Vim file indent type autodetection

vimrc

@@ -454,3 +454,12 @@ function! ShowModeInStatusLine()
     endif
     return g:showMode
 endfunction
+"[Autodetect indent style of a file]"
+function AutoDetectTabs()
+    if len(filter(getbufline(winbufnr(0), 1, "$"), 'v:val =~ "^\\t"')) > len(filter(getbufline(winbufnr(0), 1, "$"), 'v:val =~ "^ "'))
+        set noet ts=4 sw=4
+    endif
+endfunction
+if has("autocmd")
+    autocmd BufReadPost * call AutoDetectTabs()
+endif