Allow the format on ksuid generated on the fly (#20)

README.md

@@ -102,3 +102,40 @@ $ ./ksuid -f template -t '{{ .Time }}: {{ .Payload }}' $(./ksuid -n 4)
 2017-10-09 21:05:37 -0700 PDT: DF0761769909ABB0C7BB9D66F79FC041
 2017-10-09 21:05:37 -0700 PDT: 1A8F0E3D0BDEB84A5FAD702876F46543
 ```
+
+### Generate detailed versions of new KSUID
+
+Generate a new KSUID with the corresponding time using the time formatting:
+
+```sh
+$ go run cmd/ksuid/main.go -f time -v
+0uk0ava2lavfJwMceJOOEFXEDxl: 2017-10-09 21:56:00 -0700 PDT
+```
+
+Generate 4 new KSUID with details using template formatting:
+
+```sh
+$ ./ksuid -f template -t '{ "timestamp": "{{ .Timestamp }}", "payload": "{{ .Payload }}", "ksuid": "{{.String}}"}' -n 4
+{ "timestamp": "107611700", "payload": "9850EEEC191BF4FF26F99315CE43B0C8", "ksuid": "0uk1Hbc9dQ9pxyTqJ93IUrfhdGq"}
+{ "timestamp": "107611700", "payload": "CC55072555316F45B8CA2D2979D3ED0A", "ksuid": "0uk1HdCJ6hUZKDgcxhpJwUl5ZEI"}
+{ "timestamp": "107611700", "payload": "BA1C205D6177F0992D15EE606AE32238", "ksuid": "0uk1HcdvF0p8C20KtTfdRSB9XIm"}
+{ "timestamp": "107611700", "payload": "67517BA309EA62AE7991B27BB6F2FCAC", "ksuid": "0uk1Ha7hGJ1Q9Xbnkt0yZgNwg3g"}
+```
+
+Display the detailed version of a new KSUID:
+
+```sh
+$ ./ksuid -f inspect
+
+REPRESENTATION:
+
+  String: 0ujzPyRiIAffKhBux4PvQdDqMHY
+     Raw: 066A029C73FC1AA3B2446246D6E89FCD909E8FE8
+
+COMPONENTS:
+
+       Time: 2017-10-09 21:46:20 -0700 PDT
+  Timestamp: 107610780
+    Payload: 73FC1AA3B2446246D6E89FCD909E8FE8
+
+```

cmd/ksuid/main.go

@@ -23,7 +23,7 @@ var (
 
 func init() {
 	flag.IntVar(&count, "n", 1, "Number of KSUIDs to generate when called with no other arguments.")
-	flag.StringVar(&format, "f", "inspect", "One of inspect, time, timestamp, payload, raw, or template.")
+	flag.StringVar(&format, "f", "string", "One of string, inspect, time, timestamp, payload, raw, or template.")
 	flag.StringVar(&tpltxt, "t", "", "The Go template used to format the output.")
 	flag.BoolVar(&verbose, "v", false, "Turn on verbose mode.")
 }
@@ -34,6 +34,8 @@ func main() {
 
 	var print func(ksuid.KSUID)
 	switch format {
+	case "string":
+		print = printString
 	case "inspect":
 		print = printInspect
 	case "time":
@@ -53,9 +55,8 @@ func main() {
 
 	if len(args) == 0 {
 		for i := 0; i < count; i++ {
-			fmt.Println(ksuid.New())
+			args = append(args, ksuid.New().String())
 		}
-		os.Exit(0)
 	}
 
 	var ids []ksuid.KSUID
@@ -77,6 +78,10 @@ func main() {
 	}
 }
 
+func printString(id ksuid.KSUID) {
+	fmt.Println(id.String())
+}
+
 func printInspect(id ksuid.KSUID) {
 	const inspectFormat = `
 REPRESENTATION: