Add common tools

scripts/helpers/arch.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# shellcheck disable=SC2034
+# Line above disables shellcheck linters:
+#   * SC2043 - unused variable (this file sourced elsewhere).
+
+base_arch=$(uname -m)
+arch=""
+
+if [ "$base_arch" = "x86_64" ]; then
+        arch=amd64
+elif [ "$base_arch" = "aarch64" ]; then
+        arch=arm64
+else
+        echo "unknown arch"
+        exit 1
+fi