update-shiny-server on ubuntu

update-shiny-server.sh

#!/bin/bash

DISTRO="ubuntu"
DISTROCODE="14.04"
ARCH="x86_64"
HOST="https://download3.rstudio.org"

ShinyV=$(curl -s https://www.rstudio.com/products/shiny/download-server/ |\
  grep 'Download RStudio Shiny Server' |\
  sed 's/<[^>]*>//g' |\
  sed 's/Download RStudio Shiny Server v//' |\
  sed 's/ //g' |\
  tr -d '[:space:]')

ShinyU="${HOST}/${DISTRO}-${DISTROCODE}/${ARCH}/shiny-server-${ShinyV}-amd64.deb"

InstallV=$(apt-cache policy shiny-server |\
  grep Installed |\
  sed 's/Installed: //g' |\
  sed 's/ //g' |\
  tr -d '[:space:]')

if [ "${ShinyV}" != "${InstallV}" ]; then

  wget $ShinyU
  sudo gdebi "shiny-server-${ShinyV}-amd64.deb"
  rm "shiny-server-${ShinyV}-amd64.deb"

fi