Mercurial > hg
annotate tests/simplestorerepo.py @ 37442:0596d27457c6
revlog: move parsemeta() and packmeta() from filelog (API)
filelog.parsemeta() and filelog.packmeta() are used to decode
and encode metadata for file copies and censor.
An upcoming commit will move the core logic for censoring revlogs
into revlog.py. This would create a cycle between revlog.py and
filelog.py. So we move these metadata functions to revlog.py.
.. api::
filelog.parsemeta() and filelog.packmeta() have been moved to
the revlog module.
Differential Revision: https://phab.mercurial-scm.org/D3150
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Thu, 05 Apr 2018 18:22:35 -0700 |
parents | a3202fa83aff |
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1 # simplestorerepo.py - Extension that swaps in alternate repository storage. |
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2 # |
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3 # Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 # To use this with the test suite: |
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9 # |
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10 # $ HGREPOFEATURES="simplestore" ./run-tests.py \ |
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11 # --extra-config-opt extensions.simplestore=`pwd`/simplestorerepo.py |
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12 |
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13 from __future__ import absolute_import |
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14 |
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15 import stat |
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16 |
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17 from mercurial.i18n import _ |
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18 from mercurial.node import ( |
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19 bin, |
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20 hex, |
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21 nullid, |
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22 nullrev, |
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23 ) |
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24 from mercurial.thirdparty import ( |
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25 cbor, |
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26 ) |
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27 from mercurial.thirdparty.zope import ( |
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28 interface as zi, |
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29 ) |
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30 from mercurial import ( |
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31 ancestor, |
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32 bundlerepo, |
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33 error, |
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34 extensions, |
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35 localrepo, |
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36 mdiff, |
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37 pycompat, |
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38 repository, |
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39 revlog, |
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40 store, |
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41 verify, |
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42 ) |
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43 |
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44 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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45 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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46 # be specifying the version(s) of Mercurial they are tested with, or |
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47 # leave the attribute unspecified. |
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48 testedwith = 'ships-with-hg-core' |
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49 |
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50 REQUIREMENT = 'testonly-simplestore' |
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51 |
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52 def validatenode(node): |
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53 if isinstance(node, int): |
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54 raise ValueError('expected node; got int') |
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55 |
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56 if len(node) != 20: |
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57 raise ValueError('expected 20 byte node') |
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58 |
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59 def validaterev(rev): |
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60 if not isinstance(rev, int): |
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61 raise ValueError('expected int') |
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62 |
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63 @zi.implementer(repository.ifilestorage) |
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64 class filestorage(object): |
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65 """Implements storage for a tracked path. |
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66 |
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67 Data is stored in the VFS in a directory corresponding to the tracked |
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68 path. |
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69 |
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70 Index data is stored in an ``index`` file using CBOR. |
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71 |
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72 Fulltext data is stored in files having names of the node. |
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73 """ |
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74 |
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75 def __init__(self, svfs, path): |
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76 self._svfs = svfs |
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77 self._path = path |
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78 |
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79 self._storepath = b'/'.join([b'data', path]) |
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80 self._indexpath = b'/'.join([self._storepath, b'index']) |
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81 |
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82 indexdata = self._svfs.tryread(self._indexpath) |
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83 if indexdata: |
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84 indexdata = cbor.loads(indexdata) |
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85 |
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86 self._indexdata = indexdata or [] |
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87 self._indexbynode = {} |
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88 self._indexbyrev = {} |
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89 self.index = [] |
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90 self._refreshindex() |
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91 |
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92 # This is used by changegroup code :/ |
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93 self._generaldelta = True |
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94 self.storedeltachains = False |
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95 |
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96 self.version = 1 |
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97 |
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98 def _refreshindex(self): |
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99 self._indexbynode.clear() |
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100 self._indexbyrev.clear() |
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101 self.index = [] |
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102 |
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103 for i, entry in enumerate(self._indexdata): |
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104 self._indexbynode[entry[b'node']] = entry |
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105 self._indexbyrev[i] = entry |
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106 |
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107 self._indexbynode[nullid] = { |
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108 b'node': nullid, |
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109 b'p1': nullid, |
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110 b'p2': nullid, |
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111 b'linkrev': nullrev, |
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112 b'flags': 0, |
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113 } |
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114 |
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115 self._indexbyrev[nullrev] = { |
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116 b'node': nullid, |
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117 b'p1': nullid, |
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118 b'p2': nullid, |
