kubernetes/staging/src/k8s.io/apiextensions-apiserver/pkg/controller/openapi/builder/merge.go

const metadataGV …

const autoscalingGV …

// MergeSpecs aggregates all OpenAPI specs, reusing the metadata of the first, static spec as the basis.
// The static spec has the highest priority, and its paths and definitions won't get overlapped by
// user-defined CRDs. None of the input is mutated, but input and output share data structures.
func MergeSpecs(staticSpec *spec.Swagger, crdSpecs ...*spec.Swagger) (*spec.Swagger, error) { … }

// mergeSpec copies paths, parameters and definitions from source to dest, mutating dest, but not source.
// We assume that conflicts do not matter.
func mergeSpec(dest, source *spec.Swagger) { … }

// MergeSpecsV3 merges OpenAPI v3 specs for CRDs
// Conflicts belonging to the meta.v1 or autoscaling.v1 group versions are skipped as all CRDs reference those types
// Other conflicts will result in an error
func MergeSpecsV3(crdSpecs ...*spec3.OpenAPI) (*spec3.OpenAPI, error) { … }

// mergeSpecV3 copies paths and definitions from source to dest, mutating dest, but not source.
// Conflicts belonging to the meta.v1 or autoscaling.v1 group versions are skipped as all CRDs reference those types
// Other conflicts will result in an error
func mergeSpecV3(dest, source *spec3.OpenAPI) error { … }