Figure out how to print what schema file is the source of an error

[robherring]

The validation error messages are hard to understand. Part of the problem is how track down what schema causes an error.

We have the top schema file already available, but any $ref is not followed.

[AlexanderStein]

Is commit c38438e ("dt-validate: Print the schema file causing the error", 2020-08-19) the fix for this?

[robherring]

Partially, but really I'd like $ref's to be followed and possibly go down to the exact schema that's causing the error. We have the "schema path" in the error info, but that doesn't start at the top of the file necessarily.