Mercurial > hg
annotate hgext/journal.py @ 30849:763031a7690d stable
tests: use an absolute path to get around '..' being invalid on a dead CWD
Only FreeBSD seems to be this picky. Note that this explicit
absolute-path `cd` exposes a defect in the test, in that we end up
still inside the cwd-vanish repository, but that's not a regression in
this change. Since we're in a code freeze, I'm doing the smallest
thing possible to try and fix bugs on FreeBSD, rather than cleaning up
the entire problem. I'll follow up with a more complete fix after the
freeze.
author | Augie Fackler <augie@google.com> |
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date | Thu, 19 Jan 2017 16:23:49 -0500 |
parents | 85d5708eae4e |
children | 74ee10702bbf |
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 dispatch, |
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28 error, |
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29 extensions, |
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30 hg, |
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31 localrepo, |
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32 lock, |
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33 node, |
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34 util, |
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35 ) |
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36 |
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37 from . import share |
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38 |
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39 cmdtable = {} |
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40 command = cmdutil.command(cmdtable) |
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41 |
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42 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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43 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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44 # be specifying the version(s) of Mercurial they are tested with, or |
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45 # leave the attribute unspecified. |
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46 testedwith = 'ships-with-hg-core' |
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47 |
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48 # storage format version; increment when the format changes |
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49 storageversion = 0 |
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50 |
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51 # namespaces |
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52 bookmarktype = 'bookmark' |
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53 wdirparenttype = 'wdirparent' |
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54 # In a shared repository, what shared feature name is used |
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55 # to indicate this namespace is shared with the source? |
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56 sharednamespaces = { |
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57 bookmarktype: hg.sharedbookmarks, |
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58 } |
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59 |
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60 # Journal recording, register hooks and storage object |
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61 def extsetup(ui): |
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62 extensions.wrapfunction(dispatch, 'runcommand', runcommand) |
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63 extensions.wrapfunction(bookmarks.bmstore, '_write', recordbookmarks) |
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64 extensions.wrapfunction( |
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65 localrepo.localrepository.dirstate, 'func', wrapdirstate) |
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66 extensions.wrapfunction(hg, 'postshare', wrappostshare) |
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67 extensions.wrapfunction(hg, 'copystore', unsharejournal) |
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68 |
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69 def reposetup(ui, repo): |
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70 if repo.local(): |
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71 repo.journal = journalstorage(repo) |
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72 |
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73 def runcommand(orig, lui, repo, cmd, fullargs, *args): |
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74 """Track the command line options for recording in the journal""" |
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75 journalstorage.recordcommand(*fullargs) |
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76 return orig(lui, repo, cmd, fullargs, *args) |
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77 |
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78 # hooks to record dirstate changes |
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79 def wrapdirstate(orig, repo): |
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80 """Make journal storage available to the dirstate object""" |
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81 dirstate = orig(repo) |
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82 if util.safehasattr(repo, 'journal'): |
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83 dirstate.journalstorage = repo.journal |
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84 dirstate.addparentchangecallback('journal', recorddirstateparents) |
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85 return dirstate |
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86 |
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87 def recorddirstateparents(dirstate, old, new): |
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88 """Records all dirstate parent changes in the journal.""" |
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89 old = list(old) |
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90 new = list(new) |
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91 if util.safehasattr(dirstate, 'journalstorage'): |
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92 # only record two hashes if there was a merge |
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93 oldhashes = old[:1] if old[1] == node.nullid else old |
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94 newhashes = new[:1] if new[1] == node.nullid else new |
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95 dirstate.journalstorage.record( |
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96 wdirparenttype, '.', oldhashes, newhashes) |
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97 |
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98 # hooks to record bookmark changes (both local and remote) |
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99 def recordbookmarks(orig, store, fp): |
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100 """Records all bookmark changes in the journal.""" |
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101 repo = store._repo |
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102 if util.safehasattr(repo, 'journal'): |
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103 oldmarks = bookmarks.bmstore(repo) |
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104 for mark, value in store.iteritems(): |
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105 oldvalue = oldmarks.get(mark, node.nullid) |
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106 if value != oldvalue: |
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107 repo.journal.record(bookmarktype, mark, oldvalue, value) |
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108 return orig(store, fp) |
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109 |
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110 # shared repository support |
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111 def _readsharedfeatures(repo): |
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112 """A set of shared features for this repository""" |
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113 try: |
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114 return set(repo.vfs.read('shared').splitlines()) |
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115 except IOError as inst: |
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116 if inst.errno != errno.ENOENT: |
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117 raise |
