// A go-options compatible parser.
func myParse(s *options.OptionSpec, option string, value *string) {
if value == nil {
switch s.GetCanonical(option) {
case "help":
s.PrintUsageAndExit("")
case "pipe":
pipe = true
case "verbose":
verbose = true
case "version":
{
fmt.Printf("prolix %s\n", versionString)
os.Exit(0)
}
default:
s.PrintUsageAndExit("Unknown option: " + option)
}
} else {
switch s.GetCanonical(option) {
case "log":
log = *value
case "ignore-re":
ignoreRe = append(ignoreRe, *value)
case "ignore-line":
ignoreLine = append(ignoreLine, *value)
case "ignore-substring":
ignoreSubstring = append(ignoreSubstring, *value)
case "snippet":
snippet = append(snippet, *value)
default:
s.PrintUsageAndExit("Unknown option: " + option)
}
}
}
// Example custom option callback
func MyParseCallback(spec *options.OptionSpec, option string, argument *string) {
if argument != nil {
switch spec.GetCanonical(option) {
case "input-encoding":
in = *argument
case "output-encoding":
out = *argument
case "repeat":
fmt.Sscanf(*argument, "%d", &r)
case "cookie-chance":
fmt.Sscanf(*argument, "%f", &c)
cInt = int64(c * 1000)
default:
spec.PrintUsageAndExit("Unknown option: " + option)
}
} else {
switch spec.GetCanonical(option) {
case "number":
n = true
case "escape":
e = true
case "verbose":
v++
default:
if option == "help" {
spec.PrintUsageAndExit("") // No error
} else {
spec.PrintUsageAndExit("Unknown option: " + option)
}
}
}
}