metasploit: add passthru.updateScript

pkgs/tools/security/metasploit/default.nix

@@ -1,14 +1,5 @@
 { stdenv, fetchFromGitHub, makeWrapper, ruby, bundlerEnv }:
 
-# Maintainer notes for updating:
-# 1. increment version number in expression and in Gemfile
-# 2. run $ nix-shell --command "bundler install && bundix"
-#    in metasploit in nixpkgs
-# 3. run $ sed -i '/[ ]*dependencies =/d' gemset.nix
-# 4. run $ nix-build -A metasploit ../../../../
-# 5. update sha256sum in expression
-# 6. run step 3 again
-
 let
   env = bundlerEnv {
     inherit ruby;
@@ -45,6 +36,9 @@ in stdenv.mkDerivation rec {
 
   '';
 
+  # run with: nix-shell maintainers/scripts/update.nix --argstr path metasploit
+  passthru.updateScript = ./update.sh;
+
   meta = with stdenv.lib; {
     description = "Metasploit Framework - a collection of exploits";
     homepage = "https://github.com/rapid7/metasploit-framework/wiki";

pkgs/tools/security/metasploit/update.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl bundix git libiconv libpcap libxml2 libxslt pkg-config postgresql ruby.devEnv sqlite xmlstarlet nix-update
+
+set -eu -o pipefail
+cd "$(dirname "$(readlink -f "$0")")"
+
+latest=$(curl https://github.com/rapid7/metasploit-framework/releases.atom | xmlstarlet sel -N atom="http://www.w3.org/2005/Atom" -t -m /atom:feed/atom:entry -v atom:title -n | head -n1)
+echo "Updating metasploit to $latest"
+
+sed -i "s#refs/tags/.*#refs/tags/$latest\"#" Gemfile
+
+bundler install
+bundix
+sed -i '/[ ]*dependencies =/d' gemset.nix
+
+cd "../../../../"
+nix-update metasploit --version "$latest"