print version (#13)

Reviewed-on: #13
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

main.go

@@ -1,11 +1,13 @@
 package main
 
+import "flag"
 import "fmt"
 import "os"
+
 import "git.kundeng.us/phoenix/clean_file/parser"
+import "git.kundeng.us/phoenix/clean_file/version"
 
 func main() {
-	fmt.Println("clean_file")
 	args := os.Args
 
 	if len(args) < 2 {
@@ -13,6 +15,15 @@ func main() {
 		os.Exit(-1)
 	}
 
+	versionFlag := flag.Bool("version", false, "Print version information")
+	flag.Parse()
+
+	if *versionFlag {
+		fmt.Println(version.String())
+		return
+	}
+
+	fmt.Println("clean_file")
 	filepath := args[1]
 
 	fmt.Println("File path:", filepath)