Allow datafiles entries in user_nl_datm_streams to have the "%" wildcard syntax

[ekluzek]

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Inside the stream_definition xml file wildcards can be used to fill in filenames with year/date type forms. For example %ym gets expanded to the year and month in the form YYYY-MM. Since, the only way to directly change the list of files is through user_nl_datm_streams adding this functionality would prevent having users to create long lists of filenames (and prevent them making mistakes in those long lists). Since, it's common to have monthly files for many decades, filelists can be hundreds of lines long so it's difficult to maintain such long lists by hand. Since daily file lists are also possible that's even more difficult. So adding this capability would be a useful feature for CTSM developers working with these long lists.

We learned about this in our presentation to the CTSM scientists on the changes coming in for the NUOPC driver.

This would probably only apply to particular entries (maybe only datafiles).

[ekluzek]

I did check for kicks and as I suspected it doesn't interpret the % syntax when it comes in from user_nl_datm_streams (in cdeps.0.12.26)

[ekluzek]

Note, this is a request for a new capability that wasn't part of MCT. The only way to do this in MCT was to copy the namelist_definition xml file to the case directory. You could just include the part of it that you needed to override -- but I don't think this was commonly done except for me.

[ekluzek]

An example of why this would be helpful is here:

https://github.com/ESCOMP/CTSM/issues/1701

In the above example files are only yearly. But, cases where files are monthly (or even more frequent) are even more unwieldy.