this works as `middleman deploy`

lib/middleman-deploy.rb

@@ -1,5 +1,7 @@
 require "middleman-core"
 
+require "middleman-deploy/commands"
+
 ::Middleman::Extensions.register(:deploy) do
   require "middleman-deploy/extension"
   ::Middleman::Deploy

lib/middleman-deploy/commands.rb

@@ -1 +1,36 @@
 require "middleman-core/cli"
+
+require "middleman-deploy/extension"
+
+module Middleman
+  module Cli
+    # This class provides a "deploy" command for the middleman CLI.
+    class Deploy < Thor
+      include Thor::Actions
+
+      check_unknown_options!
+
+      namespace :deploy
+
+      # Tell Thor to exit with a nonzero exit code on failure
+      def self.exit_on_failure?
+        true
+      end
+
+      desc "deploy", "Deploy to a remote host over rsync"
+      def deploy
+        shared_instance = ::Middleman::Application.server.inst
+
+        # This only exists when the config.rb sets it!
+        if shared_instance.respond_to? :deploy
+          shared_instance.deploy(self)
+        else
+          raise Thor::Error.new "You need to activate the deploy extension in config.rb "
+        end
+      end
+    end
+
+    # Alias "d" to "deploy"
+    Base.map({ "d" => "deploy" })
+  end
+end

lib/middleman-deploy/extension.rb

@@ -7,7 +7,9 @@ module Middleman
     class Options < Struct.new(:delete, :host, :port, :user, :path); end
 
     class << self
-
+      def options
+        @@options
+      end
       def registered(app, options_hash={}, &block)
         options = Options.new(options_hash)
         yield options if block_given?
@@ -15,6 +17,10 @@ module Middleman
         options.delete ||= false
         options.port ||= 22
 
+        @@options = options
+
+        app.send :include, Helpers
+
         app.after_configuration do
           if (!options.host || !options.user || !options.path)
             raise <<EOF
@@ -32,13 +38,16 @@ end
 EOF
           end
         end
-
-        app.after_build do |builder|
-          builder.run "rsync -avze '" + "ssh -p #{options.port}" + "' #{"--delete" if options.delete == true} build/ #{options.user}@#{options.host}:#{options.path}"
-        end
       end
       alias :included :registered
     end
 
+    module Helpers
+      def deploy(builder)
+        options = ::Middleman::Deploy.options
+        builder.run "rsync -avze '" + "ssh -p #{options.port}" + "' #{"--delete" if options.delete == true} build/ #{options.user}@#{options.host}:#{options.path}"
+      end
+    end
+
   end
 end