redirect msfupdate users on Kali

msfupdate

@@ -13,6 +13,8 @@ while File.symlink?(msfbase)
   msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
 end
 
+require 'backports'
+
 class Msfupdate
   attr_reader :stdin
   attr_reader :stdout
@@ -132,12 +134,12 @@ class Msfupdate
     end
 
     Dir.chdir(@msfbase_dir) do
-      if git?
+      if apt?
-        update_git!
+        raise "msfupdate is not supported when Metasploit is part of the operating system. Please use 'apt update; apt install metasploit-framework'"
       elsif binary_install?
         update_binary_install!
-      elsif apt?
+      elsif git?
-        update_apt!
+        update_git!
       else
         raise "Cannot determine checkout type: `#{@msfbase_dir}'"
       end
@@ -267,23 +269,6 @@ class Msfupdate
     end
   end
 
-  def update_apt!
-    # For more information, see here:
-    #   	https://community.rapid7.com/community/metasploit/blog/2013/01/17/metasploit-updates-and-msfupdate
-    stdout.puts "[*] Checking for updates via the APT repository"
-    stdout.puts "[*] Note: expect weekly(ish) updates using this method"
-    system("apt-get", "-qq", "update")
-
-    framework_version = apt_upgrade_available('metasploit-framework')
-
-    if framework_version.blank?
-      stdout.puts "[*] No updates available"
-    else
-      stdout.puts "[*] Updating to version #{framework_version}"
-      system("apt-get", "install", "--assume-yes", "metasploit-framework")
-    end
-  end
-
   # Adding an upstream enables msfupdate to pull updates from
   # Rapid7's metasploit-framework repo instead of the repo
   # the user originally cloned or forked.