kiwi-scp/src/kiwi/parser.py

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# system
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import argparse
class Parser:
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"""Singleton: Main CLI arguments parser"""
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class __Parser:
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"""Singleton type"""
# argparse objects
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__parser = None
__subparsers = None
__args = None
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def __init__(self):
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# create main parsers
self.__parser = argparse.ArgumentParser(
description='kiwi-config'
)
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# main arguments
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self.__parser.add_argument(
'-v', '--verbosity',
action='count', default=0
)
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# attach subparsers
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self.__subparsers = self.__parser.add_subparsers()
self.__subparsers.required = True
self.__subparsers.dest = 'command'
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def get_subparsers(self):
return self.__subparsers
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def get_args(self):
if self.__args is None:
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# parse args if needed
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self.__args = self.__parser.parse_args()
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return self.__args
__instance = None
def __init__(self):
if Parser.__instance is None:
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# create singleton
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Parser.__instance = Parser.__Parser()
def __getattr__(self, item):
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"""Inner singleton direct access"""
return getattr(self.__instance, item)