Some Standard Output missing when emulate_tty is not specified. When it is specified...
Error with XML launch file:
[ERROR] [launch]: Caught exception in launch (see debug for traceback): Caught exception when trying to load file of format [xml]: Unexpected attribute(s) found in `node`: {'emulate_tty'}
Error with YAML launch file:
[ERROR] [launch]: Caught exception in launch (see debug for traceback): Caught exception when trying to load file of format [yml]: Unexpected key(s) found in `node`: {'emulate_tty'}
Comment
While the ROS2 documentation states that some lower-level functionality may only be accessible through Python, I feel that the ability to reliably display Standard Output should be included as a common feature across all launch file types.
Given that many users will be migrating from ROS1 where they were familiar with XML type launch files and might feel inclined to continue to use them, this undocumented lack of functionality is very likely to trip them up.
Bug report
Required Info:
Steps to reproduce issue
Run the following launch files:
Expected behavior
Standard Output is properly displayed.
Actual behavior
Some Standard Output missing when
emulate_tty
is not specified. When it is specified...Error with XML launch file:
Error with YAML launch file:
Comment
While the ROS2 documentation states that some lower-level functionality may only be accessible through Python, I feel that the ability to reliably display Standard Output should be included as a common feature across all launch file types.
Given that many users will be migrating from ROS1 where they were familiar with XML type launch files and might feel inclined to continue to use them, this undocumented lack of functionality is very likely to trip them up.