I have the following in my .vimrc:

:set colorcolumn=81

This sets the background color of every window's 81st column to red. I would like to disable this for "pop-up" windows like syntastic's error display window or jedi's docstring window. Since buffers similar to these are usually non-modifiable I thought I might be able to only active colorcolumn for modifiable buffers but I can not figure out how.

  • Should be no problem with an autocommand with event, oh, BufReadPost probably. Have it check the newly opened buffer and set colorcolumn only when desired conditions exist. – B Layer Aug 10 '18 at 20:39
  • See my edit, I get what you mean but I'm not sure on the details. – Peter Aug 10 '18 at 20:48
  • All right. Good job. Add it as an answer. – B Layer Aug 10 '18 at 21:05

I'm adding my solution as an answer, the following snippet solves my problem:

autocmd BufWinEnter * call SetColorColumn()

function! SetColorColumn()
    if &modifiable
        set colorcolumn=81
        set colorcolumn&

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