This gist is responsible for upgrading a system service (systemd) and going into the folder by it's specified user and performing a git pull. After the pull occures bring the service back up.

upgradeServicefolderByGit.sh

#! /bin/sh

if [ $# -lt 3 ]; then 
  echo "No arguments supplied."
  echo " Example: upgradeFoldByBash: [Service name] [service account] [folder]"
  exit 1
fi

echo "Stopping the $1 Service"
systemctl stop $1

echo "Performing the update."
cd "$3"
sudo -u "$2" git pull  

echo "Restarting the $1 Service"
systemctl start $1