vimrc: add automkdir func

.vim/vimrc

@@ -935,6 +935,30 @@ hi CursorLineNR cterm=bold
 syntax sync minlines=256
 
 
+function! AskQuit (msg, proposed_action)
+    if confirm(a:msg, "&Quit?\n" . a:proposed_action) == 1
+        exit
+    endif
+endfunction
+
+function! EnsureDirExists ()
+    let required_dir = expand('%:h')
+    if !isdirectory(required_dir)
+        call AskQuit('Directory "' . required_dir . '" doesn''t exist.', '&Create it?')
+
+        try
+            call mkdir( required_dir, 'p' )
+        catch
+            call AskQuit('Can''t create "' . required_dir . '"', '&Continue anyway?')
+        endtry
+    endif
+endfunction
+
+augroup AutoMkdir
+    autocmd!
+    autocmd BufNewFile * :call EnsureDirExists()
+augroup END
+
 
 nnoremap <Leader>ve :e $MYVIMRC<CR>
 nnoremap <Leader>vr :source $MYVIMRC<CR>