<script language="JavaScript">
<!--
function _AN_global_var_init(){
	_AN_this_url = "/prx/000/";
	_AN_base_scheme = "https";
	_AN_base_host = "https://patch-diff.githubusercontent.com";
	_AN_base_path = "https://patch-diff.githubusercontent.com/raw/mudbugmedia/critical-path-css-rails/pull/";
	_AN_encode_urls = 0;
	_AN_mpo = 1;
	_AN_md = 0;
	_AN_rel_urls = 0;
	_AN_nav_switch = 0;
	_AN_nav_allowurl = 1;
	_AN_nav_override = 0;
	_AN_has_iframe = 0;
	_AN_dbg_flags = null;
	_AN_nav_use_aaa = 1;
	_AN_expires_pass = 0;
	_AN_wrap_evthandlers = 0;
	_AN_rewrite_param_exact = 0;
	_AN_obj_params = {};
} 
_AN_global_var_init();
//-->
</script>
<script language="JavaScript" src="/prx/001/http/localh/an_util.js"></script>
<script language="JavaScript" src="/prx/001/http/localh/NSLib.js"></script>

From 6fdc6676d1f70678e65076b34cf0563f2864c620 Mon Sep 17 00:00:00 2001
From: Michael Misshore <michael@mudbugmedia.com>
Date: Thu, 1 Oct 2015 20:38:06 -0500
Subject: [PATCH 1/5] Move configurations into their own class, read from a
 YAML file

---
 .rubocop_todo.yml                      |  4 ++--
 lib/critical_path_css/configuration.rb | 23 +++++++++++++++++++++++
 lib/critical_path_css_rails.rb         | 10 ++++++----
 lib/tasks/critical_path_css.rake       |  9 ++-------
 4 files changed, 33 insertions(+), 13 deletions(-)
 create mode 100644 lib/critical_path_css/configuration.rb

diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 136289d..3911bed 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2015-09-19 12:37:55 -0500 using RuboCop version 0.34.1.
+# on 2015-10-01 20:43:37 -0500 using RuboCop version 0.34.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -9,4 +9,4 @@
 # Offense count: 2
 # Configuration parameters: AllowURI, URISchemes.
 Metrics/LineLength:
-  Max: 91
\ No newline at end of file
+  Max: 90
diff --git a/lib/critical_path_css/configuration.rb b/lib/critical_path_css/configuration.rb
new file mode 100644
index 0000000..e13829e
--- /dev/null
+++ b/lib/critical_path_css/configuration.rb
@@ -0,0 +1,23 @@
+module CriticalPathCss
+  class Configuration
+    CONFIGURATION_FILENAME = 'critical_path_css.yml'
+
+    def initialize
+      @configurations = YAML.load_file(configuration_file_path)[Rails.env]
+    end
+
+    def routes
+      @routes ||= @configurations['routes']
+    end
+
+    def base_url
+      @base_url ||= @configurations['base_url']
+    end
+
+    private
+
+    def configuration_file_path
+      Rails.root.join('config', CONFIGURATION_FILENAME)
+    end
+  end
+end
diff --git a/lib/critical_path_css_rails.rb b/lib/critical_path_css_rails.rb
index 592c0dc..71b2d6d 100644
--- a/lib/critical_path_css_rails.rb
+++ b/lib/critical_path_css_rails.rb
@@ -2,13 +2,15 @@ module CriticalPathCss
   require 'phantomjs'
 
   CACHE_NAMESPACE = 'critical-path-css'
-  PENTHOUSE_PATH = "#{File.dirname(__FILE__)}/penthouse/penthouse.js"
+  PENTHOUSE_PATH  = "#{File.dirname(__FILE__)}/penthouse/penthouse.js"
 
-  def self.generate(main_css_path, base_url, routes)
+  def self.generate(main_css_path)
     full_main_css_path = "#{Rails.root}/public#{main_css_path}"
+    config = CriticalPathCss::Configuration.new(Rails.root, Rails.env)
+
+    config.routes.each do |route|
+      css = Phantomjs.run(PENTHOUSE_PATH, config.base_url + route, full_main_css_path)
 
