move reading in REMIND fuel costs to mrtransport

[fbenke-pik]

Purpose of this PR

Remove the warning

WARNING: 
~~~~~ getConfig for option "sourcefolder" must not be used from within readSource! Access will be disabled soon!

Reads in the Remind fuel costs the madrat-way.

See also: pik-piam/mrtransport#28

Checklist:

• I used ./test-standard-runs to compare and archive the changes introduced by this PR in /p/projects/edget/PRchangeLog/

Further information (optional):

• Test runs are here: /p/projects/edget/PRchangeLog/20241212_20241212_PR311_RemoveWarnings
• This should not change any data generated, as the PR just moves around function calls.
• I made sure that inputdata generation for REMIND (and EDGE-T SA) does not crash using this.

[ahagen-pik]

Hi Falk,
Thank you. I am not familiar with the warning, but have some questions regarding edgeT functionality.

Did you also check if edgeT iterative is still working properly between remind runs? The REMIND fuel costs are also needed in the iterative case, which does to my knowledge not call mrtransport. That's why the functions have been in the edgeTransport package rather than in mrtransport.

Why did you decide to leave the option for an explicitly given gdx path in toolLoadREMINDfuelCosts() although the gdx_path = NULL is hard coded in the function call? I think it would then be more useful to also allow for optionally defining a gdx_path at the very beginning, in the call calcEdgeTransportSA(), similar to how it has been, or get rid of the option altogether.

[ahagen-pik]

Sorry, misunderstanding on my side. Just the readSource for SA is moved to mrtransport and the iterative calculation is left unchanged.

The only thing is that this way we loose the possibility to use different gdx for standalone runs. That option would be quite helpful, for local runs or since we were for example planning to do a sensitivity test at some point. Would it be possible to retain this option without provoking the warning you fixed?

[fbenke-pik]

I brought back the option to pass a gdx via calcEdgeTransportSA. Please check again and let me know if this works for you.

[ahagen-pik]

Great. Thank you!