Mercurial > hg
annotate hgext/journal.py @ 49002:fbc02ccc207e stable
rust-dirstatemap: properly decrement counter for tracked descendants
I found this bug when writing unit tests after the fact for the `DirstateMap`.
We never decremented the tracked descendants counter since we were always
resetting the node data before reading it. This also drops the use of `state`,
in favor of the new API to get that information.
Differential Revision: https://phab.mercurial-scm.org/D12431
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Tue, 05 Apr 2022 10:55:28 +0200 |
parents | d55b71393907 |
children | 6000f5b25c9b |
rev | line source |
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1 # journal.py |
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2 # |
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3 # Copyright 2014-2016 Facebook, Inc. |
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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 """track previous positions of bookmarks (EXPERIMENTAL) |
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8 |
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9 This extension adds a new command: `hg journal`, which shows you where |
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10 bookmarks were previously located. |
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11 |
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12 """ |
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13 |
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14 from __future__ import absolute_import |
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15 |
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16 import collections |
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17 import errno |
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18 import os |
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19 import weakref |
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20 |
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21 from mercurial.i18n import _ |
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22 from mercurial.node import ( |
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23 bin, |
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24 hex, |
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25 ) |
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26 |
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27 from mercurial import ( |
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28 bookmarks, |
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29 cmdutil, |
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30 dispatch, |
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31 encoding, |
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32 error, |
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33 extensions, |
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34 hg, |
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35 localrepo, |
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36 lock, |
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37 logcmdutil, |
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38 pycompat, |
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39 registrar, |
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40 util, |
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41 ) |
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42 from mercurial.utils import ( |
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43 dateutil, |
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44 procutil, |
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45 stringutil, |
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46 ) |
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47 |
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48 cmdtable = {} |
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49 command = registrar.command(cmdtable) |
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50 |
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51 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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52 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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53 # be specifying the version(s) of Mercurial they are tested with, or |
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54 # leave the attribute unspecified. |
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55 testedwith = b'ships-with-hg-core' |
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56 |
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57 # storage format version; increment when the format changes |
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58 storageversion = 0 |
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59 |
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60 # namespaces |
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61 bookmarktype = b'bookmark' |
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62 wdirparenttype = b'wdirparent' |
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63 # In a shared repository, what shared feature name is used |
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64 # to indicate this namespace is shared with the source? |
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65 sharednamespaces = { |
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66 bookmarktype: hg.sharedbookmarks, |
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67 } |
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68 |
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69 # Journal recording, register hooks and storage object |
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70 def extsetup(ui): |
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71 extensions.wrapfunction(dispatch, b'runcommand', runcommand) |
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72 extensions.wrapfunction(bookmarks.bmstore, b'_write', recordbookmarks) |
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73 extensions.wrapfilecache( |
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74 localrepo.localrepository, b'dirstate', wrapdirstate |
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75 ) |
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76 extensions.wrapfunction(hg, b'postshare', wrappostshare) |
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77 extensions.wrapfunction(hg, b'copystore', unsharejournal) |
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78 |
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79 |
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80 def reposetup(ui, repo): |
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81 if repo.local(): |
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82 repo.journal = journalstorage(repo) |
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83 repo._wlockfreeprefix.add(b'namejournal') |
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84 |
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85 dirstate, cached = localrepo.isfilecached(repo, b'dirstate') |
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86 if cached: |
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87 # already instantiated dirstate isn't yet marked as |
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88 # "journal"-ing, even though repo.dirstate() was already |
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89 # wrapped by own wrapdirstate() |
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90 _setupdirstate(repo, dirstate) |
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91 |
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92 |
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93 def runcommand(orig, lui, repo, cmd, fullargs, *args): |
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94 """Track the command line options for recording in the journal""" |
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95 journalstorage.recordcommand(*fullargs) |
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96 return orig(lui, repo, cmd, fullargs, *args) |
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97 |
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98 |
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99 def _setupdirstate(repo, dirstate): |
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100 dirstate.journalstorage = repo.journal |
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101 dirstate.addparentchangecallback(b'journal', recorddirstateparents) |
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102 |
