Mercurial > hg
annotate hgext/journal.py @ 43973:ca5bd34c597b
githelp: drop unused variable assignments
Caught by PyCharm.
Differential Revision: https://phab.mercurial-scm.org/D7741
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Fri, 27 Dec 2019 13:29:45 -0500 |
parents | 9f70512ae2cf |
children | 59fa3890d40a |
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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 = b'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 = b'bookmark' |
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59 wdirparenttype = b'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, b'runcommand', runcommand) |
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69 extensions.wrapfunction(bookmarks.bmstore, b'_write', recordbookmarks) |
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70 extensions.wrapfilecache( |
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71 localrepo.localrepository, b'dirstate', wrapdirstate |
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72 ) |
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73 extensions.wrapfunction(hg, b'postshare', wrappostshare) |
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74 extensions.wrapfunction(hg, b'copystore', unsharejournal) |
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75 |
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76 |
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77 def reposetup(ui, repo): |
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78 if repo.local(): |
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79 repo.journal = journalstorage(repo) |
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80 repo._wlockfreeprefix.add(b'namejournal') |
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81 |
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82 dirstate, cached = localrepo.isfilecached(repo, b'dirstate') |
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83 if cached: |
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84 # already instantiated dirstate isn't yet marked as |
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85 # "journal"-ing, even though repo.dirstate() was already |
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86 # wrapped by own wrapdirstate() |
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87 _setupdirstate(repo, dirstate) |
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88 |
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89 |
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90 def runcommand(orig, lui, repo, cmd, fullargs, *args): |
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91 """Track the command line options for recording in the journal""" |
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92 journalstorage.recordcommand(*fullargs) |
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93 return orig(lui, repo, cmd, fullargs, *args) |
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94 |
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95 |
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96 def _setupdirstate(repo, dirstate): |
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97 dirstate.journalstorage = repo.journal |
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98 dirstate.addparentchangecallback(b'journal', recorddirstateparents) |
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99 |
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100 |
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101 # hooks to record dirstate changes |
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102 def wrapdirstate(orig, repo): |
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103 """Make journal storage available to the dirstate object""" |
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104 dirstate = orig(repo) |
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105 if util.safehasattr(repo, 'journal'): |
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106 _setupdirstate(repo, dirstate) |
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107 return dirstate |
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108 |
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109 |
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110 def recorddirstateparents(dirstate, old, new): |
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111 """Records all dirstate parent changes in the journal.""" |
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112 old = list(old) |
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113 new = list(new) |
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114 if util.safehasattr(dirstate, 'journalstorage'): |
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115 # only record two hashes if there was a merge |
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116 oldhashes = old[:1] if old[1] == node.nullid else old |
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117 newhashes = new[:1] if new[1] == node.nullid else new |
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118 dirstate.journalstorage.record( |
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119 wdirparenttype, b'.', oldhashes, newhashes |
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120 ) |
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121 |
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122 |
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123 # hooks to record bookmark changes (both local and remote) |
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124 def recordbookmarks(orig, store, fp): |
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125 """Records all bookmark changes in the journal.""" |
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126 repo = store._repo |
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127 if util.safehasattr(repo, 'journal'): |
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128 oldmarks = bookmarks.bmstore(repo) |
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129 for mark, value in pycompat.iteritems(store): |
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130 oldvalue = oldmarks.get(mark, node.nullid) |
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131 if value != oldvalue: |
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132 repo.journal.record(bookmarktype, mark, oldvalue, value) |
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133 return orig(store, fp) |
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134 |
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135 |
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136 # shared repository support |
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137 def _readsharedfeatures(repo): |
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138 """A set of shared features for this repository""" |
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139 try: |
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140 return set(repo.vfs.read(b'shared').splitlines()) |
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141 except IOError as inst: |
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142 if inst.errno != errno.ENOENT: |
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143 raise |
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144 return set() |
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145 |
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146 |
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147 def _mergeentriesiter(*iterables, **kwargs): |
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148 """Given a set of sorted iterables, yield the next entry in merged order |
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149 |
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150 Note that by default entries go from most recent to oldest. |
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151 """ |
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152 order = kwargs.pop('order', max) |
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153 iterables = [iter(it) for it in iterables] |
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154 # this tracks still active iterables; iterables are deleted as they are |
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155 # exhausted, which is why this is a dictionary and why each entry also |
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156 # stores the key. Entries are mutable so we can store the next value each |
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157 # time. |
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158 iterable_map = {} |
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159 for key, it in enumerate(iterables): |
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160 try: |
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161 iterable_map[key] = [next(it), key, it] |
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162 except StopIteration: |
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163 # empty entry, can be ignored |
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164 pass |
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165 |
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166 while iterable_map: |
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167 value, key, it = order(pycompat.itervalues(iterable_map)) |
