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annotate hgext3rd/evolve/hack/directaccess.py @ 1807:a53efee7d8b0

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hgext3rd: move 'directaccess' and 'inhibit' in 'evolve.hack' We move them in the 'hgext3rd' package. In the same move we put them under the 'evolve' package for clarity. We use a sub-package 'hack' to make their status clearer.
author Pierre-Yves David <pierre-yves.david@ens-lyon.org>
date Tue, 28 Feb 2017 14:36:18 +0100
parents hgext/directaccess.py@4565b046b850
children dd7e092a854a
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1 """ This extension provides direct access
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2 It is the ability to refer and access hidden sha in commands provided that you
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3 know their value.
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4 For example hg log -r xxx where xxx is a commit has should work whether xxx is
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5 hidden or not as we assume that the user knows what he is doing when referring
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6 to xxx.
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7 """
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8 from mercurial import extensions
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9 from mercurial import cmdutil
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10 from mercurial import repoview
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11 from mercurial import branchmap
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12 from mercurial import revset
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13 from mercurial import error
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14 from mercurial import commands
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15 from mercurial import hg
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16 from mercurial import util
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17 from mercurial.i18n import _
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18
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19 cmdtable = {}
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20 command = cmdutil.command(cmdtable)
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21
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22 # By default, all the commands have directaccess with warnings
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23 # List of commands that have no directaccess and directaccess with no warning
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24 directaccesslevel = [
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25 # Format:
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26 # ('nowarning', 'evolve', 'prune'),
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27 # means: no directaccess warning, for the command in evolve named prune
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28 #
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29 # ('error', None, 'serve'),
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30 # means: no directaccess for the command in core named serve
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31 #
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32 # The list is ordered alphabetically by command names, starting with all
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33 # the commands in core then all the commands in the extensions
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34 #
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35 # The general guideline is:
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36 # - remove directaccess warnings for read only commands
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37 # - no direct access for commands with consequences outside of the repo
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38 # - leave directaccess warnings for all the other commands
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39 #
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40 ('nowarning', None, 'annotate'),
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41 ('nowarning', None, 'archive'),
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42 ('nowarning', None, 'bisect'),
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43 ('nowarning', None, 'bookmarks'),
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44 ('nowarning', None, 'bundle'),
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45 ('nowarning', None, 'cat'),
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46 ('nowarning', None, 'diff'),
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47 ('nowarning', None, 'export'),
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48 ('nowarning', None, 'identify'),
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49 ('nowarning', None, 'incoming'),
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50 ('nowarning', None, 'log'),
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51 ('nowarning', None, 'manifest'),
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52 ('error', None, 'outgoing'), # confusing if push errors and not outgoing
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53 ('error', None, 'push'), # destructive
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54 ('nowarning', None, 'revert'),
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55 ('error', None, 'serve'),
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56 ('nowarning', None, 'tags'),
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57 ('nowarning', None, 'unbundle'),
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58 ('nowarning', None, 'update'),
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59 ]
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60
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61 def reposetup(ui, repo):
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62 repo._explicitaccess = set()
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63
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64 def _computehidden(repo):
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65 hidden = repoview.filterrevs(repo, 'visible')
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66 cl = repo.changelog
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67 dynamic = hidden & repo._explicitaccess
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68 if dynamic:
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69 blocked = cl.ancestors(dynamic, inclusive=True)
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70 hidden = frozenset(r for r in hidden if r not in blocked)
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71 return hidden
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72
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73 def setupdirectaccess():
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74 """ Add two new filtername that behave like visible to provide direct access
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75 and direct access with warning. Wraps the commands to setup direct access
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76 """
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77 repoview.filtertable.update({'visible-directaccess-nowarn': _computehidden})
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78 repoview.filtertable.update({'visible-directaccess-warn': _computehidden})
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79 branchmap.subsettable['visible-directaccess-nowarn'] = 'visible'
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80 branchmap.subsettable['visible-directaccess-warn'] = 'visible'
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81
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82 for warn, ext, cmd in directaccesslevel:
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83 try:
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84 cmdtable = extensions.find(ext).cmdtable if ext else commands.table
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85 wrapper = wrapwitherror if warn == 'error' else wrapwithoutwarning
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86 extensions.wrapcommand(cmdtable, cmd, wrapper)
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87 except (error.UnknownCommand, KeyError):
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88 pass
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89
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90 def wrapwitherror(orig, ui, repo, *args, **kwargs):
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91 if repo and repo.filtername == 'visible-directaccess-warn':
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92 repo = repo.filtered('visible')
