cli

type Command struct {
	// Name of command usually short (e.g. "list")
	Name string
	// Short description of the command (e.g. "list all config parameters")
	Info string
	// The usage string may have multiple lines.
	Usage string
	// Longer description that will be formatted.
	Description string
	// Options list. Note these options must immediately follow the
	// command in the command line and any non-option will stop the
	// processing of the options for this command.
	Options []*Option
	// List of all subcommands for this command.
	Subcommands []*Command
	// Function that executes the command.
	Exec func(args []string) error
}

type CommandError struct {
	Name    string
	Message string
	Wrapped error
}

type Option struct {
	// long name of the option; must be used with prefix '--'
	Name string
	// short option; must be in [A-Za-z0-9]
	Short rune
	// long names additional to name
	Names []string
	// short runes additional to Names
	Shorts []rune
	// Custom usage information about options
	UsageInfo string
	// description of the option
	Description string
	// HasParam defines whether the option has parameter
	HasParam bool
	// OptionalParam
	OptionalParam bool
	// ParamType describes the type of the parameter
	ParamType string
	// Default param value.
	Default string
	// SetValue set the value to the parameter string given and informs
	// whether there was a parameter or not.
	SetValue func(name string, param string, noParam bool) error
	// ResetValue can be used to reset the value. If it is nil then
	// opt.SetValue(opt.Default, false) will be called.
	ResetValue func()
}

type OptionError struct {
	Option  string
	Msg     string
	Wrapped error
}