Mercurial > hg
annotate hgext/journal.py @ 39439:dc61a67c1fc0
internals: extract wire protocol version 2 commands to standalone doc
wireprotocol.txt is a bit long and unwieldy. I think splitting it up
will help aid comprehension.
Let's start by extracting wire protocol version 2 commands to a
standalone document.
As part of the port, I munged with the section titles a bit and
expanded the TODO around node namespaces.
Differential Revision: https://phab.mercurial-scm.org/D4442
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Thu, 23 Aug 2018 13:11:13 -0700 |
parents | 9954d0e2ad00 |
children | dea771e63c3c |
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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 dispatch, |
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27 encoding, |
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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 logcmdutil, |
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34 node, |
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35 pycompat, |
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36 registrar, |
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37 util, |
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38 ) |
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39 from mercurial.utils import ( |
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40 dateutil, |
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41 procutil, |
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42 stringutil, |
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43 ) |
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44 |
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45 cmdtable = {} |
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46 command = registrar.command(cmdtable) |
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47 |
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48 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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49 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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50 # be specifying the version(s) of Mercurial they are tested with, or |
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51 # leave the attribute unspecified. |
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52 testedwith = 'ships-with-hg-core' |
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53 |
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54 # storage format version; increment when the format changes |
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55 storageversion = 0 |
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56 |
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57 # namespaces |
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58 bookmarktype = 'bookmark' |
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59 wdirparenttype = 'wdirparent' |
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60 # In a shared repository, what shared feature name is used |
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61 # to indicate this namespace is shared with the source? |
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62 sharednamespaces = { |
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63 bookmarktype: hg.sharedbookmarks, |
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64 } |
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65 |
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66 # Journal recording, register hooks and storage object |
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67 def extsetup(ui): |
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68 extensions.wrapfunction(dispatch, 'runcommand', runcommand) |
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69 extensions.wrapfunction(bookmarks.bmstore, '_write', recordbookmarks) |
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70 extensions.wrapfilecache( |
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71 localrepo.localrepository, 'dirstate', wrapdirstate) |
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72 extensions.wrapfunction(hg, 'postshare', wrappostshare) |
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73 extensions.wrapfunction(hg, 'copystore', unsharejournal) |
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74 |
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75 def reposetup(ui, repo): |
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76 if repo.local(): |
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77 repo.journal = journalstorage(repo) |
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78 repo._wlockfreeprefix.add('namejournal') |
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79 |
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80 dirstate, cached = localrepo.isfilecached(repo, 'dirstate') |
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81 if cached: |
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82 # already instantiated dirstate isn't yet marked as |
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83 # "journal"-ing, even though repo.dirstate() was already |
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84 # wrapped by own wrapdirstate() |
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85 _setupdirstate(repo, dirstate) |
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86 |
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87 def runcommand(orig, lui, repo, cmd, fullargs, *args): |
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88 """Track the command line options for recording in the journal""" |
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89 journalstorage.recordcommand(*fullargs) |
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90 return orig(lui, repo, cmd, fullargs, *args) |
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91 |
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92 def _setupdirstate(repo, dirstate): |
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93 dirstate.journalstorage = repo.journal |
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94 dirstate.addparentchangecallback('journal', recorddirstateparents) |
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95 |
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96 # hooks to record dirstate changes |
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97 def wrapdirstate(orig, repo): |
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98 """Make journal storage available to the dirstate object""" |
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99 dirstate = orig(repo) |
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100 if util.safehasattr(repo, 'journal'): |
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101 _setupdirstate(repo, dirstate) |
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102 return dirstate |
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103 |
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104 def recorddirstateparents(dirstate, old, new): |
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105 """Records all dirstate parent changes in the journal.""" |
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106 old = list(old) |
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107 new = list(new) |
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108 if util.safehasattr(dirstate, 'journalstorage'): |
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109 # only record two hashes if there was a merge |
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110 oldhashes = old[:1] if old[1] == node.nullid else old |
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111 newhashes = new[:1] if new[1] == node.nullid else new |
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112 dirstate.journalstorage.record( |
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113 wdirparenttype, '.', oldhashes, newhashes) |
