gistfile1.vim

function! MakeSession()
    let b:sessiondir = $HOME . "/.vim/sessions" . getcwd()
    if (filewritable(b:sessiondir) != 2)
        exe 'silent !mkdir -p ' b:sessiondir
        redraw!
    endif
    let b:filename = b:sessiondir . '/session.vim'
    exe "mksession! " . b:filename
endfunction
function! LoadSession()
    let b:sessiondir = $HOME . "/.vim/sessions" . getcwd()
    let b:sessionfile = b:sessiondir . "/session.vim"
    if (filereadable(b:sessionfile))
        exe 'source ' b:sessionfile
    else
        echo "No session found."
    endif
endfunction
map <silent> <Leader>l :call LoadSession()<CR>
au VimLeave * :call MakeSession()