Allow bourbon update to take --path argument

features/step_definitions/bourbon_steps.rb

@@ -2,12 +2,7 @@
   install_bourbon
 end
 
-When /^I install bourbon files$/ do
-  install_bourbon
-end
-
-When /^I update bourbon files$/ do
-  update_bourbon
+Given /^I install bourbon to "([^"]*)"$/ do |path|
 end
 
 Then /^the sass directories(?: with "([^"]+)" prefix)? should have been generated$/ do |prefix|

features/support/bourbon_support.rb

@@ -1,10 +1,10 @@
 module BourbonSupport
-  def install_bourbon
-    run_simple("bundle exec bourbon install")
-  end
-
-  def update_bourbon
-    run_simple("bundle exec bourbon update")
+  def install_bourbon(path = nil)
+    if path
+      run_simple("bundle exec bourbon install --path '#{path}'")
+    else
+      run_simple("bundle exec bourbon install")
+    end
   end
 
   def bourbon_path(prefix, path)

features/update.feature

@@ -2,16 +2,29 @@
 Feature: Update bourbon files
 
   Scenario: Updating updates an existing bourbon install
-    When I install bourbon files
-    And I write to "bourbon/_bourbon.scss" with:
+    Given bourbon is already installed
+    When I write to "bourbon/_bourbon.scss" with:
       """
       foobar
       """
-    And I update bourbon files
+    And I run `bundle exec bourbon update`
     Then the output should contain "Bourbon files updated."
     And the file "bourbon/_bourbon.scss" should not contain "foobar"
 
+  Scenario: Updating with a --path option
+    Given I install bourbon to "custom_path"
+    When I write to "custom_path/bourbon/_bourbon.scss" with:
+      """
+      foobar
+      """
+    And I run `bundle exec bourbon update`
+    Then the output should contain "No existing bourbon installation. Doing nothing."
+
+    When I run `bundle exec bourbon update --path custom_path`
+    Then the output should contain "Bourbon files updated."
+    And the file "custom_path/bourbon/_bourbon.scss" should not contain "foobar"
+
   Scenario: Updating does not generate a new bourbon install
-    When I update bourbon files
+    And I run `bundle exec bourbon update`
     Then bourbon should not have been generated
     And the output should contain "No existing bourbon installation. Doing nothing."

lib/bourbon/generator.rb

@@ -17,6 +17,7 @@ def install
     end
 
     desc 'update', 'Update Bourbon'
+    method_options :path => :string
     def update
       if bourbon_files_already_exist?
         remove_bourbon_directory