Implement middleware and version commands in the rage/cli.rb file.

lib/rage/cli.rb

@@ -2,6 +2,7 @@
 
 require "thor"
 require "rack"
+require "rage/version"
 
 module Rage
   class CLI < Thor
@@ -112,6 +113,29 @@ def console
       IRB.start
     end
 
+    desc "middleware", "List Rack middleware stack enabled for the application"
+    def middleware
+      app = ::Rack::Builder.parse_file(options[:config] || "config.ru")
+      app = app[0] if app.is_a?(Array)
+      middlewares = []
+
+      while app
+        if app.instance_variable_defined?(:@app)
+          middlewares << app.class
+          app = app.instance_variable_get(:@app)
+        else
+          break
+        end
+      end
+
+      middlewares.each { |middleware| puts middleware }
+    end
+
+    desc "version", "Return the current version of the framework"
+    def version
+      puts Rage::VERSION
+    end
+
     private
 
     def environment

spec/rage/cli_spec.rb

@@ -0,0 +1,46 @@
+require "rage/cli"
+
+RSpec.describe Rage::CLI do
+  subject(:rage_cli) { described_class.new }
+
+  describe "#middleware" do
+    let(:config_ru) { "spec/rspec/config.ru" }
+
+    before do
+      allow(rage_cli).to receive(:options).and_return(config: config_ru)
+      allow(Rack::Builder).to receive(:parse_file).with(config_ru).and_return([app])
+    end
+
+    context "when middleware stack is present" do
+      let(:app) do
+        Rack::Builder.app do
+          use Rage::FiberWrapper
+          use Rage::Reloader
+          run ->(env) { [200, { "Content-Type" => "text/plain" }, ["OK"]] }
+        end
+      end
+
+      it "lists the middleware stack" do
+        expect { rage_cli.middleware }.to output(/Rage::FiberWrapper\nRage::Reloader/).to_stdout
+      end
+    end
+
+    context "when middleware stack is empty" do
+      let(:app) { ->(env) { [200, { "Content-Type" => "text/plain" }, ["OK"]] } }
+
+      it "does not list any middleware" do
+        expect { rage_cli.middleware }.to output("").to_stdout
+      end
+    end
+  end
+
+  describe "#version" do
+    before do
+      stub_const("Rage::VERSION", "1.0.0")
+    end
+
+    it "returns the current version of the framework" do
+      expect { rage_cli.version }.to output("1.0.0\n").to_stdout
+    end
+  end
+end