Java/Ruby client gen

[pbespechnyi]

Hey Linode Team,

I'm trying to generate client based on the openapi spec in this repo, but cli says that spec is invalid (tried java, ruby).

openapi-generator generate -i openapi.yaml -g java -o ./gen

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: 30, Warning count: 2
Errors:
	-attribute components.schemas.DatabasePostgreSQL.status is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQL.updated is not of type `schema`
	-attribute components.schemas.SecurityQuestionsPost.response is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.replication_commit_type is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.cluster_size is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.region is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.replication_type is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.count is not of type `schema`
	-attribute components.schemas.LinodeRequest.authorized_users is not of type `schema`
	-attribute components.schemas.LinodeRequest.stackscript_id is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.ssl_connection is not of type `schema`
	-attribute components.schemas.DiskRequest.filesystem is not of type `schema`
	-attribute components.schemas.LinodeRequest.stackscript_data is not of type `schema`
	-attribute components.schemas.LinodeRequest.image is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQL.created is not of type `schema`
	-attribute components.schemas.DatabaseMySQL.hosts is not of type `schema`
	-attribute components.schemas.DatabaseMongoDBRequest.storage_engine is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.allow_list is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.items is not of type `schema`
	-attribute components.schemas.DatabaseMongoDBRequest.compression_type is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.tags is not of type `schema`
	-attribute components.schemas.DiskRequest.label is not of type `schema`
	-attribute components.schemas.Volume.id is not of type `schema`
	-attribute components.schemas.SecurityQuestionsPost.question is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.encrypted is not of type `schema`
	-attribute components.schemas.LinodeRequest.authorized_keys is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.type is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQL.updates is not of type `schema`
	-attribute components.schemas.DatabaseMongoDBRequest.replica_set is not of type `schema`
	-attribute components.schemas.LinodeRequest.root_pass is not of type `schema`
Warnings:
	-attribute components.schemas.DatabasePostgreSQL.status is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQL.updated is not of type `schema`
	-attribute components.schemas.SecurityQuestionsPost.response is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.replication_commit_type is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.cluster_size is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.region is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.replication_type is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.count is not of type `schema`
	-attribute components.schemas.LinodeRequest.authorized_users is not of type `schema`
	-attribute components.schemas.LinodeRequest.stackscript_id is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.ssl_connection is not of type `schema`
	-attribute components.schemas.DiskRequest.filesystem is not of type `schema`
	-attribute components.schemas.LinodeRequest.stackscript_data is not of type `schema`
	-attribute components.schemas.LinodeRequest.image is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQL.created is not of type `schema`
	-attribute components.schemas.DatabaseMySQL.hosts is not of type `schema`
	-attribute components.schemas.DatabaseMongoDBRequest.storage_engine is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.allow_list is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.items is not of type `schema`
	-attribute components.schemas.DatabaseMongoDBRequest.compression_type is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.tags is not of type `schema`
	-attribute components.schemas.DiskRequest.label is not of type `schema`
	-attribute components.schemas.Volume.id is not of type `schema`
	-attribute components.schemas.SecurityQuestionsPost.question is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQLRequest.encrypted is not of type `schema`
	-attribute components.schemas.LinodeRequest.authorized_keys is not of type `schema`
	-attribute components.schemas.LKENodePoolRequestBody.type is not of type `schema`
	-attribute components.schemas.DatabasePostgreSQL.updates is not of type `schema`
	-attribute components.schemas.DatabaseMongoDBRequest.replica_set is not of type `schema`
	-attribute components.schemas.LinodeRequest.root_pass is not of type `schema`

	at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:604)
	at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:631)
	at org.openapitools.codegen.cmd.Generate.execute(Generate.java:457)
	at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
	at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)

If I disable spec validation, if fails with NPE:

openapi-generator generate -i openapi.yaml -g java -o ./gen --skip-validate-spec

Output: https://gist.github.com/pbespechnyi/fe1df599ae6b8b732a1b6bf48fcbba6a

[uphlewis]

Similarly, trying to generate a php client using OpenAPI Generator v6.2.0, with --skip-validate-spec it fails with Could not process model 'updateFirewallRules_request'.Please make sure that your schema is correct!:

$ openapi-generator generate -i ./openapi.yml -g php -o ./OpenApi/ --skip-validate-spec
[...]
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
[main] WARN  o.o.codegen.utils.ModelUtils - #/components/schemas/Firewall/properties/rules is not defined
Exception in thread "main" java.lang.RuntimeException: Could not process model 'updateFirewallRules_request'.Please make sure that your schema is correct!
        at org.openapitools.codegen.DefaultGenerator.generateModels(DefaultGenerator.java:518)
        at org.openapitools.codegen.DefaultGenerator.generate(DefaultGenerator.java:912)
        at org.openapitools.codegen.cmd.Generate.execute(Generate.java:465)
        at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
        at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)
Caused by: java.lang.NullPointerException: Cannot invoke "io.swagger.v3.oas.models.media.Schema.getDiscriminator()" because "childSchema" is null
        at org.openapitools.codegen.DefaultCodegen.addImport(DefaultCodegen.java:5497)
        at org.openapitools.codegen.DefaultCodegen.updateModelForComposedSchema(DefaultCodegen.java:2633)
        at org.openapitools.codegen.DefaultCodegen.fromModel(DefaultCodegen.java:2963)
        at org.openapitools.codegen.DefaultGenerator.processModels(DefaultGenerator.java:1291)
        at org.openapitools.codegen.DefaultGenerator.generateModels(DefaultGenerator.java:513)
        ... 4 more