Optimize the handling of custom input parameters

Author: ophub

remake

@@ -179,30 +179,33 @@ init_var() {
     echo -e "${STEPS} Start Initializing Variables..."
 
     # If it is followed by [ : ], it means that the option requires a parameter value
-    get_all_ver="$(getopt "b:r:u:k:a:s:n:" "${@}")"
+    local options="b:r:u:k:a:s:n:"
+    parsed_args=$(getopt -o "${options}" -- "${@}")
+    [[ ${?} -ne 0 ]] && error_msg "Parameter parsing failed."
+    eval set -- "${parsed_args}"
 
-    while [[ -n "${1}" ]]; do
+    while true; do
         case "${1}" in
         -b | --Board)
             if [[ -n "${2}" ]]; then
                 make_board="${2// /}"
-                shift
+                shift 2
             else
                 error_msg "Invalid -b parameter [ ${2} ]!"
             fi
             ;;
         -r | --kernelRepository)
             if [[ -n "${2}" ]]; then
                 kernel_repo="${2}"
-                shift
+                shift 2
             else
                 error_msg "Invalid -r parameter [ ${2} ]!"
             fi
             ;;
         -u | --kernelUsage)
             if [[ -n "${2}" ]]; then
                 kernel_usage="${2//kernel_/}"
-                shift
+                shift 2
             else
                 error_msg "Invalid -u parameter [ ${2} ]!"
             fi
@@ -217,40 +220,44 @@ init_var() {
                 beta_kernel=(${2})
                 specific_kernel=(${2})
                 IFS="${oldIFS}"
-                shift
+                shift 2
             else
                 error_msg "Invalid -k parameter [ ${2} ]!"
             fi
             ;;
         -a | --Autokernel)
             if [[ -n "${2}" ]]; then
                 auto_kernel="${2}"
-                shift
+                shift 2
             else
                 error_msg "Invalid -a parameter [ ${2} ]!"
             fi
             ;;
         -s | --Size)
             if [[ -n "${2}" ]]; then
                 img_mb="${2}"
-                shift
+                shift 2
             else
                 error_msg "Invalid -s parameter [ ${2} ]!"
             fi
             ;;
         -n | --BuilderName)
             if [[ -n "${2}" ]]; then
                 builder_name="${2// /}"
-                shift
+                shift 2
             else
                 error_msg "Invalid -n parameter [ ${2} ]!"
             fi
             ;;
+        --)
+            shift
+            break
+            ;;
         *)
-            error_msg "Invalid option [ ${1} ]!"
+            [[ -n "${1}" ]] && error_msg "Invalid option [ ${1} ]!"
+            break
             ;;
         esac
-        shift
     done
 
     # Set the image size, such as [ -s 512/2560 ] or [ -s 2560 ]