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119 b'linkrev': nullrev, |
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120 b'flags': 0, |
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121 } |
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122 |
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123 for i, entry in enumerate(self._indexdata): |
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124 p1rev, p2rev = self.parentrevs(self.rev(entry[b'node'])) |
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125 |
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126 # start, length, rawsize, chainbase, linkrev, p1, p2, node |
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127 self.index.append((0, 0, 0, -1, entry[b'linkrev'], p1rev, p2rev, |
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128 entry[b'node'])) |
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129 |
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130 self.index.append((0, 0, 0, -1, -1, -1, -1, nullid)) |
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131 |
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132 def __len__(self): |
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133 return len(self._indexdata) |
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134 |
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135 def __iter__(self): |
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136 return iter(range(len(self))) |
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137 |
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138 def revs(self, start=0, stop=None): |
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139 step = 1 |
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140 if stop is not None: |
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141 if start > stop: |
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142 step = -1 |
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143 |
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144 stop += step |
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145 else: |
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146 stop = len(self) |
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147 |
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148 return range(start, stop, step) |
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149 |
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150 def parents(self, node): |
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151 validatenode(node) |
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152 |
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153 if node not in self._indexbynode: |
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154 raise KeyError('unknown node') |
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155 |
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156 entry = self._indexbynode[node] |
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157 |
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158 return entry[b'p1'], entry[b'p2'] |
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159 |
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160 def parentrevs(self, rev): |
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161 p1, p2 = self.parents(self._indexbyrev[rev][b'node']) |
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162 return self.rev(p1), self.rev(p2) |
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163 |
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164 def rev(self, node): |
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165 validatenode(node) |
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166 |
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167 try: |
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168 self._indexbynode[node] |
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169 except KeyError: |
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170 raise error.LookupError(node, self._indexpath, _('no node')) |
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171 |
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172 for rev, entry in self._indexbyrev.items(): |
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173 if entry[b'node'] == node: |
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174 return rev |
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175 |
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176 raise error.ProgrammingError('this should not occur') |
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177 |
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178 def node(self, rev): |
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179 validaterev(rev) |
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180 |
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181 return self._indexbyrev[rev][b'node'] |
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182 |
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183 def lookup(self, node): |
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184 if isinstance(node, int): |
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185 return self.node(node) |
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186 |
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187 if len(node) == 20: |
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188 self.rev(node) |
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189 return node |
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190 |
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191 try: |
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192 rev = int(node) |
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193 if '%d' % rev != node: |
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194 raise ValueError |
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195 |
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196 if rev < 0: |
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197 rev = len(self) + rev |
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198 if rev < 0 or rev >= len(self): |
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199 raise ValueError |
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200 |
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201 return self.node(rev) |
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202 except (ValueError, OverflowError): |
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203 pass |
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204 |
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205 if len(node) == 40: |
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206 try: |
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207 rawnode = bin(node) |
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208 self.rev(rawnode) |
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209 return rawnode |
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210 except TypeError: |
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211 pass |
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212 |
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213 raise error.LookupError(node, self._path, _('invalid lookup input')) |
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214 |
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215 def linkrev(self, rev): |
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216 validaterev(rev) |
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217 |
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218 return self._indexbyrev[rev][b'linkrev'] |
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219 |
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220 def flags(self, rev): |
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221 validaterev(rev) |
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222 |
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223 return self._indexbyrev[rev][b'flags'] |
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224 |
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225 def deltaparent(self, rev): |
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226 validaterev(rev) |
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227 |
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228 p1node = self.parents(self.node(rev))[0] |
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229 return self.rev(p1node) |
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230 |
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231 def candelta(self, baserev, rev): |
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232 validaterev(baserev) |
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233 validaterev(rev) |
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234 |
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235 if ((self.flags(baserev) & revlog.REVIDX_RAWTEXT_CHANGING_FLAGS) |
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236 or (self.flags(rev) & revlog.REVIDX_RAWTEXT_CHANGING_FLAGS)): |
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237 return False |
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238 |
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239 return True |
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240 |
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241 def rawsize(self, rev): |
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242 validaterev(rev) |
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243 node = self.node(rev) |