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118 return set() |
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119 |
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120 def _mergeentriesiter(*iterables, **kwargs): |
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121 """Given a set of sorted iterables, yield the next entry in merged order |
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122 |
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123 Note that by default entries go from most recent to oldest. |
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124 """ |
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125 order = kwargs.pop('order', max) |
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126 iterables = [iter(it) for it in iterables] |
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127 # this tracks still active iterables; iterables are deleted as they are |
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128 # exhausted, which is why this is a dictionary and why each entry also |
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129 # stores the key. Entries are mutable so we can store the next value each |
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130 # time. |
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131 iterable_map = {} |
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132 for key, it in enumerate(iterables): |
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133 try: |
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134 iterable_map[key] = [next(it), key, it] |
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135 except StopIteration: |
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136 # empty entry, can be ignored |
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137 pass |
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138 |
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139 while iterable_map: |
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140 value, key, it = order(iterable_map.itervalues()) |
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141 yield value |
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142 try: |
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143 iterable_map[key][0] = next(it) |
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144 except StopIteration: |
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145 # this iterable is empty, remove it from consideration |
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146 del iterable_map[key] |
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147 |
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148 def wrappostshare(orig, sourcerepo, destrepo, **kwargs): |
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149 """Mark this shared working copy as sharing journal information""" |
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150 with destrepo.wlock(): |
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151 orig(sourcerepo, destrepo, **kwargs) |
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152 with destrepo.vfs('shared', 'a') as fp: |
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153 fp.write('journal\n') |
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154 |
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155 def unsharejournal(orig, ui, repo, repopath): |
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156 """Copy shared journal entries into this repo when unsharing""" |
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157 if (repo.path == repopath and repo.shared() and |
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158 util.safehasattr(repo, 'journal')): |
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159 sharedrepo = share._getsrcrepo(repo) |
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160 sharedfeatures = _readsharedfeatures(repo) |
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161 if sharedrepo and sharedfeatures > set(['journal']): |
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162 # there is a shared repository and there are shared journal entries |
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163 # to copy. move shared date over from source to destination but |
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164 # move the local file first |
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165 if repo.vfs.exists('namejournal'): |
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166 journalpath = repo.join('namejournal') |
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167 util.rename(journalpath, journalpath + '.bak') |
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168 storage = repo.journal |
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169 local = storage._open( |
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170 repo.vfs, filename='namejournal.bak', _newestfirst=False) |
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171 shared = ( |
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172 e for e in storage._open(sharedrepo.vfs, _newestfirst=False) |
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173 if sharednamespaces.get(e.namespace) in sharedfeatures) |
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174 for entry in _mergeentriesiter(local, shared, order=min): |
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175 storage._write(repo.vfs, entry) |
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176 |
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177 return orig(ui, repo, repopath) |
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178 |
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179 class journalentry(collections.namedtuple( |
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180 u'journalentry', |
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181 u'timestamp user command namespace name oldhashes newhashes')): |
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182 """Individual journal entry |
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183 |
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184 * timestamp: a mercurial (time, timezone) tuple |
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185 * user: the username that ran the command |
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186 * namespace: the entry namespace, an opaque string |
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187 * name: the name of the changed item, opaque string with meaning in the |
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188 namespace |
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189 * command: the hg command that triggered this record |
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190 * oldhashes: a tuple of one or more binary hashes for the old location |
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191 * newhashes: a tuple of one or more binary hashes for the new location |
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192 |
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193 Handles serialisation from and to the storage format. Fields are |
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194 separated by newlines, hashes are written out in hex separated by commas, |
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195 timestamp and timezone are separated by a space. |
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196 |
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197 """ |
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198 @classmethod |
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199 def fromstorage(cls, line): |
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200 (time, user, command, namespace, name, |
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201 oldhashes, newhashes) = line.split('\n') |
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202 timestamp, tz = time.split() |
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203 timestamp, tz = float(timestamp), int(tz) |
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204 oldhashes = tuple(node.bin(hash) for hash in oldhashes.split(',')) |
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205 newhashes = tuple(node.bin(hash) for hash in newhashes.split(',')) |
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206 return cls( |
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207 (timestamp, tz), user, command, namespace, name, |
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208 oldhashes, newhashes) |
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209 |
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210 def __str__(self): |