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93 return orig(ui, repo, *args, **kwargs)
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94
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95 def wrapwithoutwarning(orig, ui, repo, *args, **kwargs):
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96 if repo and repo.filtername == 'visible-directaccess-warn':
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97 repo = repo.filtered("visible-directaccess-nowarn")
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98 return orig(ui, repo, *args, **kwargs)
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99
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100 def uisetup(ui):
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101 """ Change ordering of extensions to ensure that directaccess extsetup comes
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102 after the one of the extensions in the loadsafter list """
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103 loadsafter = ui.configlist('directaccess','loadsafter')
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104 order = list(extensions._order)
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105 directaccesidx = order.index('directaccess')
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106
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107 # The min idx for directaccess to load after all the extensions in loadafter
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108 minidxdirectaccess = directaccesidx
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109
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110 for ext in loadsafter:
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111 try:
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112 minidxdirectaccess = max(minidxdirectaccess, order.index(ext))
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113 except ValueError:
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114 pass # extension not loaded
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115
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116 if minidxdirectaccess > directaccesidx:
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117 order.insert(minidxdirectaccess + 1, 'directaccess')
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118 order.remove('directaccess')
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119 extensions._order = order
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120
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121 def _repository(orig, *args, **kwargs):
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122 """Make visible-directaccess-warn the default filter for new repos"""
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123 repo = orig(*args, **kwargs)
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124 return repo.filtered("visible-directaccess-warn")
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125
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126 def extsetup(ui):
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127 extensions.wrapfunction(revset, 'posttreebuilthook', _posttreebuilthook)
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128 extensions.wrapfunction(hg, 'repository', _repository)
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129 setupdirectaccess()
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130
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131 hashre = util.re.compile('[0-9a-fA-F]{1,40}')
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132
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133 _listtuple = ('symbol', '_list')
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134
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135 def _ishashsymbol(symbol, maxrev):
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136 # Returns true if symbol looks like a hash
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137 try:
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138 n = int(symbol)
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139 if n <= maxrev:
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140 # It's a rev number
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141 return False
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142 except ValueError:
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143 pass
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144 return hashre.match(symbol)
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145
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146 def gethashsymbols(tree, maxrev):
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147 # Returns the list of symbols of the tree that look like hashes
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148 # for example for the revset 3::abe3ff it will return ('abe3ff')
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149 if not tree:
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150 return []
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151
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152 results = []
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153 if len(tree) == 2 and tree[0] == "symbol":
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154 results.append(tree[1])
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155 elif tree[0] == "func" and tree[1] == _listtuple:
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156 # the optimiser will group sequence of hash request
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157 results += tree[2][1].split('\0')
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158 elif len(tree) >= 3:
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159 for subtree in tree[1:]:
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160 results += gethashsymbols(subtree, maxrev)
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161 # return directly, we don't need to filter symbols again
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162 return results
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163 return [s for s in results if _ishashsymbol(s, maxrev)]
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164
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165 def _posttreebuilthook(orig, tree, repo):
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166 # This is use to enabled direct hash access
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167 # We extract the symbols that look like hashes and add them to the
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168 # explicitaccess set
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169 orig(tree, repo)
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170 filternm = ""
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171 if repo is not None:
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172 filternm = repo.filtername
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173 if filternm is not None and filternm.startswith('visible-directaccess'):
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174 prelength = len(repo._explicitaccess)
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175 accessbefore = set(repo._explicitaccess)
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176 cl = repo.unfiltered().changelog
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177 repo.symbols = gethashsymbols(tree, len(cl))
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178 for node in repo.symbols:
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179 try:
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180 node = cl._partialmatch(node)
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181 except error.LookupError:
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182 node = None
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183 if node is not None:
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184 rev = cl.rev(node)
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185 if rev not in repo.changelog:
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186 repo._explicitaccess.add(rev)
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187 if prelength != len(repo._explicitaccess):
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188 if repo.filtername != 'visible-directaccess-nowarn':
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189 unhiddencommits = repo._explicitaccess - accessbefore
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190 repo.ui.warn(_("Warning: accessing hidden changesets %s "
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191 "for write operation\n") %
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192 (",".join([str(repo.unfiltered()[l])
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193 for l in unhiddencommits])))
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194 repo.invalidatevolatilesets()