func helpExec(options Options, args []string, databasePath string) (error, warnings) {
var colour bool
if options.HasOption("--color") {
when := options.Get("--color").Argument
switch when {
case "auto":
colour = terminal.Colour() && terminal.Width() > 0
case "":
case "always":
colour = true
case "never":
colour = false
default:
return fmt.Errorf("invalid argument '%v' for '--color'", when), nil
}
} else {
colour = terminal.Colour() && terminal.Width() > 0
}
if options.HasOption("--list") {
listCommands()
} else {
switch len(args) {
case 0:
summary(colour)
default:
commandName := args[0]
describeCommand(commandName, colour)
}
}
return nil, nil
}
func useColour(options Options) (bool, error) {
when := "auto"
if options.HasOption("--color") {
when = options.Get("--color").Argument
}
switch when {
case "":
case "auto":
return terminal.Colour() && terminal.Width() > 0, nil
case "always":
return true, nil
case "never":
return false, nil
}
return false, fmt.Errorf("invalid argument '%v' for '--color'", when)
}