Question

I know adding the following to ~/.vimrc will autosave a session file in the current directory with the name ‘Session.vim’.

autocmd BufWritePre :mksession!

However, these files would litter up directories. I would rather save the session file to /tmp/[some filename which specifies the directory].

Is there any way to do this?

Answer 1

You can use this expression to generate the file name:

"/tmp/vimSessions/".substitute(expand("%:p:h"),"/","_","g")

Ofcourse, you can change the first string to contain whatever directory you want.

UPDATE:

Add this to your vimrc file:

function GetSessionName(useFileName)
    if a:useFileName
        let l:dir=expand("%:p:h")
    else
        let l:dir=getcwd()
    endif
    return fnameescape("/tmp/vimSessions/".substitute(l:dir,"/","_","g"))
endfunction
if !isdirectory("/tmp/vimSessions")
    call mkdir("/tmp/vimSessions")
endif
autocmd VimEnter * if filereadable(GetSessionName(0))|exe "source ".GetSessionName(0)|endif
autocmd BufWritePost * exe "mksession! ".GetSessionName(1)