// Simple example always updates the config when file changes are detected.
func simple(parser *args.ArgParser) args.WatchCancelFunc {
// Get our current config
appConf := parser.GetOpts()
configFile := appConf.String("config-file")
// Watch the file every time.Second and call func(err error){} when the file is modified
cancelWatch, err := args.WatchFile(configFile, time.Second, func(err error) {
if err != nil {
fmt.Printf("Watch Error %s\n", err.Error())
return
}
// You can safely ignore the returned Options{} object here.
// the next call to GetOpts() from within the handler will
// pick up the newly parsed config
appConf, err = parser.FromINIFile(configFile)
if err != nil {
fmt.Printf("Failed to load updated config - %s\n", err.Error())
return
}
})
if err != nil {
fmt.Printf("Unable to start watch '%s' - %s", configFile, err.Error())
}
return cancelWatch
}
