main.go

@@ -17,43 +17,27 @@ import (
 )
 
 var (
-	gVersion = "0.2"
-
-	Usage = func() {
-		fmt.Printf("deldify v%s\n", gVersion)
-		fmt.Printf("Usage: deldify [-h|--help] [filename]\n")
-		fmt.Printf("       read stdin if filename is empty or '-'\n")
-		fmt.Printf("Flags:\n")
-		fmt.Printf("       -h|--help: Display help\n")
-		os.Exit(1)
-	}
+	gVersion = "0.0.1"
 )
 
-
 func main() {
 	var input string
 
-	flag.Usage = Usage
-
 	flag.Parse()
-
-	if len(flag.Args()) == 0 {
-		input = "-"
+	if len(flag.Args()) < 1 {
+		fmt.Printf("deldify v%s\n", gVersion)
+		fmt.Printf("Usage: deldify filename\n")
+		os.Exit(1)
 	}
+	input = flag.Args()[0]
 
-	// open file or stdin
-	var f *os.File
-
-	if !strings.EqualFold(input, "-") {
-		f, err := os.Open(input)
-		if err != nil {
-			fmt.Errorf("%v\n", err)
-		}
-		// remember to close the file at the end of the program
-		defer f.Close()
-	} else {
-		f = os.Stdin
+	// open file
+	f, err := os.Open(input)
+	if err != nil {
+		fmt.Errorf("%v\n", err)
 	}
+	// remember to close the file at the end of the program
+	defer f.Close()
 
 	// read the file line by line using scanner
 	scanner := bufio.NewScanner(f)