kubernetes/staging/src/k8s.io/apiserver/pkg/admission/config.go

func makeAbs(path, base string) (string, error) { … }

// ReadAdmissionConfiguration reads the admission configuration at the specified path.
// It returns the loaded admission configuration if the input file aligns with the required syntax.
// If it does not align with the provided syntax, it returns a default configuration for the enumerated
// set of pluginNames whose config location references the specified configFilePath.
// It does this to preserve backward compatibility when admission control files were opaque.
// It returns an error if the file did not exist.
func ReadAdmissionConfiguration(pluginNames []string, configFilePath string, configScheme *runtime.Scheme) (ConfigProvider, error) { … }

type configProvider …

// GetAdmissionPluginConfigurationFor returns a reader that holds the admission plugin configuration.
func GetAdmissionPluginConfigurationFor(pluginCfg apiserver.AdmissionPluginConfiguration) (io.Reader, error) { … }

// ConfigFor returns a reader for the specified plugin.
// If no specific configuration is present, we return a nil reader.
func (p configProvider) ConfigFor(pluginName string) (io.Reader, error) { … }