view hgext/children.py @ 5827:0c29977bd7db

record: refactor record into generic record driver

rationale
---------

I'd like to make MQ version of record -- qrecord.

>From the first glance it seemed to be easy -- the task in essence would be to
change call to cmdutil.commit() to something like mq.qrefresh().

As it turned out queue.refresh() and cmdutil.commit() have different semantics
-- cmdutil.commit() first scans for changes and then delegate the actual commit
to lowlevel func. On the other hand queue.refresh() do it all in once, and I am
a bit scary to change it.

Maybe the right way would be to first refactor queue.refresh() to use
cmdutil.commit() machinery, and then trivially adjust record, but I feel I'm
not competent for the task right now.

Instead, I propose we refactor record to be some sort of high-level driver, or
like a high-level decorator one can say, which will first interactively filter
changes, and then delegate commit job to high-level commiter, e.g. 'commit' or
'qrefresh'


So, this patch does just that -- refactor record to be generic driver, and
update 'hg record' code to use the driver.

'hg qrecord' will follow.

# Mercurial extension to provide the 'hg children' command
#
# Copyright 2007 by Intevation GmbH <[e-mail]>
# Author(s):
# Thomas Arendsen Hein <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

from mercurial import cmdutil
from mercurial.i18n import _


def children(ui, repo, file_=None, **opts):
    """show the children of the given or working dir revision

    Print the children of the working directory's revisions.
    If a revision is given via --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.changectx(rev)

    displayer = cmdutil.show_changeset(ui, repo, opts)
    for node in [cp.node() for cp in ctx.children()]:
        displayer.show(changenode=node)


cmdtable = {
    "children":
        (children,
         [('r', 'rev', '', _('show children of the specified rev')),
          ('', 'style', '', _('display using template map file')),
          ('', 'template', '', _('display with template'))],
         _('hg children [-r REV] [FILE]')),
}