Update Zoom, Rocket.Chat and Mattermost deb

z_r_m_updatedeb.sh

#!/bin/sh

if [ $(id -u) -ne 0 ] ; then echo "Please run as root" ; exit 1 ; fi

f_update() {
  current=$(dpkg -l | grep $1 | awk '{ print $3 }' | cut -d'-' -f1)

  if [ "$1" = "zoom" ];
  then
    url="https://zoom.us/client/latest/zoom_amd64.deb"
    dest="/tmp/zoom_amd64.deb"
    latest=$(curl 2>&1 -I ${url} | grep location | grep -oP '(?<=prod\/).*(?=\/zoom_amd64.deb)')
  elif [ "$1" = "rocket" ];
  then
    latest=$(curl 2>&1 https://github.com/RocketChat/Rocket.Chat.Electron/releases/latest | grep -oP '(?<=\/tag\/).*(?=\">redirected)')
    url="https://github.com/RocketChat/Rocket.Chat.Electron/releases/download/${latest}/rocketchat_${latest}_amd64.deb"
    dest="/tmp/rocket_amd64.deb"
  elif [ "$1" = "mattermost" ];
  then
    latest=$(curl 2>&1  -I https://github.com/mattermost/desktop/releases/latest | grep -oP '(?<=\/tag\/v).....')
    url="https://github.com/mattermost/desktop/releases/download/v${latest}/mattermost-desktop_${latest}-1_amd64.deb"
    dest="/tmp/mattermost_amd64.deb"
  else
    exit 1
  fi

  if [ "${current}" = "${latest}" ];
  then
    echo "$1 is already up to date."
  else
    wget -q --show-progress ${url} -O ${dest}
    pkill $1
    dpkg -i ${dest}
    if [ "$1" = "rocket"]; then
      chown -R $SUDO_USER: /opt/Rocket.Chat
    fi
    if [ "$1" = "mattermost" ]; then
      chown -R $SUDO_USER: /opt/Mattermost
    fi

    rm -f ${dest}
  fi
}

main() {
  f_update zoom
  f_update rocket
  f_update mattermost
}

main "$@"