Mercurial > hg
annotate hgext/journal.py @ 29564:db565a506729
test-http: use sed instead of fixed-with cut for reading access.log
Some systems (like FreeBSD jails) use something other than 127.0.0.1
for localhost, and it's not safe to assume it'll always be the same
width. Using sed with a replacement like this sidesteps the problem.
author | Augie Fackler <augie@google.com> |
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date | Fri, 15 Jul 2016 12:39:36 -0400 |
parents | 7503d8874617 |
children | 12f04946053c |
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 |
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23 from mercurial import ( |
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24 bookmarks, |
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25 cmdutil, |
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26 commands, |
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27 dirstate, |
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28 dispatch, |
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29 error, |
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30 extensions, |
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31 hg, |
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32 localrepo, |
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33 lock, |
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34 node, |
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35 util, |
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36 ) |
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37 |
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38 from . import share |
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39 |
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40 cmdtable = {} |
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41 command = cmdutil.command(cmdtable) |
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42 |
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43 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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44 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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45 # be specifying the version(s) of Mercurial they are tested with, or |
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46 # leave the attribute unspecified. |
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47 testedwith = 'internal' |
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48 |
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49 # storage format version; increment when the format changes |
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50 storageversion = 0 |
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51 |
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52 # namespaces |
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53 bookmarktype = 'bookmark' |
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54 wdirparenttype = 'wdirparent' |
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55 # In a shared repository, what shared feature name is used |
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56 # to indicate this namespace is shared with the source? |
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57 sharednamespaces = { |
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58 bookmarktype: hg.sharedbookmarks, |
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59 } |
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60 |
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61 # Journal recording, register hooks and storage object |
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62 def extsetup(ui): |
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63 extensions.wrapfunction(dispatch, 'runcommand', runcommand) |
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64 extensions.wrapfunction(bookmarks.bmstore, '_write', recordbookmarks) |
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65 extensions.wrapfunction( |
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66 dirstate.dirstate, '_writedirstate', recorddirstateparents) |
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67 extensions.wrapfunction( |
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68 localrepo.localrepository.dirstate, 'func', wrapdirstate) |
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69 extensions.wrapfunction(hg, 'postshare', wrappostshare) |
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70 extensions.wrapfunction(hg, 'copystore', unsharejournal) |
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71 |
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72 def reposetup(ui, repo): |
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73 if repo.local(): |
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74 repo.journal = journalstorage(repo) |
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75 |
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76 def runcommand(orig, lui, repo, cmd, fullargs, *args): |
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77 """Track the command line options for recording in the journal""" |
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78 journalstorage.recordcommand(*fullargs) |
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79 return orig(lui, repo, cmd, fullargs, *args) |
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80 |
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81 # hooks to record dirstate changes |
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82 def wrapdirstate(orig, repo): |
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83 """Make journal storage available to the dirstate object""" |
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84 dirstate = orig(repo) |
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85 if util.safehasattr(repo, 'journal'): |
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86 dirstate.journalstorage = repo.journal |
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87 return dirstate |
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88 |
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89 def recorddirstateparents(orig, dirstate, dirstatefp): |
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90 """Records all dirstate parent changes in the journal.""" |
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91 if util.safehasattr(dirstate, 'journalstorage'): |
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92 old = [node.nullid, node.nullid] |
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93 nodesize = len(node.nullid) |
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94 try: |
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95 # The only source for the old state is in the dirstate file still |
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96 # on disk; the in-memory dirstate object only contains the new |
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97 # state. dirstate._opendirstatefile() switches beteen .hg/dirstate |
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98 # and .hg/dirstate.pending depending on the transaction state. |
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99 with dirstate._opendirstatefile() as fp: |
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100 state = fp.read(2 * nodesize) |
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101 if len(state) == 2 * nodesize: |
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102 old = [state[:nodesize], state[nodesize:]] |
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103 except IOError: |
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104 pass |
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105 |
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106 new = dirstate.parents() |
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107 if old != new: |
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108 # only record two hashes if there was a merge |
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109 oldhashes = old[:1] if old[1] == node.nullid else old |
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110 newhashes = new[:1] if new[1] == node.nullid else new |
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111 dirstate.journalstorage.record( |
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112 wdirparenttype, '.', oldhashes, newhashes) |
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113 |
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114 return orig(dirstate, dirstatefp) |
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115 |
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116 # hooks to record bookmark changes (both local and remote) |
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117 def recordbookmarks(orig, store, fp): |
