Add support for --path option to install

features/install.feature

@@ -2,16 +2,26 @@
 Feature: Install bourbon files
 
   Scenario: Bourbon generates a new bourbon installation
-    When I install bourbon files
+    When I run `bundle exec bourbon install`
     Then the sass directories should have been generated
     And the following directories should exist:
-      | bourbon           |
-      | bourbon/lib       |
+      | bourbon     |
+      | bourbon/lib |
     And the master bourbon partial should have been generated
     And the lib files should have been generated
     And the output should contain "Bourbon files installed to bourbon/"
 
   Scenario: Generating does not overwrite an existing bourbon directory
     Given bourbon is already installed
-    When I install bourbon files
+    When I run `bundle exec bourbon install`
     Then the output should contain "Bourbon files already installed, doing nothing."
+
+  Scenario: Install Bourbon into a custom path
+    When I run `bundle exec bourbon install --path=custom_path`
+    Then the sass directories with "custom_path" prefix should have been generated
+    And the following directories should exist:
+      | custom_path/bourbon     |
+      | custom_path/bourbon/lib |
+    And the master bourbon partial should have been generated within "custom_path" directory
+    And the lib files should have been generated within "custom_path" directory
+    And the output should contain "Bourbon files installed to custom_path/bourbon/"

features/step_definitions/bourbon_steps.rb

@@ -1,33 +1,32 @@
 Given /^bourbon is already installed$/ do
-  set_up_bourbon_directory
   install_bourbon
 end
 
 When /^I install bourbon files$/ do
-  set_up_bourbon_directory
   install_bourbon
 end
 
 When /^I update bourbon files$/ do
   update_bourbon
 end
 
-Then /^the sass directories should have been generated$/ do
-  sass_directories = ["bourbon/addons", "bourbon/css3", "bourbon/functions"]
+Then /^the sass directories(?: with "([^"]+)" prefix)? should have been generated$/ do |prefix|
+  sass_directories = ["addons", "css3", "functions"]
+  sass_directories.map!{ |directory| bourbon_path(prefix, directory) }
   check_directory_presence(sass_directories, true)
 end
 
-Then /^the master bourbon partial should have been generated$/ do
-  check_file_presence(["bourbon/_bourbon.scss"], true)
+Then /^the master bourbon partial should have been generated(?: within "([^"]+)" directory)?$/ do |prefix|
+  check_file_presence([bourbon_path(prefix, '_bourbon.scss')], true)
 end
 
-Then /^the lib files should have been generated$/ do
-  check_file_presence(["bourbon/lib/bourbon.rb"], true)
-  check_directory_presence(["bourbon/lib/bourbon"], true)
-  check_file_presence(["bourbon/lib/bourbon/sass_extensions.rb"], true)
-  check_directory_presence(["bourbon/lib/bourbon/sass_extensions"], true)
+Then /^the lib files should have been generated(?: within "([^"]+)" directory)?$/ do |prefix|
+  check_file_presence([bourbon_path(prefix, 'lib/bourbon.rb')], true)
+  check_directory_presence([bourbon_path(prefix, 'lib/bourbon')], true)
+  check_file_presence([bourbon_path(prefix, 'lib/bourbon/sass_extensions.rb')], true)
+  check_directory_presence([bourbon_path(prefix, 'lib/bourbon/sass_extensions')], true)
 end
 
 Then /^bourbon should not have been generated$/ do
-  check_directory_presence(["bourbon"], false)
+  check_directory_presence(['bourbon'], false)
 end

features/support/bourbon_support.rb

@@ -1,16 +1,19 @@
 module BourbonSupport
-  def set_up_bourbon_directory
-    write_file("Gemfile", "gem 'bourbon', :path => '../../..'")
-    run_simple("bundle install")
-  end
-
   def install_bourbon
     run_simple("bundle exec bourbon install")
   end
 
   def update_bourbon
     run_simple("bundle exec bourbon update")
   end
+
+  def bourbon_path(prefix, path)
+    if prefix
+      File.join(prefix, 'bourbon', path)
+    else
+      File.join('bourbon', path)
+    end
+  end
 end
 
 World(BourbonSupport)

lib/bourbon/generator.rb

@@ -4,12 +4,13 @@
 module Bourbon
   class Generator < Thor
     desc 'install', 'Install Bourbon into your project'
+    method_options :path => :string
     def install
       if bourbon_files_already_exist?
         puts "Bourbon files already installed, doing nothing."
       else
         install_files
-        puts "Bourbon files installed to bourbon/"
+        puts "Bourbon files installed to #{install_path}/"
       end
     end
 
@@ -27,7 +28,15 @@ def update
     private
 
     def bourbon_files_already_exist?
-      File.directory?("bourbon")
+      install_path.exist?
+    end
+
+    def install_path
+      @install_path ||= if options[:path]
+          Pathname.new(File.join(options[:path], 'bourbon'))
+        else
+          Pathname.new('bourbon')
+        end
     end
 
     def install_files
@@ -41,17 +50,17 @@ def remove_bourbon_directory
     end
 
     def make_lib_directory
-      FileUtils.mkdir_p("bourbon/lib/bourbon")
+      FileUtils.mkdir_p(install_path.join('lib', 'bourbon'))
     end
 
     def copy_in_sass_extensions
-      FileUtils.cp(File.join(lib_directory, "bourbon.rb"), "bourbon/lib/")
-      FileUtils.cp(File.join(lib_bourbon_directory, "sass_extensions.rb"), "bourbon/lib/bourbon/")
-      FileUtils.cp_r(File.join(lib_bourbon_directory, "sass_extensions"), "bourbon/lib/bourbon/")
+      FileUtils.cp(File.join(lib_directory, "bourbon.rb"), install_path.join('lib'))
+      FileUtils.cp(File.join(lib_bourbon_directory, "sass_extensions.rb"), install_path.join('lib', 'bourbon'))
+      FileUtils.cp_r(File.join(lib_bourbon_directory, "sass_extensions"), install_path.join('lib', 'bourbon'))
     end
 
     def copy_in_scss_files
-      FileUtils.cp_r(all_stylesheets, "bourbon/")
+      FileUtils.cp_r(all_stylesheets, install_path)
     end
 
     def all_stylesheets