Problems running LFRic Apps on monsoon - export source fails

[stephenpcook]

Running LFRic Apps on monsoon fails at the export-source task unless I change the cylc template to use module scitools/production-os45-1 instead of the default scitools.

Steps to reproduce

On xcsc:

fcm co fcm:lfric_apps.x/trunk@vn1.2 lfric_apps_vn1_2
export CYLC_VERSION=8
cd lfric_apps_vn1_2/
rose stem -g gungho_model_exo-dhj-C24_MG_xc40_intel_fast-debug-64bit
cylc validate lfric_apps_vn1_2
cylc play lfric_apps_vn1_2

The cylc TUI reveals that the export-source tasks fails with the message (in cylc-run/lfric_apps_vn1_2/runN/log/job/1/export-source/01/job.err)

  File "/common/scitools/environments/default/2021_03_18-1/lib/python3.6/subprocess.py", line 403, in run
    with Popen(*popenargs, **kwargs) as process:
TypeError: __init__() got an unexpected keyword argument 'capture_output'
[FAIL] export_source.py # return-code=1
2024-11-20T16:02:45Z CRITICAL - failed/ERR

This task failing doesn't stop the cylc play, but no extra tasks are kicked off from this point.

My ~/.metomi/rose.conf includes the automatic-options SITE=meto and PLATFORM=meto-xc40-intel.

Investigation

It seems that this is caused because the default scitools module has python 3.6 but the capture_output argument was introduced in python 3.7.

I can solve this by modifying the METO_ORIG cylc template, as per lfric_apps@4907 (the line remove in the commit from suite_common_xc40.cylc was from a previous attempt to get it working).
The export-source then runs to completion.