upstream/mercurial-mirror Files · mercurial/dirstateguard.py

dispatch: ignore further SIGPIPE while handling KeyboardInterrupt...

dispatch: ignore further SIGPIPE while handling KeyboardInterrupt I got the following error by running "hg log" and quitting the pager immediately. Any output here may trigger another SIGPIPE, so only thing we can do is to swallow the exception and exit with an error status. Traceback (most recent call last): File "./hg", line 45, in <module> mercurial.dispatch.run() File "mercurial/dispatch.py", line 83, in run status = (dispatch(req) or 0) & 255 File "mercurial/dispatch.py", line 167, in dispatch req.ui.warn(_("interrupted!\n")) File "mercurial/ui.py", line 1224, in warn self.write_err(*msg, **opts) File "mercurial/ui.py", line 790, in write_err self._write_err(*msgs, **opts) File "mercurial/ui.py", line 798, in _write_err self.ferr.write(a) File "mercurial/ui.py", line 129, in _catchterm raise error.SignalInterrupt mercurial.error.SignalInterrupt Perhaps this wasn't visible before because the original stderr handle was restored very late.

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      # dirstateguard.py - class to allow restoring dirstate after failure

      #

      # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      from __future__ import absolute_import

      from .i18n import _

      from . import (

          error,

      )

      class dirstateguard(object):

          '''Restore dirstate at unexpected failure.

          At the construction, this class does:

          - write current ``repo.dirstate`` out, and

          - save ``.hg/dirstate`` into the backup file

          This restores ``.hg/dirstate`` from backup file, if ``release()``

          is invoked before ``close()``.

          This just removes the backup file at ``close()`` before ``release()``.

          '''

          def __init__(self, repo, name):

              self._repo = repo

              self._active = False

              self._closed = False

              self._suffix = '.backup.%s.%d' % (name, id(self))

              repo.dirstate.savebackup(repo.currenttransaction(), self._suffix)

              self._active = True

          def __del__(self):

              if self._active: # still active

                  # this may occur, even if this class is used correctly:

                  # for example, releasing other resources like transaction

                  # may raise exception before ``dirstateguard.release`` in

                  # ``release(tr, ....)``.

                  self._abort()

          def close(self):

              if not self._active: # already inactivated

                  msg = (_("can't close already inactivated backup: dirstate%s")

                         % self._suffix)

                  raise error.Abort(msg)

              self._repo.dirstate.clearbackup(self._repo.currenttransaction(),

                                               self._suffix)

              self._active = False

              self._closed = True

          def _abort(self):

              self._repo.dirstate.restorebackup(self._repo.currenttransaction(),

                                                 self._suffix)

              self._active = False

          def release(self):

              if not self._closed:

                  if not self._active: # already inactivated

                      msg = (_("can't release already inactivated backup:"

                               " dirstate%s")

                             % self._suffix)

                      raise error.Abort(msg)

                  self._abort()

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				# dirstateguard.py - class to allow restoring dirstate after failure
				#
				# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				from __future__ import absolute_import

				from .i18n import _

				from . import (
				error,
				)

				class dirstateguard(object):
				'''Restore dirstate at unexpected failure.

				At the construction, this class does:

				- write current ``repo.dirstate`` out, and
				- save ``.hg/dirstate`` into the backup file

				This restores ``.hg/dirstate`` from backup file, if ``release()``
				is invoked before ``close()``.

				This just removes the backup file at ``close()`` before ``release()``.
				'''

				def __init__(self, repo, name):
				self._repo = repo
				self._active = False
				self._closed = False
				self._suffix = '.backup.%s.%d' % (name, id(self))
				repo.dirstate.savebackup(repo.currenttransaction(), self._suffix)
				self._active = True

				def __del__(self):
				if self._active: # still active
				# this may occur, even if this class is used correctly:
				# for example, releasing other resources like transaction
				# may raise exception before ``dirstateguard.release`` in
				# ``release(tr, ....)``.
				self._abort()

				def close(self):
				if not self._active: # already inactivated
				msg = (_("can't close already inactivated backup: dirstate%s")
				% self._suffix)
				raise error.Abort(msg)

				self._repo.dirstate.clearbackup(self._repo.currenttransaction(),
				self._suffix)
				self._active = False
				self._closed = True

				def _abort(self):
				self._repo.dirstate.restorebackup(self._repo.currenttransaction(),
				self._suffix)
				self._active = False

				def release(self):
				if not self._closed:
				if not self._active: # already inactivated
				msg = (_("can't release already inactivated backup:"
				" dirstate%s")
				% self._suffix)
				raise error.Abort(msg)
				self._abort()