kubernetes/staging/src/k8s.io/component-base/cli/run.go

// Run provides the common boilerplate code around executing a cobra command.
// For example, it ensures that logging is set up properly. Logging
// flags get added to the command line if not added already. Flags get normalized
// so that help texts show them with hyphens. Underscores are accepted
// as alternative for the command parameters.
//
// Run tries to be smart about how to print errors that are returned by the
// command: before logging is known to be set up, it prints them as plain text
// to stderr. This covers command line flag parse errors and unknown commands.
// Afterwards it logs them. This covers runtime errors.
//
// Commands like kubectl where logging is not normally part of the runtime output
// should use RunNoErrOutput instead and deal with the returned error themselves.
func Run(cmd *cobra.Command) int { … }

// RunNoErrOutput is a version of Run which returns the cobra command error
// instead of printing it.
func RunNoErrOutput(cmd *cobra.Command) error { … }

func run(cmd *cobra.Command) (logsInitialized bool, err error) { … }