latest-pkg.sh

#!/bin/sh -e
#
# Get latest version of a package.

[ "$1" ] || exit 1

curl -s "https://repology.org/badge/latest-versions/$1.svg" |
    while read -r line; do
        case $line in
            *"latest packaged version"*) v=$((v+=1)) ;;

            *)
                [ "$v" = 2 ] && {
                    line=${line#*>}
                    line=${line%<*}
                    printf '%s\n' "${line##*, }"
                    exit
                }
            ;;
        esac
    done