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118 """Records all bookmark changes in the journal.""" |
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119 repo = store._repo |
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120 if util.safehasattr(repo, 'journal'): |
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121 oldmarks = bookmarks.bmstore(repo) |
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122 for mark, value in store.iteritems(): |
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123 oldvalue = oldmarks.get(mark, node.nullid) |
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124 if value != oldvalue: |
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125 repo.journal.record(bookmarktype, mark, oldvalue, value) |
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126 return orig(store, fp) |
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127 |
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128 # shared repository support |
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129 def _readsharedfeatures(repo): |
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130 """A set of shared features for this repository""" |
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131 try: |
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132 return set(repo.vfs.read('shared').splitlines()) |
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133 except IOError as inst: |
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134 if inst.errno != errno.ENOENT: |
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135 raise |
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136 return set() |
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137 |
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138 def _mergeentriesiter(*iterables, **kwargs): |
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139 """Given a set of sorted iterables, yield the next entry in merged order |
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140 |
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141 Note that by default entries go from most recent to oldest. |
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142 """ |
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143 order = kwargs.pop('order', max) |
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144 iterables = [iter(it) for it in iterables] |
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145 # this tracks still active iterables; iterables are deleted as they are |
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146 # exhausted, which is why this is a dictionary and why each entry also |
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147 # stores the key. Entries are mutable so we can store the next value each |
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148 # time. |
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149 iterable_map = {} |
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150 for key, it in enumerate(iterables): |
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151 try: |
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152 iterable_map[key] = [next(it), key, it] |
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153 except StopIteration: |
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154 # empty entry, can be ignored |
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155 pass |
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156 |
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157 while iterable_map: |
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158 value, key, it = order(iterable_map.itervalues()) |
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159 yield value |
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160 try: |
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161 iterable_map[key][0] = next(it) |
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162 except StopIteration: |
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163 # this iterable is empty, remove it from consideration |
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164 del iterable_map[key] |
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165 |
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166 def wrappostshare(orig, sourcerepo, destrepo, **kwargs): |
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167 """Mark this shared working copy as sharing journal information""" |
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168 orig(sourcerepo, destrepo, **kwargs) |
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169 with destrepo.vfs('shared', 'a') as fp: |
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170 fp.write('journal\n') |
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171 |
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172 def unsharejournal(orig, ui, repo, repopath): |
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173 """Copy shared journal entries into this repo when unsharing""" |
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174 if (repo.path == repopath and repo.shared() and |
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175 util.safehasattr(repo, 'journal')): |
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176 sharedrepo = share._getsrcrepo(repo) |
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177 sharedfeatures = _readsharedfeatures(repo) |
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178 if sharedrepo and sharedfeatures > set(['journal']): |
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179 # there is a shared repository and there are shared journal entries |
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180 # to copy. move shared date over from source to destination but |
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181 # move the local file first |
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182 if repo.vfs.exists('journal'): |
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183 journalpath = repo.join('journal') |
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184 util.rename(journalpath, journalpath + '.bak') |
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185 storage = repo.journal |
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186 local = storage._open( |
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187 repo.vfs, filename='journal.bak', _newestfirst=False) |
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188 shared = ( |
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189 e for e in storage._open(sharedrepo.vfs, _newestfirst=False) |
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190 if sharednamespaces.get(e.namespace) in sharedfeatures) |
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191 for entry in _mergeentriesiter(local, shared, order=min): |
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192 storage._write(repo.vfs, entry) |
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193 |
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194 return orig(ui, repo, repopath) |
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195 |
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196 class journalentry(collections.namedtuple( |
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197 'journalentry', |
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198 'timestamp user command namespace name oldhashes newhashes')): |
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199 """Individual journal entry |
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200 |
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201 * timestamp: a mercurial (time, timezone) tuple |
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202 * user: the username that ran the command |
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203 * namespace: the entry namespace, an opaque string |
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204 * name: the name of the changed item, opaque string with meaning in the |
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205 namespace |
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206 * command: the hg command that triggered this record |
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207 * oldhashes: a tuple of one or more binary hashes for the old location |
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208 * newhashes: a tuple of one or more binary hashes for the new location |
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209 |
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210 Handles serialisation from and to the storage format. Fields are |
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211 separated by newlines, hashes are written out in hex separated by commas, |
