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#!/usr/bin/env python
# Copyright 2023 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.
"""Launcher and Connector for mock emulator"""
import json
import os
from pathlib import Path
from typing import Any, Optional, List, Union
import time
from pw_emu.core import (
Connector,
Launcher,
InvalidProperty,
InvalidPropertyPath,
)
# mock emulator script
_mock_emu = [
'python',
os.path.join(Path(os.path.dirname(__file__)).resolve(), 'mock_emu.py'),
]
def wait_for_file_size(
path: Union[os.PathLike, str], size: int, timeout: int = 5
) -> None:
deadline = time.monotonic() + timeout
while not os.path.exists(path):
if time.monotonic() > deadline:
break
time.sleep(0.1)
while os.path.getsize(path) < size:
if time.monotonic() > deadline:
break
time.sleep(0.1)
class MockEmuLauncher(Launcher):
"""Launcher for mock emulator"""
def __init__(
self,
config_path: Path,
):
super().__init__('mock-emu', config_path)
self._wdir: Optional[Path] = None
self.log = True
def _pre_start(
self,
target: str,
file: Optional[Path] = None,
pause: bool = False,
debug: bool = False,
args: Optional[str] = None,
) -> List[str]:
channels = []
if self._config.get_target(['pre-start-cmds']):
self._handles.add_channel_tcp('test_subst_tcp', 'localhost', 1234)
self._handles.add_channel_pty('test_subst_pty', 'pty-path')
if self._config.get_emu(['gdb_channel']):
channels += ['--tcp-channel', 'gdb']
if self._config.get_emu(['tcp_channel']):
channels += ['--tcp-channel', 'tcp']
if self._config.get_emu(['pty_channel']):
channels += ['--pty-channel', 'pty']
if len(channels) > 0:
channels += ['--working-dir', str(self._wdir)]
return _mock_emu + channels + ['starting mock emulator']
def _post_start(self) -> None:
if not self._wdir:
return
if self._config.get_emu(['gdb_channel']):
path = os.path.join(self._wdir, 'gdb')
wait_for_file_size(path, 5, 5)
with open(path, 'r') as file:
port = int(file.read())
self._handles.add_channel_tcp('gdb', 'localhost', port)
if self._config.get_emu(['tcp_channel']):
path = os.path.join(self._wdir, 'tcp')
wait_for_file_size(path, 5, 5)
with open(path, 'r') as file:
port = int(file.read())
self._handles.add_channel_tcp('tcp', 'localhost', port)
if self._config.get_emu(['pty_channel']):
path = os.path.join(self._wdir, 'pty')
wait_for_file_size(path, 5, 5)
with open(path, 'r') as file:
pty_path = file.read()
self._handles.add_channel_pty('pty', pty_path)
def _get_connector(self, wdir: Path) -> Connector:
return MockEmuConnector(wdir)
class MockEmuConnector(Connector):
"""Connector for mock emulator"""
_props = {
'path1': {
'prop1': 'val1',
}
}
def reset(self) -> None:
Path(os.path.join(self._wdir, 'reset')).touch()
def cont(self) -> None:
Path(os.path.join(self._wdir, 'cont')).touch()
def list_properties(self, path: str) -> List[Any]:
try:
return list(self._props[path].keys())
except KeyError:
raise InvalidPropertyPath(path)
def set_property(self, path: str, prop: str, value: str) -> None:
if not self._props.get(path):
raise InvalidPropertyPath(path)
if not self._props[path].get(prop):
raise InvalidProperty(path, prop)
self._props[path][prop] = value
with open(os.path.join(self._wdir, 'props.json'), 'w') as file:
json.dump(self._props, file)
def get_property(self, path: str, prop: str) -> Any:
try:
with open(os.path.join(self._wdir, 'props.json'), 'r') as file:
self._props = json.load(file)
except OSError:
pass
if not self._props.get(path):
raise InvalidPropertyPath(path)
if not self._props[path].get(prop):
raise InvalidProperty(path, prop)
return self._props[path][prop]
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