Hi,
I have written some syntax files (in /etc/vim/syntax/), and copied the
runtime filetype.vim in /etc/vim/ to tweak it.
I take the following example:
syntax file: /etc/vim/syntax/aptconf.vim
and, in filetype.vim:
========== BEGIN ==========
au BufNewFile,BufRead apt.conf setf aptconf
au BufNewFile,BufRead */apt.conf.d/* setf aptconf
=========== END ===========
But the apt.conf(5) manual page says that the file names must follow
some basic rules, such as:
- have either no or "conf" as filename extension
- only contain alphanumeric, hyphen (-), underscore (_) and period (.)
characters.
This means the filename must match the following BRE:
'^\([-_[:alnum:]]\+\|[-_.[:alnum:]]\+\.conf\)$'
So, I have written a function to check that and set the filetype:
========== BEGIN ==========
func! s:MatchNameSetf(ft,regexp)
if expand("<afile>:t") =~ a:regexp
exe 'setf ' . a:ft
endif
endfunc
=========== END ===========
And replaced the autocommand above by this one:
========== BEGIN ==========
au BufNewFile,BufRead */apt.conf.d/*
\ call
s:MatchNameSetf('aptconf','^\([-_[:alnum:]]\+\|[-_.[:alnum:]]\+\.conf\)$')
=========== END ===========
It works fine. But I'm curious, and tried that:
========== BEGIN ==========
au BufNewFile,BufRead */apt.conf.d/\([-_[:alnum:]]\+\|[-_.[:alnum:]]\+\.conf\)
setf aptconf
=========== END ===========
It works fine too... So now my question is: how filenames are they parsed in
the 'au'
command ? I thought regexp were not allowed, but only glob() wildcards and
braces
(as in the shell): see for cmusrc for example. And, from the two last
solutions, is there
someone to say me what is the best ?
Thanks
quidame
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