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103 |
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104 # hooks to record dirstate changes |
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105 def wrapdirstate(orig, repo): |
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106 """Make journal storage available to the dirstate object""" |
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107 dirstate = orig(repo) |
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108 if util.safehasattr(repo, 'journal'): |
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109 _setupdirstate(repo, dirstate) |
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110 return dirstate |
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111 |
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112 |
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113 def recorddirstateparents(dirstate, old, new): |
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114 """Records all dirstate parent changes in the journal.""" |
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115 old = list(old) |
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116 new = list(new) |
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117 if util.safehasattr(dirstate, 'journalstorage'): |
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118 # only record two hashes if there was a merge |
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119 oldhashes = old[:1] if old[1] == dirstate._nodeconstants.nullid else old |
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120 newhashes = new[:1] if new[1] == dirstate._nodeconstants.nullid else new |
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121 dirstate.journalstorage.record( |
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122 wdirparenttype, b'.', oldhashes, newhashes |
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123 ) |
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124 |
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125 |
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126 # hooks to record bookmark changes (both local and remote) |
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127 def recordbookmarks(orig, store, fp): |
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128 """Records all bookmark changes in the journal.""" |
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129 repo = store._repo |
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130 if util.safehasattr(repo, 'journal'): |
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131 oldmarks = bookmarks.bmstore(repo) |
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132 for mark, value in pycompat.iteritems(store): |
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133 oldvalue = oldmarks.get(mark, repo.nullid) |
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134 if value != oldvalue: |
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135 repo.journal.record(bookmarktype, mark, oldvalue, value) |
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136 return orig(store, fp) |
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137 |
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138 |
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139 # shared repository support |
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140 def _readsharedfeatures(repo): |
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141 """A set of shared features for this repository""" |
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142 try: |
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143 return set(repo.vfs.read(b'shared').splitlines()) |
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144 except IOError as inst: |
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145 if inst.errno != errno.ENOENT: |
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146 raise |
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147 return set() |
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148 |
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149 |
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150 def _mergeentriesiter(*iterables, **kwargs): |
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151 """Given a set of sorted iterables, yield the next entry in merged order |
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152 |
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153 Note that by default entries go from most recent to oldest. |
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154 """ |
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155 order = kwargs.pop('order', max) |
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156 iterables = [iter(it) for it in iterables] |
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157 # this tracks still active iterables; iterables are deleted as they are |
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158 # exhausted, which is why this is a dictionary and why each entry also |
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159 # stores the key. Entries are mutable so we can store the next value each |
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160 # time. |
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161 iterable_map = {} |
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162 for key, it in enumerate(iterables): |
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163 try: |
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164 iterable_map[key] = [next(it), key, it] |
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165 except StopIteration: |
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166 # empty entry, can be ignored |
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167 pass |
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168 |
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169 while iterable_map: |
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170 value, key, it = order(pycompat.itervalues(iterable_map)) |
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171 yield value |
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172 try: |
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173 iterable_map[key][0] = next(it) |
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174 except StopIteration: |
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175 # this iterable is empty, remove it from consideration |
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176 del iterable_map[key] |
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177 |
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178 |
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179 def wrappostshare(orig, sourcerepo, destrepo, **kwargs): |
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180 """Mark this shared working copy as sharing journal information""" |
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181 with destrepo.wlock(): |
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182 orig(sourcerepo, destrepo, **kwargs) |
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183 with destrepo.vfs(b'shared', b'a') as fp: |
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184 fp.write(b'journal\n') |
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185 |
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186 |
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187 def unsharejournal(orig, ui, repo, repopath): |
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188 """Copy shared journal entries into this repo when unsharing""" |
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189 if ( |
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190 repo.path == repopath |
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191 and repo.shared() |
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192 and util.safehasattr(repo, 'journal') |
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193 ): |
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194 sharedrepo = hg.sharedreposource(repo) |
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195 sharedfeatures = _readsharedfeatures(repo) |
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196 if sharedrepo and sharedfeatures > {b'journal'}: |
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197 # there is a shared repository and there are shared journal entries |
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198 # to copy. move shared date over from source to destination but |
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199 # move the local file first |
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200 if repo.vfs.exists(b'namejournal'): |