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211 """String representation for storage""" |
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212 time = ' '.join(map(str, self.timestamp)) |
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213 oldhashes = ','.join([node.hex(hash) for hash in self.oldhashes]) |
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214 newhashes = ','.join([node.hex(hash) for hash in self.newhashes]) |
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215 return '\n'.join(( |
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216 time, self.user, self.command, self.namespace, self.name, |
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217 oldhashes, newhashes)) |
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218 |
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219 class journalstorage(object): |
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220 """Storage for journal entries |
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221 |
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222 Entries are divided over two files; one with entries that pertain to the |
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223 local working copy *only*, and one with entries that are shared across |
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224 multiple working copies when shared using the share extension. |
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225 |
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226 Entries are stored with NUL bytes as separators. See the journalentry |
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227 class for the per-entry structure. |
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228 |
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229 The file format starts with an integer version, delimited by a NUL. |
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230 |
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231 This storage uses a dedicated lock; this makes it easier to avoid issues |
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232 with adding entries that added when the regular wlock is unlocked (e.g. |
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233 the dirstate). |
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234 |
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235 """ |
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236 _currentcommand = () |
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237 _lockref = None |
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238 |
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239 def __init__(self, repo): |
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240 self.user = util.getuser() |
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241 self.ui = repo.ui |
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242 self.vfs = repo.vfs |
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243 |
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244 # is this working copy using a shared storage? |
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245 self.sharedfeatures = self.sharedvfs = None |
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246 if repo.shared(): |
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247 features = _readsharedfeatures(repo) |
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248 sharedrepo = share._getsrcrepo(repo) |
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249 if sharedrepo is not None and 'journal' in features: |
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250 self.sharedvfs = sharedrepo.vfs |
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251 self.sharedfeatures = features |
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252 |
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253 # track the current command for recording in journal entries |
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254 @property |
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255 def command(self): |
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256 commandstr = ' '.join( |
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257 map(util.shellquote, journalstorage._currentcommand)) |
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258 if '\n' in commandstr: |
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259 # truncate multi-line commands |
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260 commandstr = commandstr.partition('\n')[0] + ' ...' |
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261 return commandstr |
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262 |
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263 @classmethod |
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264 def recordcommand(cls, *fullargs): |
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265 """Set the current hg arguments, stored with recorded entries""" |
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266 # Set the current command on the class because we may have started |
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267 # with a non-local repo (cloning for example). |
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268 cls._currentcommand = fullargs |
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269 |
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270 def _currentlock(self, lockref): |
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271 """Returns the lock if it's held, or None if it's not. |
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272 |
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273 (This is copied from the localrepo class) |
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274 """ |
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275 if lockref is None: |
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276 return None |
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277 l = lockref() |
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278 if l is None or not l.held: |
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279 return None |
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280 return l |
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281 |
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282 def jlock(self, vfs): |
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283 """Create a lock for the journal file""" |
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284 if self._currentlock(self._lockref) is not None: |
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285 raise error.Abort(_('journal lock does not support nesting')) |
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286 desc = _('journal of %s') % vfs.base |
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287 try: |
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288 l = lock.lock(vfs, 'namejournal.lock', 0, desc=desc) |
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289 except error.LockHeld as inst: |
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290 self.ui.warn( |
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291 _("waiting for lock on %s held by %r\n") % (desc, inst.locker)) |
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292 # default to 600 seconds timeout |
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293 l = lock.lock( |
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294 vfs, 'namejournal.lock', |
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295 int(self.ui.config("ui", "timeout", "600")), desc=desc) |
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296 self.ui.warn(_("got lock after %s seconds\n") % l.delay) |
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297 self._lockref = weakref.ref(l) |
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298 return l |
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299 |
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300 def record(self, namespace, name, oldhashes, newhashes): |
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301 """Record a new journal entry |
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302 |
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303 * namespace: an opaque string; this can be used to filter on the type |
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304 of recorded entries. |
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305 * name: the name defining this entry; for bookmarks, this is the |
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306 bookmark name. Can be filtered on when retrieving entries. |
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307 * oldhashes and newhashes: each a single binary hash, or a list of |