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168 yield value |
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169 try: |
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170 iterable_map[key][0] = next(it) |
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171 except StopIteration: |
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172 # this iterable is empty, remove it from consideration |
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173 del iterable_map[key] |
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174 |
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175 |
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176 def wrappostshare(orig, sourcerepo, destrepo, **kwargs): |
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177 """Mark this shared working copy as sharing journal information""" |
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178 with destrepo.wlock(): |
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179 orig(sourcerepo, destrepo, **kwargs) |
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180 with destrepo.vfs(b'shared', b'a') as fp: |
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181 fp.write(b'journal\n') |
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182 |
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183 |
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184 def unsharejournal(orig, ui, repo, repopath): |
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185 """Copy shared journal entries into this repo when unsharing""" |
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186 if ( |
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187 repo.path == repopath |
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188 and repo.shared() |
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189 and util.safehasattr(repo, 'journal') |
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190 ): |
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191 sharedrepo = hg.sharedreposource(repo) |
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192 sharedfeatures = _readsharedfeatures(repo) |
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193 if sharedrepo and sharedfeatures > {b'journal'}: |
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194 # there is a shared repository and there are shared journal entries |
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195 # to copy. move shared date over from source to destination but |
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196 # move the local file first |
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197 if repo.vfs.exists(b'namejournal'): |
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198 journalpath = repo.vfs.join(b'namejournal') |
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199 util.rename(journalpath, journalpath + b'.bak') |
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200 storage = repo.journal |
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201 local = storage._open( |
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202 repo.vfs, filename=b'namejournal.bak', _newestfirst=False |
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203 ) |
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204 shared = ( |
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205 e |
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206 for e in storage._open(sharedrepo.vfs, _newestfirst=False) |
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207 if sharednamespaces.get(e.namespace) in sharedfeatures |
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208 ) |
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209 for entry in _mergeentriesiter(local, shared, order=min): |
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210 storage._write(repo.vfs, entry) |
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211 |
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212 return orig(ui, repo, repopath) |
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213 |
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214 |
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215 class journalentry( |
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216 collections.namedtuple( |
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217 'journalentry', |
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218 'timestamp user command namespace name oldhashes newhashes', |
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219 ) |
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220 ): |
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221 """Individual journal entry |
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222 |
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223 * timestamp: a mercurial (time, timezone) tuple |
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224 * user: the username that ran the command |
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225 * namespace: the entry namespace, an opaque string |
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226 * name: the name of the changed item, opaque string with meaning in the |
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227 namespace |
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228 * command: the hg command that triggered this record |
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229 * oldhashes: a tuple of one or more binary hashes for the old location |
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230 * newhashes: a tuple of one or more binary hashes for the new location |
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231 |
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232 Handles serialisation from and to the storage format. Fields are |
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233 separated by newlines, hashes are written out in hex separated by commas, |
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234 timestamp and timezone are separated by a space. |
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235 |
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236 """ |
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237 |
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238 @classmethod |
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239 def fromstorage(cls, line): |
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240 ( |
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241 time, |
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242 user, |
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243 command, |
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244 namespace, |
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245 name, |
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246 oldhashes, |
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247 newhashes, |
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248 ) = line.split(b'\n') |
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249 timestamp, tz = time.split() |
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250 timestamp, tz = float(timestamp), int(tz) |
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251 oldhashes = tuple(node.bin(hash) for hash in oldhashes.split(b',')) |
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252 newhashes = tuple(node.bin(hash) for hash in newhashes.split(b',')) |
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253 return cls( |
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254 (timestamp, tz), |
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255 user, |
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256 command, |
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257 namespace, |
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258 name, |
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259 oldhashes, |
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260 newhashes, |
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261 ) |
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262 |
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263 def __bytes__(self): |
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264 """bytes representation for storage""" |
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265 time = b' '.join(map(pycompat.bytestr, self.timestamp)) |
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266 oldhashes = b','.join([node.hex(hash) for hash in self.oldhashes]) |
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267 newhashes = b','.join([node.hex(hash) for hash in self.newhashes]) |
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268 return b'\n'.join( |
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269 ( |
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270 time, |
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271 self.user, |
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272 self.command, |
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273 self.namespace, |
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274 self.name, |
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275 oldhashes, |
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276 newhashes, |
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277 ) |
