✨ Add GetEncoders func for available encoders

cmd/pencode/main.go

@@ -5,24 +5,36 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/ffuf/pencode/pkg/pencode"
 )
 
 func main() {
 	chain := pencode.NewChain()
+
 	flag.Usage = func() {
 		fmt.Printf("pencode - complex payload encoder v%s\n\n", pencode.VERSION)
 		fmt.Printf("Usage: %s ENCODER1 ENCODER2 ENCODER3...\n\n", os.Args[0])
 		fmt.Printf("%s reads input from stdin, which is typically piped from another process.\n\n", os.Args[0])
 		fmt.Printf("Available encoders:\n")
 		chain.Usage()
 	}
+
+	var listMode bool
+	flag.BoolVar(&listMode, "list", false, "list available encoders")
 	flag.Parse()
+
+	if listMode {
+		fmt.Println(strings.Join(chain.GetEncoders(), "\n"))
+		os.Exit(1)
+	}
+
 	if len(os.Args) < 2 {
 		flag.Usage()
 		os.Exit(1)
 	}
+
 	err := chain.Initialize(os.Args[1:])
 	if err != nil {
 		flag.Usage()

pkg/pencode/encoders.go

@@ -68,6 +68,14 @@ func (c *Chain) HasEncoder(name string) bool {
 	return false
 }
 
+func (c *Chain) GetEncoders() []string {
+	names := make([]string, 0, len(availableEncoders))
+	for e := range availableEncoders {
+		names = append(names, e)
+	}
+	return names
+}
+
 //Usage prints the help string for each  configured encoder
 func (c *Chain) Usage() {
 	// Calculate maximum keyword length for nice help formatting
@@ -80,10 +88,7 @@ func (c *Chain) Usage() {
 	format := fmt.Sprintf("  %%-%ds- %%s\n", max_length+2)
 
 	// Sort the encoders alphabetically
-	names := make([]string, 0, len(availableEncoders))
-	for k := range availableEncoders {
-		names = append(names, k)
-	}
+	names := c.GetEncoders()
 	sort.Strings(names)
 
 	for _, n := range names {