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212 timestamp and timezone are separated by a space. |
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213 |
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214 """ |
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215 @classmethod |
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216 def fromstorage(cls, line): |
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217 (time, user, command, namespace, name, |
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218 oldhashes, newhashes) = line.split('\n') |
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219 timestamp, tz = time.split() |
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220 timestamp, tz = float(timestamp), int(tz) |
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221 oldhashes = tuple(node.bin(hash) for hash in oldhashes.split(',')) |
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222 newhashes = tuple(node.bin(hash) for hash in newhashes.split(',')) |
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223 return cls( |
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224 (timestamp, tz), user, command, namespace, name, |
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225 oldhashes, newhashes) |
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226 |
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227 def __str__(self): |
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228 """String representation for storage""" |
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229 time = ' '.join(map(str, self.timestamp)) |
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230 oldhashes = ','.join([node.hex(hash) for hash in self.oldhashes]) |
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231 newhashes = ','.join([node.hex(hash) for hash in self.newhashes]) |
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232 return '\n'.join(( |
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233 time, self.user, self.command, self.namespace, self.name, |
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234 oldhashes, newhashes)) |
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235 |
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236 class journalstorage(object): |
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237 """Storage for journal entries |
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238 |
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239 Entries are divided over two files; one with entries that pertain to the |
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240 local working copy *only*, and one with entries that are shared across |
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241 multiple working copies when shared using the share extension. |
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242 |
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243 Entries are stored with NUL bytes as separators. See the journalentry |
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244 class for the per-entry structure. |
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245 |
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246 The file format starts with an integer version, delimited by a NUL. |
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247 |
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248 This storage uses a dedicated lock; this makes it easier to avoid issues |
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249 with adding entries that added when the regular wlock is unlocked (e.g. |
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250 the dirstate). |
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251 |
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252 """ |
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253 _currentcommand = () |
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254 _lockref = None |
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255 |
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256 def __init__(self, repo): |
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257 self.user = util.getuser() |
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258 self.ui = repo.ui |
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259 self.vfs = repo.vfs |
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260 |
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261 # is this working copy using a shared storage? |
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262 self.sharedfeatures = self.sharedvfs = None |
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263 if repo.shared(): |
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264 features = _readsharedfeatures(repo) |
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265 sharedrepo = share._getsrcrepo(repo) |
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266 if sharedrepo is not None and 'journal' in features: |
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267 self.sharedvfs = sharedrepo.vfs |
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268 self.sharedfeatures = features |
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269 |
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270 # track the current command for recording in journal entries |
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271 @property |
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272 def command(self): |
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273 commandstr = ' '.join( |
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274 map(util.shellquote, journalstorage._currentcommand)) |
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275 if '\n' in commandstr: |
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276 # truncate multi-line commands |
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277 commandstr = commandstr.partition('\n')[0] + ' ...' |
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278 return commandstr |
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279 |
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280 @classmethod |
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281 def recordcommand(cls, *fullargs): |
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282 """Set the current hg arguments, stored with recorded entries""" |
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283 # Set the current command on the class because we may have started |
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284 # with a non-local repo (cloning for example). |
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285 cls._currentcommand = fullargs |
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286 |
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287 def jlock(self, vfs): |
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288 """Create a lock for the journal file""" |
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289 if self._lockref and self._lockref(): |
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290 raise error.Abort(_('journal lock does not support nesting')) |
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291 desc = _('journal of %s') % vfs.base |
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292 try: |
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293 l = lock.lock(vfs, 'journal.lock', 0, desc=desc) |
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294 except error.LockHeld as inst: |
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295 self.ui.warn( |
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296 _("waiting for lock on %s held by %r\n") % (desc, inst.locker)) |
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297 # default to 600 seconds timeout |
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298 l = lock.lock( |
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299 vfs, 'journal.lock', |
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300 int(self.ui.config("ui", "timeout", "600")), desc=desc) |
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301 self.ui.warn(_("got lock after %s seconds\n") % l.delay) |
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302 self._lockref = weakref.ref(l) |
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303 return l |
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304 |
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305 def record(self, namespace, name, oldhashes, newhashes): |
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306 """Record a new journal entry |
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307 |
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308 * namespace: an opaque string; this can be used to filter on the type |
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309 of recorded entries. |
