scmutil: introduce filecache
The idea is being able to associate a file with a property, and watch
that file stat info for modifications when we decide it's important for it to
be up-to-date. Once it changes, we recreate the object.
On filesystems that can't uniquely identify a file, we always recreate.
As a consequence, localrepo.invalidate() will become much less expensive in the
case where nothing changed on-disk.
# 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'''
from mercurial import cmdutil
from mercurial.commands import templateopts
from mercurial.i18n import _
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.
"""
rev = opts.get('rev')
if file_:
ctx = repo.filectx(file_, changeid=rev)
else:
ctx = repo[rev]
displayer = cmdutil.show_changeset(ui, repo, opts)
for cctx in ctx.children():
displayer.show(cctx)
displayer.close()
cmdtable = {
"children":
(children,
[('r', 'rev', '',
_('show children of the specified revision'), _('REV')),
] + templateopts,
_('hg children [-r REV] [FILE]')),
}