[Bug]: openapi-generator 7.4.0 fails to resolve refs to files

[fhamelin-1a]

Package name

schematics

Package version

11.0.1

Reproduction steps

You can ask me in Teams and I'll provide a reproduction .zip

Step 1: create models

OTTER_ROOT=todefine
mkdir ama-sdk-repro && cd ama-sdk-repro && mkdir models
cp $OTTER_ROOT/packages/@ama-sdk/showcase-sdk/openapi.yml ./models/pet-specs-untouched.yaml
cp ./models/pet-specs-untouched.yaml ./models/pet-specs-split.yaml
touch ./models/pet-response.yaml

Step 2: Manually modify pet-specs-split.yaml

Modify the paths./pet.post.responses.'200' to point to a components.response ok-pet:

  /pet:
    post:
      tags:
        - pet
      summary: Add a new pet to the store
      description: Add a new pet to the store
      operationId: addPet
      responses:
        '200':
          $ref: '#/components/responses/ok-pet'

Create the components.response ok-pet:

  responses:
    ok-pet:
      description: Successful Pet operation
      content:
        application/xml:
          schema:
            $ref: './pet-response.yaml'
        application/json:
          schema:
            $ref: './pet-response.yaml'

In pet-response.yaml, modify the refs to point to pet-specs-split.yaml#/components. Also add a title:

x-swagger-router-model: io.swagger.petstore.model.Pet
title: Pet
type: object
required:
  - name
  - photoUrls
properties:
  id:
    type: integer
    format: int64
    example: 10
  name:
    type: string
    example: doggie
  category:
    $ref: './pet-specs-split.yaml#/components/schemas/Category'
  photoUrls:
    type: array
    xml:
      wrapped: true
    items:
      type: string
      xml:
        name: photoUrl
  tags:
    type: array
    xml:
      wrapped: true
    items:
      $ref: './pet-specs-split.yaml#/components/schemas/Tag'
      xml:
        name: tag
  status:
    type: string
    description: pet status in the store
    enum:
      - available
      - pending
      - sold
xml:
  name: pet

Step 3: generate SDKs for version 9.6.x and 11.0.x

npm create @ama-sdk@9.6.3 typescript sdk-otter-9 -- --spec-path ./models/pet-specs-untouched.yaml
npm create @ama-sdk typescript sdk-otter-11 -- --spec-path ./models/pet-specs-untouched.yaml

Note: I had troubles with --spec-path and --generator-key on v11 and had to manually modify the scripts in package.json.

Also, I've duplicated the spec:regen script so that it targets both split & untouched specs:

// v9
"spec:regen:untouched": "npm run generate -- --spec-path ../models/pet-specs-untouched.yaml && npm run clear-index",
"spec:regen:split": "npm run generate -- --spec-path ../models/pet-specs-split.yaml && npm run clear-index",

// v11
"spec:regen:untouched": "npm run generate -- --spec-path ../models/pet-specs-untouched.yaml --generator-key sdk-otter-11 && amasdk-clear-index",
"spec:regen:split": "npm run generate -- --spec-path ../models/pet-specs-split.yaml --generator-key sdk-otter-11 && amasdk-clear-index",

Current result

• npm run spec:regen:untouched works for both v9 and v11
• npm run spec:regen:split works for v9
• npm run spec:regen:split fails for v11 with below exception

