#!/bin/sh
# Check repository for outdated packages
#
# Intended behavior.
# shellcheck disable=2106

[ "$1" ] || {
    printf 'usage: kiss outdated /path/to/repo\n' >&2
    exit 1
}

cd "$1" 2>/dev/null || {
    printf 'repository %s is inaccessible\n' "$1" >&2
    exit 1
}

printf 'Checking for outdated packages in %s\n' "$1" >&2

for pkg in *; do
    read -r ver _ < "$pkg/version" || {
        printf 'warning: %s/version not found' "$PWD/$pkg" >&2
        continue
    }

    [ "$ver" = git ] && {
        printf 'warning: skipping check for %s, version is git\n' "$pkg" >&2
        continue
    }

    pkg=${pkg%%-bin}
    pkg=${pkg%%-git}

    rep=$(curl -s "https://repology.org/badge/latest-versions/$pkg.svg") || {
        printf 'warning: failed to grab version for %s\n' "$pkg"
        continue
    }

    rep=${rep%</text>*}
    rep=${rep##*>}

    case $rep in
        *", $ver"* | *"$ver,"* | "$ver")
            # Found match, do nothing.
        ;;

        - | '' | ' ')
            printf 'warning: empty response from remote for %s\n' "$pkg"
        ;;

        *)
            printf '%s\n' "$pkg $ver -> $rep"
        ;;
    esac
done