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310 * name: the name defining this entry; for bookmarks, this is the |
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311 bookmark name. Can be filtered on when retrieving entries. |
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312 * oldhashes and newhashes: each a single binary hash, or a list of |
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313 binary hashes. These represent the old and new position of the named |
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314 item. |
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315 |
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316 """ |
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317 if not isinstance(oldhashes, list): |
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318 oldhashes = [oldhashes] |
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319 if not isinstance(newhashes, list): |
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320 newhashes = [newhashes] |
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321 |
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322 entry = journalentry( |
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323 util.makedate(), self.user, self.command, namespace, name, |
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324 oldhashes, newhashes) |
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325 |
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326 vfs = self.vfs |
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327 if self.sharedvfs is not None: |
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328 # write to the shared repository if this feature is being |
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329 # shared between working copies. |
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330 if sharednamespaces.get(namespace) in self.sharedfeatures: |
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331 vfs = self.sharedvfs |
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332 |
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333 self._write(vfs, entry) |
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334 |
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335 def _write(self, vfs, entry): |
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336 with self.jlock(vfs): |
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337 version = None |
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338 # open file in amend mode to ensure it is created if missing |
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339 with vfs('journal', mode='a+b', atomictemp=True) as f: |
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340 f.seek(0, os.SEEK_SET) |
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341 # Read just enough bytes to get a version number (up to 2 |
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342 # digits plus separator) |
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343 version = f.read(3).partition('\0')[0] |
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344 if version and version != str(storageversion): |
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345 # different version of the storage. Exit early (and not |
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346 # write anything) if this is not a version we can handle or |
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347 # the file is corrupt. In future, perhaps rotate the file |
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348 # instead? |
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349 self.ui.warn( |
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350 _("unsupported journal file version '%s'\n") % version) |
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351 return |
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352 if not version: |
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353 # empty file, write version first |
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354 f.write(str(storageversion) + '\0') |
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355 f.seek(0, os.SEEK_END) |
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356 f.write(str(entry) + '\0') |
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357 |
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358 def filtered(self, namespace=None, name=None): |
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359 """Yield all journal entries with the given namespace or name |
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360 |
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361 Both the namespace and the name are optional; if neither is given all |
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362 entries in the journal are produced. |
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363 |
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364 Matching supports regular expressions by using the `re:` prefix |
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365 (use `literal:` to match names or namespaces that start with `re:`) |
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366 |
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367 """ |
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368 if namespace is not None: |
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369 namespace = util.stringmatcher(namespace)[-1] |
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370 if name is not None: |
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371 name = util.stringmatcher(name)[-1] |
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372 for entry in self: |
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373 if namespace is not None and not namespace(entry.namespace): |
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374 continue |
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375 if name is not None and not name(entry.name): |
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376 continue |
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377 yield entry |
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378 |
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379 def __iter__(self): |
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380 """Iterate over the storage |
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381 |
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382 Yields journalentry instances for each contained journal record. |
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383 |
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384 """ |
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385 local = self._open(self.vfs) |
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386 |
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387 if self.sharedvfs is None: |
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388 return local |
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389 |
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390 # iterate over both local and shared entries, but only those |
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391 # shared entries that are among the currently shared features |
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392 shared = ( |
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393 e for e in self._open(self.sharedvfs) |
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394 if sharednamespaces.get(e.namespace) in self.sharedfeatures) |
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395 return _mergeentriesiter(local, shared) |
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396 |
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397 def _open(self, vfs, filename='journal', _newestfirst=True): |
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398 if not vfs.exists(filename): |
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399 return |
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400 |
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401 with vfs(filename) as f: |
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402 raw = f.read() |
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403 |
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404 lines = raw.split('\0') |
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405 version = lines and lines[0] |
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406 if version != str(storageversion): |
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407 version = version or _('not available') |
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408 raise error.Abort(_("unknown journal file version '%s'") % version) |
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409 |
