Git commit when running from different directory

[erwinlambert]

This only returns the actual commit of the UPSY-models repo when the run script is in the correct folder.

In my case, I run the model from a folder in another repo: mpirun ../UPSY-models/UFEMISM_program, which returns the git commit of that other repo. For reproducibility of future runs, best to ensure this is consistent.

[TijnBerends]

Oof... this is currently done with a few sneaky little 'call system('...'') commands in Upsy, which ask git for its commit hash, saves it into a text file, and then reads that text file. This indeed assumes the program is being run from inside UPSY-models. I don't know how to work around this when this is not the case, as there's not really a way for the program to know where on your disk its source code is located.

Maybe I could add some code to the compile script to query the git commit hash, hard-code it into a little .f90 file, and then compile it into the executable?

[erwinlambert]

Woh I think that's actually the best option. Because currently, there may be 'uncommitted changes' which aren't compiled. Useful as a warning flag for the user, but not really relevant for reproducibility. And I think compiling will/should always be done from the UPSY-models repo itself.

[erwinlambert]

(I produced some LARMIP-style response functions which are used in EC-Earth, and was glad I happened to add a tag to that version, otherwise I wouldn't have been able to trace back the commit. So this is actually a relevant feature and not just a nice gimmick :) )