Mercurial > hg
annotate mercurial/filelog.py @ 50757:19108906abaf stable
extensions: imp module is removed in Python 3.12 - use importlib to load files
imp has been deprecated for a long time, and has finally been removed in Python
3.12 .
imp was only used for loading extensions that has been specified with direct
.py path or path to a package directory. The same use cases can be achieved
quite simple with importlib, , possiby with small changes in corner cases with
undefined behaviour, such as extensions without .py source.
There might also be corner cases and undefined behaviour around use of
sys.modules and reloading.
author | Mads Kiilerich <mads@kiilerich.com> |
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date | Wed, 28 Jun 2023 14:23:13 +0200 |
parents | 32837c7e2e4b |
children | 33d2f0164d0d |
rev | line source |
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1089 | 1 # filelog.py - file history class for mercurial |
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2 # |
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3 # Copyright 2005-2007 Olivia Mackall <olivia@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 |
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9 from .i18n import _ |
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10 from .node import nullrev |
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11 from . import ( |
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12 error, |
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13 revlog, |
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14 ) |
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15 from .interfaces import ( |
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16 repository, |
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17 util as interfaceutil, |
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18 ) |
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19 from .utils import storageutil |
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20 from .revlogutils import ( |
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21 constants as revlog_constants, |
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22 rewrite, |
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23 ) |
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24 |
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25 |
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26 @interfaceutil.implementer(repository.ifilestorage) |
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27 class filelog: |
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28 def __init__(self, opener, path, try_split=False): |
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29 self._revlog = revlog.revlog( |
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30 opener, |
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31 # XXX should use the unencoded path |
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32 target=(revlog_constants.KIND_FILELOG, path), |
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33 radix=b'/'.join((b'data', path)), |
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34 censorable=True, |
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35 canonical_parent_order=False, # see comment in revlog.py |
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36 try_split=try_split, |
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37 ) |
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38 # Full name of the user visible file, relative to the repository root. |
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39 # Used by LFS. |
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40 self._revlog.filename = path |
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41 self.nullid = self._revlog.nullid |
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42 opts = opener.options |
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43 self._fix_issue6528 = opts.get(b'issue6528.fix-incoming', True) |
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44 |
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45 def get_revlog(self): |
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46 """return an actual revlog instance if any |
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47 |
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48 This exist because a lot of code leverage the fact the underlying |
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49 storage is a revlog for optimization, so giving simple way to access |
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50 the revlog instance helps such code. |
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51 """ |
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52 return self._revlog |
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53 |
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54 def __len__(self): |
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55 return len(self._revlog) |
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56 |
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57 def __iter__(self): |
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58 return self._revlog.__iter__() |
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59 |
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60 def hasnode(self, node): |
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61 if node in (self.nullid, nullrev): |
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62 return False |
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63 |
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64 try: |
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65 self._revlog.rev(node) |
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66 return True |
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67 except (TypeError, ValueError, IndexError, error.LookupError): |
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68 return False |
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69 |
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70 def revs(self, start=0, stop=None): |
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71 return self._revlog.revs(start=start, stop=stop) |
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72 |
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73 def parents(self, node): |
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74 return self._revlog.parents(node) |
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75 |
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76 def parentrevs(self, rev): |
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77 return self._revlog.parentrevs(rev) |
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78 |
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79 def rev(self, node): |
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80 return self._revlog.rev(node) |
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81 |
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82 def node(self, rev): |
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83 return self._revlog.node(rev) |
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84 |
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85 def lookup(self, node): |
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86 return storageutil.fileidlookup( |
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87 self._revlog, node, self._revlog.display_id |
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88 ) |
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89 |
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90 def linkrev(self, rev): |
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91 return self._revlog.linkrev(rev) |
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92 |
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93 def commonancestorsheads(self, node1, node2): |
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94 return self._revlog.commonancestorsheads(node1, node2) |
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95 |
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96 # Used by dagop.blockdescendants(). |
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97 def descendants(self, revs): |
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98 return self._revlog.descendants(revs) |
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99 |
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100 def heads(self, start=None, stop=None): |
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101 return self._revlog.heads(start, stop) |
