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introduce writeable_dir argparse type

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This commit is contained in:
Marijan Petričević 2022-01-25 10:21:33 +01:00
parent 7765670c8a
commit e17fcbc966
1 changed files with 5 additions and 5 deletions
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10
nixos/lib/test-driver/test_driver/__init__.py
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@ -33,18 +33,20 @@ class EnvDefault(argparse.Action):
setattr(namespace, self.dest, values)
def raise_if_not_writeable_dir(path: Path) -> None:
"""Raises an ArgumentTypeError if the given path isn't a writeable directory
def writeable_dir(arg: str) -> Path:
"""Raises an ArgumentTypeError if the given argument isn't a writeable directory
Note: We want to fail as early as possible if a directory isn't writeable,
since an executed nixos-test could fail (very late) because of the test-driver
writing in a directory without proper permissions.
"""
path = Path(arg)
if not path.is_dir():
raise argparse.ArgumentTypeError("{0} is not a directory".format(path))
if not os.access(path, os.W_OK):
raise argparse.ArgumentTypeError(
"{0} is not a writeable directory".format(path)
)
return path
def main() -> None:
@ -83,7 +85,7 @@ def main() -> None:
help="""The path to the directory where outputs copied from the VM will be placed.
By e.g. Machine.copy_from_vm or Machine.screenshot""",
default=Path.cwd(),
type=Path,
type=writeable_dir,
)
arg_parser.add_argument(
"testscript",
@ -95,8 +97,6 @@ def main() -> None:
args = arg_parser.parse_args()
raise_if_not_writeable_dir(args.output_directory)
if not args.keep_vm_state:
rootlog.info("Machine state will be reset. To keep it, pass --keep-vm-state")