Esta é uma seção do meu .vimrc
:
" enable filetype detection:
filetype on
filetype plugin on
filetype indent on " file type based indentation
" recognize anything in my .Postponed directory as a news article, and anything
" at all with a .txt extension as being human-language text [this clobbers the
" 'help' filetype, but that doesn't seem to prevent help from working
" properly]:
augroup filetype
autocmd BufNewFile,BufRead */.Postponed/* set filetype=mail
autocmd BufNewFile,BufRead *.txt set filetype=human
augroup END
autocmd FileType mail set formatoptions+=t textwidth=72 " enable wrapping in mail
autocmd FileType human set formatoptions-=t textwidth=0 " disable wrapping in txt
" for C-like programming where comments have explicit end
" characters, if starting a new line in the middle of a comment automatically
" insert the comment leader characters:
autocmd FileType c,cpp,java set formatoptions+=ro
autocmd FileType c set omnifunc=ccomplete#Complete
" fixed indentation should be OK for XML and CSS. People have fast internet
" anyway. Indentation set to 2.
autocmd FileType html,xhtml,css,xml,xslt set shiftwidth=2 softtabstop=2
" two space indentation for some files
autocmd FileType vim,lua,nginx set shiftwidth=2 softtabstop=2
" for CSS, also have things in braces indented:
autocmd FileType css set omnifunc=csscomplete#CompleteCSS
" add completion for xHTML
autocmd FileType xhtml,html set omnifunc=htmlcomplete#CompleteTags
" add completion for XML
autocmd FileType xml set omnifunc=xmlcomplete#CompleteTags
" in makefiles, don't expand tabs to spaces, since actual tab characters are
" needed, and have indentation at 8 chars to be sure that all indents are tabs
" (despite the mappings later):
autocmd FileType make set noexpandtab shiftwidth=8 softtabstop=0
" ensure normal tabs in assembly files
" and set to NASM syntax highlighting
autocmd FileType asm set noexpandtab shiftwidth=8 softtabstop=0 syntax=nasm
A seção deve ser autoexplicativa, mas sugiro que você leia a ajuda do vim em filetype
e autocmd
.
A linha mais relevante para você é provavelmente esta:
autocmd FileType make set noexpandtab shiftwidth=8 softtabstop=0
certifique-se de que a detecção do tipo de arquivo está ativada.