Current File : //lib/python3.6/site-packages/dnf/cli/main.py
# Copyright 2005 Duke University
# Copyright (C) 2012-2016 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 Library 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.
"""
Entrance point for the yum command line interface.
"""
from __future__ import print_function
from __future__ import absolute_import
from __future__ import unicode_literals
from dnf.conf import Conf
from dnf.cli.cli import Cli
from dnf.cli.option_parser import OptionParser
from dnf.i18n import ucd
from dnf.cli.utils import show_lock_owner
from dnf.i18n import _
import dnf.cli
import dnf.cli.cli
import dnf.cli.option_parser
import dnf.exceptions
import dnf.i18n
import dnf.logging
import dnf.util
import errno
import hawkey
import libdnf.error
import logging
import os
import os.path
import sys
logger = logging.getLogger("dnf")
def ex_IOError(e):
logger.log(dnf.logging.SUBDEBUG, '', exc_info=True)
logger.critical(ucd(e))
return 1
def ex_Error(e):
logger.log(dnf.logging.SUBDEBUG, '', exc_info=True)
if e.value is not None:
logger.critical(_('Error: %s'), ucd(e))
return 1
def main(args, conf_class=Conf, cli_class=Cli, option_parser_class=OptionParser):
try:
dnf.i18n.setup_stdout()
with dnf.cli.cli.BaseCli(conf_class()) as base:
return _main(base, args, cli_class, option_parser_class)
except dnf.exceptions.ProcessLockError as e:
logger.critical(e.value)
show_lock_owner(e.pid)
return 200
except dnf.exceptions.LockError as e:
logger.critical(e.value)
return 200
except dnf.exceptions.DepsolveError as e:
return 1
except dnf.exceptions.Error as e:
return ex_Error(e)
except hawkey.Exception as e:
logger.critical(_('Error: %s'), ucd(e))
return 1
except libdnf.error.Error as e:
logger.critical(_('Error: %s'), ucd(e))
return 1
except IOError as e:
return ex_IOError(e)
except KeyboardInterrupt as e:
logger.critical('{}: {}'.format(type(e).__name__, _("Terminated.")))
return 1
def _main(base, args, cli_class, option_parser):
"""Run the dnf program from a command line interface."""
# our core object for the cli
base._logging._presetup()
cli = cli_class(base)
# do our cli parsing and config file setup
# also sanity check the things being passed on the cli
try:
cli.configure(list(map(ucd, args)), option_parser())
except (IOError, OSError) as e:
return ex_IOError(e)
return cli_run(cli, base)
def cli_run(cli, base):
# Try to open the current directory to see if we have
# read and execute access. If not, chdir to /
try:
f = open(".")
except IOError as e:
if e.errno == errno.EACCES:
logger.critical(_('No read/execute access in current directory, moving to /'))
os.chdir("/")
else:
f.close()
try:
cli.run()
except dnf.exceptions.LockError:
raise
except (IOError, OSError) as e:
return ex_IOError(e)
if cli.demands.resolving:
try:
ret = resolving(cli, base)
except dnf.exceptions.DepsolveError as e:
ex_Error(e)
msg = ""
if not cli.demands.allow_erasing and base._goal.problem_conflicts(available=True):
msg += _("try to add '{}' to command line to replace conflicting "
"packages").format("--allowerasing")
if cli.base.conf.strict:
if not msg:
msg += _("try to add '{}' to skip uninstallable packages").format(
"--skip-broken")
else:
msg += _(" or '{}' to skip uninstallable packages").format("--skip-broken")
if cli.base.conf.best:
prio = cli.base.conf._get_priority("best")
if prio <= dnf.conf.PRIO_MAINCONFIG:
if not msg:
msg += _("try to add '{}' to use not only best candidate packages").format(
"--nobest")
else:
msg += _(" or '{}' to use not only best candidate packages").format(
"--nobest")
if msg:
logger.info("({})".format(msg))
raise
if ret:
return ret
cli.command.run_transaction()
return cli.demands.success_exit_status
def resolving(cli, base):
"""Perform the depsolve, download and RPM transaction stage."""
if base.transaction is None:
base.resolve(cli.demands.allow_erasing)
logger.info(_('Dependencies resolved.'))
cli.command.run_resolved()
# Run the transaction
displays = []
if cli.demands.transaction_display is not None:
displays.append(cli.demands.transaction_display)
try:
base.do_transaction(display=displays)
except dnf.cli.CliError as exc:
logger.error(ucd(exc))
return 1
except dnf.exceptions.TransactionCheckError as err:
for msg in cli.command.get_error_output(err):
logger.critical(msg)
return 1
except IOError as e:
return ex_IOError(e)
else:
logger.info(_('Complete!'))
return 0
def user_main(args, exit_code=False):
"""Call one of the multiple main() functions based on environment variables.
:param args: command line arguments passed into yum
:param exit_code: if *exit_code* is True, this function will exit
python with its exit code when it has finished executing.
Otherwise, it will return its exit code.
:return: the exit code from dnf.yum execution
"""
errcode = main(args)
if exit_code:
sys.exit(errcode)
return errcode
if __name__ == "__main__":
user_main(sys.argv[1:], exit_code=True)
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