Mercurial > hg
annotate mercurial/dirstateguard.py @ 30801:67ee7874e53b
revset: factor out getinteger() helper
We have 4 revset functions that take integer arguments, and they handle
their arguments in slightly different ways. This patch unifies them:
- getstring() in place of getsymbol(), which is more consistent with the
handling of integer revisions (both 1 and '1' are valid)
- say "expects" instead of "requires" for type errors
We don't need to catch TypeError since getstring() must return a string.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Mon, 09 Jan 2017 17:39:44 +0900 |
parents | 751639bf6fc4 |
children | ec306bc6915b |
rev | line source |
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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 Matt Mackall <mpm@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 from .i18n import _ |
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11 |
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12 from . import ( |
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13 error, |
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14 ) |
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15 |
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16 class dirstateguard(object): |
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17 '''Restore dirstate at unexpected failure. |
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18 |
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19 At the construction, this class does: |
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20 |
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21 - write current ``repo.dirstate`` out, and |
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22 - save ``.hg/dirstate`` into the backup file |
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23 |
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24 This restores ``.hg/dirstate`` from backup file, if ``release()`` |
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25 is invoked before ``close()``. |
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26 |
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27 This just removes the backup file at ``close()`` before ``release()``. |
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28 ''' |
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29 |
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30 def __init__(self, repo, name): |
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31 self._repo = repo |
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32 self._active = False |
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33 self._closed = False |
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34 self._suffix = '.backup.%s.%d' % (name, id(self)) |
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35 repo.dirstate.savebackup(repo.currenttransaction(), self._suffix) |
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36 self._active = True |
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37 |
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38 def __del__(self): |
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39 if self._active: # still active |
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40 # this may occur, even if this class is used correctly: |
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41 # for example, releasing other resources like transaction |
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42 # may raise exception before ``dirstateguard.release`` in |
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43 # ``release(tr, ....)``. |
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44 self._abort() |
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45 |
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46 def close(self): |
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47 if not self._active: # already inactivated |
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48 msg = (_("can't close already inactivated backup: dirstate%s") |
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49 % self._suffix) |
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50 raise error.Abort(msg) |
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51 |
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52 self._repo.dirstate.clearbackup(self._repo.currenttransaction(), |
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53 self._suffix) |
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54 self._active = False |
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55 self._closed = True |
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56 |
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57 def _abort(self): |
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58 self._repo.dirstate.restorebackup(self._repo.currenttransaction(), |
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59 self._suffix) |
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60 self._active = False |
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61 |
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62 def release(self): |
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63 if not self._closed: |
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64 if not self._active: # already inactivated |
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65 msg = (_("can't release already inactivated backup:" |
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66 " dirstate%s") |
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67 % self._suffix) |
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68 raise error.Abort(msg) |
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69 self._abort() |