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# alias.py
# Alias CLI command.
#
# Copyright (C) 2018 Red Hat, Inc.
#
# 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.
#
from __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals
import logging
import os.path
import dnf.cli
import dnf.cli.aliases
from dnf.cli import commands
import dnf.conf
import dnf.exceptions
from dnf.i18n import _
logger = logging.getLogger('dnf')
class AliasCommand(commands.Command):
aliases = ('alias',)
summary = _('List or create command aliases')
@staticmethod
def set_argparser(parser):
enable_group = parser.add_mutually_exclusive_group()
enable_group.add_argument(
'--enable-resolving', default=False, action='store_true',
help=_('enable aliases resolving'))
enable_group.add_argument(
'--disable-resolving', default=False, action='store_true',
help=_('disable aliases resolving'))
parser.add_argument("subcommand", nargs='?', default='list',
choices=['add', 'list', 'delete'],
help=_("action to do with aliases"))
parser.add_argument("alias", nargs="*", metavar="command[=result]",
help=_("alias definition"))
def configure(self):
demands = self.cli.demands
if self.opts.subcommand in ('add', 'delete'):
demands.root_user = True
self.aliases_base = dnf.cli.aliases.Aliases()
self.aliases_base._load_aliases()
self.resolving_enabled = self.aliases_base.enabled
self._update_config_from_options()
def _update_config_from_options(self):
enabled = None
if self.opts.enable_resolving:
enabled = True
logger.info(_("Aliases are now enabled"))
if self.opts.disable_resolving:
enabled = False
logger.info(_("Aliases are now disabled"))
if enabled is not None:
if not os.path.exists(dnf.cli.aliases.ALIASES_CONF_PATH):
open(dnf.cli.aliases.ALIASES_CONF_PATH, 'w').close()
dnf.conf.BaseConfig.write_raw_configfile(
dnf.cli.aliases.ALIASES_CONF_PATH,
'main', None, {'enabled': enabled})
if not self.aliases_base._disabled_by_environ():
self.aliases_base.enabled = enabled
def _parse_option_alias(self):
new_aliases = {}
for alias in self.opts.alias:
alias = alias.split('=', 1)
cmd = alias[0].strip()
if len(cmd.split()) != 1:
logger.warning(_("Invalid alias key: %s"), cmd)
continue
if cmd.startswith('-'):
logger.warning(_("Invalid alias key: %s"), cmd)
continue
if len(alias) == 1:
logger.warning(_("Alias argument has no value: %s"), cmd)
continue
new_aliases[cmd] = alias[1].split()
return new_aliases
def _load_user_aliases(self):
if not os.path.exists(dnf.cli.aliases.ALIASES_USER_PATH):
open(dnf.cli.aliases.ALIASES_USER_PATH, 'w').close()
try:
conf = dnf.cli.aliases.AliasesConfig(
dnf.cli.aliases.ALIASES_USER_PATH)
except dnf.exceptions.ConfigError as e:
logger.warning(_('Config error: %s'), e)
return None
return conf
def _store_user_aliases(self, user_aliases, enabled):
fileobj = open(dnf.cli.aliases.ALIASES_USER_PATH, 'w')
output = "[main]\n"
output += "enabled = {}\n\n".format(enabled)
output += "[aliases]\n"
for key, value in user_aliases.items():
output += "{} = {}\n".format(key, ' '.join(value))
fileobj.write(output)
def add_aliases(self, aliases):
conf = self._load_user_aliases()
user_aliases = conf.aliases
if user_aliases is None:
return
user_aliases.update(aliases)
self._store_user_aliases(user_aliases, conf.enabled)
logger.info(_("Aliases added: %s"), ', '.join(aliases.keys()))
def remove_aliases(self, cmds):
conf = self._load_user_aliases()
user_aliases = conf.aliases
if user_aliases is None:
return
valid_cmds = []
for cmd in cmds:
try:
del user_aliases[cmd]
valid_cmds.append(cmd)
except KeyError:
logger.info(_("Alias not found: %s"), cmd)
self._store_user_aliases(user_aliases, conf.enabled)
logger.info(_("Aliases deleted: %s"), ', '.join(valid_cmds))
def list_alias(self, cmd):
args = [cmd]
try:
args = self.aliases_base._resolve(args)
except dnf.exceptions.Error as e:
logger.error(
_('%s, alias %s="%s"'), e, cmd, (' ').join(self.aliases_base.aliases[cmd]))
else:
print(_("Alias %s='%s'") % (cmd, " ".join(args)))
def run(self):
if not self.aliases_base.enabled:
logger.warning(_("Aliases resolving is disabled."))
if self.opts.subcommand == 'add': # Add new alias
aliases = self._parse_option_alias()
if not aliases:
raise dnf.exceptions.Error(_("No aliases specified."))
self.add_aliases(aliases)
return
if self.opts.subcommand == 'delete': # Remove alias
cmds = self.opts.alias
if cmds == []:
raise dnf.exceptions.Error(_("No alias specified."))
self.remove_aliases(cmds)
return
if not self.opts.alias: # List all aliases
if not self.aliases_base.aliases:
logger.info(_("No aliases defined."))
return
for cmd in self.aliases_base.aliases:
self.list_alias(cmd)
else: # List alias by key
for cmd in self.opts.alias:
if cmd not in self.aliases_base.aliases:
logger.info(_("No match for alias: %s") % cmd)
continue
self.list_alias(cmd)