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201 journalpath = repo.vfs.join(b'namejournal') |
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202 util.rename(journalpath, journalpath + b'.bak') |
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203 storage = repo.journal |
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204 local = storage._open( |
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205 repo.vfs, filename=b'namejournal.bak', _newestfirst=False |
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206 ) |
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207 shared = ( |
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208 e |
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209 for e in storage._open(sharedrepo.vfs, _newestfirst=False) |
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210 if sharednamespaces.get(e.namespace) in sharedfeatures |
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211 ) |
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212 for entry in _mergeentriesiter(local, shared, order=min): |
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213 storage._write(repo.vfs, entry) |
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214 |
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215 return orig(ui, repo, repopath) |
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216 |
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217 |
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218 class journalentry( |
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219 collections.namedtuple( |
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220 'journalentry', |
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221 'timestamp user command namespace name oldhashes newhashes', |
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222 ) |
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223 ): |
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224 """Individual journal entry |
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225 |
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226 * timestamp: a mercurial (time, timezone) tuple |
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227 * user: the username that ran the command |
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228 * namespace: the entry namespace, an opaque string |
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229 * name: the name of the changed item, opaque string with meaning in the |
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230 namespace |
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231 * command: the hg command that triggered this record |
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232 * oldhashes: a tuple of one or more binary hashes for the old location |
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233 * newhashes: a tuple of one or more binary hashes for the new location |
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234 |
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235 Handles serialisation from and to the storage format. Fields are |
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236 separated by newlines, hashes are written out in hex separated by commas, |
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237 timestamp and timezone are separated by a space. |
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238 |
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239 """ |
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240 |
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241 @classmethod |
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242 def fromstorage(cls, line): |
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243 ( |
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244 time, |
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245 user, |
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246 command, |
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247 namespace, |
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248 name, |
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249 oldhashes, |
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250 newhashes, |
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251 ) = line.split(b'\n') |
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252 timestamp, tz = time.split() |
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253 timestamp, tz = float(timestamp), int(tz) |
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254 oldhashes = tuple(bin(hash) for hash in oldhashes.split(b',')) |
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255 newhashes = tuple(bin(hash) for hash in newhashes.split(b',')) |
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256 return cls( |
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257 (timestamp, tz), |
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258 user, |
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259 command, |
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260 namespace, |
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261 name, |
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262 oldhashes, |
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263 newhashes, |
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264 ) |
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265 |
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266 def __bytes__(self): |
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267 """bytes representation for storage""" |
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268 time = b' '.join(map(pycompat.bytestr, self.timestamp)) |
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269 oldhashes = b','.join([hex(hash) for hash in self.oldhashes]) |
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270 newhashes = b','.join([hex(hash) for hash in self.newhashes]) |
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271 return b'\n'.join( |
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272 ( |
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273 time, |
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274 self.user, |
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275 self.command, |
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276 self.namespace, |
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277 self.name, |
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278 oldhashes, |
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279 newhashes, |
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280 ) |
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281 ) |
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282 |
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283 __str__ = encoding.strmethod(__bytes__) |
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284 |
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285 |
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286 class journalstorage(object): |
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287 """Storage for journal entries |
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288 |
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289 Entries are divided over two files; one with entries that pertain to the |
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290 local working copy *only*, and one with entries that are shared across |
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291 multiple working copies when shared using the share extension. |
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292 |
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293 Entries are stored with NUL bytes as separators. See the journalentry |
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294 class for the per-entry structure. |
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295 |
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296 The file format starts with an integer version, delimited by a NUL. |
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297 |
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298 This storage uses a dedicated lock; this makes it easier to avoid issues |
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299 with adding entries that added when the regular wlock is unlocked (e.g. |
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300 the dirstate). |
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301 |
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302 """ |
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303 |
