document/set up support tooling for editor integrations

[RonnyPfannschmidt]

follow-up to jgirardet/sublack#31

as i conversed with sublack author, it became apparent that its pretty hard/tricky to integrate pre-commit/black for example with editor integrations (in order to fix exact project set-ups)

i wonder if the issue can be elevated/helped in some way

[asottile]

I've used pre-commit run --files $filename myself w/ editors which works pretty well. This does require that the file is written out beforehand 🤷‍♂️

[asottile]

@RonnyPfannschmidt can you reopen this on the docs repo? https://github.com/pre-commit/pre-commit.github.io

[RonnyPfannschmidt]

@asottile i suppose supporting input from streams is not directly sensible=?

[asottile]

pre-commit works entirely on filenames today -- it could probably be made to support /dev/stdin / - (and skip filtering it against the checked in files)? I'd have to see a pretty good reason for it though :) (and I'm not sure avoiding a disk flush is really going to save that much time)

[RonnyPfannschmidt]

@asottile true in case of doubt tmpfs ftw