# -*- coding: utf-8 -*-

#

# Show newly installed leaf packages and packages that became leaves

# after a transaction.

#

# Copyright © 2009-2015 Ville Skyttä

#

# This copyrighted material is made available to anyone wishing to use,

# modify, copy, or redistribute it subject to the terms and conditions of

# the GNU General Public License v.2, or (at your option) any later version.

# This program is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY expressed or implied, including the implied warranties of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General

# Public License for more details.  You should have received a copy of the

# GNU General Public License along with this program; if not, write to the

# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the

# source code or documentation are not subject to the GNU General Public

# License and may only be used or replicated with the express permission of

# Red Hat, Inc.

#

import dnf

from dnfpluginscore import _

class ShowLeaves(dnf.Plugin):

    name = "show-leaves"

    leaves_command = None

    def __init__(self, base, cli):

        super(ShowLeaves, self).__init__(base, cli)

        self.base = base

        self.cli = cli

    def resolved(self):

        tx = self.base.transaction

        if not tx.install_set and not tx.remove_set:

            return

        leaves_command = self.cli.cli_commands.get("leaves")

        if not leaves_command:

            return

        self.leaves_command = leaves_command(self.cli)

        self.pre_leaves = set(("%s.%s" % (x.name, x.arch)

                               for x in self.leaves_command.findleaves()))

    def transaction(self):

        if not self.leaves_command:

            return

        self.post_leaves = set(("%s.%s" % (x.name, x.arch)

                                for x in self.leaves_command.findleaves()))

        new_leaves = self.post_leaves - self.pre_leaves

        if new_leaves:

            print(_("New leaves:"))

            for leaf in sorted(new_leaves):

                print("  {}".format(leaf))