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304 _currentcommand = () |
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305 _lockref = None |
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306 |
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307 def __init__(self, repo): |
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308 self.user = procutil.getuser() |
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309 self.ui = repo.ui |
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310 self.vfs = repo.vfs |
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311 |
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312 # is this working copy using a shared storage? |
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313 self.sharedfeatures = self.sharedvfs = None |
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314 if repo.shared(): |
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315 features = _readsharedfeatures(repo) |
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316 sharedrepo = hg.sharedreposource(repo) |
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317 if sharedrepo is not None and b'journal' in features: |
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318 self.sharedvfs = sharedrepo.vfs |
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319 self.sharedfeatures = features |
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320 |
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321 # track the current command for recording in journal entries |
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322 @property |
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323 def command(self): |
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324 commandstr = b' '.join( |
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325 map(procutil.shellquote, journalstorage._currentcommand) |
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326 ) |
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327 if b'\n' in commandstr: |
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328 # truncate multi-line commands |
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329 commandstr = commandstr.partition(b'\n')[0] + b' ...' |
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330 return commandstr |
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331 |
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332 @classmethod |
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333 def recordcommand(cls, *fullargs): |
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334 """Set the current hg arguments, stored with recorded entries""" |
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335 # Set the current command on the class because we may have started |
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336 # with a non-local repo (cloning for example). |
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337 cls._currentcommand = fullargs |
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338 |
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339 def _currentlock(self, lockref): |
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340 """Returns the lock if it's held, or None if it's not. |
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341 |
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342 (This is copied from the localrepo class) |
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343 """ |
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344 if lockref is None: |
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345 return None |
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346 l = lockref() |
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347 if l is None or not l.held: |
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348 return None |
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349 return l |
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350 |
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351 def jlock(self, vfs): |
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352 """Create a lock for the journal file""" |
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353 if self._currentlock(self._lockref) is not None: |
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354 raise error.Abort(_(b'journal lock does not support nesting')) |
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355 desc = _(b'journal of %s') % vfs.base |
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356 try: |
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357 l = lock.lock(vfs, b'namejournal.lock', 0, desc=desc) |
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358 except error.LockHeld as inst: |
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359 self.ui.warn( |
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360 _(b"waiting for lock on %s held by %r\n") % (desc, inst.locker) |
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361 ) |
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362 # default to 600 seconds timeout |
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363 l = lock.lock( |
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364 vfs, |
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365 b'namejournal.lock', |
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366 self.ui.configint(b"ui", b"timeout"), |
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367 desc=desc, |
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368 ) |
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369 self.ui.warn(_(b"got lock after %s seconds\n") % l.delay) |
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370 self._lockref = weakref.ref(l) |
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371 return l |
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372 |
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373 def record(self, namespace, name, oldhashes, newhashes): |
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374 """Record a new journal entry |
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375 |
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376 * namespace: an opaque string; this can be used to filter on the type |
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377 of recorded entries. |
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378 * name: the name defining this entry; for bookmarks, this is the |
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379 bookmark name. Can be filtered on when retrieving entries. |
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380 * oldhashes and newhashes: each a single binary hash, or a list of |
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381 binary hashes. These represent the old and new position of the named |
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382 item. |
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383 |
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384 """ |
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385 if not isinstance(oldhashes, list): |
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386 oldhashes = [oldhashes] |
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387 if not isinstance(newhashes, list): |
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388 newhashes = [newhashes] |
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389 |
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390 entry = journalentry( |
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391 dateutil.makedate(), |
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392 self.user, |
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393 self.command, |
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394 namespace, |
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395 name, |
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396 oldhashes, |
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397 newhashes, |
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398 ) |
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399 |
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400 vfs = self.vfs |
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401 if self.sharedvfs is not None: |
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402 # write to the shared repository if this feature is being |
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403 # shared between working copies. |
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404 if sharednamespaces.get(namespace) in self.sharedfeatures: |
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405 vfs = self.sharedvfs |
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406 |
