EXPID and EXPDSC are required by Cap

[mathomp4]

So this is fun. Recently I know @gmao-rreichle asked if HISTORY.rc-like files really needed EXPID: and EXPDSC: in them. And I think @bena-nasa and @weiyuan-jiang looked at History in MAPL and said, no, probably not.

But then @biljanaorescanin tried running GEOSldas with those missing and found out that Cap apparently requires them:

MAPL/gridcomps/Cap/MAPL_CapGridComp.F90

Lines 493 to 504 in 136821e

	call ESMF_ConfigGetAttribute(cap%cf_hist, value=EXPID, Label="EXPID:", rc=status)
	_VERIFY(STATUS)
	call ESMF_ConfigGetAttribute(cap%cf_hist, value=EXPDSC, Label="EXPDSC:", rc=status)
	_VERIFY(STATUS)
	call MAPL_ConfigSetAttribute(cap%cf_hist, value=heartbeat_dt, Label="RUN_DT:", rc=status)
	_VERIFY(STATUS)
	call MAPL_ConfigSetAttribute(cap%cf_root, value=EXPID, Label="EXPID:", rc=status)
	_VERIFY(STATUS)
	call MAPL_ConfigSetAttribute(cap%cf_root, value=EXPDSC, Label="EXPDSC:", rc=status)
	_VERIFY(STATUS)

It grabs them from the cap%cf_hist and puts them in cap%cf_root.

My guess is some ESMF magic could be done to make these optional a la:

call ESMF_ConfigFindLabel(cap%cf_hist, label="EXPID:", isPresent=isPresent, rc=status)
if (isPresent)
   call ESMF_ConfigGetAttribute(cap%cf_hist, value=EXPID,  Label="EXPID:",  rc=status)
end if

And then something similar when it's set in cap%cf_root?

[gmao-rreichle]

Thanks, @mathomp4. FYI, for now we're just keeping EXPDSC: and EXPSRC: in the GEOSldas HIST template, see GEOS-ESM/GEOSldas#465
If you decide to make them optional, we can remove them from the GEOSldas HIST template once GEOSldas catches up with the corresponding MAPL tag.
The challenge will be to remember to do so...

[mathomp4]

@bena-nasa or @atrayano Do you know why cap%cf_root might need these? Maybe William's NUOPC work?

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[gmao-rreichle]

@mathomp4, does this issue still apply to recent editions of MAPL?

[mathomp4]

@gmao-rreichle I believe it still might only because I can't remember any updates changing this. Probably hasn't been top priority, but I'll bring it up with the team on Monday.