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import argparse
import sys
class VstfHelpFormatter(argparse.HelpFormatter):
def start_section(self, heading):
# Title-case the headings
heading = '%s%s' % (heading[0].upper(), heading[1:])
super(VstfHelpFormatter, self).start_section(heading)
class VstfParser(argparse.ArgumentParser):
def __init__(self,
prog='vstf',
description="",
epilog='',
add_help=True,
formatter_class=VstfHelpFormatter):
super(VstfParser, self).__init__(
prog=prog,
description=description,
epilog=epilog,
add_help=add_help,
formatter_class=formatter_class)
self.subcommands = {}
def _find_actions(self, subparsers, actions_module):
for attr in (a for a in dir(actions_module) if a.startswith('do_')):
command = attr[3:].replace('_', '-')
callback = getattr(actions_module, attr)
desc = callback.__doc__ or ''
action_help = desc.strip()
arguments = getattr(callback, 'arguments', [])
subparser = subparsers.add_parser(command,
help=action_help,
description=desc,
add_help=False,
formatter_class=VstfHelpFormatter)
subparser.add_argument('-h', '--help',
action='help',
help=argparse.SUPPRESS)
self.subcommands[command] = subparser
for (args, kwargs) in arguments:
subparser.add_argument(*args, **kwargs)
subparser.set_defaults(func=callback)
def set_subcommand_parser(self, target, metavar="<subcommand>"):
subparsers = self.add_subparsers(metavar=metavar)
self._find_actions(subparsers, target)
return subparsers
def set_parser_to_subcommand(self, subparser, target):
self._find_actions(subparser, target)
if __name__ == "__main__":
from vstf.common import test_func
parser = VstfParser(prog="vstf", description="test parser")
parser.set_subcommand_parser(test_func)
args = parser.parse_args(sys.argv[1:])
args.func(args)
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