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407 self._write(vfs, entry) |
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408 |
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409 def _write(self, vfs, entry): |
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410 with self.jlock(vfs): |
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411 # open file in amend mode to ensure it is created if missing |
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412 with vfs(b'namejournal', mode=b'a+b') as f: |
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413 f.seek(0, os.SEEK_SET) |
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414 # Read just enough bytes to get a version number (up to 2 |
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415 # digits plus separator) |
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416 version = f.read(3).partition(b'\0')[0] |
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417 if version and version != b"%d" % storageversion: |
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418 # different version of the storage. Exit early (and not |
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419 # write anything) if this is not a version we can handle or |
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420 # the file is corrupt. In future, perhaps rotate the file |
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421 # instead? |
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422 self.ui.warn( |
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423 _(b"unsupported journal file version '%s'\n") % version |
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424 ) |
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425 return |
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426 if not version: |
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427 # empty file, write version first |
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428 f.write((b"%d" % storageversion) + b'\0') |
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429 f.seek(0, os.SEEK_END) |
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430 f.write(bytes(entry) + b'\0') |
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431 |
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432 def filtered(self, namespace=None, name=None): |
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433 """Yield all journal entries with the given namespace or name |
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434 |
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435 Both the namespace and the name are optional; if neither is given all |
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436 entries in the journal are produced. |
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437 |
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438 Matching supports regular expressions by using the `re:` prefix |
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439 (use `literal:` to match names or namespaces that start with `re:`) |
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440 |
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441 """ |
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442 if namespace is not None: |
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443 namespace = stringutil.stringmatcher(namespace)[-1] |
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444 if name is not None: |
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445 name = stringutil.stringmatcher(name)[-1] |
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446 for entry in self: |
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447 if namespace is not None and not namespace(entry.namespace): |
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448 continue |
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449 if name is not None and not name(entry.name): |
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450 continue |
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451 yield entry |
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|
452 |
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453 def __iter__(self): |
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454 """Iterate over the storage |
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|
455 |
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456 Yields journalentry instances for each contained journal record. |
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|
457 |
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458 """ |
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459 local = self._open(self.vfs) |
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460 |
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461 if self.sharedvfs is None: |
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462 return local |
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|
463 |
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464 # iterate over both local and shared entries, but only those |
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465 # shared entries that are among the currently shared features |
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466 shared = ( |
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467 e |
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468 for e in self._open(self.sharedvfs) |
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469 if sharednamespaces.get(e.namespace) in self.sharedfeatures |
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470 ) |
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471 return _mergeentriesiter(local, shared) |
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472 |
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473 def _open(self, vfs, filename=b'namejournal', _newestfirst=True): |
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474 if not vfs.exists(filename): |
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475 return |
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476 |
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477 with vfs(filename) as f: |
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478 raw = f.read() |
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479 |
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480 lines = raw.split(b'\0') |
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481 version = lines and lines[0] |
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482 if version != b"%d" % storageversion: |
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483 version = version or _(b'not available') |
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484 raise error.Abort(_(b"unknown journal file version '%s'") % version) |
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485 |
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486 # Skip the first line, it's a version number. Normally we iterate over |
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487 # these in reverse order to list newest first; only when copying across |
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488 # a shared storage do we forgo reversing. |
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489 lines = lines[1:] |
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490 if _newestfirst: |
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491 lines = reversed(lines) |
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492 for line in lines: |
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493 if not line: |
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494 continue |
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495 yield journalentry.fromstorage(line) |
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496 |
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497 |
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498 # journal reading |
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499 # log options that don't make sense for journal |
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500 _ignoreopts = (b'no-merges', b'graph') |
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501 |
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502 |
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|
503 @command( |
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504 b'journal', |
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505 [ |
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506 (b'', b'all', None, b'show history for all names'), |
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507 (b'c', b'commits', None, b'show commit metadata'), |
