A bash script to kill/restart xbar, in response to xbar issue #714

restart_xbar.sh

#!/usr/bin/env bash

# See https://github.com/matryer/xbar/issues/714

getxbarpid () {
    ps -Ac -o pid=,comm= | grep xbar | column -t | cut -d ' ' -f 1
}

xbarpid="$(getxbarpid)"
if [ -z "$xbarpid" ] ; then
    echo -n "xbar not running? Will try to start it... "
else
    echo -n "killing xbar pid $xbarpid... "
    kill $xbarpid
    if [ $? -ne 0 ]; then
        echo "kill failed? Return code: $?"
        exit 1
    fi
    sleep 2
    # Check it's really gone.
    xbarpid2="$(getxbarpid)"
    if [ -z "$xbarpid2" ] ; then
        echo -n "gone; restarting... "
    else
        if [ $xbarpid -eq $xbarpid2 ] ; then
            # Sometimes we need to bring out the big guns
            echo -n "kill it with fire... "
            # I use HUP here; seems to work; could be KILL otherwise?
            kill -HUP $xbarpid
            sleep 5
        else
            # Restarted by something else? Leave it.
            echo "new pid $xbarpid — abort!"
            exit 1
        fi
    fi
fi
open -ja /Applications/xbar.app
echo "done"