How do I refer to external `securitySchema` object ?

[yuji38kwmt]

I want to split the following file.

openapi: "3.0.0"
info:
  version: 1.0.0
  title: Swagger Petstore
  license:
    name: MIT
servers:
  - url: http://petstore.swagger.io/v1
paths:
  /pets/{petId}:
    get:
      summary: Get Pet
      operationId: showPetById
      security:
      - Everyone: []      
      tags:
        - animals
      parameters:
        - name: petId
          in: path
          required: true
          description: The id of the pet to retrieve
          schema:
            type: string
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Pet"
components:
  securitySchemes:
    Everyone:
      description: everyone
      type: "apiKey"
      name: "Authorization"
      in: "header"
  schemas:
    Pet:
      required:
        - id
        - name
      properties:
        id:
          type: integer
          format: int64
        name:
          type: string
        tag:
          type: string

I write components object to external file.

petstore-parent.yaml

openapi: "3.0.0"
info:
  version: 1.0.0
  title: Swagger Petstore
  license:
    name: MIT
servers:
  - url: http://petstore.swagger.io/v1
paths:
  /pets/{petId}:
    get:
      summary: Get Pet
      operationId: showPetById
      security:
      - Everyone: []      
      tags:
        - animals
      parameters:
        - name: petId
          in: path
          required: true
          description: The id of the pet to retrieve
          schema:
            type: string
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "./petstore-child.yaml#/components/schemas/Pet"

petstore-child.yaml

components:
  securitySchemes:
    Everyone:
      description: everyone
      type: "apiKey"
      name: "Authorization"
      in: "header"
  schemas:
    Pet:
      required:
        - id
        - name
      properties:
        id:
          type: integer
          format: int64
        name:
          type: string
        tag:
          type: string

But I do not know how I refer to external securitySchema object.

    get:
      summary: Get Pet
      operationId: showPetById
      security:
      - Everyone: []      

How do I refer to external securitySchema object ?

[handrews]

Hmm... I think this boils down to a question of the scope of the SecuritySchemes section of the Components Object. Since the Security Requirement Object just uses the name from the Components Object instead of a $ref and a URI to it, there's a question of how a tool "knows" where to look for the Components Object. Presumably, it's only looking in the local file.

I'm not sure how this could be made to work for external files. In the schema example with the $ref, the value of $ref is a URI that tells how to find the external file, but there is nowhere to put such a thing in the Security Requirement Object.

@OAI/tsc is this something we should consider for OAS 3.1? Would it be possible to also allow a $ref somehow?

[handrews]

Consolidating under #3853 and closing