Describe the bug
datamodel-code-generator doesn't support references to schemas with both minus (-) and dots (.) because file names are not sanitized. This lead to a crash because invalid python code is passed to black, which raises an exception.

This issue was (partially) fixed in:

• json schema: minus in name results in invalid python module name #131 <- Match this issue
• Generated python file names contain invalid caharacters #1141 <- Partially match this issue (no dots)

May be related to:

• [jsonschema] Invalid import path when referencing files with dots. #2332

It works for references without any dot (.)

For more details & reproducible example: https://github.com/ilovelinux/datamodel-code-generator-issue-2336

To Reproduce

Example schema:

array-commons.schema.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://example.com/array-commons.schema.json",
  "title": "Commons",
  "description": "Commons objects",
  "$defs": {
    "defaultArray": {
      "type": "array",
      "minLength": 1,
      "maxLength": 100
    }
  }
}

products.schema.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://example.com/products.schema.json",
  "title": "Products",
  "description": "The products in the catalog",
  "$ref": "array-commons.schema.json#/$defs/defaultArray",
}

Used commandline:

$ datamodel-codegen --input inputs/ --input-file-type jsonschema --output outputs/

Expected behavior

It should generate working code.

Version:

• OS: Linux
• Python version: 3.13
• datamodel-code-generator version: 0.28.2

Additional context

For more details & reproducible example: https://github.com/ilovelinux/datamodel-code-generator-issue-2336