postflight installer script to reload a LaunchAgent

gistfile1.sh

#!/bin/bash

# if someone is logged in
if who | grep -q console; then

  # get the logged in user's uid
  LOGGED_IN_UID=`ls -ln /dev/console | awk '{ print $3 }'`

  # use the uid and pgrep to find the Finder process id
  FINDER_PID=`pgrep -U ${LOGGED_IN_UID} Finder`

  # use launchctl bsexec to run applescript code in the same Mach bootstrap namespace hierachy as the Finder
  launchctl bsexec "${FINDER_PID}" osascript -e '
  tell app "Finder"
    do shell script "
      launchctl unload -S Aqua /Library/LaunchAgents/com.company.agent.plist
      launchctl load -S Aqua /Library/LaunchAgents/com.company.agent.plist
    "
  end tell
  '
fi