Add customise filetype setting file do.vim inside ftdetect folder.
Edit gvim/8.2/share/vim/vim82/filetype.vim:
runtime! $HOME/.vim/ftdetect/*.vim
Open file, run verbose set ft?. From print, filetype is still default conf.
Last set from ~/TOOLS/gvim/8.2/share/vim/vim82/filetype.vim line 2193

If comment out runtime! and add so $HOME/.vim/ftdetect/do.vim.
Open file, run verbose set ft?, it shows correct filetype setting.
Last set from ~/bin/vim/env/vim/ftdetect/do.vim line 6
Note: $HOME/.vim is soft link to ~/bin/vim/env/vim.

Not sure why runtime! is not working. enter image description here

  • Is the screenshot taken from $VIMRUNTIME/filetype.vim? Did you modify line 2182? It should read runtime! ftdetect/*.vim. The runtime-command already takes care of searching your local .vim directory (and all the other paths in 'runtimepath'). Oct 20, 2021 at 9:00
  • Yes, you are right. If I revert the change and use default runtime! command, it's working. So problem is the path.
    – Fisher
    Oct 20, 2021 at 9:09

1 Answer 1


Edit gvim/8.2/share/vim/vim82/filetype.vim

Messing with standard config files is discouraged unless one clearly understands what's he doing. (And even then the chances are one shouldn't do this, never ever).

runtime! $HOME/.vim/ftdetect/*.vim

This is wrong for a pretty simple reason: basically what :runtime! does, it iterates through all paths in :h 'runtimepath', prepends each one as a prefix to your path and then tries to :source the resulting file name/wildcard. Hence the right syntax is runtime! ftdetect/*.vim.

However, it's already in $VIMRUNTIME/filetype.vim which will be sourced upon :filetype on and so it needs not be touched AT ALL.

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