vim session 自动保存

vimrc

"auto sv and ld session
let g:AutoSessionFile=".project.vim"
let g:OrigPWD=getcwd()
if filereadable(g:AutoSessionFile)
    if argc() == 0
        au VimEnter * call EnterHandler()
        au VimLeave * call LeaveHandler()
    endif
endif
function! LeaveHandler()
    exec " ".g:OrigPWD."/".g:AutoSessionFile
    endfunction
    function! EnterHandler()
    exe "source