# 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 mercurial.i18n import _

from mercurial import (

    cmdutil,

    logcmdutil,

    pycompat,

    registrar,

)

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 = b'ships-with-hg-core'

@command(

    b'children',

    [

        (

            b'r',

            b'rev',

            b'.',

            _(b'show children of the specified revision'),

            _(b'REV'),

        ),

    ]

    + templateopts,

    _(b'hg children [-r REV] [FILE]'),

    helpcategory=command.CATEGORY_CHANGE_NAVIGATION,

    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(b'rev')

    ctx = logcmdutil.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()