Multi-monitor setup depending on location. The location is determined by the ESSID.

multimon.sh

#!/bin/bash -e

monsetup="$(xrandr)"
int_mon="$(grep -Eo 'LVDS[[:digit:]]' <<< "${monsetup}")"
ext_mon="$(grep -Eo 'VGA[[:digit:]]' <<< "${monsetup}")"

if grep -Eq 'VGA[[:digit:]] connected' <<< "${monsetup}"; then
	# where am I?
	at_work=0
	for conn in $(sudo netcfg current); do
		if [[ "${conn}" == stampay* ]]; then
			at_work=1
			break
		fi
	done
	# place monitors correctly and make LVDS primary
	if [[ "${at_work}" -eq 0 ]]; then
		left_mon="${int_mon} --primary"
		right_mon="${ext_mon}"
	else
		left_mon="${ext_mon}"
		right_mon="${int_mon} --primary"
	fi
	xrandr \
		--output ${right_mon} --mode 1920x1080 --pos 1920x0 --rotate normal \
		--output ${left_mon} --mode 1920x1080 --pos 0x0 --rotate normal
	sed -ri \
		-e "/^# BEGIN LAYOUT/,/^# END LAYOUT/ s/(workspace) ([1-5]) (output) .*/\1 \2 \3 ${left_mon%% *}/" \
		-e "/^# BEGIN LAYOUT/,/^# END LAYOUT/ s/(workspace) ([6-9]|10) (output) .*/\1 \2 \3 ${right_mon%% *}/" \
		~/.i3/config
	i3-msg reload
	i3-msg 'rename workspace 6 to "6: www"'
	i3-msg 'rename workspace 9 to "9: Spotify"'
	i3-msg 'rename workspace 10 to "10: Jabber"'
else
	xrandr \
		--output "${int_mon}" --primary --mode 1920x1080 --pos 0x0 --rotate normal \
		--output "${ext_mon}" --off
	sed -ri "/^# BEGIN LAYOUT/,/^# END LAYOUT/ s/VGA[[:digit:]]{1,2}/${int_mon}/" ~/.i3/config
	i3-msg reload
fi

nitrogen --restore