[BUG][openapi-generator-gradle-plugin] openApiGenerate-option validateSpec has no effect

Description

The task openApiGenerate validates the OpenApi declaration even if the option validateSpec is set to false.

openapi-generator version

5.1.1, master/head

OpenAPI declaration file content or url

• openapi-generator/modules/openapi-generator-gradle-plugin/samples/local-spec/petstore-v3.0-invalid.yaml

Generation Details

Execution failed for task ':openApiGenerate'.

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: 0
Errors:
-attribute info is missing

Steps to reproduce

Gradle build script:

plugins {
  id "org.openapi.generator" version "5.1.1"
}


openApiGenerate {
  validateSpec = false
  generatorName = "typescript-axios"
  inputSpec = "${project.projectDir}/petstore-v3.0-invalid.yaml".toString()
  outputDir = "$buildDir/generated".toString()
}

Related issues/PRs

Suggest a fix

"Quick fix": Move the alternative Option skipValidateSpec next to validateSpec in the description of options in Gradle plugin's README.adoc. Thus, users new to the plugin will see at once, that there is an alternative option that works.

Start by reproducing the Gradle task with petstore-v3.0-invalid.yaml and validateSpec = false, then inspect the openapi-generator-gradle-plugin implementation and its README.adoc option descriptions. Done means the task respects validateSpec = false, or the documentation clearly directs users to the working alternative if that behavior is intentional.