[Feature Request] Regenerate only changed files

[razetime]

As of now doclog seems to require a make clean to remove any output files before generating docs.

The generation process itself is quite slow. I think having it store timestamps and regenerate only changed documentation would be very helpful. Any other method that avoids unnecessarily regenerating files would also be nice.

[aarroyoc]

I think it's a worthy request. Probably a system that calculates the hashes of the source files and stores them in a meta-file in the output directory could be more robust.

If someone wants to implement it by themselves, please comment it here. Otherwise, I'll keep it in my backlog.