Q:

Suppress output from a vim autocmd?

I have a simple BufWritePost autocmd to automatically generate HTML from my vimwiki pages.
autocmd BufWritePost *.wiki VimwikiAll2HTML

But it spits out a lot of progress output, and a prompt at the end:
Press ENTER or type command to continue

Is there a way to suppress the output and prompt from a vim autocmd, to make it completely transparent?

A:

Try to add silent after the pattern.
autocmd BufWritePost *.wiki silent VimwikiAll2HTML

And add your autocmd that works well to your question, it will greatly help.

