Add a current kind to the CLI only

This new kind on the CLI controls if you just want to print out the
latest version rather than getting the next one.
It makes no changes to the behaviour of the package itself.

cmd/semver/main.go

@@ -17,7 +17,7 @@ func main() {
 	flag.Parse()
 
 	flag.Usage = func() {
-		fmt.Fprint(os.Stderr, "Usage: semver <kind>\nKind can be one of major,minor,patch\n")
+		fmt.Fprint(os.Stderr, "Usage: semver <kind>\nKind can be one of major,minor,patch,current\n")
 		flag.PrintDefaults()
 	}
 
@@ -26,17 +26,12 @@ func main() {
 		os.Exit(1)
 	}
 
-	kind, err := sem.ParseKind(flag.Args()[0])
-	if err != nil {
-		flag.Usage()
-		os.Exit(1)
-	}
-
 	curDir, err := os.Getwd()
 	if err != nil {
 		fmt.Printf("Failed to get working directory: %s\n", err)
 		os.Exit(1)
 	}
+
 	latestVersion, err := sem.GetLatestVersion(curDir, *ignoreNonSemVerTags)
 	if err != nil {
 		if errors.Is(err, sem.ErrNoVersionsAvailable) {
@@ -48,6 +43,20 @@ func main() {
 			os.Exit(1)
 		}
 	}
+
+	k := flag.Args()[0]
+
+	if k == "current" {
+		fmt.Println(latestVersion)
+		os.Exit(0)
+	}
+
+	kind, err := sem.ParseKind(flag.Args()[0])
+	if err != nil {
+		flag.Usage()
+		os.Exit(1)
+	}
+
 	if err := latestVersion.Next(kind); err != nil {
 		fmt.Printf("Failed to get next version: %s\n", err)
 		os.Exit(1)