deprecate -m ending for clustering?

[martacki]

Describe the feature you'd like to see

With PR #415, the current ending -m in the clustering (e.g. elec_s_45m.nc) seems odd. I'd suggest to remove this option, and either substitute this with the possibility to write renewables into exclude_carriers in the config, or simply remove it without substitution. In the latter, users have to manually input which carriers shouldn't be clustered without the default suggestion of the -m ending. I have the feeling that maintaining this -m option is cumbersome even for developers, and I don't have the impression that it is being used.

What do others think?

[fneum]

Tentatively agree. One disadvantage would be that you cannot easily sweep the different settings by encoding them in a wildcard, e.g.

elec_s_45
elec_s_45m
elec_s_181
elec_s_181m

in one snakemake call.

[fneum]

I just looked into this again. I don't think there is a benefit to remove it (it's just 3 lines of code), whereas we loose some functionality as mentioned above.

However, I have made a small adjustment in #479 that aligns it to the exclude_carrier functionality.