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102 |
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103 # Used by hgweb, children extension. |
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104 def children(self, node): |
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105 return self._revlog.children(node) |
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106 |
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107 def iscensored(self, rev): |
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108 return self._revlog.iscensored(rev) |
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109 |
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110 def revision(self, node, _df=None): |
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111 return self._revlog.revision(node, _df=_df) |
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112 |
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113 def rawdata(self, node, _df=None): |
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114 return self._revlog.rawdata(node, _df=_df) |
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115 |
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116 def emitrevisions( |
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117 self, |
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118 nodes, |
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119 nodesorder=None, |
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120 revisiondata=False, |
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121 assumehaveparentrevisions=False, |
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122 deltamode=repository.CG_DELTAMODE_STD, |
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123 sidedata_helpers=None, |
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124 debug_info=None, |
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125 ): |
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126 return self._revlog.emitrevisions( |
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127 nodes, |
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128 nodesorder=nodesorder, |
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129 revisiondata=revisiondata, |
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130 assumehaveparentrevisions=assumehaveparentrevisions, |
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131 deltamode=deltamode, |
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132 sidedata_helpers=sidedata_helpers, |
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133 debug_info=debug_info, |
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134 ) |
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135 |
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136 def addrevision( |
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137 self, |
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138 revisiondata, |
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139 transaction, |
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140 linkrev, |
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141 p1, |
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142 p2, |
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143 node=None, |
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144 flags=revlog.REVIDX_DEFAULT_FLAGS, |
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145 cachedelta=None, |
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146 ): |
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147 return self._revlog.addrevision( |
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148 revisiondata, |
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149 transaction, |
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150 linkrev, |
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151 p1, |
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152 p2, |
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153 node=node, |
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154 flags=flags, |
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155 cachedelta=cachedelta, |
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156 ) |
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157 |
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158 def addgroup( |
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159 self, |
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160 deltas, |
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161 linkmapper, |
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162 transaction, |
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163 addrevisioncb=None, |
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164 duplicaterevisioncb=None, |
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165 maybemissingparents=False, |
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166 debug_info=None, |
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167 delta_base_reuse_policy=None, |
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168 ): |
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169 if maybemissingparents: |
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170 raise error.Abort( |
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171 _( |
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172 b'revlog storage does not support missing ' |
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173 b'parents write mode' |
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174 ) |
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175 ) |
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176 |
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177 with self._revlog._writing(transaction): |
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178 |
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179 if self._fix_issue6528: |
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180 deltas = rewrite.filter_delta_issue6528(self._revlog, deltas) |
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181 |
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182 return self._revlog.addgroup( |
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183 deltas, |
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184 linkmapper, |
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185 transaction, |
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186 addrevisioncb=addrevisioncb, |
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187 duplicaterevisioncb=duplicaterevisioncb, |
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188 debug_info=debug_info, |
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189 delta_base_reuse_policy=delta_base_reuse_policy, |
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190 ) |
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191 |
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192 def getstrippoint(self, minlink): |
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193 return self._revlog.getstrippoint(minlink) |
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194 |
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195 def strip(self, minlink, transaction): |
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196 return self._revlog.strip(minlink, transaction) |
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197 |
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198 def censorrevision(self, tr, node, tombstone=b''): |
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199 return self._revlog.censorrevision(tr, node, tombstone=tombstone) |
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200 |
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201 def files(self): |
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202 return self._revlog.files() |
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203 |
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204 def read(self, node): |
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205 return storageutil.filtermetadata(self.revision(node)) |
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207 def add(self, text, meta, transaction, link, p1=None, p2=None): | |
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208 if meta or text.startswith(b'\1\n'): |
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209 text = storageutil.packmeta(meta, text) |
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210 rev = self.addrevision(text, transaction, link, p1, p2) |
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211 return self.node(rev) |
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212 |