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244 return len(self.revision(node, raw=True)) |
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245 |
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246 def _processflags(self, text, flags, operation, raw=False): |
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247 if flags == 0: |
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248 return text, True |
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249 |
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|
250 if flags & ~revlog.REVIDX_KNOWN_FLAGS: |
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251 raise error.RevlogError(_("incompatible revision flag '%#x'") % |
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252 (flags & ~revlog.REVIDX_KNOWN_FLAGS)) |
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253 |
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254 validatehash = True |
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255 # Depending on the operation (read or write), the order might be |
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256 # reversed due to non-commutative transforms. |
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257 orderedflags = revlog.REVIDX_FLAGS_ORDER |
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258 if operation == 'write': |
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259 orderedflags = reversed(orderedflags) |
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260 |
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261 for flag in orderedflags: |
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262 # If a flagprocessor has been registered for a known flag, apply the |
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263 # related operation transform and update result tuple. |
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264 if flag & flags: |
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265 vhash = True |
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266 |
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267 if flag not in revlog._flagprocessors: |
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268 message = _("missing processor for flag '%#x'") % (flag) |
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269 raise revlog.RevlogError(message) |
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270 |
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271 processor = revlog._flagprocessors[flag] |
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272 if processor is not None: |
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273 readtransform, writetransform, rawtransform = processor |
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274 |
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275 if raw: |
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276 vhash = rawtransform(self, text) |
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277 elif operation == 'read': |
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278 text, vhash = readtransform(self, text) |
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279 else: # write operation |
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280 text, vhash = writetransform(self, text) |
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281 validatehash = validatehash and vhash |
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282 |
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283 return text, validatehash |
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284 |
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285 def checkhash(self, text, node, p1=None, p2=None, rev=None): |
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286 if p1 is None and p2 is None: |
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287 p1, p2 = self.parents(node) |
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288 if node != revlog.hash(text, p1, p2): |
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289 raise error.RevlogError(_("integrity check failed on %s") % |
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290 self._path) |
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291 |
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292 def revision(self, node, raw=False): |
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293 validatenode(node) |
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294 |
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295 if node == nullid: |
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296 return b'' |
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297 |
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298 rev = self.rev(node) |
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299 flags = self.flags(rev) |
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300 |
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301 path = b'/'.join([self._storepath, hex(node)]) |
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302 rawtext = self._svfs.read(path) |
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303 |
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304 text, validatehash = self._processflags(rawtext, flags, 'read', raw=raw) |
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305 if validatehash: |
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306 self.checkhash(text, node, rev=rev) |
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307 |
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308 return text |
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309 |
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310 def read(self, node): |
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311 validatenode(node) |
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312 |
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313 revision = self.revision(node) |
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314 |
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315 if not revision.startswith(b'\1\n'): |
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316 return revision |
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317 |
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318 start = revision.index(b'\1\n', 2) |
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319 return revision[start + 2:] |
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320 |
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321 def renamed(self, node): |
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322 validatenode(node) |
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323 |
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324 if self.parents(node)[0] != nullid: |
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325 return False |
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326 |
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327 fulltext = self.revision(node) |
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328 m = revlog.parsemeta(fulltext)[0] |
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329 |
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330 if m and 'copy' in m: |
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331 return m['copy'], bin(m['copyrev']) |
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332 |
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333 return False |
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334 |
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335 def cmp(self, node, text): |
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336 validatenode(node) |
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337 |
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338 t = text |
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339 |
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340 if text.startswith(b'\1\n'): |
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341 t = b'\1\n\1\n' + text |
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342 |
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343 p1, p2 = self.parents(node) |
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344 |
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345 if revlog.hash(t, p1, p2) == node: |
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346 return False |
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347 |
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348 if self.iscensored(self.rev(node)): |
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349 return text != b'' |
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350 |
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351 if self.renamed(node): |
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352 t2 = self.read(node) |
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353 return t2 != text |
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354 |
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355 return True |
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356 |
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357 def size(self, rev): |
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358 validaterev(rev) |
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359 |
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360 node = self._indexbyrev[rev][b'node'] |
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361 |
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362 if self.renamed(node): |
