def split_legacy_spec(cmdspec):
"""
Split a legacy specification object into pargs, kwargs, and flags
"""
kwargs = {}
for kwarg, subspec in cmdspec.items():
if kwarg in cmdspec.flags:
continue
if kwarg in ("if", "elseif", "while"):
subparser = parser.parse_conditional
elif kwarg == "COMMAND":
subparser = parser.parse_shell_command
elif isinstance(subspec, parser.IMPLICIT_PARG_TYPES):
subparser = parser.StandardParser(subspec)
elif isinstance(subspec, (commands.CommandSpec)):
subparser = get_legacy_parse(subspec)
else:
raise ValueError("Unexpected kwarg spec of type {}".format(
type(subspec)))
kwargs[kwarg] = subparser
return cmdspec.pargs, kwargs, cmdspec.flags
def get_legacy_parse(cmdspec):
"""
Construct a parse tree from a legacy command specification
"""
pargs, kwargs, flags = split_legacy_spec(cmdspec)
return parser.StandardParser(pargs, kwargs, flags)