1116 | 213 def renamed(self, node): |
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214 return storageutil.filerevisioncopied(self, node) |
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216 def size(self, rev): |
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217 """return the size of a given revision""" |
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218 |
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219 # for revisions with renames, we have to go the slow way |
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220 node = self.node(rev) |
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221 if self.iscensored(rev): |
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222 return 0 |
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223 if self.renamed(node): |
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224 return len(self.read(node)) |
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225 |
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226 # XXX if self.read(node).startswith("\1\n"), this returns (size+4) |
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227 # XXX See also basefilectx.cmp. |
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228 return self._revlog.size(rev) |
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229 |
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230 def cmp(self, node, text): |
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231 """compare text with a given file revision |
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232 |
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233 returns True if text is different than what is stored. |
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234 """ |
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235 return not storageutil.filedataequivalent(self, node, text) |
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236 |
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237 def verifyintegrity(self, state): |
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238 return self._revlog.verifyintegrity(state) |
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239 |
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240 def storageinfo( |
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241 self, |
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242 exclusivefiles=False, |
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243 sharedfiles=False, |
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244 revisionscount=False, |
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245 trackedsize=False, |
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246 storedsize=False, |
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247 ): |
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248 return self._revlog.storageinfo( |
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249 exclusivefiles=exclusivefiles, |
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250 sharedfiles=sharedfiles, |
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251 revisionscount=revisionscount, |
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252 trackedsize=trackedsize, |
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253 storedsize=storedsize, |
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254 ) |
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255 |
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256 # Used by repo upgrade. |
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257 def clone(self, tr, destrevlog, **kwargs): |
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258 if not isinstance(destrevlog, filelog): |
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259 msg = b'expected filelog to clone(), not %r' |
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260 msg %= destrevlog |
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261 raise error.ProgrammingError(msg) |
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262 |
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263 return self._revlog.clone(tr, destrevlog._revlog, **kwargs) |
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264 |
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265 |
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266 class narrowfilelog(filelog): |
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267 """Filelog variation to be used with narrow stores.""" |
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268 |
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269 def __init__(self, opener, path, narrowmatch, try_split=False): |
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270 super(narrowfilelog, self).__init__(opener, path, try_split=try_split) |
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271 self._narrowmatch = narrowmatch |
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272 |
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273 def renamed(self, node): |
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274 res = super(narrowfilelog, self).renamed(node) |
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275 |
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276 # Renames that come from outside the narrowspec are problematic |
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277 # because we may lack the base text for the rename. This can result |
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278 # in code attempting to walk the ancestry or compute a diff |
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279 # encountering a missing revision. We address this by silently |
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280 # removing rename metadata if the source file is outside the |
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281 # narrow spec. |
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282 # |
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283 # A better solution would be to see if the base revision is available, |
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284 # rather than assuming it isn't. |
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285 # |
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286 # An even better solution would be to teach all consumers of rename |
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287 # metadata that the base revision may not be available. |
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288 # |
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289 # TODO consider better ways of doing this. |
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290 if res and not self._narrowmatch(res[0]): |
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291 return None |
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292 |
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293 return res |
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294 |
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295 def size(self, rev): |
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296 # Because we have a custom renamed() that may lie, we need to call |
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297 # the base renamed() to report accurate results. |
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298 node = self.node(rev) |
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299 if super(narrowfilelog, self).renamed(node): |
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300 return len(self.read(node)) |
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301 else: |
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302 return super(narrowfilelog, self).size(rev) |
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303 |
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304 def cmp(self, node, text): |
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305 # We don't call `super` because narrow parents can be buggy in case of a |
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306 # ambiguous dirstate. Always take the slow path until there is a better |
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307 # fix, see issue6150. |
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308 |
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309 # Censored files compare against the empty file. |
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310 if self.iscensored(self.rev(node)): |
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311 return text != b'' |
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312 |
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313 return self.read(node) != text |