#! /usr/bin/sh

WATCHLIST=~/.local/share/package-alert/watchlist

agg_results=""

if [ -f "${WATCHLIST}" ]; then
    for pattern in $(cat "${WATCHLIST}"); do
        pat_results=$(apt-cache search --names-only "${pattern}")
        if [ ! -z "${pat_results}" ]; then
            agg_results="${agg_results:+${agg_results}
}Packages matching \"${pattern}\":
${pat_results}
"
        fi
    done
fi

if [ ! -z "${agg_results}" ]; then
    printf '%s' "${agg_results}" | /usr/sbin/sendmail "${USER}"
fi