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b5749b1aab
Make sure references to python in shebangs and in text specify python3 rather than simply python. This better supports convention of fresh machines.
78 lines
2.2 KiB
Python
Executable File
78 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Simple front-end to the task-specific anod scripts contained in lib."""
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from e3.main import Main
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from argparse import SUPPRESS, ArgumentParser, _HelpAction
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class CustomHelpAction(_HelpAction):
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"""
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Custom help action for ArgumentParser.
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This action will defer printing help if it sees that the command positional
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argument has already been given and it is on the first pass. This allows
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more specific help to be retrieved by placing the the help option after the
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command argument.
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Once the first round of argument parsing is completely, call increment_pass
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"""
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def __init__(self, option_strings, dest=SUPPRESS, default=SUPPRESS, help=None):
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super(CustomHelpAction, self).__init__(
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option_strings=option_strings, dest=dest, default=default, help=help,
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)
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self.current_pass = 1
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def __call__(
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self, parser, namespace, values, option_string=None,
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):
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if self.current_pass > 1 or getattr(namespace, "command", None) is None:
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parser.print_help()
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parser.exit()
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def increment_pass(self) -> None:
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"""Increment the current pass number."""
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self.current_pass += 1
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if __name__ == "__main__":
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m = Main(argument_parser=ArgumentParser(add_help=False))
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command_arg = m.argument_parser.add_argument(
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"command",
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choices=["build", "printenv", "devel-setup"],
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help="the subcommand to be run.",
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)
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help_arg = m.argument_parser.add_argument(
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"-h", "--help", action=CustomHelpAction, help="show this help message and exit",
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)
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m.parse_args(known_args_only=True)
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# Now that we've parsed the command, we don't want it showing up in help
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# for the subcommands
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command_arg.help = SUPPRESS
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help_arg.increment_pass()
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if m.args.command == "build":
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from lib.anod_build import do_build
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exit(do_build(m))
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elif m.args.command == "printenv":
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from lib.anod_printenv import do_printenv
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exit(do_printenv(m))
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elif m.args.command == "devel-setup":
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from lib.anod_devel_setup import do_devel_setup
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exit(do_devel_setup(m))
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else:
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# cannot happen
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exit(4)
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