statusoptional: Embed nil check in checkStatusStruct

[mandre]

Return early from the method when statusType is nil, as we can't reliably expect all callers to check for passed arguments before calling the function.

Hopefully fixes #90

[k8s-ci-robot]

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[sivchari]

/lgtm

[JoelSpeed]

Change makes sense, but, do you happen to know which API triggered this? Would be good to be able to add a test case to prevent this regressing in the future

[mandre]

Change makes sense, but, do you happen to know which API triggered this? Would be good to be able to add a test case to prevent this regressing in the future

Sorry, I don't. I've seen the error on https://github.com/k-orc/openstack-resource-controller/ main, if you want to take a look. It's unlikely I'll have a chance to add a regression test this week.

[everettraven]

It looks like it is being triggered by

kube-api-linter/pkg/analysis/statusoptional/analyzer.go

Lines 243 to 260 in 6df69a1

	func getStructFromField(pass *analysis.Pass, field *ast.Field) *ast.StructType {
	ident, ok := field.Type.(*ast.Ident)
	if !ok {
	return nil
	}
	typeSpec, ok := utils.LookupTypeSpec(pass, ident)
	if !ok {
	return nil
	}
	structType, ok := typeSpec.Type.(*ast.StructType)
	if !ok {
	return nil
	}
	return structType
	}

returning nil

This is called when checking structs that are inlined:

kube-api-linter/pkg/analysis/statusoptional/analyzer.go

Lines 116 to 117 in 6df69a1

	// Check embedded structs recursively
	a.checkStatusStruct(pass, getStructFromField(pass, childField), markersAccess, jsonTags)

While this change solves the panic, is there an underlying issue here in attempting to grab a struct type from an inlined field?