dev: add utility script to assist with development (#6)

Co-authored-by: Justin Burr <juburr@users.noreply.github.com>

src/scripts/install_hash.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# Convenience script, not used by directly by the production orb, but
+# for development purposes when adding SHA-512 checksums to the lookup
+# table in install.sh.
+
+set -e
+set +o history
+
+# Fetch CLI arguments
+# Can also be set as environment variables.
+while getopts :v: flag
+do
+    case "${flag}" in
+        v) VERSION=${OPTARG};;
+        *) echo "Invalid option: -${OPTARG}" >&2; exit 1;;
+    esac
+done
+
+# Validate input arguments
+if [[ -z "${VERSION}" ]]; then
+  echo "Must specify a version number."
+  echo "Usage: $0 -v 1.0.0"
+  echo "Alternatively: VERSION=1.0.0 $0"
+  exit 1
+fi
+
+# Download the specified version and get the SHA-512 checksum of
+# the kubescape binary inside. Suppress output for readability; this is
+# dev script, so simply re-enable output if you need to debug anything.
+cd /tmp
+wget "https://github.com/kubescape/kubescape/releases/download/v${VERSION}/kubescape-ubuntu-latest" -O kubescape -q
+CHECKSUM=$(sha512sum /tmp/kubescape | awk '{ print $1 }')
+echo "[\"${VERSION}\"]=\"${CHECKSUM}\""
+rm /tmp/kubescape