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363 return len(self.read(node)) |
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364 |
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365 if self.iscensored(rev): |
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366 return 0 |
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367 |
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368 return len(self.revision(node)) |
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369 |
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370 def iscensored(self, rev): |
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371 validaterev(rev) |
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372 |
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373 return self.flags(rev) & revlog.REVIDX_ISCENSORED |
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374 |
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375 def commonancestorsheads(self, a, b): |
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376 validatenode(a) |
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377 validatenode(b) |
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378 |
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379 a = self.rev(a) |
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380 b = self.rev(b) |
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381 |
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382 ancestors = ancestor.commonancestorsheads(self.parentrevs, a, b) |
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383 return pycompat.maplist(self.node, ancestors) |
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384 |
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385 def descendants(self, revs): |
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386 # This is a copy of revlog.descendants() |
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387 first = min(revs) |
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388 if first == nullrev: |
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389 for i in self: |
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390 yield i |
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391 return |
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392 |
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393 seen = set(revs) |
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394 for i in self.revs(start=first + 1): |
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395 for x in self.parentrevs(i): |
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396 if x != nullrev and x in seen: |
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397 seen.add(i) |
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398 yield i |
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399 break |
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400 |
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401 # Required by verify. |
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402 def files(self): |
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403 entries = self._svfs.listdir(self._storepath) |
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404 |
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405 # Strip out undo.backup.* files created as part of transaction |
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406 # recording. |
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407 entries = [f for f in entries if not f.startswith('undo.backup.')] |
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408 |
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409 return [b'/'.join((self._storepath, f)) for f in entries] |
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410 |
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411 # Required by verify. |
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412 def checksize(self): |
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413 return 0, 0 |
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414 |
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415 def add(self, text, meta, transaction, linkrev, p1, p2): |
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416 if meta or text.startswith(b'\1\n'): |
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417 text = revlog.packmeta(meta, text) |
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418 |
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419 return self.addrevision(text, transaction, linkrev, p1, p2) |
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420 |
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421 def addrevision(self, text, transaction, linkrev, p1, p2, node=None, |
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422 flags=revlog.REVIDX_DEFAULT_FLAGS, cachedelta=None): |
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423 validatenode(p1) |
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424 validatenode(p2) |
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425 |
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426 if flags: |
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427 node = node or revlog.hash(text, p1, p2) |
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428 |
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429 rawtext, validatehash = self._processflags(text, flags, 'write') |
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430 |
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431 node = node or revlog.hash(text, p1, p2) |
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432 |
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433 if node in self._indexbynode: |
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434 return node |
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435 |
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436 if validatehash: |
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437 self.checkhash(rawtext, node, p1=p1, p2=p2) |
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438 |
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439 return self._addrawrevision(node, rawtext, transaction, linkrev, p1, p2, |
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|
440 flags) |
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441 |
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442 def _addrawrevision(self, node, rawtext, transaction, link, p1, p2, flags): |
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443 transaction.addbackup(self._indexpath) |
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444 |
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445 path = b'/'.join([self._storepath, hex(node)]) |
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446 |
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447 self._svfs.write(path, rawtext) |
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448 |
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449 self._indexdata.append({ |
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450 b'node': node, |
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451 b'p1': p1, |
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452 b'p2': p2, |
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453 b'linkrev': link, |
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454 b'flags': flags, |
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455 }) |
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456 |
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457 self._reflectindexupdate() |
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458 |
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459 return node |
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460 |
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461 def _reflectindexupdate(self): |
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462 self._refreshindex() |
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463 self._svfs.write(self._indexpath, cbor.dumps(self._indexdata)) |
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464 |
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465 def addgroup(self, deltas, linkmapper, transaction, addrevisioncb=None): |
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466 nodes = [] |
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467 |
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468 transaction.addbackup(self._indexpath) |
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469 |
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470 for node, p1, p2, linknode, deltabase, delta, flags in deltas: |
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471 linkrev = linkmapper(linknode) |
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472 flags = flags or revlog.REVIDX_DEFAULT_FLAGS |
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473 |
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474 nodes.append(node) |
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475 |
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476 if node in self._indexbynode: |
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|
477 continue |
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478 |
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479 # Need to resolve the fulltext from the delta base. |
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480 if deltabase == nullid: |
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481 text = mdiff.patch(b'', delta) |
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482 else: |
