def get_path_list(cls, paths: KGTKFiles, who: str, default_stdio: bool)->typing.List[Path]:
# Builds a list of paths from the awkward possible returns from argument parsing.
if paths is None:
if default_stdio:
return [ Path("-") ]
else:
return [ ]
elif isinstance(paths, Path):
return [ paths ]
elif isinstance(paths, list):
result: typing.List[Path] = [ ]
pl: typing.Union[typing.Optional[Path], typing.List[Path]]
for pl in paths:
if pl is None:
continue
if isinstance(pl, Path):
result.append(pl)
elif isinstance(pl, list):
result.extend(pl)
else:
raise KGTKArgumentParseException("%s: Unexpected component '%s' in path list '%s'." % (who, str(pl), str(paths)))
if len(result) == 0 and default_stdio:
return [ Path("-") ]
else:
return result
else:
raise KGTKArgumentParseException("%s: Unexpected path list '%s'." % (who, str(paths)))
def get_output_file(cls,
paths: KGTKFiles,
who: typing.Optional[str] = None,
default_stdout: bool = True,
)->Path:
if who is None:
who = cls.DEFAULT_OUTPUT_FILE_WHO
p: typing.List[Path] = cls.get_path_list(paths, who, default_stdio=default_stdout)
if len(p) == 1:
return p[0]
elif len(p) == 0:
raise KGTKArgumentParseException("%s: Please supply a filename path." % who)
else:
raise KGTKArgumentParseException("%s: Too many files: '%s'" % (who, str(paths)))
def optional_bool(value) -> typing.Optional[bool]:
if value is None:
return None
if isinstance(value, bool):
return value
if value.lower() in {'false', 'f', '0', 'no', 'n'}:
return False
elif value.lower() in {'true', 't', '1', 'yes', 'y'}:
return True
raise KGTKArgumentParseException(f'{value} is not a valid boolean value')
def get_optional_output_file(cls,
paths: KGTKFiles,
who: typing.Optional[str] = None,
)->typing.Optional[Path]:
if who is None:
who = cls.DEFAULT_OUTPUT_FILE_WHO
p: typing.List[Path] = cls.get_path_list(paths, who, default_stdio=False)
if len(p) == 0:
return None
elif len(p) == 1:
return p[0]
else:
raise KGTKArgumentParseException("%s: Too many files: '%s'" % (who, str(paths)))