Added --host support

- For when you need to change the ip address.
- Added Tests
- Updated README

README.md

@@ -17,6 +17,7 @@ Options
 -------
 
 * `:port` is the port number to run on (default `9292`)
+* `:host` is the host ip address to run on (default `0.0.0.0`)
 * `:environment` is the environment to use (default `development`)
 * `:start_on_start` will start the server when starting Guard (default `true`)
 * `:force_run` kills any process that's holding open the listen port before attempting to (re)start Rack (default `false`).

lib/guard/rack.rb

@@ -9,6 +9,7 @@ class Rack < ::Guard::Plugin
 
     DEFAULT_OPTIONS = {
       port: 9292,
+      host: '0.0.0.0',
       environment: 'development',
       start_on_start: true,
       force_run: false,

lib/guard/rack/runner.rb

@@ -41,7 +41,8 @@ def build_rack_command
       command.push(
         options[:config],
         '--env', options[:environment].to_s,
-        '--port', options[:port].to_s
+        '--port', options[:port].to_s,
+        '--host', options[:host].to_s
       )
 
       command << '--daemonize' if options[:daemon]

spec/lib/guard/runner_spec.rb

@@ -6,7 +6,7 @@
   let(:environment) { 'development' }
   let(:port) { 3000 }
 
-  let(:default_options) { { environment: environment, port: port, config: 'config.ru' } }
+  let(:default_options) { { environment: environment, port: port, config: 'config.ru', host: '0.0.0.0' } }
   let(:options) { default_options }
 
   before do
@@ -83,6 +83,22 @@
         end
       end
     end
+
+    context 'host' do
+      context 'default' do
+        it 'should default to 0.0.0.0' do
+          expect(runner.send(:build_rack_command)).to include('0.0.0.0')
+        end
+      end
+
+      context 'custom' do
+        let(:options) { default_options.merge(host: '127.0.0.0') }
+        it 'should honour config option' do
+          default_options.merge(host: '127.0.0.0')
+          expect(runner.send(:build_rack_command)).to include('127.0.0.0')
+        end
+      end
+    end
   end
 
   describe '#start' do