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483 text = mdiff.patch(self.revision(deltabase), delta) |
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|
484 |
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485 self._addrawrevision(node, text, transaction, linkrev, p1, p2, |
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|
486 flags) |
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|
487 |
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|
488 if addrevisioncb: |
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489 addrevisioncb(self, node) |
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|
490 |
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491 return nodes |
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|
492 |
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493 def revdiff(self, rev1, rev2): |
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494 validaterev(rev1) |
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495 validaterev(rev2) |
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|
496 |
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497 node1 = self.node(rev1) |
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498 node2 = self.node(rev2) |
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|
499 |
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500 return mdiff.textdiff(self.revision(node1, raw=True), |
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501 self.revision(node2, raw=True)) |
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|
502 |
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503 def headrevs(self): |
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parents:
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|
504 # Assume all revisions are heads by default. |
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505 revishead = {rev: True for rev in self._indexbyrev} |
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506 |
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507 for rev, entry in self._indexbyrev.items(): |
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508 # Unset head flag for all seen parents. |
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509 revishead[self.rev(entry[b'p1'])] = False |
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510 revishead[self.rev(entry[b'p2'])] = False |
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511 |
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512 return [rev for rev, ishead in sorted(revishead.items()) |
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513 if ishead] |
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514 |
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515 def heads(self, start=None, stop=None): |
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516 # This is copied from revlog.py. |
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517 if start is None and stop is None: |
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518 if not len(self): |
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519 return [nullid] |
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520 return [self.node(r) for r in self.headrevs()] |
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521 |
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522 if start is None: |
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523 start = nullid |
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524 if stop is None: |
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525 stop = [] |
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526 stoprevs = set([self.rev(n) for n in stop]) |
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527 startrev = self.rev(start) |
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parents:
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528 reachable = {startrev} |
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529 heads = {startrev} |
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530 |
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531 parentrevs = self.parentrevs |
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parents:
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532 for r in self.revs(start=startrev + 1): |
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533 for p in parentrevs(r): |
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534 if p in reachable: |
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535 if r not in stoprevs: |
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536 reachable.add(r) |
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537 heads.add(r) |
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538 if p in heads and p not in stoprevs: |
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539 heads.remove(p) |
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|
540 |
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541 return [self.node(r) for r in heads] |
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542 |
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543 def children(self, node): |
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parents:
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544 validatenode(node) |
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545 |
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546 # This is a copy of revlog.children(). |
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547 c = [] |
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548 p = self.rev(node) |
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549 for r in self.revs(start=p + 1): |
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550 prevs = [pr for pr in self.parentrevs(r) if pr != nullrev] |
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parents:
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551 if prevs: |
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diff
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|
552 for pr in prevs: |
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parents:
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553 if pr == p: |
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|
554 c.append(self.node(r)) |
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parents:
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555 elif p == nullrev: |
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parents:
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556 c.append(self.node(r)) |
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557 return c |
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558 |
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559 def getstrippoint(self, minlink): |
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560 |
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561 # This is largely a copy of revlog.getstrippoint(). |
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562 brokenrevs = set() |
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diff
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|
563 strippoint = len(self) |
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564 |
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parents:
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565 heads = {} |
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parents:
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|
566 futurelargelinkrevs = set() |
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567 for head in self.headrevs(): |
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568 headlinkrev = self.linkrev(head) |
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569 heads[head] = headlinkrev |
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570 if headlinkrev >= minlink: |
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parents:
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571 futurelargelinkrevs.add(headlinkrev) |
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|
572 |
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573 # This algorithm involves walking down the rev graph, starting at the |
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parents:
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574 # heads. Since the revs are topologically sorted according to linkrev, |
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parents:
diff
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|
575 # once all head linkrevs are below the minlink, we know there are |
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parents:
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576 # no more revs that could have a linkrev greater than minlink. |
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parents:
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577 # So we can stop walking. |
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|
578 while futurelargelinkrevs: |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
579 strippoint -= 1 |
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|
580 linkrev = heads.pop(strippoint) |
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parents:
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|
581 |
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|
582 if linkrev < minlink: |
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|
583 brokenrevs.add(strippoint) |
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diff
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|
584 else: |