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114 |
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115 # hooks to record bookmark changes (both local and remote) |
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116 def recordbookmarks(orig, store, fp): |
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117 """Records all bookmark changes in the journal.""" |
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118 repo = store._repo |
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119 if util.safehasattr(repo, 'journal'): |
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120 oldmarks = bookmarks.bmstore(repo) |
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121 for mark, value in store.iteritems(): |
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122 oldvalue = oldmarks.get(mark, node.nullid) |
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123 if value != oldvalue: |
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124 repo.journal.record(bookmarktype, mark, oldvalue, value) |
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125 return orig(store, fp) |
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126 |
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127 # shared repository support |
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128 def _readsharedfeatures(repo): |
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129 """A set of shared features for this repository""" |
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130 try: |
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131 return set(repo.vfs.read('shared').splitlines()) |
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132 except IOError as inst: |
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133 if inst.errno != errno.ENOENT: |
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134 raise |
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135 return set() |
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136 |
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137 def _mergeentriesiter(*iterables, **kwargs): |
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138 """Given a set of sorted iterables, yield the next entry in merged order |
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139 |
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140 Note that by default entries go from most recent to oldest. |
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141 """ |
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142 order = kwargs.pop(r'order', max) |
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143 iterables = [iter(it) for it in iterables] |
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144 # this tracks still active iterables; iterables are deleted as they are |
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145 # exhausted, which is why this is a dictionary and why each entry also |
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146 # stores the key. Entries are mutable so we can store the next value each |
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147 # time. |
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148 iterable_map = {} |
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149 for key, it in enumerate(iterables): |
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150 try: |
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151 iterable_map[key] = [next(it), key, it] |
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152 except StopIteration: |
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153 # empty entry, can be ignored |
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154 pass |
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155 |
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156 while iterable_map: |
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157 value, key, it = order(iterable_map.itervalues()) |
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158 yield value |
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159 try: |
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160 iterable_map[key][0] = next(it) |
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161 except StopIteration: |
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162 # this iterable is empty, remove it from consideration |
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163 del iterable_map[key] |
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164 |
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165 def wrappostshare(orig, sourcerepo, destrepo, **kwargs): |
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166 """Mark this shared working copy as sharing journal information""" |
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167 with destrepo.wlock(): |
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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 = hg.sharedreposource(repo) |
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177 sharedfeatures = _readsharedfeatures(repo) |
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178 if sharedrepo and sharedfeatures > {'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('namejournal'): |
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183 journalpath = repo.vfs.join('namejournal') |
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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='namejournal.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 u'journalentry', |
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198 u'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 __bytes__(self): |
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228 """bytes representation for storage""" |
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229 time = ' '.join(map(pycompat.bytestr, 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 __str__ = encoding.strmethod(__bytes__) |
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237 |
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238 class journalstorage(object): |
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239 """Storage for journal entries |
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240 |
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241 Entries are divided over two files; one with entries that pertain to the |
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242 local working copy *only*, and one with entries that are shared across |
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243 multiple working copies when shared using the share extension. |
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244 |
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245 Entries are stored with NUL bytes as separators. See the journalentry |
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246 class for the per-entry structure. |
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247 |
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248 The file format starts with an integer version, delimited by a NUL. |
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249 |
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250 This storage uses a dedicated lock; this makes it easier to avoid issues |
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251 with adding entries that added when the regular wlock is unlocked (e.g. |
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252 the dirstate). |
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253 |
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254 """ |
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255 _currentcommand = () |
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256 _lockref = None |
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257 |
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258 def __init__(self, repo): |
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259 self.user = procutil.getuser() |
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260 self.ui = repo.ui |
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261 self.vfs = repo.vfs |
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262 |
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263 # is this working copy using a shared storage? |
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264 self.sharedfeatures = self.sharedvfs = None |
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265 if repo.shared(): |
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266 features = _readsharedfeatures(repo) |
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267 sharedrepo = hg.sharedreposource(repo) |
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268 if sharedrepo is not None and 'journal' in features: |
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269 self.sharedvfs = sharedrepo.vfs |
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270 self.sharedfeatures = features |
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271 |
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272 # track the current command for recording in journal entries |
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273 @property |
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274 def command(self): |
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275 commandstr = ' '.join( |
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276 map(procutil.shellquote, journalstorage._currentcommand)) |
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277 if '\n' in commandstr: |
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278 # truncate multi-line commands |
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279 commandstr = commandstr.partition('\n')[0] + ' ...' |
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280 return commandstr |
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281 |
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282 @classmethod |
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283 def recordcommand(cls, *fullargs): |
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284 """Set the current hg arguments, stored with recorded entries""" |
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285 # Set the current command on the class because we may have started |
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286 # with a non-local repo (cloning for example). |
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287 cls._currentcommand = fullargs |
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288 |
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289 def _currentlock(self, lockref): |
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290 """Returns the lock if it's held, or None if it's not. |
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291 |
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292 (This is copied from the localrepo class) |
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293 """ |
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294 if lockref is None: |
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295 return None |
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296 l = lockref() |
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297 if l is None or not l.held: |
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298 return None |
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299 return l |
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300 |
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301 def jlock(self, vfs): |
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302 """Create a lock for the journal file""" |
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303 if self._currentlock(self._lockref) is not None: |
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304 raise error.Abort(_('journal lock does not support nesting')) |
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305 desc = _('journal of %s') % vfs.base |
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306 try: |
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307 l = lock.lock(vfs, 'namejournal.lock', 0, desc=desc) |
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308 except error.LockHeld as inst: |
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309 self.ui.warn( |
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310 _("waiting for lock on %s held by %r\n") % (desc, inst.locker)) |
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311 # default to 600 seconds timeout |
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312 l = lock.lock( |
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313 vfs, 'namejournal.lock', |
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314 self.ui.configint("ui", "timeout"), desc=desc) |
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315 self.ui.warn(_("got lock after %s seconds\n") % l.delay) |
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316 self._lockref = weakref.ref(l) |
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317 return l |
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318 |
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319 def record(self, namespace, name, oldhashes, newhashes): |
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320 """Record a new journal entry |
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321 |
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322 * namespace: an opaque string; this can be used to filter on the type |
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323 of recorded entries. |
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324 * name: the name defining this entry; for bookmarks, this is the |
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325 bookmark name. Can be filtered on when retrieving entries. |
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326 * oldhashes and newhashes: each a single binary hash, or a list of |
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327 binary hashes. These represent the old and new position of the named |
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328 item. |
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329 |
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330 """ |
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331 if not isinstance(oldhashes, list): |
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332 oldhashes = [oldhashes] |
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333 if not isinstance(newhashes, list): |
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334 newhashes = [newhashes] |
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335 |
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336 entry = journalentry( |
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337 dateutil.makedate(), self.user, self.command, namespace, name, |
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338 oldhashes, newhashes) |
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339 |
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340 vfs = self.vfs |
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341 if self.sharedvfs is not None: |
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342 # write to the shared repository if this feature is being |
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343 # shared between working copies. |
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344 if sharednamespaces.get(namespace) in self.sharedfeatures: |
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345 vfs = self.sharedvfs |
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346 |
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347 self._write(vfs, entry) |
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348 |
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349 def _write(self, vfs, entry): |
