The rpmbuild-order tool orders RPM packages by dependencies, so that they can
be built in the correct order. It does this by reading RPM package spec files
and then topologically sorts them according to their dependencies. The code
originates from cabal-sort by Henning Thielemann. It can also output the
ordered dependencies or reverse depends for one or more packages, provided all
the packages are checked out in neighboring directories. This is also useful
to see what packages are affected when a low-level package changes.
