
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39 def __get__(self, node):
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40 if node not in self:
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41 raise KeyError(node)
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42 return node
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43
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44
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45 class remotefilelog:
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46
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47 _generaldelta = True
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48 _flagserrorclass = error.RevlogError
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49
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50 def __init__(self, opener, path, repo):
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51 self.opener = opener
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52 self.filename = path
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53 self.repo = repo
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54 self.nodemap = remotefilelognodemap(self.filename, repo.contentstore)
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55
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56 self.version = 1
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57
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58 self._flagprocessors = dict(flagutil.flagprocessors)
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59
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60 def read(self, node):
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61 """returns the file contents at this node"""
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62 t = self.revision(node)
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63 if not t.startswith(b'\1\n'):
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64 return t
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65 s = t.index(b'\1\n', 2)
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66 return t[s + 2 :]
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67
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68 def add(self, text, meta, transaction, linknode, p1=None, p2=None):
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69 # hash with the metadata, like in vanilla filelogs
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70 hashtext = shallowutil.createrevlogtext(
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71 text, meta.get(b'copy'), meta.get(b'copyrev')
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72 )
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73 node = storageutil.hashrevisionsha1(hashtext, p1, p2)
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74 return self.addrevision(
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75 hashtext, transaction, linknode, p1, p2, node=node
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76 )
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77
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78 def _createfileblob(self, text, meta, flags, p1, p2, node, linknode):
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79 # text passed to "_createfileblob" does not include filelog metadata
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80 header = shallowutil.buildfileblobheader(len(text), flags)
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81 data = b"%s\0%s" % (header, text)
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82
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83 realp1 = p1
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84 copyfrom = b""
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85 if meta and b'copy' in meta:
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86 copyfrom = meta[b'copy']
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87 realp1 = bin(meta[b'copyrev'])
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88
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89 data += b"%s%s%s%s%s\0" % (node, realp1, p2, linknode, copyfrom)
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90
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91 visited = set()
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92
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93 pancestors = {}
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94 queue = []
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95 if realp1 != self.repo.nullid:
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96 p1flog = self
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97 if copyfrom:
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98 p1flog = remotefilelog(self.opener, copyfrom, self.repo)
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99
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100 pancestors.update(p1flog.ancestormap(realp1))
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101 queue.append(realp1)
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102 visited.add(realp1)
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103 if p2 != self.repo.nullid:
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104 pancestors.update(self.ancestormap(p2))
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105 queue.append(p2)
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106 visited.add(p2)
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107
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108 ancestortext = b""
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109
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110 # add the ancestors in topological order
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111 while queue:
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112 c = queue.pop(0)
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113 pa1, pa2, ancestorlinknode, pacopyfrom = pancestors[c]
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114
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115 pacopyfrom = pacopyfrom or b''
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116 ancestortext += b"%s%s%s%s%s\0" % (
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117 c,
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118 pa1,
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119 pa2,
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120 ancestorlinknode,
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121 pacopyfrom,
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122 )
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123
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124 if pa1 != self.repo.nullid and pa1 not in visited:
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125 queue.append(pa1)
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126 visited.add(pa1)
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127 if pa2 != self.repo.nullid and pa2 not in visited:
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128 queue.append(pa2)
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129 visited.add(pa2)
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130
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131 data += ancestortext
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132
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133 return data
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134
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135 def addrevision(
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136 self,
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137 text,
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138 transaction,
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139 linknode,
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140 p1,
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141 p2,
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142 cachedelta=None,
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143 node=None,
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144 flags=revlog.REVIDX_DEFAULT_FLAGS,
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145 sidedata=None,
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146 ):
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147 # text passed to "addrevision" includes hg filelog metadata header
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148 if node is None:
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149 node = storageutil.hashrevisionsha1(text, p1, p2)
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150
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151 meta, metaoffset = storageutil.parsemeta(text)
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152 rawtext, validatehash = flagutil.processflagswrite(
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153 self,
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154 text,
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155 flags,
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156 )
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157 return self.addrawrevision(
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158 rawtext,
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159 transaction,
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160 linknode,
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161 p1,
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162 p2,
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163 node,
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164 flags,
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165 cachedelta,
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166 _metatuple=(meta, metaoffset),
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167 )
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168
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169 def addrawrevision(
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170 self,
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171 rawtext,
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172 transaction,
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173 linknode,
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174 p1,
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175 p2,
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176 node,
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177 flags,
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178 cachedelta=None,
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179 _metatuple=None,
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180 ):
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181 if _metatuple:
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182 # _metatuple: used by "addrevision" internally by remotefilelog
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183 # meta was parsed confidently
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184 meta, metaoffset = _metatuple
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185 else:
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186 # not from self.addrevision, but something else (repo._filecommit)
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187 # calls addrawrevision directly. remotefilelog needs to get and
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188 # strip filelog metadata.
