Why do those policies make it there in the first place? Could you share some scenarios? I'd love to improve the managibility of policies :)
The hydra ( http://github.com/ory/hydra ) project for example has groups, which allow you to set e.g. an admin group and then assign people to it. I think this helps a lot with managing policies!
I have been there many many times. This is the reason for writing that library, because there are no good solutions that cover 99% of your cases. RBAC is limited, ACL is a managing nightmare, DAC is also limited, and so on. What really hit me where those AWS IAM policies which are plain beautiful, hence this library.
However, usually major programming languages have some sort of ACL/RBAC module around.
Sorry, but if you had read the README you would probably have noticed that it does not matter if you use Google Auth, LDAP, MySQL or anything else. Subjects are just string identifiers, so it works per definition with everything, including LDAP.
This is a good example for separation of concerns. LDAP is for authentication, ladon is for Authorization. Don't mix those.