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#!/usr/bin/env python3
# Copyright 2020 The gRPC Authors
#
# Licensed 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.
"""Utility functions for build file generation scripts."""
import importlib.util
import os
import sys
import types
from typing import Any, List, Mapping, Union
def import_python_module(path: str) -> types.ModuleType:
"""Imports the Python file at the given path, returns a module object."""
module_name = os.path.basename(path).replace('.py', '')
spec = importlib.util.spec_from_file_location(module_name, path)
module = importlib.util.module_from_spec(spec)
sys.modules[module_name] = module
spec.loader.exec_module(module)
return module
class Bunch(dict):
"""Allows dot-accessible dictionaries."""
def __init__(self, d: Mapping):
dict.__init__(self, d)
self.__dict__.update(d)
def to_bunch(var: Any) -> Any:
"""Converts any kind of variable to a Bunch."""
if isinstance(var, list):
return [to_bunch(i) for i in var]
if isinstance(var, dict):
ret = {}
for k, v in list(var.items()):
if isinstance(v, (list, dict)):
v = to_bunch(v)
ret[k] = v
return Bunch(ret)
else:
return var
def merge_json(dst: Union[Mapping, List], add: Union[Mapping, List]) -> None:
"""Merges JSON objects recursively."""
if isinstance(dst, dict) and isinstance(add, dict):
for k, v in list(add.items()):
if k in dst:
if k.startswith('#'):
continue
merge_json(dst[k], v)
else:
dst[k] = v
elif isinstance(dst, list) and isinstance(add, list):
dst.extend(add)
else:
raise TypeError(
'Tried to merge incompatible objects %s %s\n\n%r\n\n%r' %
(type(dst).__name__, type(add).__name__, dst, add))
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