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parents:
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changeset
|
585 futurelargelinkrevs.remove(linkrev) |
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parents:
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|
586 |
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parents:
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changeset
|
587 for p in self.parentrevs(strippoint): |
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parents:
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588 if p != nullrev: |
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|
589 plinkrev = self.linkrev(p) |
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590 heads[p] = plinkrev |
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|
591 if plinkrev >= minlink: |
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parents:
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changeset
|
592 futurelargelinkrevs.add(plinkrev) |
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parents:
diff
changeset
|
593 |
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parents:
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changeset
|
594 return strippoint, brokenrevs |
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parents:
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|
595 |
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parents:
diff
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|
596 def strip(self, minlink, transaction): |
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parents:
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changeset
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597 if not len(self): |
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598 return |
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599 |
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600 rev, _ignored = self.getstrippoint(minlink) |
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|
601 if rev == len(self): |
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|
602 return |
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|
603 |
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604 # Purge index data starting at the requested revision. |
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605 self._indexdata[rev:] = [] |
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parents:
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|
606 self._reflectindexupdate() |
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parents:
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|
607 |
37415
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608 def issimplestorefile(f, kind, st): |
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609 if kind != stat.S_IFREG: |
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610 return False |
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611 |
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|
612 if store.isrevlog(f, kind, st): |
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613 return False |
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|
614 |
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|
615 # Ignore transaction undo files. |
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616 if f.startswith('undo.'): |
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617 return False |
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618 |
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|
619 # Otherwise assume it belongs to the simple store. |
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620 return True |
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621 |
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622 class simplestore(store.encodedstore): |
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623 def datafiles(self): |
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624 for x in super(simplestore, self).datafiles(): |
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625 yield x |
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626 |
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627 # Supplement with non-revlog files. |
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628 extrafiles = self._walk('data', True, filefilter=issimplestorefile) |
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629 |
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630 for unencoded, encoded, size in extrafiles: |
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631 try: |
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632 unencoded = store.decodefilename(unencoded) |
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633 except KeyError: |
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634 unencoded = None |
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635 |
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636 yield unencoded, encoded, size |
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637 |
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638 def reposetup(ui, repo): |
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639 if not repo.local(): |
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640 return |
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641 |
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642 if isinstance(repo, bundlerepo.bundlerepository): |
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643 raise error.Abort(_('cannot use simple store with bundlerepo')) |
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644 |
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645 class simplestorerepo(repo.__class__): |
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646 def file(self, f): |
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647 return filestorage(self.svfs, f) |
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648 |
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649 repo.__class__ = simplestorerepo |
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650 |
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651 def featuresetup(ui, supported): |
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652 supported.add(REQUIREMENT) |
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653 |
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654 def newreporequirements(orig, repo): |
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655 """Modifies default requirements for new repos to use the simple store.""" |
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656 requirements = orig(repo) |
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657 |
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658 # These requirements are only used to affect creation of the store |
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659 # object. We have our own store. So we can remove them. |
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660 # TODO do this once we feel like taking the test hit. |
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661 #if 'fncache' in requirements: |
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662 # requirements.remove('fncache') |
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663 #if 'dotencode' in requirements: |
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664 # requirements.remove('dotencode') |
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665 |
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666 requirements.add(REQUIREMENT) |
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667 |
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668 return requirements |
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669 |
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670 def makestore(orig, requirements, path, vfstype): |
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671 if REQUIREMENT not in requirements: |
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672 return orig(requirements, path, vfstype) |
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673 |
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674 return simplestore(path, vfstype) |
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675 |
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676 def verifierinit(orig, self, *args, **kwargs): |
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677 orig(self, *args, **kwargs) |
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678 |
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679 # We don't care that files in the store don't align with what is |
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680 # advertised. So suppress these warnings. |
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681 self.warnorphanstorefiles = False |
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682 |
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683 def extsetup(ui): |
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684 localrepo.featuresetupfuncs.add(featuresetup) |
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685 |
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686 extensions.wrapfunction(localrepo, 'newreporequirements', |
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687 newreporequirements) |
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688 extensions.wrapfunction(store, 'store', makestore) |
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689 extensions.wrapfunction(verify.verifier, '__init__', verifierinit) |