mirror of
https://github.com/yavook/kiwi-scp.git
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66 lines
1.9 KiB
Python
66 lines
1.9 KiB
Python
# system
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import argparse
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# local
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from ._constants import COMMAND_HELP_TEXT_NAME, KIWI_HELP_TEXT_NAME
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class Parser:
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"""Singleton: Main CLI arguments parser"""
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class __Parser:
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"""Singleton type"""
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# argparse objects
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__parser = None
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__subparsers = None
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__args = None
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def __init__(self):
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# add version data from separate file (keeps default config cleaner)
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with open(KIWI_HELP_TEXT_NAME, 'r') as stream:
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kiwi_help = stream.read()
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with open(COMMAND_HELP_TEXT_NAME, 'r') as stream:
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command_help_text = stream.read()
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# create main parser
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self.__parser = argparse.ArgumentParser(
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prog='kiwi',
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description=kiwi_help,
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epilog=command_help_text,
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)
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self.__parser.formatter_class = argparse.RawDescriptionHelpFormatter
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# main arguments
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self.__parser.add_argument(
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'-v', '--verbosity',
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action='count', default=0
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)
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# attach subparsers
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self.__subparsers = self.__parser.add_subparsers()
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self.__subparsers.required = True
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self.__subparsers.dest = 'command'
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def get_subparsers(self):
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return self.__subparsers
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def get_args(self):
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if self.__args is None:
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# parse args if needed
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self.__args, unknowns = self.__parser.parse_known_args()
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self.__args.unknowns = unknowns
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return self.__args
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__instance = None
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def __init__(self):
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if Parser.__instance is None:
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# create singleton
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Parser.__instance = Parser.__Parser()
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def __getattr__(self, item):
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"""Inner singleton direct access"""
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return getattr(self.__instance, item)
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