BUG: lower case enum converted to upper case + fixing PR provided

[iOSonntag]

Steps to reproduce

We have an internal guideline that prefixes every enum with the letter k (lower case) enforced by a custom Dart linter. Currently the swagger_parser ignores the openapi spec and applies pascal camel case regardless.

1. copy the provided openapi spec (includes correct enum name)
2. run dart run swagger_parser && dart run build_runner build
3. find generated k_user_status.dart

Even trying to apply smart regex in replacement config gets overwritten by case-fixing logic.

The PR #459 fixes that adds a new config key named preserve_schema_casing which defaults to false to preserve legacy behavior. Upon activation, it respects the exact casings in the openapi spec.

Expected results

... enum kUserStatus { ...

Actual results

... enum KUserStatus { ...

Your OpenApi snippet

{
  "openapi": "3.0.2",
  "paths": {
    "/something": {
      "patch": {
        "parameters": [],
        "operationId": "changeStatus",
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/ChangeStatusRequest"
              }
            }
          }
        },
        "responses": {}
      }
    }
  },
  "components": {
    "schemas": {
      "kUserStatus": {
        "type": "string",
        "enum": [
          "PENDING",
          "ACTIVE"
        ],
        "title": "kUserStatus"
      },
      "ChangeStatusRequest": {
        "type": "object",
        "properties": {
          "newStatus": {
            "$ref": "#/components/schemas/kUserStatus"
          }
        },
        "title": "ChangeStatusRequest"
      }
    }
  }
}

Code sample

Code sample

dart run swagger_parser && dart run build_runner build

Logs

Logs

Not needed.

Dart version and used packages versions

Dart version

3.11.5 (stable) macos_arm64

Packages version

1.43.1