crowbar/crowbar-hyperv

# Try to include from core chef, if error then monkey patch it in.

begin
  include Chef::Mixin::WindowsArchitectureHelper
rescue
  Chef::Log.debug("Chef::Mixin::WindowsArchitectureHelper not in core version, Monkey patching in.")

  require "chef/exceptions"
  require "win32/api" if Chef::Platform.windows?

  class Chef
    module Mixin
      module WindowsArchitectureHelper

        def node_windows_architecture(node)
          node[:kernel][:machine].to_sym
        end

        def wow64_architecture_override_required?(node, desired_architecture)
          is_i386_windows_process? &&
            node_windows_architecture(node) == :x86_64 &&
            desired_architecture == :x86_64
        end

        def node_supports_windows_architecture?(node, desired_architecture)
          assert_valid_windows_architecture!(desired_architecture)
          return (node_windows_architecture(node) == :x86_64 ||
            desired_architecture == :i386) ? true : false
        end

        def valid_windows_architecture?(architecture)
          return (architecture == :x86_64) || (architecture == :i386)
        end

        def assert_valid_windows_architecture!(architecture)
          if ! valid_windows_architecture?(architecture)
            raise Chef::Exceptions::Win32ArchitectureIncorrect,
                  "The specified architecture was not valid. It must be one of :i386 or :x86_64"
          end
        end

        def is_i386_windows_process?
          Chef::Platform.windows? && "X86".casecmp(ENV["PROCESSOR_ARCHITECTURE"]) == 0
        end

        def disable_wow64_file_redirection(node)
          original_redirection_state = ["0"].pack("P")

          if ((node_windows_architecture(node) == :x86_64) && ::Chef::Platform.windows?)
            win32_wow_64_disable_wow_64_fs_redirection =
              ::Win32::API.new("Wow64DisableWow64FsRedirection", "P", "L", "kernel32")

            succeeded = win32_wow_64_disable_wow_64_fs_redirection.call(original_redirection_state)

            if succeeded == 0
              raise Win32APIError "Failed to disable Wow64 file redirection"
            end

          end

          original_redirection_state
        end

        def restore_wow64_file_redirection(node, original_redirection_state)
          if ( (node_windows_architecture(node) == :x86_64) && ::Chef::Platform.windows?)
            win32_wow_64_revert_wow_64_fs_redirection =
              ::Win32::API.new("Wow64RevertWow64FsRedirection", "P", "L", "kernel32")

            succeeded = win32_wow_64_revert_wow_64_fs_redirection.call(original_redirection_state)

            if succeeded == 0
              raise Win32APIError "Failed to revert Wow64 file redirection"
            end
          end
        end
      end
    end
  end
end

# Making sure this library is available to Chef::Mixin::PowershellOut
# Required for clients that don't have Chef::Mixin::WindowsArchitectureHelper in
# core chef.
Chef::Mixin::PowershellOut.send(:include, Chef::Mixin::WindowsArchitectureHelper)