Did set selected version to 7.4.0
[main] WARN  io.swagger.v3.parser.OpenAPIV3Parser - Exception while resolving:
java.lang.RuntimeException: Unable to load RELATIVE ref: ./pet-response.yaml path: /home/fhamelin/git_clones/ama-sdk-repro/sdk-otter-11
        at io.swagger.v3.parser.util.RefUtils.readExternalRef(RefUtils.java:220)
        at io.swagger.v3.parser.ResolverCache.loadRef(ResolverCache.java:150)
        at io.swagger.v3.parser.processors.ExternalRefProcessor.processRefToExternalSchema(ExternalRefProcessor.java:88)
        at io.swagger.v3.parser.processors.SchemaProcessor.processReferenceSchema(SchemaProcessor.java:236)
        at io.swagger.v3.parser.processors.SchemaProcessor.processSchema(SchemaProcessor.java:60)
        at io.swagger.v3.parser.processors.ResponseProcessor.processResponse(ResponseProcessor.java:56)
        at io.swagger.v3.parser.processors.OperationProcessor.processOperation(OperationProcessor.java:86)
        at io.swagger.v3.parser.processors.PathsProcessor.processPaths(PathsProcessor.java:88)
        at io.swagger.v3.parser.OpenAPIResolver.resolve(OpenAPIResolver.java:72)
        at io.swagger.v3.parser.OpenAPIResolver.resolve(OpenAPIResolver.java:59)
        at io.swagger.v3.parser.OpenAPIV3Parser.resolve(OpenAPIV3Parser.java:238)
        at io.swagger.v3.parser.OpenAPIV3Parser.readContents(OpenAPIV3Parser.java:181)
        at io.swagger.v3.parser.OpenAPIV3Parser.readLocation(OpenAPIV3Parser.java:97)
        at io.swagger.parser.OpenAPIParser.readLocation(OpenAPIParser.java:16)
        at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:686)
        at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:744)
        at org.openapitools.codegen.cmd.Generate.execute(Generate.java:527)
        at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
        at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)
Caused by: java.lang.RuntimeException: Could not find ./pet-response.yaml on the classpath
        at io.swagger.v3.parser.util.ClasspathHelper.loadFileFromClasspath(ClasspathHelper.java:33)
        at io.swagger.v3.parser.util.RefUtils.readExternalRef(RefUtils.java:214)
        ... 18 common frames omitted
[main] WARN  o.o.codegen.utils.ModelUtils - Failed to get the schema name: ./pet-response.yaml
[main] WARN  o.o.codegen.utils.ModelUtils - Failed to get the schema name: ./pet-response.yaml
[main] WARN  o.o.codegen.utils.ModelUtils - Failed to get the schema name: ./pet-response.yaml
[main] WARN  o.o.codegen.utils.ModelUtils - Failed to get the schema name: ./pet-response.yaml
Exception in thread "main" org.openapitools.codegen.SpecValidationException: There were issues with the specification. The option can be disabled via validateSpec (Maven/Gradle) or --skip-validate-spec (CLI).
 | Error count: 1, Warning count: 2
Errors:
        -Unable to load RELATIVE ref: ./pet-response.yaml path: /home/fhamelin/git_clones/ama-sdk-repro/sdk-otter-11
Warnings:
        -Unable to load RELATIVE ref: ./pet-response.yaml path: /home/fhamelin/git_clones/ama-sdk-repro/sdk-otter-11

        at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:717)
        at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:744)
        at org.openapitools.codegen.cmd.Generate.execute(Generate.java:527)
        at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
        at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)
Error: OpenApiGeneratorCli failed to run OpenApiGenerator with command 'openapi-generator-cli generate --custom-generator=/home/fhamelin/git_clones/ama-sdk-repro/sdk-otter-11/node_modules/@ama-sdk/schematics/schematics/typescript/core/openapi-codegen-typescript/target/typescriptFetch-openapi-generator.jar -g typescriptFetch -i open-api.yaml -o .

Expected result

npm run spec:regen:split should work on v11 (and v10 which I haven't tried)

Additional comments

• Using JDK 11.0.14.1-jbr
• For the failing case, it uses openapi-generator 7.4.0. Tried to upgrade to openapi-generator 7.7.0 but same issue
• The working case uses openapi-generator 6.6.0
• When generating the typescriptFetch-openapi-generator.jar for 7.7.0, I had to modify the file AbstractTypeScriptClientCodegen because they moved the getSchemaItems method to ModelUtils (see DefaultCodegen.java). Note that the exception above has warnings for ModelUtils, so it could be related.
• This kind of issue seems to be reccurrent with openapi-generator. It gets fixed then breaks again:
  [BUG] openapi-generator 7.2.0 is no longer able to resolve local $refs OpenAPITools/openapi-generator#17554
  [BUG] openapi-generator 7.5.0 is no longer able to resolve local $refs OpenAPITools/openapi-generator#18429

[fpaul-1A]

This seems to be a regression linked to #1572
We are now copying the yaml file before sending it to openapi generator which breaks all the relative paths
Placing the referenced files at the root of the generated sdks make it works (copy ama-sdk-repro/models/pet-response.yaml into ama-sdk-repro/sdk-otter-11/pet-response.yaml)

We need to discuss to find a proper fix