" Use backup features if on a UNIX-like system and not using sudo(8) if !strlen($SUDO_USER) && has('unix') " Keep backups with a .bak extension in ~/.vim/backup; the double-slash at " the end of the directory is supposed to prod Vim into keeping the full " path to the file in its backup filename to avoid collisions, but I don't " think it actually works for backups, just undo and swap files set backup set backupext=.bak set backupdir^=~/.vim/backup// " This option already includes various temporary directories, but we " append to it so that we don't back up anything in a shared memory " filesystem either set backupskip+=*/shm/* " Create the backup directory if necessary and possible if !isdirectory($HOME . '/.vim/backup') && exists('*mkdir') call mkdir($HOME . '/.vim/backup', 'p', 0700) endif " Don't use backups at all otherwise else set nobackup set nowritebackup endif