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'''Option parsing library for utilities'''
__revision__ = '$Revision$'
import getopt, os, socket, sys, ConfigParser
def bool_cook(x):
if x:
return True
else:
return False
class OptionFailure(Exception):
pass
class Option(object):
cfpath = '/etc/bcfg2.conf'
__cfp = False
def getCFP(self):
if not self.__cfp:
self.__cfp = ConfigParser.ConfigParser()
self.__cfp.readfp(open(self.cfpath))
return self.__cfp
cfp = property(getCFP)
def getValue(self):
if self.cook:
return self.cook(self._value)
else:
return self._value
value = property(getValue)
def __init__(self, desc, default, cmd=False, odesc=False,
env=False, cf=False, cook=False):
self.desc = desc
self.default = default
self.cmd = cmd
if cmd and (cmd[0] != '-' or len(cmd) != 2):
raise OptionFailure("Poorly formed command %s" % cmd)
self.odesc = odesc
self.env = env
self.cf = cf
self.cook = cook
def buildHelpMessage(self):
msg = ''
if self.cmd:
msg = self.cmd.ljust(3)
if self.odesc:
msg += ':%-24s' % (self.odesc)
msg += "%s\n" % self.desc
return msg
def buildGetopt(self):
gstr = ''
if self.cmd:
gstr = self.cmd[1]
if self.odesc:
gstr += ':'
return gstr
def parse(self, opts, rawopts):
if self.cmd and opts:
# processing getopted data
optinfo = [opt[1] for opt in opts if opt[0] == self.cmd]
if optinfo:
if optinfo[0]:
self._value = optinfo[0]
else:
self._value = True
return
if self.cmd and self.cmd in rawopts:
self._value = rawopts[rawopts.index(self.cmd) + 1]
return
# no command line option found
if self.env and self.env in os.environ:
self._value = os.environ[self.env]
return
if self.cf:
try:
self._value = self.cfp.get(*self.cf)
return
except:
pass
self._value = self.default
class OptionSet(dict):
def buildGetopt(self):
return ''.join([opt.buildGetopt() for opt in self.values()])
def buildHelpMessage(self):
return ''.join([opt.buildHelpMessage() for opt in self.values()])
def helpExit(self, msg='', code=1):
if msg:
print msg
print "Usage:"
print self.buildHelpMessage()
raise SystemExit(code)
def parse(self, argv, do_getopt=True):
'''Parse options'''
ret = {}
if do_getopt:
try:
opts, args = getopt.getopt(argv, self.buildGetopt(), [])
except getopt.GetoptError, err:
self.helpExit(err)
if '-h' in argv:
self.helpExit('', 0)
for key in self.keys():
option = self[key]
if do_getopt:
option.parse(opts, [])
else:
option.parse([], argv)
if hasattr(option, '_value'):
val = option.value
self[key] = val
list_split = lambda x:x.replace(' ','').split(',')
CFILE = Option('Specify configuration file', '/etc/bcfg2.conf', cmd='-C',
odesc='<conffile>')
HELP = Option('Print this usage message', False, cmd='-h')
DEBUG = Option("Enable debugging output", False, cmd='-d')
VERBOSE = Option("Enable verbose output", False, cmd='-v')
DAEMON = Option("Daemonize process, storing pid", False,
cmd='-D', odesc="<pidfile>")
SERVER_REPOSITORY = Option('Server repository path', '/var/lib/bcfg2',
cf=('server', 'repository'), cmd='-Q',
odesc='<repository path>' )
SERVER_SVN = Option('Server svn support', False, cf=('server', 'svn'))
SERVER_GENERATORS = Option('Server generator list', cf=('server', 'generators'),
default='SSHbase,Cfg,Pkgmgr,Rules', cook=list_split)
SERVER_STRUCTURES = Option('Server structure list', cf=('server', 'structures'),
default='Bundler,Base', cook=list_split)
SERVER_LOCATION = Option('Server Location', cf=('components', 'bcfg2'),
default=(socket.gethostname(), 0), cmd='-S',
odesc='https://server:port')
SERVER_STATIC = Option('Server runs on static port', cf=('components', 'bcfg2'),
default='', cook=bool_cook)
SERVER_KEY = Option('Path to SSL key', cf=('communication', 'key'),
default=False)
SERVER_PASSWORD = Option('Communication Password', cmd='-x',
cf=('communication', 'password'), default=False)
INSTALL_PREFIX = Option('Installation location', cf=('server', 'prefix'),
default='/usr')
SERVER_PROTOCOL = Option('Server Protocol', cf=('communication', 'procotol'),
default='xmlrpc/ssl')
SENDMAIL_PATH = Option('Path to sendmail', cf=('reports', 'sendmailpath'),
default='/usr/lib/sendmail')
class OptionParser(OptionSet):
'''OptionParser bootstraps option parsing, getting the value of the config file'''
def __init__(self, args):
self.Bootstrap = OptionSet([('configfile', CFILE)])
self.Bootstrap.parse(sys.argv[1:], do_getopt=False)
if self.Bootstrap['configfile'] != Option.cfpath:
Option.cfpath = self.Bootstrap['configfile']
Option.__cfp = False
OptionSet.__init__(self, args)
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