Focuses X application or runs it if not running (requires wmctrl utility installed)

focus-or-run.sh

#!/bin/sh

terminal_wm_class=$1
terminal_exec=$1

# no app started, so start one
if [ -z "`wmctrl -lx | grep $1`" ]; then
    $terminal_exec &
else
    # search for existing terminals on current desktop
    current_desk=`wmctrl -d | grep '*' | cut -d ' ' -f 1`
    term_on_this_desk=`wmctrl -lx | grep "$current_desk[ ]*$terminal_wm_class" | cut -d ' ' -f 1`
    if [ -n "$term_on_this_desk" ]; then
        wmctrl -i -a $term_on_this_desk
    else
        # no terminals on current desktop, so just open a new one
        wmctrl -x -R $terminal_wm_class
    fi;
fi;