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278 ) |
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279 |
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280 __str__ = encoding.strmethod(__bytes__) |
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281 |
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282 |
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283 class journalstorage(object): |
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284 """Storage for journal entries |
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285 |
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286 Entries are divided over two files; one with entries that pertain to the |
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287 local working copy *only*, and one with entries that are shared across |
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288 multiple working copies when shared using the share extension. |
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289 |
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290 Entries are stored with NUL bytes as separators. See the journalentry |
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291 class for the per-entry structure. |
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292 |
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293 The file format starts with an integer version, delimited by a NUL. |
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294 |
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295 This storage uses a dedicated lock; this makes it easier to avoid issues |
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296 with adding entries that added when the regular wlock is unlocked (e.g. |
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297 the dirstate). |
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298 |
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299 """ |
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300 |
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301 _currentcommand = () |
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302 _lockref = None |
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303 |
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304 def __init__(self, repo): |
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305 self.user = procutil.getuser() |
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306 self.ui = repo.ui |
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307 self.vfs = repo.vfs |
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308 |
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309 # is this working copy using a shared storage? |
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310 self.sharedfeatures = self.sharedvfs = None |
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311 if repo.shared(): |
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312 features = _readsharedfeatures(repo) |
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313 sharedrepo = hg.sharedreposource(repo) |
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314 if sharedrepo is not None and b'journal' in features: |
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315 self.sharedvfs = sharedrepo.vfs |
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316 self.sharedfeatures = features |
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317 |
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318 # track the current command for recording in journal entries |
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319 @property |
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320 def command(self): |
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321 commandstr = b' '.join( |
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322 map(procutil.shellquote, journalstorage._currentcommand) |
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323 ) |
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324 if b'\n' in commandstr: |
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325 # truncate multi-line commands |
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326 commandstr = commandstr.partition(b'\n')[0] + b' ...' |
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327 return commandstr |
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328 |
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329 @classmethod |
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330 def recordcommand(cls, *fullargs): |
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331 """Set the current hg arguments, stored with recorded entries""" |
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332 # Set the current command on the class because we may have started |
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333 # with a non-local repo (cloning for example). |
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334 cls._currentcommand = fullargs |
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335 |
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336 def _currentlock(self, lockref): |
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337 """Returns the lock if it's held, or None if it's not. |
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338 |
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339 (This is copied from the localrepo class) |
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340 """ |
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341 if lockref is None: |
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342 return None |
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343 l = lockref() |
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344 if l is None or not l.held: |
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345 return None |
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346 return l |
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347 |
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348 def jlock(self, vfs): |
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349 """Create a lock for the journal file""" |
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350 if self._currentlock(self._lockref) is not None: |
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351 raise error.Abort(_(b'journal lock does not support nesting')) |
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352 desc = _(b'journal of %s') % vfs.base |
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353 try: |
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354 l = lock.lock(vfs, b'namejournal.lock', 0, desc=desc) |
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355 except error.LockHeld as inst: |
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356 self.ui.warn( |
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357 _(b"waiting for lock on %s held by %r\n") % (desc, inst.locker) |
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358 ) |
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359 # default to 600 seconds timeout |
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360 l = lock.lock( |
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361 vfs, |
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362 b'namejournal.lock', |
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363 self.ui.configint(b"ui", b"timeout"), |
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364 desc=desc, |
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365 ) |
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366 self.ui.warn(_(b"got lock after %s seconds\n") % l.delay) |
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367 self._lockref = weakref.ref(l) |
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368 return l |
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369 |
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370 def record(self, namespace, name, oldhashes, newhashes): |
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371 """Record a new journal entry |
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372 |
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373 * namespace: an opaque string; this can be used to filter on the type |
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374 of recorded entries. |
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375 * name: the name defining this entry; for bookmarks, this is the |
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376 bookmark name. Can be filtered on when retrieving entries. |
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377 * oldhashes and newhashes: each a single binary hash, or a list of |
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378 binary hashes. These represent the old and new position of the named |
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379 item. |
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380 |
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381 """ |
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382 if not isinstance(oldhashes, list): |
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383 oldhashes = [oldhashes] |
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384 if not isinstance(newhashes, list): |
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385 newhashes = [newhashes] |
