NewFlagSet creates a new flag set.

NewFlagSets creates a new flag sets.

RunCustom allows passing in a base command template to pass to other commands.

Default value to use.

BoolPtr is a bool which is aware if it has been set.

-- BoolVar and boolValue.

-- DurationVar and durationValue.

FlagSet is a grouped wrapper around a real flag set and a grouped flag set.

FlagSets is a group of flag sets.

-- Float64Var and float64Value.

-- Int64Var and int64Value.

-- IntVar and intValue.

-- StringMapVar and stringMapValue.

-- StringSliceVar and stringSliceValue.

-- StringVar and stringValue.

-- TimeVar and timeValue.

-- Uint64Var and uint64Value.

-- UintVar && uintValue.

-- VarFlag.

VersionCommand is a Command implementation prints the version.

FlagBool is an interface which boolean flags implement.

FlagExample is an interface which declares an example value.

FlagVisibility is an interface which declares whether a flag should be hidden from help and completions.

Identify the allowable formats, identified by the minimum precision accepted.