JSON references to files relative to schema

[roddypratt]

I'm trying to use the fetchDocument/freeDocument callbacks to load $ref schemas.

My understanding is that if file c:/my/schemas/test.json contains something like this:

                "foo": {
                    "description": "hello",
                    "$ref": "commonschema.json#/$defs/foo"
                },

.. that the validator should look for a file c:/my/schemas/commonschema.json?

The fetchDocument callback is passed commonschema.json, but how do I know the directory containing the parent schema?

I'm probably missing something obvious here....

[roddypratt]

I'm probably missing something obvious here....

... which is that you can use std::bind() to pass the original schema path to the callback. However, I'm not sure that's going to do the right thing with deeply nested refs. If a refs b which refs c, then AIUI c should be relative to b rather than a?