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350 with self.jlock(vfs): |
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351 version = None |
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352 # open file in amend mode to ensure it is created if missing |
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353 with vfs('namejournal', mode='a+b') as f: |
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354 f.seek(0, os.SEEK_SET) |
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355 # Read just enough bytes to get a version number (up to 2 |
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356 # digits plus separator) |
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357 version = f.read(3).partition('\0')[0] |
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358 if version and version != "%d" % storageversion: |
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359 # different version of the storage. Exit early (and not |
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360 # write anything) if this is not a version we can handle or |
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361 # the file is corrupt. In future, perhaps rotate the file |
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362 # instead? |
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363 self.ui.warn( |
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364 _("unsupported journal file version '%s'\n") % version) |
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365 return |
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366 if not version: |
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367 # empty file, write version first |
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368 f.write(("%d" % storageversion) + '\0') |
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369 f.seek(0, os.SEEK_END) |
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370 f.write(bytes(entry) + '\0') |
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371 |
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372 def filtered(self, namespace=None, name=None): |
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373 """Yield all journal entries with the given namespace or name |
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374 |
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375 Both the namespace and the name are optional; if neither is given all |
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376 entries in the journal are produced. |
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377 |
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378 Matching supports regular expressions by using the `re:` prefix |
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379 (use `literal:` to match names or namespaces that start with `re:`) |
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380 |
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381 """ |
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382 if namespace is not None: |
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383 namespace = stringutil.stringmatcher(namespace)[-1] |
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384 if name is not None: |
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385 name = stringutil.stringmatcher(name)[-1] |
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386 for entry in self: |
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387 if namespace is not None and not namespace(entry.namespace): |
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388 continue |
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389 if name is not None and not name(entry.name): |
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390 continue |
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391 yield entry |
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392 |
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393 def __iter__(self): |
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394 """Iterate over the storage |
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395 |
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396 Yields journalentry instances for each contained journal record. |
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397 |
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398 """ |
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399 local = self._open(self.vfs) |
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400 |
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401 if self.sharedvfs is None: |
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402 return local |
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403 |
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404 # iterate over both local and shared entries, but only those |
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405 # shared entries that are among the currently shared features |
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406 shared = ( |
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407 e for e in self._open(self.sharedvfs) |
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408 if sharednamespaces.get(e.namespace) in self.sharedfeatures) |
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409 return _mergeentriesiter(local, shared) |
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410 |
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411 def _open(self, vfs, filename='namejournal', _newestfirst=True): |
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412 if not vfs.exists(filename): |
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413 return |
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414 |
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415 with vfs(filename) as f: |
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416 raw = f.read() |
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417 |
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418 lines = raw.split('\0') |
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419 version = lines and lines[0] |
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420 if version != "%d" % storageversion: |
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421 version = version or _('not available') |
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422 raise error.Abort(_("unknown journal file version '%s'") % version) |
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423 |
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424 # Skip the first line, it's a version number. Normally we iterate over |
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425 # these in reverse order to list newest first; only when copying across |
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426 # a shared storage do we forgo reversing. |
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427 lines = lines[1:] |
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428 if _newestfirst: |
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429 lines = reversed(lines) |
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430 for line in lines: |
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431 if not line: |
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432 continue |
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433 yield journalentry.fromstorage(line) |
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434 |
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435 # journal reading |
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436 # log options that don't make sense for journal |
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437 _ignoreopts = ('no-merges', 'graph') |
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438 @command( |
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439 'journal', [ |
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440 ('', 'all', None, 'show history for all names'), |
