Updated help text

nsencoder.go

@@ -13,17 +13,29 @@ import (
 func main() {
 	// Define the shift, hex, space, and grouping flags
 	shift := flag.Int("s", 0, "Shift value for alphabet positions (can be negative)")
-	useHex := flag.Bool("x", false, "Encode numbers in hexadecimal")
+	useHex := flag.Bool("x", false, "Encode numbers in hexadecimal instead of decimal")
-	encodeSpaces := flag.Bool("S", false, "Encode spaces as '00'")
+	encodeSpaces := flag.Bool("S", false, "Encodes spaces as '00'")
 	groupSize := flag.Int("g", 2, "Group size for output digits (minimum value of 2, default 2)")
+
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage: %s [options] <<< \"String\"\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "       %s [options] < file.txt\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "       echo \"string\" | %s [options]\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "\nDescription:\n")
+		fmt.Fprintf(os.Stderr, "  A companion program to numberstation, intended to make easy work of making very basic ciphers for numbers station projects.\n")
+		fmt.Fprintf(os.Stderr, "\nOptions:\n")
+		flag.PrintDefaults() // Print the default flag help information
+		fmt.Fprintf(os.Stderr, "\nExamples:\n")
+		fmt.Fprintf(os.Stderr, "  %s -s 2 -g 5 <<< \"This is a test.\"\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "  %s -S -s 16 -x -g 4 < file.txt | numberstation -r\n", os.Args[0])
+	}
+
 	flag.Parse()
 
 	// Check for invalid group size
-	if *groupSize == 1 {
+	if *groupSize < 2 {
 		fmt.Fprintln(os.Stderr, "Error: Minimum group size is 2. Exiting.")
 		os.Exit(1)
-	} else if *groupSize <= 0 {
-		*groupSize = 2
 	}
 
 	// Check if input is being piped or passed as an argument