add a generator, 'cause i'm both lazy and not lazy

README.md

@@ -24,6 +24,12 @@ Cucumber::StepWriter.after_write do |dir|
 end
 ```
 
+Set up your sane defaults by using the generator:
+
+``` bash
+rails generator cucumber:step_writer
+```
+
 TODO:
 
 * If you want it to generate for different languages, I take pull requests.

lib/cucumber-step_writer.rb

@@ -1 +1,4 @@
 require "cucumber/step_writer"
+
+require "cucumber/step_writer/railtie" if defined?(::Rails)
+

lib/cucumber/step_writer/generators.rb

@@ -0,0 +1,13 @@
+module Cucumber
+  class StepWriterGenerator < Rails::Generators::Base
+    source_root File.expand_path('../../../../skel', __FILE__)
+
+    desc "Create a step writer that opens your step definitiosn folder once steps are generated"
+    def generate_step_writer_after_hook
+      copy_file 'step_writer.rb', 'features/support/step_writer.rb'
+      insert_into_file 'config/cucumber.yml',
+                       "# inserted by cucumber-step_writer\nstd_opts << ' -f Cucumber::StepWriter --out features/step_definitions'\n",
+                       :after => %r{std_opts = "--format[^\n]*\n}
+    end
+  end
+end

lib/cucumber/step_writer/railtie.rb

@@ -0,0 +1,8 @@
+module Cucumber
+  class StepWriterRailtie < Rails::Railtie
+    generators do
+      load File.expand_path('../generators.rb', __FILE__)
+    end
+  end
+end
+

skel/step_writer.rb

@@ -0,0 +1,10 @@
+Cucumber::StepWriter.after_write do |dir|
+  %w{open xdg-open}.each do |cmd|
+    %x{which #{cmd}}
+
+    if $?.exitstatus
+      system %{#{cmd} #{dir}}
+      break
+    end
+  end
+end