updates. It doesn't store state yet, so it starts from top on every run.
Example usage:
toru -u $ABSROOT/core
To build *all* updates:
sudo pacman -Sy
pushd $ABSROOT/core >/dev/null
for pkg in $(toru -uq $PWD); do
pushd $pkg >/dev/null
fullpkg
popd >/dev/null
done