feat(list.go): added list packages

client.go

@@ -31,6 +31,12 @@ func client(conn net.Conn, instance string) error {
 				log.Println(err)
 				return err
 			}
+		case "list":
+			err = list(conn, instance)
+			if err != nil {
+				log.Println(err)
+				return err
+			}
 		default:
 			err = errors.New("Unknown Command: " + val)
 			log.Println(err)

list.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net"
+	"os"
+	"path/filepath"
+)
+
+func list(conn net.Conn, instance string) error {
+
+	package_list := make(map[string]string)
+
+	packages_path, err := filepath.Abs(filepath.Join(instance, "apps"))
+	if err != nil {
+		return err
+	}
+
+	packages, err := os.ReadDir(packages_path)
+	if err != nil {
+		return err
+	}
+
+	for _, program := range packages {
+		if program.Type().IsDir() {
+			info_path, err := filepath.Abs(filepath.Join(packages_path, program.Name(), "boundaries.json"))
+			if err != nil {
+				log.Println(err)
+				continue
+			}
+			if exists, err := exists(info_path); exists && err == nil {
+				infofile_content, err := os.ReadFile(info_path)
+				if err != nil {
+					log.Println(err)
+					continue
+				}
+				var info map[string]interface{}
+				err = json.Unmarshal(infofile_content, &info)
+				if err != nil {
+					log.Println(err)
+					continue
+				}
+
+				version, has := info["version"]
+				if !has {
+					version = "1.0"
+				}
+				package_list[program.Name()] = version.(string)
+			}
+		}
+	}
+
+	data, err := json.Marshal(package_list)
+	if err != nil {
+		return err
+	}
+
+	conn.Write(data)
+
+	return nil
+}