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508 ] |
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509 + [opt for opt in cmdutil.logopts if opt[1] not in _ignoreopts], |
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510 b'[OPTION]... [BOOKMARKNAME]', |
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511 helpcategory=command.CATEGORY_CHANGE_ORGANIZATION, |
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512 ) |
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513 def journal(ui, repo, *args, **opts): |
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514 """show the previous position of bookmarks and the working copy |
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515 |
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516 The journal is used to see the previous commits that bookmarks and the |
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517 working copy pointed to. By default the previous locations for the working |
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518 copy. Passing a bookmark name will show all the previous positions of |
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519 that bookmark. Use the --all switch to show previous locations for all |
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520 bookmarks and the working copy; each line will then include the bookmark |
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521 name, or '.' for the working copy, as well. |
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522 |
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523 If `name` starts with `re:`, the remainder of the name is treated as |
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524 a regular expression. To match a name that actually starts with `re:`, |
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525 use the prefix `literal:`. |
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526 |
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527 By default hg journal only shows the commit hash and the command that was |
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528 running at that time. -v/--verbose will show the prior hash, the user, and |
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529 the time at which it happened. |
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530 |
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531 Use -c/--commits to output log information on each commit hash; at this |
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532 point you can use the usual `--patch`, `--git`, `--stat` and `--template` |
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533 switches to alter the log output for these. |
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534 |
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535 `hg journal -T json` can be used to produce machine readable output. |
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536 |
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537 """ |
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538 opts = pycompat.byteskwargs(opts) |
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539 name = b'.' |
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540 if opts.get(b'all'): |
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541 if args: |
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542 raise error.Abort( |
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543 _(b"You can't combine --all and filtering on a name") |
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544 ) |
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545 name = None |
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546 if args: |
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547 name = args[0] |
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548 |
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549 fm = ui.formatter(b'journal', opts) |
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550 |
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551 def formatnodes(nodes): |
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552 return fm.formatlist(map(fm.hexfunc, nodes), name=b'node', sep=b',') |
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553 |
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554 if opts.get(b"template") != b"json": |
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555 if name is None: |
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556 displayname = _(b'the working copy and bookmarks') |
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557 else: |
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558 displayname = b"'%s'" % name |
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559 ui.status(_(b"previous locations of %s:\n") % displayname) |
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560 |
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561 limit = logcmdutil.getlimit(opts) |
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562 entry = None |
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563 ui.pager(b'journal') |
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564 for count, entry in enumerate(repo.journal.filtered(name=name)): |
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565 if count == limit: |
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566 break |
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567 |
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568 fm.startitem() |
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569 fm.condwrite( |
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570 ui.verbose, b'oldnodes', b'%s -> ', formatnodes(entry.oldhashes) |
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571 ) |
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572 fm.write(b'newnodes', b'%s', formatnodes(entry.newhashes)) |
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573 fm.condwrite(ui.verbose, b'user', b' %-8s', entry.user) |
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574 fm.condwrite( |
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575 opts.get(b'all') or name.startswith(b're:'), |
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576 b'name', |
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577 b' %-8s', |
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578 entry.name, |
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579 ) |
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580 |
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581 fm.condwrite( |
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582 ui.verbose, |
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583 b'date', |
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584 b' %s', |
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585 fm.formatdate(entry.timestamp, b'%Y-%m-%d %H:%M %1%2'), |
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586 ) |
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587 fm.write(b'command', b' %s\n', entry.command) |
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588 |
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589 if opts.get(b"commits"): |
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590 if fm.isplain(): |
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591 displayer = logcmdutil.changesetdisplayer(ui, repo, opts) |
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592 else: |
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593 displayer = logcmdutil.changesetformatter( |
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594 ui, repo, fm.nested(b'changesets'), diffopts=opts |
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595 ) |
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596 for hash in entry.newhashes: |
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597 try: |
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598 ctx = repo[hash] |
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599 displayer.show(ctx) |
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600 except error.RepoLookupError as e: |
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601 fm.plain(b"%s\n\n" % pycompat.bytestr(e)) |
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602 displayer.close() |
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603 |
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604 fm.end() |
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605 |
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606 if entry is None: |
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607 ui.status(_(b"no recorded locations\n")) |