def _get_value(self,
entry: ConfigEntry,
section: str = "") -> Union[str, bool]:
"""Get an entry value from a configuration mapping.
Parameters
----------
entry : ConfigEntry
The entry to search
section : str
The section the entry belongs to
Returns
-------
value : Union[str, bool]
The entry value
"""
try:
if section:
value = self.config[section][entry.name]
else:
value = self.config[entry.name]
return entry.casted(value)
except KeyError:
if entry.default is not None:
return entry.default
msg = f"'{entry.name}' unset but no default specified"
if section:
msg += f" for section '{section}'"
raise ConfigError(msg)
def _get_fs(self):
try:
yield self.fs
except PermissionError as e:
raise ConfigError(
f"{e} - check configured Google Cloud Storage credentials"
)
def casted(self, value):
if self.cast is bool:
try:
value = strtobool(str(value))
except ValueError as e:
raise ConfigError(f"{self.name}: {e}")
return self.cast(value)
def _read_config(self, filename: str) -> Dict[str, Any]:
"""Read a configuration file from its path.
Parameters
----------
filename : str
The path of the configuration file
Returns
-------
configuration : Dict[str, str]
The mapping of configuration variables found in the file
"""
with open(filename) as f:
try:
return dict(toml.load(f))
except toml.TomlDecodeError as e:
raise ConfigError(f"failed to load config file '{filename}': {e}")
def _get_fs(self):
try:
yield self.fs
except PermissionError as e:
raise ConfigError(f"{e} - check configured Azure Blob credentials")