@@ -31,34 +31,28 @@ def create_backend(path: str) -> QAPIBackend:
module_path, dot, class_name = path.rpartition('.')
if not dot:
- print("argument of -B must be of the form MODULE.CLASS",
- file=sys.stderr)
- sys.exit(1)
+ raise QAPIError("argument of -B must be of the form MODULE.CLASS")
try:
mod = import_module(module_path)
except Exception as ex:
- print(f"unable to import '{module_path}': {ex}", file=sys.stderr)
- sys.exit(1)
+ raise QAPIError(f"unable to import '{module_path}': {ex}") from ex
try:
klass = getattr(mod, class_name)
- except AttributeError:
- print(f"module '{module_path}' has no class '{class_name}'",
- file=sys.stderr)
- sys.exit(1)
+ except AttributeError as ex:
+ raise QAPIError(
+ f"module '{module_path}' has no class '{class_name}'") from ex
try:
backend = klass()
except Exception as ex:
- print(f"backend '{path}' cannot be instantiated: {ex}",
- file=sys.stderr)
- sys.exit(1)
+ raise QAPIError(
+ f"backend '{path}' cannot be instantiated: {ex}") from ex
if not isinstance(backend, QAPIBackend):
- print(f"backend '{path}' must be an instance of QAPIBackend",
- file=sys.stderr)
- sys.exit(1)
+ raise QAPIError(
+ f"backend '{path}' must be an instance of QAPIBackend")
return backend
create_backend()'s caller catches QAPIError, and returns non-zero exit code on catch. The caller's caller passes the exit code to sys.exit(). create_backend() doesn't care: it reports errors to stderr and sys.exit()s. Change it to raise QAPIError instead. Signed-off-by: Markus Armbruster <armbru@redhat.com> --- scripts/qapi/main.py | 24 +++++++++--------------- 1 file changed, 9 insertions(+), 15 deletions(-)