update_deb_from_github.sh

update_deb_from_github() {
	repo=$1  # will use github.com/repos/${repo}/releases, so set to e.g. BoostIO/boostnote
	pkg=$2  # name of the Deiban package e.g. apt can use, so e.g. boostnote
	deb_type=$3  # a substring of the deb file on github releases which uniquely tells the requested deb from other deb files on the latest releases page
  
	version_installed=$(LANG=C aptitude show boostnote | grep Version | grep -o '[0-9]\{1,2\}\.[0-9]\{1,2\}\.[0-9]\{1,2\}')
	download_link=$(curl -s https://api.github.com/repos/${repo}/releases/latest | jq -r ".assets[] | .browser_download_url" | grep "${deb_type}.*\.deb")
	version_upstream=$(echo ${download_link} | grep -o '[0-9]\{1,2\}\.[0-9]\{1,2\}\.[0-9]\{1,2\}' | head -n1)
	if [[ "${version_installed}" != "${version_upstream}" ]]; then 
		wget -O "/tmp/${pkg}.deb" "${download_link}"
		sudo dpkg -i "/tmp/${pkg}.deb"
	else
		echo "${pkg} version ${version_installed} is up to date"
	fi
}

Automatically update a debian package that is only released on github releases page.