How can I override ~/.vim and ~/.vimrc paths (but no others) in vim?

Question

Let\'s say I have a tarball of all my vim config - everything normally inside ~/.vim (plugins, autoload, colours, all that stuff), and a vimrc file. I extract this to a director

Answer 1

I have a portable .vim folder exactly as you described, this is how I have set it up:

• Put your portable .vimrc file inside your .vim folder.

• Add the following lines to the start of your portable .vim/.vimrc:

" set default 'runtimepath' (without ~/.vim folders)
let &runtimepath = printf('%s/vimfiles,%s,%s/vimfiles/after', $VIM, $VIMRUNTIME, $VIM)

" what is the name of the directory containing this file?
let s:portable = expand(':p:h')

" add the directory to 'runtimepath'
let &runtimepath = printf('%s,%s,%s/after', s:portable, &runtimepath, s:portable)

• Start vim by using: vim -u /path/to/portable/vim/.vimrc.