tmux-continuum/scripts/resurrect_auto_restore.sh

#!/usr/bin/env bash

CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

source "$CURRENT_DIR/helpers.sh"
source "$CURRENT_DIR/variables.sh"

auto_restore_enabled() {
	local auto_restore_value="$(get_tmux_option "$auto_restore_option" "$auto_restore_default")"
	[ "$auto_restore_value" == "on" ] && [ ! -f "$auto_restore_halt_file" ]
}

current_tmux_server_pid() {
	echo "$TMUX" |
		cut -f2 -d","
}

all_tmux_processes() {
	ps -Ao "command pid" |
		\grep "^tmux"
}

tmux_processes_except_current_server() {
	all_tmux_processes |
		\grep -v " $(current_tmux_server_pid)$"
}

number_tmux_processes_except_current_server() {
	all_tmux_processes |
		\grep -v " $(current_tmux_server_pid)$" |
		wc -l |
		sed "s/ //g"
}

another_tmux_server_running() {
	# there are 2 tmux processes (current tmux server + 1) on tmux startup
	[ "$(number_tmux_processes_except_current_server)" -gt 1 ]
}

fetch_and_run_tmux_resurrect_restore_script() {
	# give tmux some time to start and source all the plugins
	sleep 1
	local resurrect_restore_script_path="$(get_tmux_option "$resurrect_restore_path_option" "")"
	if [ -n "$resurrect_restore_script_path" ]; then
		"$resurrect_restore_script_path"
	fi
}

main() {
	if auto_restore_enabled && ! another_tmux_server_running; then
		fetch_and_run_tmux_resurrect_restore_script
	fi
}
main