Why vundle requires filetype off

问题

On vundle's homepage, it documented that it requires filetype to be off in .vimrc:

 filetype off                   " required!
 set rtp+=~/.vim/bundle/vundle/
 call vundle#rc()

I don't understand why. Since I am encountering problems with editing .coffee and .less files recently after separately-installed related plugins for them (vim-coffee-script and vim-less). My issue on vim-coffee-script

回答1:

You can set filetype on after the last Vundle command:

 filetype off                   " required!
 set rtp+=~/.vim/bundle/vundle/
 call vundle#rc()
 ...
 Vundle 'blabla'
 Vundle 'blabla2'

 filetype plugin indent on   " re-enable filetype

回答2:

I wanted to address the why part of this problem.

Most of this answer is from the following github thread

https://github.com/VundleVim/Vundle.vim/issues/176

It is Vim's feature.
Vim makes cache for filetype plugins from runtimepath. So if vundle changes runtimepath, it must reset before calling.

It's also said there that this problem was only there before 7.3.430.

As @Maxim Kim has answered, its better to turn it on after everything related to Vundle

set nocompatible
filetype off
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()

" Let vundle manage itself:
Plugin 'VundleVim/Vundle.vim'
" Syntax checking plugin
Plugin 'scrooloose/syntastic'

call vundle#end() 

filetype plugin indent on " Filetype auto-detection
syntax on " Syntax highlighting

来源：https://stackoverflow.com/questions/14642956/why-vundle-requires-filetype-off