crab submity --dryrun fails for CMSSW_12 in v3.211125

[belforte]

reference:
https://hypernews.cern.ch/HyperNews/CMS/get/computing-tools/6244/1.html

oddily it works with CMSSW_10

problem should come from

CRABClient/src/python/CRABClient/Commands/submit.py

Line 405 in b033ff0

command = 'sh CMSRunAnalysis.sh ' + opts

[belforte]

things are trickier than I though,
if I stop crab submit --dryrun just before that line, an run sh CMSRunAnalysis.sh in the directory which it created and with these two env vars

CRABClient/src/python/CRABClient/Commands/submit.py

Line 386 in b033ff0

os.environ.update({'CRAB3_RUNTIME_DEBUG': 'True', '_CONDOR_JOB_AD': 'Job.submit'})

then it works .
I suspect that the execution from --dryrun in not done in a clean environment, but n the CRABClient environment. So mixing a python3 CMSSW with a python2 WMCore.
Will try to make it clean.

[belforte]

looks like it was that !

[belforte]

still, I'd rather like an implementation based on preparelocal, where the environment is better controlled, tests are reproducible etc. ref #5114 (comment)