scripts: whiptail migration menu

scripts/ui/migration_menu.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+migration_menu(){
+	local menu_options=(
+		"1" "Migrate MainsailOS"
+		"2" "Migrate FluiddPi"
+	)
+  local menu_str="This function will help you to migrate a vanilla MainsailOS or FluiddPi image to a newer state.
+Only use this function if you use MainsailOS 0.4.0 or lower, or FluiddPi v1.13.0 or lower.
+Please have a look at the KIAUH changelog for more details on what this function will do."
+
+  while true; do
+    local menu
+    menu=$(whiptail --title "CustomPiOS Migration" --cancel-button "Back" --notags --menu "$menu_str\n\nPerform Action:" \
+      "$KIAUH_WHIPTAIL_NORMAL_HEIGHT" "$KIAUH_WHIPTAIL_NORMAL_WIDTH" 8 "${menu_options[@]}" 3>&1 1>&2 2>&3)
+    local out=$?
+    if [ $out -eq 1 ]; then
+    	break
+    elif [ $out -eq 0 ]; then
+			case "$menu" in
+				1) migrate_custompios "mainsail";;
+      	2) migrate_custompios "fluiddpi";;
+			esac
+		else
+			# Unexpected event, no clue what happened
+			exit 1
+		fi
+  done
+}