kiss/contrib/kiss-outdated

#!/bin/sh
# Check installed packages for updates

old_IFS=$IFS

kiss s "${@:-*}" | (while read -r pkg_loc _; do {
    read -r ver _ < "$pkg_loc/version"

    pkg=${pkg_loc##*/}

    # Fix some package names.
    case $pkg in
        *-bin)   fix=${pkg%%-bin} ;;
        *[0-9]r) fix=${pkg%%r} ;;
    esac
    
    # Ignore duplicates.
    # shellcheck disable=2106
    case $seen in
        *" ${fix:-$pkg} "*) continue ;;
        *) seen=" $seen ${fix:-$pkg} " ;;
    esac

    # Grab the repology version from the SVG file.
    rep=$(curl -s "https://repology.org/badge/latest-versions/${fix:-$pkg}.svg")
    rep=${rep%</text>*}
    rep=${rep##*>}

    # Skip these.
    # shellcheck disable=2106
    {
        [ "${rep:--}" = - ] && continue
        [ "$ver" = git ]    && continue
    }

    # Split the comma separated list.
    # shellcheck disable=2086
    {
        IFS=', ' 
        set -f
        set +f -- $rep
        IFS=$old_IFS
    }

    # Parse comma separated version lists.
    {
        for v; do case $v in "$ver") match=1; esac; done

        [ "$match" ] || printf '%s\n' "$pkg $ver -> $rep"
    }
} & done; wait)