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441 ('c', 'commits', None, 'show commit metadata'), |
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442 ] + [opt for opt in cmdutil.logopts if opt[1] not in _ignoreopts], |
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443 '[OPTION]... [BOOKMARKNAME]') |
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444 def journal(ui, repo, *args, **opts): |
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445 """show the previous position of bookmarks and the working copy |
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446 |
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447 The journal is used to see the previous commits that bookmarks and the |
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448 working copy pointed to. By default the previous locations for the working |
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449 copy. Passing a bookmark name will show all the previous positions of |
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450 that bookmark. Use the --all switch to show previous locations for all |
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451 bookmarks and the working copy; each line will then include the bookmark |
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452 name, or '.' for the working copy, as well. |
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453 |
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454 If `name` starts with `re:`, the remainder of the name is treated as |
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455 a regular expression. To match a name that actually starts with `re:`, |
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456 use the prefix `literal:`. |
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457 |
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458 By default hg journal only shows the commit hash and the command that was |
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459 running at that time. -v/--verbose will show the prior hash, the user, and |
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460 the time at which it happened. |
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461 |
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462 Use -c/--commits to output log information on each commit hash; at this |
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463 point you can use the usual `--patch`, `--git`, `--stat` and `--template` |
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464 switches to alter the log output for these. |
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465 |
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466 `hg journal -T json` can be used to produce machine readable output. |
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467 |
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468 """ |
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469 opts = pycompat.byteskwargs(opts) |
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470 name = '.' |
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471 if opts.get('all'): |
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472 if args: |
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473 raise error.Abort( |
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474 _("You can't combine --all and filtering on a name")) |
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475 name = None |
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476 if args: |
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477 name = args[0] |
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478 |
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479 fm = ui.formatter('journal', opts) |
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480 |
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481 if opts.get("template") != "json": |
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482 if name is None: |
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483 displayname = _('the working copy and bookmarks') |
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484 else: |
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485 displayname = "'%s'" % name |
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486 ui.status(_("previous locations of %s:\n") % displayname) |
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487 |
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488 limit = logcmdutil.getlimit(opts) |
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489 entry = None |
35462 | 490 ui.pager('journal') |
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491 for count, entry in enumerate(repo.journal.filtered(name=name)): |
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492 if count == limit: |
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493 break |
29677
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494 newhashesstr = fm.formatlist(map(fm.hexfunc, entry.newhashes), |
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495 name='node', sep=',') |
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496 oldhashesstr = fm.formatlist(map(fm.hexfunc, entry.oldhashes), |
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497 name='node', sep=',') |
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498 |
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499 fm.startitem() |
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500 fm.condwrite(ui.verbose, 'oldhashes', '%s -> ', oldhashesstr) |
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501 fm.write('newhashes', '%s', newhashesstr) |
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502 fm.condwrite(ui.verbose, 'user', ' %-8s', entry.user) |
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503 fm.condwrite( |
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504 opts.get('all') or name.startswith('re:'), |
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505 'name', ' %-8s', entry.name) |
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|
506 |
29679
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29677
diff
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|
507 timestring = fm.formatdate(entry.timestamp, '%Y-%m-%d %H:%M %1%2') |
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508 fm.condwrite(ui.verbose, 'date', ' %s', timestring) |
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509 fm.write('command', ' %s\n', entry.command) |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
510 |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
511 if opts.get("commits"): |
35954
386c1e45e671
logcmdutil: drop default arguments from changesetdisplayer/templater() calls
Yuya Nishihara <yuya@tcha.org>
parents:
35888
diff
changeset
|
512 displayer = logcmdutil.changesetdisplayer(ui, repo, opts) |
29443
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
513 for hash in entry.newhashes: |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
514 try: |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
515 ctx = repo[hash] |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
516 displayer.show(ctx) |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
517 except error.RepoLookupError as e: |
36653
2f7a3c90c0d7
py3: use pycompat.bytestr() to convert error messages to bytes
Pulkit Goyal <7895pulkit@gmail.com>
parents:
36607
diff
changeset
|
518 fm.write('repolookuperror', "%s\n\n", pycompat.bytestr(e)) |
29443
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
519 displayer.close() |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
520 |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
521 fm.end() |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
522 |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
523 if entry is None: |
cf092a3d202a
journal: new experimental extension
Martijn Pieters <mjpieters@fb.com>
parents:
diff
changeset
|
524 ui.status(_("no recorded locations\n")) |