rdblue commented on code in PR #5488: URL: https://github.com/apache/iceberg/pull/5488#discussion_r946142266
########## python/pyiceberg/utils/config.py: ########## @@ -0,0 +1,130 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +import logging +import os +from typing import Any, List, Optional + +import yaml + +from pyiceberg.typedef import EMPTY_DICT, FrozenDict, RecursiveDict + +PYICEBERG = "pyiceberg__" +CATALOG = "catalog" +HOME = "HOME" +PYICEBERG_HOME = "PYICEBERG_HOME" +PYICEBERG_YML = ".pyiceberg.yml" + + +def _coalesce(lhs: Optional[Any], rhs: Optional[Any]) -> Optional[Any]: + return lhs or rhs + + +def _merge_config(lhs: RecursiveDict, rhs: RecursiveDict) -> RecursiveDict: + """merges right-hand side into the left-hand side""" + new_config = lhs.copy() + for rhs_key, rhs_value in rhs.items(): + if rhs_key in new_config: + lhs_value = new_config[rhs_key] + if isinstance(lhs_value, dict) and isinstance(rhs_value, dict): + # If they are both dicts, then we have to go deeper + new_config[rhs_key] = _merge_config(lhs_value, rhs_value) + else: + # Take the non-null value, with precedence on rhs + new_config[rhs_key] = _coalesce(rhs_value, lhs_value) + else: + # New key + new_config[rhs_key] = rhs_value + + return new_config + + +logger = logging.getLogger(__name__) + + +def _lowercase_dictionary_keys(input_dict: RecursiveDict) -> RecursiveDict: + """Lowers all the keys of a dictionary in a recursive manner, to make the lookup case-insensitive""" + return {k.lower(): _lowercase_dictionary_keys(v) if isinstance(v, dict) else v for k, v in input_dict.items()} + + +class Config: + config: RecursiveDict + + def __init__(self): + config = self._from_configuration_files() + config = _merge_config(config, self._from_environment_variables(config)) + self.config = FrozenDict(**config) + + @staticmethod + def _from_configuration_files() -> RecursiveDict: + """Looks up configuration files + + Takes preference over RecursiveDict that's close to the user + """ + config: RecursiveDict = {} + for directory in [os.environ.get(HOME), os.environ.get(PYICEBERG_HOME)]: Review Comment: Sounds great! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
