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import io
from pathlib import Path
from dynaconf import default_settings
from dynaconf.constants import TOML_EXTENSIONS
from dynaconf.loaders.base import BaseLoader
from dynaconf.utils import object_merge
from dynaconf.vendor import toml
def load(obj, env=None, silent=True, key=None, filename=None):
"""
Reads and loads in to "obj" a single key or all keys from source file.
:param obj: the settings instance
:param env: settings current env default='development'
:param silent: if errors should raise
:param key: if defined load a single key, else load all in env
:param filename: Optional custom filename to load
:return: None
"""
loader = BaseLoader(
obj=obj,
env=env,
identifier="toml",
extensions=TOML_EXTENSIONS,
file_reader=toml.load,
string_reader=toml.loads,
)
loader.load(
filename=filename,
key=key,
silent=silent,
)
def write(settings_path, settings_data, merge=True):
"""Write data to a settings file.
:param settings_path: the filepath
:param settings_data: a dictionary with data
:param merge: boolean if existing file should be merged with new data
"""
settings_path = Path(settings_path)
if settings_path.exists() and merge: # pragma: no cover
with io.open(
str(settings_path), encoding=default_settings.ENCODING_FOR_DYNACONF
) as open_file:
object_merge(toml.load(open_file), settings_data)
with io.open(
str(settings_path),
"w",
encoding=default_settings.ENCODING_FOR_DYNACONF,
) as open_file:
toml.dump(encode_nulls(settings_data), open_file)
def encode_nulls(data):
"""TOML does not support `None` so this function transforms to '@none '."""
if data is None:
return "@none "
if isinstance(data, dict):
return {key: encode_nulls(value) for key, value in data.items()}
elif isinstance(data, (list, tuple)):
return [encode_nulls(item) for item in data]
return data
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