vim Ask to create non-existant directories upon saving a new file Prompt to create directories with :w, or sliently create them with :w!
Example
This code will prompt you to create the directory with :w, or just do it with :w!:
augroup vimrc-auto-mkdir
autocmd!
autocmd BufWritePre * call s:auto_mkdir(expand('<afile>:p:h'), v:cmdbang)
function! s:auto_mkdir(dir, force)
if !isdirectory(a:dir)
\ && (a:force
\ || input("'" . a:dir . "' does not exist. Create? [y/N]") =~? '^y\%[es]$')
call mkdir(iconv(a:dir, &encoding, &termencoding), 'p')
endif
endfunction
augroup END
