extend_skip option to skip files *in addition to* files skipped in skip

[Jackenmen]

This option would behave like skip, but it would add the files specified in extend_skip on top of the ones skipped by skip. I'm guessing that this would most commonly be useful to not have to include the defaults in skip option in isort configuration file when you just want to skip some path in addition to the (imo) useful defaults.
In some environments, it could probably also be useful to pass --extend-skip cli flag to add onto skip that's already included in the isort configuration file. I guess that one would be a bit limited considering that one would probably often already use extend_skip in the configuration and the cli flag would override that, but I'm guessing that at least some would probably be able to work with that anyway.

Here are some tools that already allow this in case that helps :)
flake8
black

[Jackenmen]

Update: I guess the existing skip_glob might already be enough for this considering it already extends skip. I don't think I'm gonna need this in such case then and I leave it up to you whether this should be closed or not.

[timothycrosley]

Hi @jack1142,

Thanks for bringing this up! I think it makes sense for isort to have an extend skip to stay as CLI compatible with other tools as possible. I've added both an extend skip and extend skip glob flag to address this.

Thanks!

~Timothy

[govindrai]

Could you guys explain extend_skip? Even after reading the docs I don't understand what it's purpose is

[m000]

Could you guys explain extend_skip? Even after reading the docs I don't understand what it's purpose is

What's so mysterious about it?

This option would behave like skip, but it would add the files specified in extend_skip on top of the ones skipped by skip.