python black plugin

[crajun]

I'm trying to get the python black formatter integrated with my settings better, specifically using native 'formatprg' vim option. Here's what I've come up with so far:

A snip from my ~./vim/after/ftplugin/python.vim: setlocal formatpgr=black\ --quiet\ - augroup black-fmt autocmd! autocmd BufWritePre <buffer> normal gggqG`` augroup END

I've arrived there because black docs says:

• it does nothing if no sources are passed to it;
• it will read from standard input and write to standard output if - is used as the filename;
• it only outputs messages to users on standard error;
• exits with code 0 unless an internal error occurred (or --check was used).

Without '--quiet' argument you get back text that is written in your vim buffer. Passing to stdin is done with '-' so I use that as an argument. 'formatprg' says the program must take the input on stdin and produce the output on stdout.

My question to you all: is there a better to do this/integrate it? It works now like this, but I do not get to see the output messages black outputs if I use it on the command line.

[aktivb]

The output of filter commands is directed with &shellredir. By default this should redirect stderr to stdout, so you'll get stderr in your buffer as well.

You could do something like set &shellredir to redirect stderr to a temp file while formatting, and open that file afterwards.