Describe the bug

References to other files don't work.

I have a custom schema that uses file references like so:

{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "$id": "file:Foo.schema.json",
    "title": "A schema file",
    "description": "Schema for validating the serialization of a Foo object.",
    "type": "object",
    "properties": {
        "bar": {
            "$ref": "Bar.schema.json"
        }
}

When calling datamodel-codegen:

$ datamodel-codegen --input /home/user/schemas/Foo.schema.json --output out --input-file-type jsonschema

Only the out folder is created with a Bar.py file.

Expected behavior

The out folder to have both Python files.

Version:

• OS: Ubuntu 22.04.3 LTS
• Python version: Python 3.10.12
• datamodel-code-generator version: 80266b4f6ea09bc7675466af459c7f6617f0c307