GetAuthPrincipalDifferential compares policies for an auth principal in the working copy to a historical git ref.

Computes a change between HEAD and some reference, like a branch.

GetPolicyChangeDifferentials returns an RSoP differential for every auth principal that involves this policy.

Prints RSoPDifferential tables for all changes made to auth principals and policies between `compareRef` and the current working copy.

A little wrapper for subprocess commands to git.

go:generate stringer -type Mutation.