Mercurial > hg
annotate mercurial/dirstateguard.py @ 48180:f78d8b8c46d7
setup: stop packaging python3.dll and python3X.dll in the wheel distribution
Now that exewrapper is smart enough to find the DLLs it needs without help from
the build script, backout ed286d150aa8 and 2960b7fac966. Note that this will
require deleting the build/lib.win-amd64-3.X directory to actually remove it
from the final wheel.
Differential Revision: https://phab.mercurial-scm.org/D11455
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Sun, 19 Sep 2021 01:36:37 -0400 |
parents | 222a42ac5b2d |
children | 6000f5b25c9b |
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1 # dirstateguard.py - class to allow restoring dirstate after failure |
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2 # |
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3 # Copyright 2005-2007 Olivia Mackall <olivia@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import os |
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11 from .i18n import _ |
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12 |
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13 from . import ( |
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14 error, |
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15 narrowspec, |
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16 requirements, |
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17 util, |
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18 ) |
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19 |
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20 |
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21 class dirstateguard(util.transactional): |
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22 """Restore dirstate at unexpected failure. |
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23 |
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24 At the construction, this class does: |
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25 |
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26 - write current ``repo.dirstate`` out, and |
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27 - save ``.hg/dirstate`` into the backup file |
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28 |
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29 This restores ``.hg/dirstate`` from backup file, if ``release()`` |
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30 is invoked before ``close()``. |
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31 |
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32 This just removes the backup file at ``close()`` before ``release()``. |
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33 """ |
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34 |
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35 def __init__(self, repo, name): |
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36 self._repo = repo |
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37 self._active = False |
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38 self._closed = False |
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39 |
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40 def getname(prefix): |
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41 fd, fname = repo.vfs.mkstemp(prefix=prefix) |
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42 os.close(fd) |
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43 return fname |
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44 |
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45 self._backupname = getname(b'dirstate.backup.%s.' % name) |
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46 repo.dirstate.savebackup(repo.currenttransaction(), self._backupname) |
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47 # Don't make this the empty string, things may join it with stuff and |
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48 # blindly try to unlink it, which could be bad. |
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49 self._narrowspecbackupname = None |
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50 if requirements.NARROW_REQUIREMENT in repo.requirements: |
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51 self._narrowspecbackupname = getname( |
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52 b'narrowspec.backup.%s.' % name |
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53 ) |
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54 narrowspec.savewcbackup(repo, self._narrowspecbackupname) |
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55 self._active = True |
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56 |
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57 def __del__(self): |
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58 if self._active: # still active |
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59 # this may occur, even if this class is used correctly: |
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60 # for example, releasing other resources like transaction |
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61 # may raise exception before ``dirstateguard.release`` in |
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62 # ``release(tr, ....)``. |
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63 self._abort() |
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64 |
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65 def close(self): |
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66 if not self._active: # already inactivated |
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67 msg = ( |
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68 _(b"can't close already inactivated backup: %s") |
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69 % self._backupname |
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70 ) |
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71 raise error.Abort(msg) |
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72 |
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73 self._repo.dirstate.clearbackup( |
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74 self._repo.currenttransaction(), self._backupname |
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75 ) |
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76 if self._narrowspecbackupname: |
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77 narrowspec.clearwcbackup(self._repo, self._narrowspecbackupname) |
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78 self._active = False |
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79 self._closed = True |
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80 |
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81 def _abort(self): |
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82 if self._narrowspecbackupname: |
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83 narrowspec.restorewcbackup(self._repo, self._narrowspecbackupname) |
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84 self._repo.dirstate.restorebackup( |
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85 self._repo.currenttransaction(), self._backupname |
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86 ) |
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87 self._active = False |
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88 |
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89 def release(self): |
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90 if not self._closed: |
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91 if not self._active: # already inactivated |
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92 msg = ( |
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93 _(b"can't release already inactivated backup: %s") |
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94 % self._backupname |
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95 ) |
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96 raise error.Abort(msg) |
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97 self._abort() |