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189 # we don't have confidence about whether rawtext contains filelog
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190 # metadata or not (flag processor could replace it), so we just
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191 # parse it as best-effort.
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192 # in LFS (flags != 0)'s case, the best way is to call LFS code to
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193 # get the meta information, instead of storageutil.parsemeta.
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194 meta, metaoffset = storageutil.parsemeta(rawtext)
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195 if flags != 0:
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196 # when flags != 0, be conservative and do not mangle rawtext, since
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197 # a read flag processor expects the text not being mangled at all.
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198 metaoffset = 0
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199 if metaoffset:
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200 # remotefilelog fileblob stores copy metadata in its ancestortext,
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201 # not its main blob. so we need to remove filelog metadata
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202 # (containing copy information) from text.
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203 blobtext = rawtext[metaoffset:]
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204 else:
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205 blobtext = rawtext
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206 data = self._createfileblob(
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207 blobtext, meta, flags, p1, p2, node, linknode
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208 )
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209 self.repo.contentstore.addremotefilelognode(self.filename, node, data)
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210
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211 return node
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212
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213 def renamed(self, node):
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214 ancestors = self.repo.metadatastore.getancestors(self.filename, node)
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215 p1, p2, linknode, copyfrom = ancestors[node]
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216 if copyfrom:
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217 return (copyfrom, p1)
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218
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219 return False
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220
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221 def size(self, node):
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222 """return the size of a given revision"""
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223 return len(self.read(node))
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224
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225 rawsize = size
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226
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227 def cmp(self, node, text):
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228 """compare text with a given file revision
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229
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230 returns True if text is different than what is stored.
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231 """
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232
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233 if node == self.repo.nullid:
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234 return True
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235
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236 nodetext = self.read(node)
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237 return nodetext != text
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238
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239 def __nonzero__(self):
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240 return True
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241
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242 __bool__ = __nonzero__
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243
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244 def __len__(self):
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245 if self.filename in (b'.hgtags', b'.hgsub', b'.hgsubstate'):
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246 # Global tag and subrepository support require access to the
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247 # file history for various performance sensitive operations.
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248 # excludepattern should be used for repositories depending on
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249 # those features to fallback to regular filelog.
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250 return 0
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251
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252 raise RuntimeError(b"len not supported")
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253
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254 def heads(self):
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255 # Fake heads of the filelog to satisfy hgweb.
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256 return []
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257
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258 def empty(self):
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259 return False
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260
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diff changeset
261 def flags(self, node):
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262 if isinstance(node, int):
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parents:
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263 raise error.ProgrammingError(
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264 b'remotefilelog does not accept integer rev for flags'
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diff changeset
265 )
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diff changeset
266 store = self.repo.contentstore
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parents:
diff changeset
267 return store.getmeta(self.filename, node).get(constants.METAKEYFLAG, 0)
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268
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269 def parents(self, node):
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270 if node == self.repo.nullid:
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271 return self.repo.nullid, self.repo.nullid
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272
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diff changeset
273 ancestormap = self.repo.metadatastore.getancestors(self.filename, node)
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parents:
diff changeset
274 p1, p2, linknode, copyfrom = ancestormap[node]
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parents:
diff changeset
275 if copyfrom:
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276 p1 = self.repo.nullid
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277
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parents:
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278 return p1, p2
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279
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280 def parentrevs(self, rev):
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parents:
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281 # TODO(augie): this is a node and should be a rev, but for now
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parents:
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282 # nothing in core seems to actually break.
