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# Copyright 2022 The Pigweed 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
#
# https://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.
"""Configure Python IDE support for Pigweed projects."""
from collections import defaultdict
import os
from pathlib import Path
import platform
from typing import Dict, NamedTuple
_PYTHON_VENV_PATH = (
Path(os.path.expandvars('$_PW_ACTUAL_ENVIRONMENT_ROOT')) / 'pigweed-venv'
)
class _PythonPathsForPlatform(NamedTuple):
bin_dir_name: str = 'bin'
interpreter_name: str = 'python3'
# When given a platform (e.g. the output of platform.system()), this dict gives
# the platform-specific virtualenv path names.
_PYTHON_PATHS_FOR_PLATFORM: Dict[str, _PythonPathsForPlatform] = defaultdict(
_PythonPathsForPlatform
)
_PYTHON_PATHS_FOR_PLATFORM['Windows'] = _PythonPathsForPlatform(
bin_dir_name='Scripts', interpreter_name='pythonw.exe'
)
class PythonPaths:
"""Holds the platform-specific Python environment paths.
The directory layout of Python virtual environments varies among
platforms. This class holds the data needed to find the right paths
for a specific platform.
"""
def __init__(self, system=platform.system()):
(bin_dir_name, interpreter_name) = _PYTHON_PATHS_FOR_PLATFORM[system]
self.bin_dir = _PYTHON_VENV_PATH / bin_dir_name
self.interpreter = self.bin_dir / interpreter_name
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