cylc set-verbosity does not set CYLC_DEBUG

[dpmatthews]

If I run a workflow using --debug then in the job scripts I get export CYLC_VERBOSE=true and export CYLC_DEBUG=true. However, if I run the workflow at normal verbosity and then set it to debug using cylc set-verbosity only CYLC_VERBOSE gets set to true in the job scripts (CYLC_DEBUG remains false).

--debug is defined as equivalent to -v -v in the cylc play help (i.e. it is just a verbosity level) so I would expect cylc set-verbosity DEBUG to result in export CYLC_DEBUG=true in the job scripts.

[oliver-sanders]

Context:

In debug mode the CYLC_DEBUG environment variable gets set to true which turns on some extra debugging.

The following two commands are identical:

$ cylc <command> -v -v
$ cylc <command> --deubg

The cylc set-verbosity command allows you to change the verbosity argument whilst the scheduler is running.

This is the code that gets run as a result of a cylc set-verbosity call:

cylc-flow/cylc/flow/scheduler.py

Lines 1068 to 1075 in b134297

	def command_set_verbosity(lvl: Union[int, str]) -> None:
	"""Set workflow verbosity."""
	try:
	lvl = int(lvl)
	LOG.setLevel(lvl)
	except (TypeError, ValueError) as exc:
	raise CommandFailedError(exc)
	cylc.flow.flags.verbosity = log_level_to_verbosity(lvl)

This is the code that turns the verbosity into the CYLC_DEBUG environment variable:

cylc-flow/cylc/flow/job_file.py

Lines 176 to 177 in b134297

	for key, value in verbosity_to_env(cylc.flow.flags.verbosity).items():
	handle.write(f'\nexport {key}={value}')

[oliver-sanders]

Minimal example to test:

[scheduling]
    [[graph]]
        R1 = test

[runtime]
    [[test]]
         script = echo "CYLC_DEBUG=$CYLC_DEBUG"

[oliver-sanders]

Closed by #5854