The rpmbuild-order tool sorts source RPM packages by build dependencies, so
that they can be built in a correct order. It does this by reading RPM package
spec files and then topologically sorts them according to their build
dependencies. The code evolved from cabal-sort by Henning Thielemann.
It can also order the dependencies or reverse depends of one or more packages
among the packages checked out in neighboring directories (which can be useful
to see what packages are affected when a low-level package changes, or which
packages are dependents of one of more packages). It also has support for
setting RPM options for bcond etc, which can affect dependencies. It can also
output dependency graphs. Since version 0.4, a library API is provided.
