import tomllib
from typing import Any
from rics.misc import interpolate_environment_variables
from rics.paths import AnyPath, any_path_to_path
[docs]
def load_toml_file(
path: AnyPath,
*,
allow_interpolation: bool = False,
allow_nested: bool = False,
allow_blank: bool = False,
) -> dict[str, Any]:
"""Load a TOML file.
This function reads a TOML file with forced `UTF-8` encoding (as per the standard). It will optionally perform
environment variable value interpolation as well and replace matching names in the file (in-memory, the file will
not be changed or read more than once).
For details about the interpolation, see :func:`rics.misc.interpolate_environment_variables`.
Args:
path: Path to file.
allow_interpolation: If ``True``, perform env var value interpolation.
allow_blank: If ``False``, blank values are considered missing.
allow_nested: If ``False``, raise an error if variables are defined within the default value of other variables.
Returns:
A dict parsed from `path`.
"""
with any_path_to_path(path).open(encoding="UTF-8") as f:
toml_string = f.read()
if allow_interpolation:
toml_string = interpolate_environment_variables(toml_string, allow_nested=allow_nested, allow_blank=allow_blank)
return tomllib.loads(toml_string)
