//! The extension seam for access control. nugitea ships with no users or//! login, so the only implementation today is AllowAll, but the httpgit and//! sshgit transports depend on this trait rather than a concrete decision//! so real auth can be added later without touching them./// Decides whether an operation on a repo is permitted.pub trait Authorizer: Send + Sync {fn allow_pull(&self, repo: &str) -> bool;fn allow_push(&self, repo: &str) -> bool;}/// Permits every pull and push. The default Authorizer.pub struct AllowAll;impl Authorizer for AllowAll {fn allow_pull(&self, _repo: &str) -> bool {true}fn allow_push(&self, _repo: &str) -> bool {true}}