Request: flag(s) to take input from stdin and send output to stdout, rather than in-place editing

[AndydeCleyre]

This came up for me specifically trying to integrate ssort into the Zed editor, which expects any provided external formatter to output the new content to stdout, and take input from stdin.

[bwhmather]

That sounds very reasonable. If you're up for writing a PR then I would be enthusiastic to help get it merged and released. I think it should just be a matter of a few small tweaks to _main.py.

[AndydeCleyre]

Thanks, I'll submit something!

I think it'll be sufficient to have a mode that reads stdin, and in that case writes stdout (no need for a separate stdout option).

Which would you prefer of

1. --stdin
2. A single dash - where the file args usually go
3. Detect when content is being piped
4. Something else

?

[bwhmather]

I had assumed --stdout but I think you are right that there's no need. Looks like isort and black both go with option 2 so might as well be consistent with that.

[AndydeCleyre]

Completed in 0.14.0 with #119 !

For anyone finding this, passing - as a file arg now means read stdin and send formatted result to stdout.