Vim: Saving on FocusLost and executing auto command

Question

I've setup my vim editor (I use MacVim) to save files automatically when the focus is lost:

autocmd FocusLost * silent! wall

I also automatically strip trailing whitespace from python files using this auto command:

autocmd BufWritePre *.py :%s/\s\+$//e

This auto command works perfectly when I save the file manually (either by typing :w or by pressing ⌘s) but it is not executed (i.e. the whitespace is not stripped) when I switch to another application and the buffer is automatically written.

How can I modify these auto commands to make them work together?

Answer 1

You need to change your FocusLost autocommand to:

autocmd FocusLost * nested silent! wall

See :h autocmd-nested for details.

Answer 2

I can't test this in a graphic Vim, but you can try some options:

• Join some events in the same autocommand autocmd BufWritePre,FocusLost *.py ...
• Execute an autocommand from an event, something like:
  autocmd BufWritePre *.py :execute "%s/\s\+$//e" | doautocmd FocusLost %