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283 return self.parents(rev)
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284
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parents:
diff changeset
285 def linknode(self, node):
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286 ancestormap = self.repo.metadatastore.getancestors(self.filename, node)
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parents:
diff changeset
287 p1, p2, linknode, copyfrom = ancestormap[node]
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288 return linknode
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289
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290 def linkrev(self, node):
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parents:
diff changeset
291 return self.repo.unfiltered().changelog.rev(self.linknode(node))
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292
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293 def emitrevisions(
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diff changeset
294 self,
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295 nodes,
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296 nodesorder=None,
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297 revisiondata=False,
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298 assumehaveparentrevisions=False,
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299 deltaprevious=False,
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300 deltamode=None,
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301 sidedata_helpers=None,
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302 ):
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parents:
diff changeset
303 # we don't use any of these parameters here
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parents:
diff changeset
304 del nodesorder, revisiondata, assumehaveparentrevisions, deltaprevious
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parents:
diff changeset
305 del deltamode
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parents:
diff changeset
306 prevnode = None
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parents:
diff changeset
307 for node in nodes:
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parents:
diff changeset
308 p1, p2 = self.parents(node)
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parents:
diff changeset
309 if prevnode is None:
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Augie Fackler <augie@google.com>
parents:
diff changeset
310 basenode = prevnode = p1
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parents:
diff changeset
311 if basenode == node:
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312 basenode = self.repo.nullid
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diff changeset
313 if basenode != self.repo.nullid:
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parents:
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314 revision = None
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Augie Fackler <augie@google.com>
parents:
diff changeset
315 delta = self.revdiff(basenode, node)
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parents:
diff changeset
316 else:
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parents: 42725
diff changeset
317 revision = self.rawdata(node)
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318 delta = None
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parents:
diff changeset
319 yield revlog.revlogrevisiondelta(
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parents:
diff changeset
320 node=node,
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Augie Fackler <augie@google.com>
parents:
diff changeset
321 p1node=p1,
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parents:
diff changeset
322 p2node=p2,
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parents:
diff changeset
323 linknode=self.linknode(node),
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parents:
diff changeset
324 basenode=basenode,
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parents:
diff changeset
325 flags=self.flags(node),
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Augie Fackler <augie@google.com>
parents:
diff changeset
326 baserevisionsize=None,
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Augie Fackler <augie@google.com>
parents:
diff changeset
327 revision=revision,
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Augie Fackler <augie@google.com>
parents:
diff changeset
328 delta=delta,
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parents: 46709
diff changeset
329 # Sidedata is not supported yet
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parents: 46709
diff changeset
330 sidedata=None,
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119790e1c67c cg4: introduce protocol flag to signify the presence of sidedata
Raphaël Gomès <rgomes@octobus.net>
parents: 47012
diff changeset
331 # Protocol flags are not used yet
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Raphaël Gomès <rgomes@octobus.net>
parents: 47012
diff changeset
332 protocol_flags=0,
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parents: 42995
diff changeset
333 )
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Augie Fackler <augie@google.com>
parents:
diff changeset
334
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Augie Fackler <augie@google.com>
parents:
diff changeset
335 def revdiff(self, node1, node2):
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diff changeset
336 return mdiff.textdiff(self.rawdata(node1), self.rawdata(node2))
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Augie Fackler <augie@google.com>
parents:
diff changeset
337
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Augie Fackler <augie@google.com>
parents:
diff changeset
338 def lookup(self, node):
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Augie Fackler <augie@google.com>
parents:
diff changeset
339 if len(node) == 40:
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Augie Fackler <augie@google.com>
parents:
diff changeset
340 node = bin(node)
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Augie Fackler <augie@google.com>
parents:
diff changeset
341 if len(node) != 20:
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parents: 42995
diff changeset
342 raise error.LookupError(
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diff changeset
343 node, self.filename, _(b'invalid lookup input')
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diff changeset
344 )
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parents:
diff changeset
345
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
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parents:
diff changeset
346 return node
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parents:
diff changeset
347
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
348 def rev(self, node):
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Augie Fackler <augie@google.com>
parents:
diff changeset
349 # This is a hack to make TortoiseHG work.
