Mercurial > hg
view mercurial/dirstateguard.py @ 39672:a1942015c10e
changegroup: add functionality to skip adding changelog data to changegroup
In narrow extension, when we have a non-ellipses narrow working copy and we
extend it, we pull all the changelog data again and the client tries to reapply
all that changelog data.
While downloading millions of changeset data is still not very expensive but
applying them on the client side is very expensive and takes ~10 minutes. These
10 minutes are added to every `hg tracked --addinclude <>` call and extending
a narrow copy becomes very slow.
This patch adds a new changelog argument to cgpacker.generate() fn. If the
changelog argument is set to False, we won't yield the changelog data. We still
have to iterate over the deltas returned by _generatechangelog() because that's
a generator and builds the data for clstate variable which is required for
calculating manifests and filelogs.
Differential Revision: https://phab.mercurial-scm.org/D4638
author | Pulkit Goyal <pulkit@yandex-team.ru> |
---|---|
date | Mon, 17 Sep 2018 21:41:34 +0300 |
parents | ad24b581e4d9 |
children | b74481038438 |
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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, narrowspec, util, ) class dirstateguard(util.transactional): '''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._backupname = 'dirstate.backup.%s.%d' % (name, id(self)) self._narrowspecbackupname = ('narrowspec.backup.%s.%d' % (name, id(self))) repo.dirstate.savebackup(repo.currenttransaction(), self._backupname) narrowspec.savebackup(repo, self._narrowspecbackupname) 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: %s") % self._backupname) raise error.Abort(msg) self._repo.dirstate.clearbackup(self._repo.currenttransaction(), self._backupname) narrowspec.clearbackup(self._repo, self._narrowspecbackupname) self._active = False self._closed = True def _abort(self): narrowspec.restorebackup(self._repo, self._narrowspecbackupname) self._repo.dirstate.restorebackup(self._repo.currenttransaction(), self._backupname) self._active = False def release(self): if not self._closed: if not self._active: # already inactivated msg = (_("can't release already inactivated backup: %s") % self._backupname) raise error.Abort(msg) self._abort()