Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When generating c code for url paths that require replacing parameters in the url path the section that does the url path replacement is generated twice.

openapi-generator version

Tried with openapi-generator and openapi-generator-cli 7.1.0 and latest master (7.2.0) SNAPSHOT.

OpenAPI declaration file content or url

The following simplified yaml schema passes validation and is enough to reproduce the error

openapi: 3.0.3
info:
  title: API
  version: 1.0.0
  description: API
paths:
  /api/gates/{id}/:
    get:
      operationId: gates_retrieve
      parameters:
      - in: path
        name: id
        schema:
          type: string
          format: uuid
        description: A UUID string identifying this Gate.
        required: true
      tags:
      - gates
      security:
      - jwtAuth: []
      - {}
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Gate'
          description: ''
components:
  schemas:
    Gate:
      type: object
      properties:
        id:
          type: string
          format: uuid
          readOnly: true
        name:
          type: string
          maxLength: 255
        description:
          type: string
          maxLength: 255
      required:
      - id
      - name
  securitySchemes:
    jwtAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

Generation Details

java -jar ../openapi-generator-cli-7.2.0-20231220.132735-115.jar generate -g c -i ../schema.yaml

Steps to reproduce

Use the above command to generate the C api. Examine api/GatesAPI.c line 31 - 47 and witness the following section of duplicated code. In particular notice that char* localVarToReplace_id is declared twice which causes a compile time error.

    // Path Params
    long sizeOfPathParams_id = strlen(id)+3 + strlen("{ id }");
    if(id == NULL) {
        goto end;
    }
    char* localVarToReplace_id = malloc(sizeOfPathParams_id);
    sprintf(localVarToReplace_id, "{%s}", "id");

    localVarPath = strReplace(localVarPath, localVarToReplace_id, id);
    if(id == NULL) {
        goto end;
    }
    char* localVarToReplace_id = malloc(sizeOfPathParams_id);
    sprintf(localVarToReplace_id, "{%s}", "id");

    localVarPath = strReplace(localVarPath, localVarToReplace_id, id);

Related issues/PRs

I did some searching for this particular bit of duplicated code and could not find anything.

Suggest a fix

Out of curiosity I went looking for the C generator files but it was not obvious to me where they are located, this seems like a probable cut/paste error during refactoring or something like that and I could probably make an attempt at fixing it myself if I could get a little pointer to where in the repo the affected files might be.

Thanks!