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Augie Fackler <augie@google.com>
parents:
diff changeset
350 return node
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Augie Fackler <augie@google.com>
parents:
diff changeset
351
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
352 def node(self, rev):
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Augie Fackler <augie@google.com>
parents:
diff changeset
353 # This is a hack.
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Augie Fackler <augie@google.com>
parents:
diff changeset
354 if isinstance(rev, int):
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Augie Fackler <augie@google.com>
parents:
diff changeset
355 raise error.ProgrammingError(
43077
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diff changeset
356 b'remotefilelog does not convert integer rev to node'
43076
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Augie Fackler <augie@google.com>
parents: 42995
diff changeset
357 )
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parents:
diff changeset
358 return rev
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parents:
diff changeset
359
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Augie Fackler <augie@google.com>
parents:
diff changeset
360 def revision(self, node, raw=False):
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parents:
diff changeset
361 """returns the revlog contents at this node.
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parents:
diff changeset
362 this includes the meta data traditionally included in file revlogs.
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Augie Fackler <augie@google.com>
parents:
diff changeset
363 this is generally only used for bundling and communicating with vanilla
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Augie Fackler <augie@google.com>
parents:
diff changeset
364 hg clients.
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Augie Fackler <augie@google.com>
parents:
diff changeset
365 """
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
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diff changeset
366 if node == self.repo.nullid:
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parents: 43076
diff changeset
367 return b""
40495
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parents:
diff changeset
368 if len(node) != 20:
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parents: 42995
diff changeset
369 raise error.LookupError(
43077
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diff changeset
370 node, self.filename, _(b'invalid revision input')
43076
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parents: 42995
diff changeset
371 )
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
372 if (
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
373 node == self.repo.nodeconstants.wdirid
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Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
374 or node in self.repo.nodeconstants.wdirfilenodeids
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
375 ):
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Augie Fackler <augie@google.com>
parents: 41365
diff changeset
376 raise error.WdirUnsupported
40495
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parents:
diff changeset
377
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Augie Fackler <augie@google.com>
parents:
diff changeset
378 store = self.repo.contentstore
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parents:
diff changeset
379 rawtext = store.get(self.filename, node)
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Augie Fackler <augie@google.com>
parents:
diff changeset
380 if raw:
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Augie Fackler <augie@google.com>
parents:
diff changeset
381 return rawtext
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Augie Fackler <augie@google.com>
parents:
diff changeset
382 flags = store.getmeta(self.filename, node).get(constants.METAKEYFLAG, 0)
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Augie Fackler <augie@google.com>
parents:
diff changeset
383 if flags == 0:
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Augie Fackler <augie@google.com>
parents:
diff changeset
384 return rawtext
42991
eb5048f8c533 flagprocessors: make `processflagsread` a module level function
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42990
diff changeset
385 return flagutil.processflagsread(self, rawtext, flags)[0]
40495
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Augie Fackler <augie@google.com>
parents:
diff changeset
386
42725
7492899c6fc6 rawdata: implement the method for `remotefilelog` too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42095
diff changeset
387 def rawdata(self, node):
7492899c6fc6 rawdata: implement the method for `remotefilelog` too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42095
diff changeset
388 return self.revision(node, raw=False)
7492899c6fc6 rawdata: implement the method for `remotefilelog` too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42095
diff changeset
389
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
390 def _read(self, id):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
391 """reads the raw file blob from disk, cache, or server"""
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
392 fileservice = self.repo.fileservice
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
393 localcache = fileservice.localcache
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42995
diff changeset
394 cachekey = fileserverclient.getcachekey(
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42995
diff changeset
395 self.repo.name, self.filename, id
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42995
diff changeset
396 )
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
397 try:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
398 return localcache.read(cachekey)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
399 except KeyError:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
400 pass
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
401
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
402 localkey = fileserverclient.getlocalkey(self.filename, id)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
403 localpath = os.path.join(self.localpath, localkey)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
404 try:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
405 return shallowutil.readfile(localpath)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
406 except IOError:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
407 pass
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
408
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
409 fileservice.prefetch([(self.filename, id)])
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
410 try:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
411 return localcache.read(cachekey)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
412 except KeyError:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
413 pass
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
414
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
415 raise error.LookupError(id, self.filename, _(b'no node'))
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
416
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
417 def ancestormap(self, node):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
