Mercurial > hg
view hgext/children.py @ 38717:aa21a9ad46ea
sparse-revlog: new requirement enabled with format.sparse-revlog
The meaning of the new 'sparse-revlog' requirement is that the revlogs are
allowed to contain wider delta chains with larger holes between the interesting
chunks. These sparse delta chains should be read in several chunks to avoid a
potential explosion of memory usage.
Former version won't know how to read a delta chain in several chunks. They
would keep reading them in a single read, and therefore would be subject to the
potential memory explosion. Hence this new requirement: only versions having
support of sparse-revlog reading should be allowed to read such a revlog.
Implementation of this new algorithm and tools to enable or disable the
requirement will follow in the next changesets.
author | Paul Morelle <paul.morelle@octobus.net> |
---|---|
date | Mon, 04 Jun 2018 22:23:18 +0200 |
parents | 7c8524efd847 |
children | c303d65d2e34 |
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# Mercurial extension to provide the 'hg children' command # # Copyright 2007 by Intevation GmbH <intevation@intevation.de> # # Author(s): # Thomas Arendsen Hein <thomas@intevation.de> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. '''command to display child changesets (DEPRECATED) This extension is deprecated. You should use :hg:`log -r "children(REV)"` instead. ''' from __future__ import absolute_import from mercurial.i18n import _ from mercurial import ( cmdutil, logcmdutil, pycompat, registrar, scmutil, ) templateopts = cmdutil.templateopts cmdtable = {} command = registrar.command(cmdtable) # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should # be specifying the version(s) of Mercurial they are tested with, or # leave the attribute unspecified. testedwith = 'ships-with-hg-core' @command('children', [('r', 'rev', '.', _('show children of the specified revision'), _('REV')), ] + templateopts, _('hg children [-r REV] [FILE]'), inferrepo=True) def children(ui, repo, file_=None, **opts): """show the children of the given or working directory revision Print the children of the working directory's revisions. If a revision is given via -r/--rev, the children of that revision will be printed. If a file argument is given, revision in which the file was last changed (after the working directory revision or the argument to --rev if given) is printed. Please use :hg:`log` instead:: hg children => hg log -r "children(.)" hg children -r REV => hg log -r "children(REV)" See :hg:`help log` and :hg:`help revsets.children`. """ opts = pycompat.byteskwargs(opts) rev = opts.get('rev') ctx = scmutil.revsingle(repo, rev) if file_: fctx = repo.filectx(file_, changeid=ctx.rev()) childctxs = [fcctx.changectx() for fcctx in fctx.children()] else: childctxs = ctx.children() displayer = logcmdutil.changesetdisplayer(ui, repo, opts) for cctx in childctxs: displayer.show(cctx) displayer.close()