Improve rake task report on failure

features/raketask.feature

@@ -0,0 +1,50 @@
+Feature: Raketask
+  In order to use cucumber's rake task
+  As a Cuker
+  I do not want to see rake's backtraces when it fails
+  Also I want to get zero exit status code on failures
+  And non-zero exit status code when is pases
+
+  Background:
+    Given a file named "features/passing_and_failing.feature" with:
+      """
+      Feature: Sample
+
+        Scenario: Passing
+          Given passing
+
+        Scenario: Failing
+          Given failing
+      """
+    Given a file named "features/step_definitions/steps.rb" with:
+      """
+      Given(/^passing$/) do
+      end
+
+      Given /^failing$/ do
+        raise "FAIL"
+      end
+      """
+    Given a file named "Rakefile" with:
+      """
+        require 'cucumber/rake/task'
+
+        SAMPLE_FEATURE_FILE = 'features/passing_and_failing.feature'
+
+        Cucumber::Rake::Task.new(:pass) do |t|
+          t.cucumber_opts = "#{SAMPLE_FEATURE_FILE}:3"
+        end
+
+        Cucumber::Rake::Task.new(:fail) do |t|
+          t.cucumber_opts = "#{SAMPLE_FEATURE_FILE}:6"
+        end
+      """
+
+  Scenario: Passing feature
+    When I run `bundle exec rake pass`
+    Then the exit status should be 0
+
+  Scenario: Failing feature
+    When I run `bundle exec rake fail`
+    Then the exit status should not be 0
+    And the output should not contain "rake aborted!"

lib/cucumber/rake/task.rb

@@ -101,7 +101,11 @@ def cmd
         end
 
         def run
-          sh(cmd.join(" "))
+          sh cmd.join(" ") do |ok, res|
+            if !ok
+              exit res.exitstatus
+            end
+          end
         end
       end