" " auto_undodir.vim: Configure 'undodir' automatically, including trying hard " to create it. " " Author: Tom Ryder " License: Same as Vim itself " if exists('g:loaded_auto_undodir') || &compatible || !has('persistent_undo') finish endif let g:loaded_auto_undodir = 1 " Define the undo path we want if exists('$VIM_UNDODIR') let s:undodir = $VIM_UNDODIR else " This is imperfect in that it will break if you have a backslashed comma in " the first component of your &runtimepath, but if you're doing that, you " probably already have way bigger problems let s:undodir \ = strpart(&runtimepath, 0, stridx(&runtimepath, ',')) \ . '/undo' endif " If the prospective undo directory does not exist, try hard to create it if !isdirectory(expand(s:undodir)) " Try Vim's native mkdir() first if exists('*mkdir') silent! call mkdir(expand(s:undodir), 'p', 0700) " Failing that, use an OS-dependent command " (Fortunately, Unix and Windows are the only OS types in the world) elseif has('unix') silent! execute '!mkdir -m 0700 -p ' \ . shellescape(expand(s:undodir)) elseif has('win32') || has('win64') silent! execute '!mkdir ' \ . shellescape(expand(s:undodir)) endif endif " If the directory exists after that... if isdirectory(expand(s:undodir)) " Set the undo directory and turn persistent undo files on execute 'set undodir^=' . s:undodir . '//' set undofile " If not, give up and raise an error else echoerr 'Could not create undodir ' . s:undodir endif