[BUG] Gradle plugin, value of validateSpec is overridden by skipValidateSpec

Created by: iurii-untilov

Description

Please see: https://github.com/OpenAPITools/openapi-generator/blob/b302c16f74fdbf8d6034b924e0906ad60b4d5d29/modules/openapi-generator-gradle-plugin/src/main/kotlin/org/openapitools/generator/gradle/plugin/tasks/GenerateTask.kt#L528

            skipValidateSpec.ifNotEmpty { value ->
                configurator.setValidateSpec(value)
            }

as a result validateSpec is set as value of skipValidateSpec, as by default skipValidateSpec == false it means that validateSpec will be assigned false, and build will not fail even in case of errors in provided swagger / openApi specification.

openapi-generator version

4.0.0-beta2

Command line used for generation

./gradlew openApiGenerate

Steps to reproduce

Run openApiGenerate for invalid swagger/openAPI specification, it should continue even after reporting that errors where found: There were issues with the specification, but validation has been explicitly disabled.

Suggest a fix

Please rewrite it as:

            skipValidateSpec.ifNotEmpty { value ->
                configurator.setSkipValidateSpec(value)
            }