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# $Header: /var/local/cvsroot/4Suite/Ft/Lib/CommandLine/Arguments.py,v 1.4 2005/04/13 23:41:04 jkloth Exp $
"""
Classes that support advanced arg processing for command-line scripts
Copyright 2004 Fourthought, Inc. (USA).
Detailed license and copyright information: http://4suite.org/COPYRIGHT
Project home, documentation, distributions: http://4suite.org/
"""
from CommandLineUtil import ArgumentError
REQUIRED = 1
OPTIONAL = 2
ZERO_OR_MORE = 3
ONE_OR_MORE = 4
class Argument:
def __init__(self, name, description, validationFunc=None):
self.name = name
self.description = description
self.validationFunc = validationFunc or (lambda x: x)
return
class RequiredArgument(Argument):
requirements = REQUIRED
def gen_command_line(self):
return self.name
def validate(self,cmd,args):
#Just the first
if not len(args):
raise ArgumentError(cmd,
"missing required argument '%s'" % self.name)
return self.validationFunc(args[0]),args[1:]
class OptionalArgument(Argument):
requirements = OPTIONAL
def gen_command_line(self):
return "[%s]" % (self.name)
def validate(self,cmd,args):
#Just the first, maybe
if len(args):
return self.validationFunc(args[0]),args[1:]
return None,[]
class ZeroOrMoreArgument(Argument):
requirements = ZERO_OR_MORE
def gen_command_line(self):
return "[%s]..." % (self.name)
def validate(self,cmd,args):
#We take the rest
eaten = map(lambda x,f=self.validationFunc:f(x),args)
return eaten,[]
class OneOrMoreArgument(Argument):
requirements = ONE_OR_MORE
def gen_command_line(self):
return "%s [%s]..." % (self.name, self.name)
def validate(self,cmd,args):
#We take the rest
if not len(args):
raise ArgumentError(cmd,
"missing required argument '%s'" % self.name)
eaten = map(lambda x,f=self.validationFunc:f(x),args)
return eaten,[]
## for cur_arg in cmd_args:
## if cur_arg[2] == '.':
## #A required arg
## if not len(cl_args):
## resArgs[cur_arg[0]] = self._translate_args(cur_arg[3],cur_arg[0],[cl_args[0]])[0]
## cl_args = cl_args[1:]
## elif cur_arg[2] == '?':
## if len(cl_args):
## resArgs[cur_arg[0]] = self._translate_args(cur_arg[3],cur_arg[0],[cl_args[0]])[0]
## cl_args = cl_args[1:]
## elif cur_arg[2] == '+':
## if not len(cl_args):
## raise ArgumentError("missing required argument '%s'" % cur_arg[0])
## resArgs[cur_arg[0]] = self._translate_args(cur_arg[3],cur_arg[0],cl_args)
## cl_args = []
## elif cur_arg[2] == '*':
## resArgs[cur_arg[0]] = self._translate_args(cur_arg[3],cur_arg[0],cl_args)
## cl_args = []
## command[2] = resArgs
## return 1
## def _translate_args(self,func,name,args):
## res = []
## for arg in args:
## try:
## res.append(func(arg))
## except:
## #import traceback
## #traceback.print_exc()
## raise ArgumentError('failed conversion for %s (%s)' % (arg, name))
## return res
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