How can I stop vim from loading a syntax file automatically for certain file types?

Question

I am working on a project writing a GLSL fragment shader, and it just so happens it has the file extension .fs, thus vim automatically loads the forth syntax upon opening the file.

This normally would be no problem, I could just change the syntax using au BufRead but for some reason the forth syntax is loaded first, which completely messes things up. It adds more characters to a "word" which causes syntax highlighting and motions to not work as expected.

Is there a way to stop the forth syntax from loading, and only load my specified syntax?

If you manually do :set syn=glsl, does that work as desired? — earl
– earl, Commented Jul 20, 2010 at 4:06
nope, the damage has already been done after the file has loaded. I found the line that makes the change, I could just undo it but I would like to find a cleaner solution. It is set iskeyword if you are interested. — leafo
– leafo, Commented Jul 20, 2010 at 4:22

Bill Odom · Accepted Answer · 2010-07-20 05:28:22Z

Create a file in your .vim directory (or vimfiles directory on Windows) called filetype.vim and put this code in it:

if exists("did_load_filetypes")
    finish
endif

augroup filetypedetect

    " Ignore filetypes for *.fs files
    autocmd! BufNewFile,BufRead *.fs  setfiletype ignored

augroup END

This places a custom filetype-detection script ahead of Vim's default filetype autocommands, so your detection autocommands get a chance to determine the filetype before the usual Vim scripts.

Once you restart Vim and attempt to load a .fs file, it should no longer use Forth syntax highlighting, and iskeyword should still be set to the default value. (If you've installed a syntax file for the GLSL fragment files, you can replace the ignored with the appropriate filetype name.)

See these topics for more info:

:help remove-filetype
:help new-filetype
:help :setfiletype

too much php · Accepted Answer · 2010-07-20 06:22:28Z

0

Add the following line to the end of your syntax file:

let b:current_syntax = "<filetype>"

answered Jul 20, 2010 at 6:22

too much php

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