exec >&2
dir=${1%/*}
pkg=${1##*/}
pkg=${pkg%.rpm}
redo-ifchange "$S/oss/version/short.txt" "$dir/$pkg.tar.gz" "$dir/$pkg.spec"
read -r pkgver junk <"$S/oss/version/short.txt"

machine=$(uname -m)
rpmbase=$HOME/rpmbuild

mkdir -p "$rpmbase/SOURCES/"
cp "$dir/$pkg.tar.gz" "$rpmbase/SOURCES/"
rm -f "$rpmbase/RPMS/$machine/$pkg-$pkgver.$machine.rpm"
rpmbuild -bb "$dir/$pkg.spec"
mv "$rpmbase/RPMS/$machine/$pkg-$pkgver.$machine.rpm" $3