first functional version

cmd/tpstate/init.go

@@ -152,28 +152,30 @@ func initialize() {
 	setLogLevel(config.LogLevel)
 	log.SetOutput(config.Log)
 
+	// check to make sure options were formatted correctly and can be parsed
 	config.CalculateDate, err = time.Parse(config.TimeFormat, dt)
 	if err != nil {
 		runError(fmt.Sprintf("Unable to parse time: %v\n", err))
 	}
-
 	config.TimeZone, err = time.LoadLocation(tz)
 	if err != nil {
 		runError(fmt.Sprintf("Unable to parse time zone: %v\n", err))
 	}
 
+	// check to see if the program was called correctly
 	if config.On && config.Off {
 		runError("Can not set '-on' and '-off' at the same time.")
 	}
-
 	if config.Host == "" && (config.On || config.Off || config.GetState) {
 		runError("Must supply '-host' with '-on', '-off', '-get-state'.")
 	}
+	if config.NextSunrise && config.NextSunset {
+		runError("Can not set '-next-sunrise' and '-next-sunset' at the same time.")
+	}
 
 	// Get timezone offset
 	_, tzOffset := config.CalculateDate.In(config.TimeZone).Zone()
 	config.SunRiseSet.UtcOffset = float64(tzOffset / 60 / 60)
-
 }
 
 func runError(errorMsg string) {