418 return self.repo.metadatastore.getancestors(self.filename, node)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
419
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
420 def ancestor(self, a, b):
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
421 if a == self.repo.nullid or b == self.repo.nullid:
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
422 return self.repo.nullid
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
423
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
424 revmap, parentfunc = self._buildrevgraph(a, b)
48913
f254fc73d956 global: bulk replace simple pycompat.iteritems(x) with x.items()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48875
diff changeset
425 nodemap = {v: k for (k, v) in revmap.items()}
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
426
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
427 ancs = ancestor.ancestors(parentfunc, revmap[a], revmap[b])
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
428 if ancs:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
429 # choose a consistent winner when there's a tie
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
430 return min(map(nodemap.__getitem__, ancs))
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
431 return self.repo.nullid
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
432
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
433 def commonancestorsheads(self, a, b):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
434 """calculate all the heads of the common ancestors of nodes a and b"""
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
435
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
436 if a == self.repo.nullid or b == self.repo.nullid:
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
437 return self.repo.nullid
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
438
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
439 revmap, parentfunc = self._buildrevgraph(a, b)
48913
f254fc73d956 global: bulk replace simple pycompat.iteritems(x) with x.items()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48875
diff changeset
440 nodemap = {v: k for (k, v) in revmap.items()}
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
441
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
442 ancs = ancestor.commonancestorsheads(parentfunc, revmap[a], revmap[b])
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
443 return map(nodemap.__getitem__, ancs)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
444
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
445 def _buildrevgraph(self, a, b):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
446 """Builds a numeric revision graph for the given two nodes.
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
447 Returns a node->rev map and a rev->[revs] parent function.
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
448 """
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
449 amap = self.ancestormap(a)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
450 bmap = self.ancestormap(b)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
451
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
452 # Union the two maps
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
453 parentsmap = collections.defaultdict(list)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
454 allparents = set()
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
455 for mapping in (amap, bmap):
48913
f254fc73d956 global: bulk replace simple pycompat.iteritems(x) with x.items()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48875
diff changeset
456 for node, pdata in mapping.items():
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
457 parents = parentsmap[node]
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
458 p1, p2, linknode, copyfrom = pdata
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
459 # Don't follow renames (copyfrom).
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
460 # remotefilectx.ancestor does that.
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
461 if p1 != self.repo.nullid and not copyfrom:
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
462 parents.append(p1)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
463 allparents.add(p1)
47012
d55b71393907 node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents: 46711
diff changeset
464 if p2 != self.repo.nullid:
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
465 parents.append(p2)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
466 allparents.add(p2)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
467
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
468 # Breadth first traversal to build linkrev graph
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
469 parentrevs = collections.defaultdict(list)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
470 revmap = {}
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42995
diff changeset
471 queue = collections.deque(
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42995
diff changeset
472 ((None, n) for n in parentsmap if n not in allparents)
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42995
diff changeset
473 )
40495
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
474 while queue:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
475 prevrev, current = queue.pop()
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
476 if current in revmap:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
477 if prevrev:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
478 parentrevs[prevrev].append(revmap[current])
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
479 continue
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
480
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
481 # Assign linkrevs in reverse order, so start at
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
482 # len(parentsmap) and work backwards.
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
483 currentrev = len(parentsmap) - len(revmap) - 1
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
484 revmap[current] = currentrev
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
485
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
486 if prevrev:
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
487 parentrevs[prevrev].append(currentrev)
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
488
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
489 for parent in parentsmap.get(current):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
490 queue.appendleft((currentrev, parent))
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
491
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
492 return revmap, parentrevs.__getitem__
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
493
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
494 def strip(self, minlink, transaction):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
495 pass
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
496
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
497 # misc unused things
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
498 def files(self):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
499 return []
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
500
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
501 def checksize(self):
3a333a582d7b remotefilelog: import pruned-down remotefilelog extension from hg-experimental
Augie Fackler <augie@google.com>
parents:
diff changeset
502 return 0, 0