Set path to location of tags file

Question

I think this is not quite a duplicate, although it's close.

I often work with multiple, slightly different, checkouts of the same multi-directory project. I'd like to be able to jump around using tags and gf, always staying within the current checkout, without having to type anything at startup.

There is a different tags file at the top-level directory of each checkout. The checkouts are numerous and their locations far from static, so hard-coding in paths is not an acceptable solution.

A simple

set tags=tags;/

seems to work acceptably for the tags part. But to get gf to work I need to append the location of the tags files thus found (notably including the top-level directory) to the path somehow. Any ideas on how to do this?

Answer 1

let &path += fnamemodify(tagfiles()[0], ':p:h')

should add the path of your tags file's parent directory to the path option.

Updating path each time you enter a buffer is probably a good idea:

augroup UpdatePath
    autocmd!
    autocmd BufNewFile,BufRead,BufEnter * set path&vim | let &path += fnamemodify(tagfiles()[0], ':p:h')
augroup END