27 lines
1.1 KiB
Python
27 lines
1.1 KiB
Python
# Safely load fast C Yaml loader/dumper if they are available
|
|
try:
|
|
from yaml import CSafeLoader as Loader
|
|
except ImportError:
|
|
from yaml import SafeLoader as Loader # type: ignore[assignment, misc]
|
|
|
|
try:
|
|
from yaml import CSafeDumper as Dumper
|
|
except ImportError:
|
|
from yaml import SafeDumper as Dumper # type: ignore[assignment, misc]
|
|
YamlDumper = Dumper
|
|
|
|
|
|
# A custom loader for YAML that errors on duplicate keys.
|
|
# This doesn't happen by default: see https://github.com/yaml/pyyaml/issues/165
|
|
class YamlLoader(Loader):
|
|
def construct_mapping(self, node, deep=False): # type: ignore[no-untyped-def]
|
|
mapping = []
|
|
for key_node, value_node in node.value:
|
|
key = self.construct_object(key_node, deep=deep) # type: ignore[no-untyped-call]
|
|
assert (
|
|
key not in mapping
|
|
), f"Found a duplicate key in the yaml. key={key}, line={node.start_mark.line}"
|
|
mapping.append(key)
|
|
mapping = super().construct_mapping(node, deep=deep) # type: ignore[no-untyped-call]
|
|
return mapping
|