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308 binary hashes. These represent the old and new position of the named |
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309 item. |
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310 |
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311 """ |
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312 if not isinstance(oldhashes, list): |
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313 oldhashes = [oldhashes] |
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314 if not isinstance(newhashes, list): |
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315 newhashes = [newhashes] |
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316 |
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317 entry = journalentry( |
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318 util.makedate(), self.user, self.command, namespace, name, |
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319 oldhashes, newhashes) |
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320 |
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321 vfs = self.vfs |
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322 if self.sharedvfs is not None: |
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323 # write to the shared repository if this feature is being |
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324 # shared between working copies. |
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325 if sharednamespaces.get(namespace) in self.sharedfeatures: |
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326 vfs = self.sharedvfs |
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327 |
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328 self._write(vfs, entry) |
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329 |
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330 def _write(self, vfs, entry): |
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331 with self.jlock(vfs): |
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332 version = None |
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333 # open file in amend mode to ensure it is created if missing |
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334 with vfs('namejournal', mode='a+b', atomictemp=True) as f: |
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335 f.seek(0, os.SEEK_SET) |
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336 # Read just enough bytes to get a version number (up to 2 |
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337 # digits plus separator) |
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338 version = f.read(3).partition('\0')[0] |
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339 if version and version != str(storageversion): |
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340 # different version of the storage. Exit early (and not |
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341 # write anything) if this is not a version we can handle or |
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342 # the file is corrupt. In future, perhaps rotate the file |
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343 # instead? |
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344 self.ui.warn( |
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345 _("unsupported journal file version '%s'\n") % version) |
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346 return |
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347 if not version: |
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348 # empty file, write version first |
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349 f.write(str(storageversion) + '\0') |
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350 f.seek(0, os.SEEK_END) |
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351 f.write(str(entry) + '\0') |
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352 |
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353 def filtered(self, namespace=None, name=None): |
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354 """Yield all journal entries with the given namespace or name |
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355 |
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356 Both the namespace and the name are optional; if neither is given all |
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357 entries in the journal are produced. |
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358 |
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359 Matching supports regular expressions by using the `re:` prefix |
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360 (use `literal:` to match names or namespaces that start with `re:`) |
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361 |
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362 """ |
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363 if namespace is not None: |
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364 namespace = util.stringmatcher(namespace)[-1] |
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365 if name is not None: |
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366 name = util.stringmatcher(name)[-1] |
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367 for entry in self: |
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368 if namespace is not None and not namespace(entry.namespace): |
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369 continue |
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370 if name is not None and not name(entry.name): |
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371 continue |
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372 yield entry |
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373 |
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374 def __iter__(self): |
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375 """Iterate over the storage |
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376 |
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377 Yields journalentry instances for each contained journal record. |
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378 |
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379 """ |
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380 local = self._open(self.vfs) |
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381 |
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382 if self.sharedvfs is None: |
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383 return local |
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384 |
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385 # iterate over both local and shared entries, but only those |
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386 # shared entries that are among the currently shared features |
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387 shared = ( |
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388 e for e in self._open(self.sharedvfs) |
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389 if sharednamespaces.get(e.namespace) in self.sharedfeatures) |
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390 return _mergeentriesiter(local, shared) |
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391 |
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392 def _open(self, vfs, filename='namejournal', _newestfirst=True): |
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393 if not vfs.exists(filename): |
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394 return |
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395 |
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396 with vfs(filename) as f: |
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397 raw = f.read() |
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398 |
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399 lines = raw.split('\0') |
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400 version = lines and lines[0] |
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401 if version != str(storageversion): |
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402 version = version or _('not available') |
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403 raise error.Abort(_("unknown journal file version '%s'") % version) |
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404 |
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405 # Skip the first line, it's a version number. Normally we iterate over |
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406 # these in reverse order to list newest first; only when copying across |
