HelpExec is a standard exec method for displaying help information about a command.

NewDefaultIO returns a default command io that utilizes standard input / output / error.

NewEmptyConfig creates a new instance of the empty configuration.

NewTestIO returns a test command io that only sets standard input (to avoid panics).

Command is a simple wrapper for gnoland commands.

EmptyConfig is an empty command configuration that should be substituted in commands that require one.

Metadata contains basic help information about a command.

Config defines the command config interface that holds flag values and execution logic.

IO holds settable command input, output and error buffers.

ExecMethod executes the command using the specified config.

ExitCodeError is an error to terminate the program without printing any error, but passing in the given exit code to os.Exit.

StringArr defines the custom flag type that represents an array of string values.