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[EDIT] FILE: completion_helper.py

#!/usr/libexec/platform-python
#
# This file is part of dnf.
#
# Copyright 2015 (C) Igor Gnatenko <i.gnatenko.brain@gmail.com>
# Copyright 2016 (C) Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty 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

import dnf.exceptions
import dnf.cli
import dnf.cli.commands.clean
import sys

def filter_list_by_kw(kw, lst):
    return filter(lambda k: str(k).startswith(kw), lst)

def listpkg_to_setstr(pkgs):
    return set([str(x) for x in pkgs])

class RemoveCompletionCommand(dnf.cli.commands.remove.RemoveCommand):
    def __init__(self, args):
        super(RemoveCompletionCommand, self).__init__(args)

def configure(self):
        self.cli.demands.root_user = False
        self.cli.demands.sack_activation = True

def run(self):
        for pkg in ListCompletionCommand.installed(self.base, self.opts.pkg_specs):
            print(str(pkg))

class InstallCompletionCommand(dnf.cli.commands.install.InstallCommand):
    def __init__(self, args):
        super(InstallCompletionCommand, self).__init__(args)

def configure(self):
        self.cli.demands.root_user = False
        self.cli.demands.available_repos = True
        self.cli.demands.sack_activation = True

def run(self):
        installed = listpkg_to_setstr(ListCompletionCommand.installed(self.base,
                                                                      self.opts.pkg_specs))
        available = listpkg_to_setstr(ListCompletionCommand.available(self.base,
                                                                      self.opts.pkg_specs))
        for pkg in (available - installed):
            print(str(pkg))

class ReinstallCompletionCommand(dnf.cli.commands.reinstall.ReinstallCommand):
    def __init__(self, args):
        super(ReinstallCompletionCommand, self).__init__(args)

def configure(self):
        self.cli.demands.root_user = False
        self.cli.demands.available_repos = True
        self.cli.demands.sack_activation = True

def run(self):
        installed = listpkg_to_setstr(ListCompletionCommand.installed(self.base,
                                                                      self.opts.pkg_specs))
        available = listpkg_to_setstr(ListCompletionCommand.available(self.base,
                                                                      self.opts.pkg_specs))
        for pkg in (installed & available):
            print(str(pkg))

class ListCompletionCommand(dnf.cli.commands.ListCommand):
    def __init__(self, args):
        super(ListCompletionCommand, self).__init__(args)

def run(self):
        subcmds = self.pkgnarrows
        args = self.opts.packages
        action = self.opts.packages_action
        if len(args) > 1 and args[1] not in subcmds:
            print("\n".join(filter_list_by_kw(args[1], subcmds)))
        else:
            if action == "installed":
                pkgs = self.installed(self.base, args)
            elif action == "available":
                pkgs = self.available(self.base, args)
            elif action == "updates":
                pkgs = self.updates(self.base, args)
            else:
                available = listpkg_to_setstr(self.available(self.base, args))
                installed = listpkg_to_setstr(self.installed(self.base, args))
                pkgs = (available | installed)
                if not pkgs:
                    print("\n".join(filter_list_by_kw(args[0], subcmds)))
                    return
            for pkg in pkgs:
                print(str(pkg))

@staticmethod
    def installed(base, arg):
        return base.sack.query().installed().filterm(name__glob="{}*".format(arg[0]))

@staticmethod
    def available(base, arg):
        return base.sack.query().available().filterm(name__glob="{}*".format(arg[0]))

@staticmethod
    def updates(base, arg):
        return base.check_updates(["{}*".format(arg[0])], print_=False)

class RepoListCompletionCommand(dnf.cli.commands.repolist.RepoListCommand):
    def __init__(self, args):
        super(RepoListCompletionCommand, self).__init__(args)

def run(self):
        args = self.opts
        if args.repos_action == "enabled":
            print("\n".join(filter_list_by_kw(args.repos[0],
                            [r.id for r in self.base.repos.iter_enabled()])))
        elif args.repos_action == "disabled":
            print("\n".join(filter_list_by_kw(args.repos[0],
                            [r.id for r in self.base.repos.all() if not r.enabled])))
        elif args.repos_action == "all":
            print("\n".join(filter_list_by_kw(args.repos[0],
                            [r.id for r in self.base.repos.all()])))

class UpgradeCompletionCommand(dnf.cli.commands.upgrade.UpgradeCommand):
    def __init__(self, args):
        super(UpgradeCompletionCommand, self).__init__(args)

def configure(self):
        self.cli.demands.root_user = False
        self.cli.demands.available_repos = True
        self.cli.demands.sack_activation = True

def run(self):
        for pkg in ListCompletionCommand.updates(self.base, self.opts.pkg_specs):
            print(str(pkg))

class DowngradeCompletionCommand(dnf.cli.commands.downgrade.DowngradeCommand):
    def __init__(self, args):
        super(DowngradeCompletionCommand, self).__init__(args)

def configure(self):
        self.cli.demands.root_user = False
        self.cli.demands.available_repos = True
        self.cli.demands.sack_activation = True

def run(self):
        for pkg in ListCompletionCommand.available(self.base, self.opts.pkg_specs).downgrades():
            print(str(pkg))

class CleanCompletionCommand(dnf.cli.commands.clean.CleanCommand):
    def __init__(self, args):
        super(CleanCompletionCommand, self).__init__(args)

def run(self):
        subcmds = dnf.cli.commands.clean._CACHE_TYPES.keys()
        print("\n".join(filter_list_by_kw(self.opts.type[1], subcmds)))

def main(args):
    base = dnf.cli.cli.BaseCli()
    cli = dnf.cli.Cli(base)
    if args[0] == "_cmds":
        base.init_plugins([], [], cli)
        print("\n".join(filter_list_by_kw(args[1], cli.cli_commands)))
        return
    cli.cli_commands.clear()
    cli.register_command(RemoveCompletionCommand)
    cli.register_command(InstallCompletionCommand)
    cli.register_command(ReinstallCompletionCommand)
    cli.register_command(ListCompletionCommand)
    cli.register_command(RepoListCompletionCommand)
    cli.register_command(UpgradeCompletionCommand)
    cli.register_command(DowngradeCompletionCommand)
    cli.register_command(CleanCompletionCommand)
    cli.configure(args)
    try:
        cli.run()
    except (OSError, dnf.exceptions.Error):
        sys.exit(0)

if __name__ == "__main__":
    try:
        main(sys.argv[1:])
    except KeyboardInterrupt:
        sys.exit(1)

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