Document and add the ability to control `skip_artwork.txt`

[Edd Barrett]

I noticed that get_cover_art writes a skip_artwork.txt file which causes directories to be skipped on a rerun.

This file doesn't seem to be documented. I'd also like to ability to disable writing such a file.

Thanks!

[Rego Sen]

Good idea, I just added a --no_skip option that disables writing and using such a file. I also updated the documentation to better explain behavior around skip_artwork.txt

[Edd Barrett]

So to be clear, --no-skip will not cause covers already in the cache to be re-downloaded?

You are gonna kick yourself, but some of the args to get_cover_art are like --this_with_underscores and others are like --this-with-hyphens.

At first I tried --no-skip and got confused. It's --no_skip.

Probably too late to fix now.

[Rego Sen]

Ack, good catch. I'm switching them now to all be with hyphens (but still support underscore versions under the hood to be backwards-combatible)

--no-skip means it will ignore skip_artwork