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Merge branch '70-log-warn-if-shared-lib-cannot-be-found-by-ldpreload-action' into 'master'

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Add logs for LdPreload action on success or failure

Closes #70

See merge request micro-ROS/ros_tracing/ros2_tracing!154
This commit is contained in:
Christophe Bedard 2020-03-07 19:02:13 +00:00
commit 3614312c4e
1 changed files with 6 additions and 1 deletions
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7
tracetools_launch/tracetools_launch/actions/ld_preload.py
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@ -19,6 +19,7 @@ from typing import List
from typing import Optional
from typing import Union
from launch import logging
from launch.action import Action
from launch.actions import SetEnvironmentVariable
from launch.launch_context import LaunchContext
@ -38,19 +39,23 @@ class LdPreload(Action):
"""
Create an LdPreload action.
:param lib_name: the name of the library
:param lib_name: the name of the library (e.g. 'lib.so')
"""
super().__init__(**kwargs)
self.__lib_name = lib_name
self.__set_env_action = None
self.__logger = logging.get_logger(__name__)
# Try to find lib
self.__lib_path = self.get_shared_lib_path(self.__lib_name)
# And create action if found
if self.__lib_path is not None:
self.__logger.debug(f'Shared library found at: {self.__lib_path}')
self.__set_env_action = SetEnvironmentVariable(
self.ENV_VAR_LD_PRELOAD,
self.__lib_path,
)
else:
self.__logger.warn(f'Could not find shared library: {self.__lib_name}')
def lib_found(self) -> bool:
return self.__set_env_action is not None