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407 # a shared storage do we forgo reversing. |
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408 lines = lines[1:] |
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409 if _newestfirst: |
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410 lines = reversed(lines) |
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411 for line in lines: |
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412 if not line: |
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413 continue |
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414 yield journalentry.fromstorage(line) |
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415 |
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416 # journal reading |
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417 # log options that don't make sense for journal |
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418 _ignoreopts = ('no-merges', 'graph') |
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419 @command( |
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420 'journal', [ |
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421 ('', 'all', None, 'show history for all names'), |
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422 ('c', 'commits', None, 'show commit metadata'), |
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423 ] + [opt for opt in commands.logopts if opt[1] not in _ignoreopts], |
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424 '[OPTION]... [BOOKMARKNAME]') |
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425 def journal(ui, repo, *args, **opts): |
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426 """show the previous position of bookmarks and the working copy |
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427 |
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428 The journal is used to see the previous commits that bookmarks and the |
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429 working copy pointed to. By default the previous locations for the working |
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430 copy. Passing a bookmark name will show all the previous positions of |
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431 that bookmark. Use the --all switch to show previous locations for all |
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432 bookmarks and the working copy; each line will then include the bookmark |
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433 name, or '.' for the working copy, as well. |
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434 |
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435 If `name` starts with `re:`, the remainder of the name is treated as |
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436 a regular expression. To match a name that actually starts with `re:`, |
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437 use the prefix `literal:`. |
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438 |
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439 By default hg journal only shows the commit hash and the command that was |
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440 running at that time. -v/--verbose will show the prior hash, the user, and |
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441 the time at which it happened. |
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442 |
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443 Use -c/--commits to output log information on each commit hash; at this |
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444 point you can use the usual `--patch`, `--git`, `--stat` and `--template` |
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445 switches to alter the log output for these. |
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446 |
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447 `hg journal -T json` can be used to produce machine readable output. |
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448 |
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449 """ |
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450 name = '.' |
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451 if opts.get('all'): |
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452 if args: |
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453 raise error.Abort( |
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454 _("You can't combine --all and filtering on a name")) |
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455 name = None |
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456 if args: |
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457 name = args[0] |
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458 |
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459 fm = ui.formatter('journal', opts) |
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460 |
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461 if opts.get("template") != "json": |
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462 if name is None: |
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463 displayname = _('the working copy and bookmarks') |
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464 else: |
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465 displayname = "'%s'" % name |
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466 ui.status(_("previous locations of %s:\n") % displayname) |
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467 |
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468 limit = cmdutil.loglimit(opts) |
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469 entry = None |
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470 for count, entry in enumerate(repo.journal.filtered(name=name)): |
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471 if count == limit: |
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|
472 break |
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473 newhashesstr = fm.formatlist(map(fm.hexfunc, entry.newhashes), |
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474 name='node', sep=',') |
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475 oldhashesstr = fm.formatlist(map(fm.hexfunc, entry.oldhashes), |
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476 name='node', sep=',') |
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477 |
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478 fm.startitem() |
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479 fm.condwrite(ui.verbose, 'oldhashes', '%s -> ', oldhashesstr) |
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480 fm.write('newhashes', '%s', newhashesstr) |
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481 fm.condwrite(ui.verbose, 'user', ' %-8s', entry.user) |
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482 fm.condwrite( |
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483 opts.get('all') or name.startswith('re:'), |
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484 'name', ' %-8s', entry.name) |
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|
485 |
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486 timestring = fm.formatdate(entry.timestamp, '%Y-%m-%d %H:%M %1%2') |
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487 fm.condwrite(ui.verbose, 'date', ' %s', timestring) |
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488 fm.write('command', ' %s\n', entry.command) |
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|
489 |
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490 if opts.get("commits"): |
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491 displayer = cmdutil.show_changeset(ui, repo, opts, buffered=False) |
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492 for hash in entry.newhashes: |
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493 try: |
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494 ctx = repo[hash] |
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495 displayer.show(ctx) |
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496 except error.RepoLookupError as e: |
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497 fm.write('repolookuperror', "%s\n\n", str(e)) |
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498 displayer.close() |
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|
499 |
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500 fm.end() |
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|
501 |
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|
502 if entry is None: |
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|
503 ui.status(_("no recorded locations\n")) |