How can I tell emacs not to pop up the *Shell Command Output* buffer when calling a shell command like this?
(shell-command MY_COMMAND)
Currently emacs splits the current window into two, showing the (mostly irrelevant) output buffer. To me it would be completely sufficient if I could look it up later if I feel like it.
In my experience, if the shell command itself produces no output, then the emacs *Shell Command Output* buffer won't pop open.
Therefore, to avoid the output buffer, silence the output of the command.
One easy way is:
" > /dev/null 2>&1" to the end of any shell command. (Caveat: I'm unsure if /dev/null exists on 100% of platforms where one can run emacs, but on every Linux distro it should be fine.)
If the call to elisp function shell-command is in an elisp script, then you could change this:
(shell-command cmd)
to this:
(shell-command (concat cmd " > /dev/null 2>&1"))
If you occasionally do want to monitor the output, then you could create one wrapper function that suppresses the output via /dev/null, and one wrapper function with no suppression, and toggle between them as you wish.
The above advice was tested on: GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9) of 2017-09-20 on lcy01-07, modified by Debian
What's even better, is to use
(shell-command (concat cmd " 1>&2") t t)
This way, the output is saved in the error buffer, should you want to look at it. But it does not pop up automatically.