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386 |
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387 entry = journalentry( |
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388 dateutil.makedate(), |
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389 self.user, |
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390 self.command, |
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391 namespace, |
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392 name, |
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393 oldhashes, |
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394 newhashes, |
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395 ) |
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396 |
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397 vfs = self.vfs |
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398 if self.sharedvfs is not None: |
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399 # write to the shared repository if this feature is being |
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400 # shared between working copies. |
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401 if sharednamespaces.get(namespace) in self.sharedfeatures: |
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402 vfs = self.sharedvfs |
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403 |
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404 self._write(vfs, entry) |
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405 |
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406 def _write(self, vfs, entry): |
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407 with self.jlock(vfs): |
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408 # open file in amend mode to ensure it is created if missing |
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409 with vfs(b'namejournal', mode=b'a+b') as f: |
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410 f.seek(0, os.SEEK_SET) |
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411 # Read just enough bytes to get a version number (up to 2 |
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412 # digits plus separator) |
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413 version = f.read(3).partition(b'\0')[0] |
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414 if version and version != b"%d" % storageversion: |
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415 # different version of the storage. Exit early (and not |
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416 # write anything) if this is not a version we can handle or |
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417 # the file is corrupt. In future, perhaps rotate the file |
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418 # instead? |
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419 self.ui.warn( |
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420 _(b"unsupported journal file version '%s'\n") % version |
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421 ) |
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422 return |
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423 if not version: |
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424 # empty file, write version first |
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425 f.write((b"%d" % storageversion) + b'\0') |
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426 f.seek(0, os.SEEK_END) |
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427 f.write(bytes(entry) + b'\0') |
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428 |
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429 def filtered(self, namespace=None, name=None): |
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430 """Yield all journal entries with the given namespace or name |
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431 |
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432 Both the namespace and the name are optional; if neither is given all |
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433 entries in the journal are produced. |
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434 |
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435 Matching supports regular expressions by using the `re:` prefix |
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436 (use `literal:` to match names or namespaces that start with `re:`) |
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437 |
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438 """ |
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439 if namespace is not None: |
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440 namespace = stringutil.stringmatcher(namespace)[-1] |
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441 if name is not None: |
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442 name = stringutil.stringmatcher(name)[-1] |
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443 for entry in self: |
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444 if namespace is not None and not namespace(entry.namespace): |
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445 continue |
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446 if name is not None and not name(entry.name): |
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447 continue |
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448 yield entry |
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449 |
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450 def __iter__(self): |
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451 """Iterate over the storage |
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452 |
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453 Yields journalentry instances for each contained journal record. |
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|
454 |
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455 """ |
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456 local = self._open(self.vfs) |
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457 |
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458 if self.sharedvfs is None: |
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459 return local |
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|
460 |
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461 # iterate over both local and shared entries, but only those |
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462 # shared entries that are among the currently shared features |
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463 shared = ( |
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464 e |
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465 for e in self._open(self.sharedvfs) |
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466 if sharednamespaces.get(e.namespace) in self.sharedfeatures |
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467 ) |
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468 return _mergeentriesiter(local, shared) |
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469 |
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470 def _open(self, vfs, filename=b'namejournal', _newestfirst=True): |
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471 if not vfs.exists(filename): |
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472 return |
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473 |
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474 with vfs(filename) as f: |
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475 raw = f.read() |
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476 |
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477 lines = raw.split(b'\0') |
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478 version = lines and lines[0] |
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479 if version != b"%d" % storageversion: |
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480 version = version or _(b'not available') |
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481 raise error.Abort(_(b"unknown journal file version '%s'") % version) |
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482 |
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483 # Skip the first line, it's a version number. Normally we iterate over |
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484 # these in reverse order to list newest first; only when copying across |
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485 # a shared storage do we forgo reversing. |
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486 lines = lines[1:] |
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487 if _newestfirst: |
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488 lines = reversed(lines) |
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489 for line in lines: |
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490 if not line: |
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491 continue |
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492 yield journalentry.fromstorage(line) |
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493 |
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494 |
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495 # journal reading |
