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# Authors:
# Jason Gerard DeRose <jderose@redhat.com>
#
# Copyright (C) 2008 Red Hat
# see file 'COPYING' for use and warranty information
#
# 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; version 2 only
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
Functionality for Command Line Inteface.
"""
import re
import sys
import code
import optparse
import public
import errors
def to_cli(name):
"""
Takes a Python identifier and transforms it into form suitable for the
Command Line Interface.
"""
assert isinstance(name, str)
return name.replace('_', '-')
def from_cli(cli_name):
"""
Takes a string from the Command Line Interface and transforms it into a
Python identifier.
"""
return str(cli_name).replace('-', '_')
class help(public.Application):
'Display help on a command.'
def __call__(self, key):
key = str(key)
if key not in self.application:
print 'help: no such command %r' % key
sys.exit(2)
cmd = self.application[key]
print 'Purpose: %s' % cmd.doc
self.application.build_parser(cmd).print_help()
class console(public.Application):
'Start the IPA interactive Python console.'
def __call__(self):
code.interact(
'(Custom IPA interactive Python console)',
local=dict(api=self.api)
)
class KWCollector(object):
def __init__(self):
object.__setattr__(self, '_KWCollector__d', {})
def __setattr__(self, name, value):
if name in self.__d:
v = self.__d[name]
if type(v) is tuple:
value = v + (value,)
else:
value = (v, value)
self.__d[name] = value
object.__setattr__(self, name, value)
def __todict__(self):
return dict(self.__d)
class CLI(object):
__d = None
__mcl = None
def __init__(self, api):
self.__api = api
def __get_api(self):
return self.__api
api = property(__get_api)
def print_commands(self):
std = set(self.api.Command) - set(self.api.Application)
print '\nStandard IPA commands:'
for key in sorted(std):
cmd = self.api.Command[key]
self.print_cmd(cmd)
print '\nSpecial CLI commands:'
for cmd in self.api.Application():
self.print_cmd(cmd)
print ''
def print_cmd(self, cmd):
print ' %s %s' % (
to_cli(cmd.name).ljust(self.mcl),
cmd.doc,
)
def __contains__(self, key):
assert self.__d is not None, 'you must call finalize() first'
return key in self.__d
def __getitem__(self, key):
assert self.__d is not None, 'you must call finalize() first'
return self.__d[key]
def finalize(self):
api = self.api
api.register(help)
api.register(console)
api.finalize()
for a in api.Application():
a.set_application(self)
self.build_map()
def build_map(self):
assert self.__d is None
self.__d = dict(
(c.name.replace('_', '-'), c) for c in self.api.Command()
)
def run(self):
self.finalize()
if len(sys.argv) < 2:
self.print_commands()
print 'Usage: ipa COMMAND'
sys.exit(2)
key = sys.argv[1]
if key not in self:
self.print_commands()
print 'ipa: ERROR: unknown command %r' % key
sys.exit(2)
self.run_cmd(
self[key],
list(s.decode('utf-8') for s in sys.argv[2:])
)
def run_cmd(self, cmd, argv):
(args, kw) = self.parse(cmd, argv)
self.run_interactive(cmd, args, kw)
def run_interactive(self, cmd, args, kw):
for option in cmd.smart_option_order():
if option.name not in kw:
default = option.get_default(**kw)
if default is None:
prompt = '%s: ' % option.name
else:
prompt = '%s [%s]: ' % (option.name, default)
error = None
while True:
if error is not None:
print '>>> %s: %s' % (option.name, error)
raw = raw_input(prompt)
try:
value = option(raw, **kw)
if value is not None:
kw[option.name] = value
break
except errors.ValidationError, e:
error = e.error
cmd(*args, **kw)
def parse(self, cmd, argv):
parser = self.build_parser(cmd)
(kwc, args) = parser.parse_args(argv, KWCollector())
return (args, kwc.__todict__())
def build_parser(self, cmd):
parser = optparse.OptionParser(
usage='Usage: %%prog %s' % to_cli(cmd.name),
)
for option in cmd.Option():
parser.add_option('--%s' % to_cli(option.name),
metavar=option.type.name.upper(),
help=option.doc,
)
return parser
def __get_mcl(self):
"""
Returns the Max Command Length.
"""
if self.__mcl is None:
if self.__d is None:
return None
self.__mcl = max(len(k) for k in self.__d)
return self.__mcl
mcl = property(__get_mcl)
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