# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>

#

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

# of the GNU General Public License, incorporated herein by reference.

from mercurial.i18n import _

from mercurial.node import *

from mercurial import util

import os

class Checker(object):

    '''acl checker.'''

    def __init__(self, ui, repo):

        self.ui = ui

        self.repo = repo

    def check(self, node):

        '''return if access allowed, raise exception if not.'''

        files = self.repo.changectx(node).files()

        for f in files:

                self.ui.debug(_('%s: user %s not allowed on %s\n') %

                              (__name__, self.getuser(), f))

                raise util.Abort(_('%s: access denied for changeset %s') %

                                 (__name__, short(node)))

        self.ui.debug(_('%s: allowing changeset %s\n') % (__name__, short(node)))

def hook(ui, repo, hooktype, node=None, source=None, **kwargs):

    if hooktype != 'pretxnchangegroup':

        raise util.Abort(_('config error - hook type "%s" cannot stop '

                           'incoming changesets') % hooktype)

    start = repo.changelog.rev(bin(node))

    end = repo.changelog.count()

    for rev in xrange(start, end):

        c.check(repo.changelog.node(rev))