Add context methods to LoKi::Hybrid::GenEngine

Follows !1549 (merged), adding back support for LoKi functors under the GenEngine actor (used in generator-level cuts).

Closes LHCBGAUSS-1833.

/cc @ibelyaev

added Simulation lhcb-head labels

added bug fix label

• [2020-01-29 00:07] Validation started with lhcb-head#2496

Could we please add a test that demonstrates the bug and the fix?

added 1 commit

• 51d81576 - Add context methods to LoKi::Hybrid::GenEngine.

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resolved all threads

removed lhcb-head label

I took a quick look at Gauss qmtests failing due to this and it seems that is works, since one test is successful (https://lhcb-nightlies.web.cern.ch/logs/tests/nightly/lhcb-head/2496/x86_64-centos7-gcc9-opt/Gauss/#all_47) and the other fails due to a time-out (https://lhcb-nightlies.web.cern.ch/logs/tests/nightly/lhcb-head/2496/x86_64-centos7-gcc9-opt/Gauss/#all_49) and normally the failure is at initialisation as it can be seen in a different slot (https://lhcb-nightlies.web.cern.ch/logs/tests/nightly/lhcb-gaudi-head/2517/x86_64-centos7-gcc9-opt/Gauss/#all_47)

I would like this to be deployed in the next version of LHCb since the plan is to use that for the release of Gauss v54r0 for Sim10 and upgrade

approved this merge request

great, let's merge this straight away!

unassigned @dmuller

mentioned in commit 37bc7e4a

merged

The test I added this morning hasn't gone through a nightly cycle, but I tested it locally so it's probably fine I'll check things tomorrow morning.

mentioned in issue Gauss#1 (closed)

added highlight label

@apearce this breaks with Python3, see https://lhcb-nightlies.web.cern.ch/logs/tests/nightly/lhcb-gaudi-head-py3/298/x86_64-centos7-gcc9-opt/LHCb/#failures_533

Is there a way it can be fixed to work with both Python2 and Python3?

It's this specific line that breaks? Yes, this just needs wrapping.

print(print "Algorithm, GSOURCE =", GSOURCE)

I did patch HybridBase to import the print function, so the change here will also produce an error in a Python 2 build. (Thinking about it, we should have a Python 2 build for the Python 3 MR!)