A JSV.Resolver implementation that resolves URIs pointing to the application code base or JSV code base.

A custom resolver implementation should delegate jsv: prefixed URIs to this module to enable support of the internal resolutions features.

Module based schemas

This resolver will resolve jsv:module:MODULE URIs where MODULE is a string representation of an Elixir module. Modules pointed at with such references MUST export a json_schema/0 function that returns a normalized JSON schema with binary keys and values.

Security considerations

This resolver is always included in the resolver chain used by JSV.build/2, so any schema, including a schema obtained from external input, can contain a jsv:module: reference. Resolving such a reference calls json_schema/0 on the target module.

The reachable surface is narrow: only modules already known by the runtime can be referenced, the invoked function name and arity are fixed, and errors raised during resolution are returned as build errors. Keep json_schema/0 implementations pure, building and returning the schema data, so that resolving a module reference stays free of side effects.