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496 # log options that don't make sense for journal |
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497 _ignoreopts = (b'no-merges', b'graph') |
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498 |
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499 |
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500 @command( |
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501 b'journal', |
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502 [ |
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503 (b'', b'all', None, b'show history for all names'), |
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504 (b'c', b'commits', None, b'show commit metadata'), |
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505 ] |
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506 + [opt for opt in cmdutil.logopts if opt[1] not in _ignoreopts], |
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507 b'[OPTION]... [BOOKMARKNAME]', |
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508 helpcategory=command.CATEGORY_CHANGE_ORGANIZATION, |
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509 ) |
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510 def journal(ui, repo, *args, **opts): |
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511 """show the previous position of bookmarks and the working copy |
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512 |
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513 The journal is used to see the previous commits that bookmarks and the |
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514 working copy pointed to. By default the previous locations for the working |
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515 copy. Passing a bookmark name will show all the previous positions of |
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516 that bookmark. Use the --all switch to show previous locations for all |
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517 bookmarks and the working copy; each line will then include the bookmark |
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518 name, or '.' for the working copy, as well. |
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519 |
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520 If `name` starts with `re:`, the remainder of the name is treated as |
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521 a regular expression. To match a name that actually starts with `re:`, |
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522 use the prefix `literal:`. |
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523 |
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524 By default hg journal only shows the commit hash and the command that was |
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525 running at that time. -v/--verbose will show the prior hash, the user, and |
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526 the time at which it happened. |
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527 |
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528 Use -c/--commits to output log information on each commit hash; at this |
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529 point you can use the usual `--patch`, `--git`, `--stat` and `--template` |
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530 switches to alter the log output for these. |
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531 |
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532 `hg journal -T json` can be used to produce machine readable output. |
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533 |
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534 """ |
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535 opts = pycompat.byteskwargs(opts) |
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536 name = b'.' |
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537 if opts.get(b'all'): |
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538 if args: |
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539 raise error.Abort( |
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540 _(b"You can't combine --all and filtering on a name") |
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541 ) |
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542 name = None |
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543 if args: |
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544 name = args[0] |
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545 |
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546 fm = ui.formatter(b'journal', opts) |
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547 |
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548 def formatnodes(nodes): |
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549 return fm.formatlist(map(fm.hexfunc, nodes), name=b'node', sep=b',') |
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550 |
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551 if opts.get(b"template") != b"json": |
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552 if name is None: |
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553 displayname = _(b'the working copy and bookmarks') |
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554 else: |
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555 displayname = b"'%s'" % name |
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556 ui.status(_(b"previous locations of %s:\n") % displayname) |
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557 |
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558 limit = logcmdutil.getlimit(opts) |
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559 entry = None |
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560 ui.pager(b'journal') |
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561 for count, entry in enumerate(repo.journal.filtered(name=name)): |
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562 if count == limit: |
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563 break |
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564 |
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565 fm.startitem() |
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566 fm.condwrite( |
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567 ui.verbose, b'oldnodes', b'%s -> ', formatnodes(entry.oldhashes) |
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568 ) |
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569 fm.write(b'newnodes', b'%s', formatnodes(entry.newhashes)) |
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570 fm.condwrite(ui.verbose, b'user', b' %-8s', entry.user) |
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571 fm.condwrite( |
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572 opts.get(b'all') or name.startswith(b're:'), |
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573 b'name', |
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574 b' %-8s', |
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575 entry.name, |
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576 ) |
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577 |
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578 fm.condwrite( |
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579 ui.verbose, |
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580 b'date', |
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581 b' %s', |
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582 fm.formatdate(entry.timestamp, b'%Y-%m-%d %H:%M %1%2'), |
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583 ) |
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584 fm.write(b'command', b' %s\n', entry.command) |
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585 |
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586 if opts.get(b"commits"): |
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587 if fm.isplain(): |
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588 displayer = logcmdutil.changesetdisplayer(ui, repo, opts) |
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589 else: |
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590 displayer = logcmdutil.changesetformatter( |
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591 ui, repo, fm.nested(b'changesets'), diffopts=opts |
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592 ) |
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593 for hash in entry.newhashes: |
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594 try: |
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595 ctx = repo[hash] |
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596 displayer.show(ctx) |
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597 except error.RepoLookupError as e: |
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598 fm.plain(b"%s\n\n" % pycompat.bytestr(e)) |
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599 displayer.close() |
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600 |
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601 fm.end() |
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602 |
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603 if entry is None: |
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604 ui.status(_(b"no recorded locations\n")) |