# 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, incorporated herein by reference.

from mercurial import cmdutil, util

from mercurial.i18n import _

from mercurial.node import nullid

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)

    if ctx.node() == nullid:

        raise util.Abort(_("All non-merge changesets are children of "

                           "the null revision!"))

    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]')),

}