#! /bin/sh

paket_datei="$1"
done_datei="${paket_datei}.done"
err_datei="${paket_datei}.err"

if [ ! -e "$paket_datei" ]; then
        echo "Error! Package file doesn't exist."
        echo "Syntax: $0 FILE_WITH_PACKAGE_NAMES"
        exit 1
fi
[ ! -e "${done_datei}" ] && touch "${done_datei}"
[ ! -e "${err_datei}" ] && touch "${err_datei}"

grep '^\[ebuild' "$paket_datei" | cut -c 17- | while read pkg rest ; do
        grep -q "$pkg" "$done_datei" && continue
        echo "`date`: Building \"$pkg\"..."
        if emerge --oneshot --nodeps ="$pkg" ; then
                echo "`date`: Package \"$pkg\" build successfully." | tee -a "$done_datei"
        else
                code="$?"
                echo "`date`: Error while building package \"$pkg\". Code: \"$code\"" | tee -a "$err_datei"
                exit $code
        fi
done