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410 # Skip the first line, it's a version number. Normally we iterate over |
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411 # these in reverse order to list newest first; only when copying across |
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412 # a shared storage do we forgo reversing. |
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413 lines = lines[1:] |
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414 if _newestfirst: |
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415 lines = reversed(lines) |
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416 for line in lines: |
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417 if not line: |
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418 continue |
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419 yield journalentry.fromstorage(line) |
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420 |
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421 # journal reading |
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422 # log options that don't make sense for journal |
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423 _ignoreopts = ('no-merges', 'graph') |
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424 @command( |
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425 'journal', [ |
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426 ('', 'all', None, 'show history for all names'), |
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427 ('c', 'commits', None, 'show commit metadata'), |
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428 ] + [opt for opt in commands.logopts if opt[1] not in _ignoreopts], |
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429 '[OPTION]... [BOOKMARKNAME]') |
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430 def journal(ui, repo, *args, **opts): |
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431 """show the previous position of bookmarks and the working copy |
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432 |
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433 The journal is used to see the previous commits that bookmarks and the |
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434 working copy pointed to. By default the previous locations for the working |
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435 copy. Passing a bookmark name will show all the previous positions of |
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436 that bookmark. Use the --all switch to show previous locations for all |
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437 bookmarks and the working copy; each line will then include the bookmark |
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438 name, or '.' for the working copy, as well. |
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439 |
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440 If `name` starts with `re:`, the remainder of the name is treated as |
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441 a regular expression. To match a name that actually starts with `re:`, |
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442 use the prefix `literal:`. |
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443 |
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444 By default hg journal only shows the commit hash and the command that was |
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445 running at that time. -v/--verbose will show the prior hash, the user, and |
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446 the time at which it happened. |
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447 |
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448 Use -c/--commits to output log information on each commit hash; at this |
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449 point you can use the usual `--patch`, `--git`, `--stat` and `--template` |
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450 switches to alter the log output for these. |
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451 |
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452 `hg journal -T json` can be used to produce machine readable output. |
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453 |
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454 """ |
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455 name = '.' |
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456 if opts.get('all'): |
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457 if args: |
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458 raise error.Abort( |
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459 _("You can't combine --all and filtering on a name")) |
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460 name = None |
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461 if args: |
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462 name = args[0] |
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463 |
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464 fm = ui.formatter('journal', opts) |
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465 |
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466 if opts.get("template") != "json": |
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467 if name is None: |
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468 displayname = _('the working copy and bookmarks') |
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469 else: |
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470 displayname = "'%s'" % name |
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471 ui.status(_("previous locations of %s:\n") % displayname) |
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472 |
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473 limit = cmdutil.loglimit(opts) |
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474 entry = None |
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475 for count, entry in enumerate(repo.journal.filtered(name=name)): |
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476 if count == limit: |
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477 break |
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478 newhashesstr = ','.join([node.short(hash) for hash in entry.newhashes]) |
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479 oldhashesstr = ','.join([node.short(hash) for hash in entry.oldhashes]) |
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480 |
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481 fm.startitem() |
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482 fm.condwrite(ui.verbose, 'oldhashes', '%s -> ', oldhashesstr) |
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483 fm.write('newhashes', '%s', newhashesstr) |
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484 fm.condwrite(ui.verbose, 'user', ' %-8s', entry.user) |
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485 fm.condwrite( |
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486 opts.get('all') or name.startswith('re:'), |
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487 'name', ' %-8s', entry.name) |
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488 |
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489 timestring = util.datestr(entry.timestamp, '%Y-%m-%d %H:%M %1%2') |
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490 fm.condwrite(ui.verbose, 'date', ' %s', timestring) |
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491 fm.write('command', ' %s\n', entry.command) |
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492 |
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493 if opts.get("commits"): |
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494 displayer = cmdutil.show_changeset(ui, repo, opts, buffered=False) |
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495 for hash in entry.newhashes: |
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496 try: |
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497 ctx = repo[hash] |
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498 displayer.show(ctx) |
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499 except error.RepoLookupError as e: |
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500 fm.write('repolookuperror', "%s\n\n", str(e)) |
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501 displayer.close() |
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|
502 |
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503 fm.end() |
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|
504 |
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505 if entry is None: |
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506 ui.status(_("no recorded locations\n")) |