Bash script template to use several different Session IDs in parallel

run_session.sh

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

SESSION_PATH='~/Downloads/'
SESSION_APPIMAGE='session-desktop-linux-x86_64-1.10.8.AppImage'
IDENTITIES_PATH='~/Downloads/_Session_identities/'

IDENTITY='per'
LOCKFILE='/tmp/session_per'
SCREEN_NAME='session_per'


if $(lockfile-check ${LOCKFILE})
then
	# lockfile exists
	echo "${LOCKFILE} present. Already running."
else
	# lockfile does not exist
	echo "${LOCKFILE} not present. Starting."
	lockfile-create ${LOCKFILE}

	CMD="firejail --profile=session-desktop --private=${IDENTITIES_PATH}${IDENTITY} --appimage ${SESSION_PATH}${SESSION_APPIMAGE} ; lockfile-remove ${LOCKFILE}"

	GTK_USE_PORTAL=0 screen -dmS "${SCREEN_NAME}" bash -c "${CMD}"

	# 1. list screens matching ${SCREEN_NAME}, we assume only 1 match
	# 2. strip last and first line (unnecessary verbose output)
	# 3. split at "." ("        12345.screen_name"), select first field
	# 4. trim whitespace
	SCREEN_PID=$(screen -ls "${SCREEN_NAME}" | head -n 2 | tail -n 1 | cut -d '.' -f 1 | tr -d [:space:])

	# Search for window ID of parent process screen_pid
	W_ID=$(xdotool search --sync --onlyvisible --pid ${SCREEN_PID} --name ^Session$)

	xdotool windowminimize --sync "${W_ID}"

	# Exit to tray, uncomment for first use (and) when not having close to tray enabled
	sleep 5
	wmctrl -i -c "${W_ID}"
fi

Requires this firejail profile: https://github.com/oxen-io/session-desktop/issues/421#issuecomment-1241740484

Also requires sudo apt install firejail lockfile-progs screen wmctrl xdotool