Executors types

[InvincibleRMC]

A redo of #1345 . Assuming this doesn't trigger the mysterious ros2cli flake8 seg fault it should be fine to merge.

[InvincibleRMC]

@fujitatomoya Since the rhel flake8 seg faults have been fixed can we re-run CI and merge this back in? This should be the same as #1345 which already has approval.

[clalancette]

@fujitatomoya Since the rhel flake8 seg faults have been fixed can we re-run CI and merge this back in? This should be the same as #1345 which already has approval.

To be clear; they are not fixed. They are appearing every night, i.e. https://ci.ros2.org/view/nightly/job/nightly_linux-rhel_release/2086/testReport/ . But I guess at this point it isn't any particular thing we are doing here.

[InvincibleRMC]

@fujitatomoya Since the rhel flake8 seg faults have been fixed can we re-run CI and merge this back in? This should be the same as #1345 which already has approval.

To be clear; they are not fixed. They are appearing every night, i.e. https://ci.ros2.org/view/nightly/job/nightly_linux-rhel_release/2086/testReport/ . But I guess at this point it isn't any particular thing we are doing here.

Oh my apologies I saw ros2/ros2cli#932 was closed and assumed it had all been resolved.

[clalancette]

Oh my apologies I saw ros2/ros2cli#932 was closed and assumed it had all been resolved.

No worries. It has popped back up, but I have no idea what causes it or what we should do next. ament/ament_lint#505 fixes it, but is really not ideal. If I have some time this afternoon I might poke at it again.