1 # debugcommands.py - command processing for debug* commands

     2 #

     3 # Copyright 2005-2016 Matt Mackall <mpm@selenic.com>

     4 #

     5 # This software may be used and distributed according to the terms of the

     6 # GNU General Public License version 2 or any later version.

     7 

     8 from __future__ import absolute_import

     9 

    10 import os

    11 

    12 from .i18n import _

    13 from . import (

    14     cmdutil,

    15     commands,

    16     error,

    17     revlog,

    18     scmutil,

    19 )

    20 

    21 # We reuse the command table from commands because it is easier than

    22 # teaching dispatch about multiple tables.

    23 command = cmdutil.command(commands.table)

    24 

    25 @command('debugancestor', [], _('[INDEX] REV1 REV2'), optionalrepo=True)

    26 def debugancestor(ui, repo, *args):

    27     """find the ancestor revision of two revisions in a given index"""

    28     if len(args) == 3:

    29         index, rev1, rev2 = args

    30         r = revlog.revlog(scmutil.opener(os.getcwd(), audit=False), index)

    31         lookup = r.lookup

    32     elif len(args) == 2:

    33         if not repo:

    34             raise error.Abort(_('there is no Mercurial repository here '

    35                                 '(.hg not found)'))

    36         rev1, rev2 = args

    37         r = repo.changelog

    38         lookup = repo.lookup

    39     else:

    40         raise error.Abort(_('either two or three arguments required'))

    41     a = r.ancestor(lookup(rev1), lookup(rev2))

    42     ui.write('%d:%s\n' % (r.rev(a), hex(a)))