-    routes.each do |route|
-      css = Phantomjs.run(PENTHOUSE_PATH, base_url + route, full_main_css_path)
       Rails.cache.write(route, css, namespace: CACHE_NAMESPACE)
     end
   end
diff --git a/lib/tasks/critical_path_css.rake b/lib/tasks/critical_path_css.rake
index 9b5c1ab..06042e8 100644
--- a/lib/tasks/critical_path_css.rake
+++ b/lib/tasks/critical_path_css.rake
@@ -1,15 +1,10 @@
 require 'critical_path_css_rails'
 
 namespace :critical_path_css do
-  @base_url = Rails.env.production? ? 'http://example.com' : 'http://localhost:3000'
-  @routes = %w(
-    /
-  )
-
   desc 'Generate critical CSS for the routes defined'
   task generate: :environment do
-    @main_css_path = ActionController::Base.helpers.stylesheet_path('application.css').to_s
+    main_css_path = ActionController::Base.helpers.stylesheet_path('application.css').to_s
 
-    CriticalPathCss.generate(@main_css_path, @base_url, @routes)
+    CriticalPathCss.generate(main_css_path)
   end
 end

From ab0a3e396e52e591e56f8d63a6cdea3e159bc328 Mon Sep 17 00:00:00 2001
From: Michael Misshore <michael@mudbugmedia.com>
Date: Thu, 1 Oct 2015 20:42:38 -0500
Subject: [PATCH 2/5] Generate configuration yaml file through the install
 generator

---
 lib/config/critical_path_css.yml                  | 15 +++++++++++++++
 .../critical_path_css/install_generator.rb        |  6 ++++++
 2 files changed, 21 insertions(+)
 create mode 100644 lib/config/critical_path_css.yml

diff --git a/lib/config/critical_path_css.yml b/lib/config/critical_path_css.yml
new file mode 100644
index 0000000..798d14a
--- /dev/null
+++ b/lib/config/critical_path_css.yml
@@ -0,0 +1,15 @@
+defaults: &defaults
+  routes:
+    - /
+
+development:
+  <<: *defaults
+  base_url: http://localhost:3000
+
+staging:
+  <<: *defaults
+  base_url: http://staging.example.com
+
+production:
+  <<: *defaults
+  base_url: http://example.com
diff --git a/lib/generators/critical_path_css/install_generator.rb b/lib/generators/critical_path_css/install_generator.rb
index 7a24f3e..b7c221a 100644
--- a/lib/generators/critical_path_css/install_generator.rb
+++ b/lib/generators/critical_path_css/install_generator.rb
@@ -9,5 +9,11 @@ def copy_rake_task
       task_filename = 'critical_path_css.rake'
       copy_file "../../tasks/#{task_filename}", "lib/tasks/#{task_filename}"
     end
+
+    # Copy the needed configuration YAML file for generating critical CSS
+    def copy_config_file
+      task_filename = 'critical_path_css.yml'
+      copy_file "../../config/#{task_filename}", "config/#{task_filename}"
+    end
   end
 end

From d3a07c588357ea57c6de1001f8bbe1bdb552e64d Mon Sep 17 00:00:00 2001
From: Michael Misshore <michael@mudbugmedia.com>
Date: Thu, 1 Oct 2015 20:55:57 -0500
Subject: [PATCH 3/5] Add CssFetcher

---
 .rubocop_todo.yml                    |  4 ++--
 lib/critical_path_css/css_fetcher.rb | 23 +++++++++++++++++++++++
 lib/critical_path_css_rails.rb       | 12 +++---------
 3 files changed, 28 insertions(+), 11 deletions(-)
 create mode 100644 lib/critical_path_css/css_fetcher.rb

diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 3911bed..ecd179c 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,12 +1,12 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2015-10-01 20:43:37 -0500 using RuboCop version 0.34.1.
+# on 2015-10-03 13:02:27 -0500 using RuboCop version 0.34.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 2
+# Offense count: 1
 # Configuration parameters: AllowURI, URISchemes.
 Metrics/LineLength:
   Max: 90
diff --git a/lib/critical_path_css/css_fetcher.rb b/lib/critical_path_css/css_fetcher.rb
new file mode 100644
index 0000000..881fb46
--- /dev/null
+++ b/lib/critical_path_css/css_fetcher.rb
@@ -0,0 +1,23 @@
+module CriticalPathCss
+  class CssFetcher
+    require 'phantomjs'
+    require 'critical_path_css/configuration'
+
+    PENTHOUSE_PATH = "#{File.dirname(__FILE__)}/../penthouse/penthouse.js"
+
+    def initialize(main_css_relative_path)
+      @main_css_path = "#{Rails.root}/public#{main_css_relative_path}"
+      @config = Configuration.new
+    end
+
+    def fetch
+      @config.routes.map { |route| [route, css_for_route(route)] }.to_h
+    end
+
+    private
+
+    def css_for_route(route)
+      Phantomjs.run(PENTHOUSE_PATH, @config.base_url + route, @main_css_path)
+    end
+  end
+end
diff --git a/lib/critical_path_css_rails.rb b/lib/critical_path_css_rails.rb
index 71b2d6d..a740ba3 100644
--- a/lib/critical_path_css_rails.rb
+++ b/lib/critical_path_css_rails.rb
@@ -1,16 +1,10 @@
 module CriticalPathCss
-  require 'phantomjs'
+  require 'critical_path_css/css_fetcher'
 
   CACHE_NAMESPACE = 'critical-path-css'
-  PENTHOUSE_PATH  = "#{File.dirname(__FILE__)}/penthouse/penthouse.js"
-
-  def self.generate(main_css_path)
-    full_main_css_path = "#{Rails.root}/public#{main_css_path}"
-    config = CriticalPathCss::Configuration.new(Rails.root, Rails.env)
-
-    config.routes.each do |route|
-      css = Phantomjs.run(PENTHOUSE_PATH, config.base_url + route, full_main_css_path)
 
+  def self.generate(main_css_relative_path)
+    CssFetcher.new(main_css_relative_path).fetch.each do |route, css|
       Rails.cache.write(route, css, namespace: CACHE_NAMESPACE)
     end
   end

From 1ae333ae6c9aadbc0cdb6338a1cb046eab0f0805 Mon Sep 17 00:00:00 2001
From: Michael Misshore <michael@mudbugmedia.com>
Date: Sat, 3 Oct 2015 13:34:54 -0500
Subject: [PATCH 4/5] Move CSS file path into the YAML config as well

---
 .rubocop_todo.yml                      |  6 +++---
 lib/config/critical_path_css.yml       |  4 ++++
 lib/critical_path_css/configuration.rb | 25 ++++++++++++++++++++-----
 lib/critical_path_css/css_fetcher.rb   |  5 ++---
 lib/critical_path_css_rails.rb         |  4 ++--
 lib/tasks/critical_path_css.rake       |  4 +---
 6 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index ecd179c..00d139e 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,12 +1,12 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2015-10-03 13:02:27 -0500 using RuboCop version 0.34.1.
+# on 2015-10-03 13:56:01 -0500 using RuboCop version 0.34.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 1
+# Offense count: 2
 # Configuration parameters: AllowURI, URISchemes.
 Metrics/LineLength:
-  Max: 90
+  Max: 86
diff --git a/lib/config/critical_path_css.yml b/lib/config/critical_path_css.yml
index 798d14a..e916570 100644
--- a/lib/config/critical_path_css.yml
+++ b/lib/config/critical_path_css.yml
@@ -1,4 +1,8 @@
 defaults: &defaults
+  # If using the asset pipeline, provide the manifest name
+  manifest_name: application
+  # Else provide the relative path of your CSS file from the /public directory
+  # css_path: /path/to/css/from/public/main.css
   routes:
     - /
 
diff --git a/lib/critical_path_css/configuration.rb b/lib/critical_path_css/configuration.rb
index e13829e..4d6d7e0 100644
--- a/lib/critical_path_css/configuration.rb
+++ b/lib/critical_path_css/configuration.rb
@@ -6,18 +6,33 @@ def initialize
       @configurations = YAML.load_file(configuration_file_path)[Rails.env]
     end
 
-    def routes
-      @routes ||= @configurations['routes']
+    def base_url
+      @configurations['base_url']
     end
 
-    def base_url
-      @base_url ||= @configurations['base_url']
+    def css_path
+      @css_path ||= begin
+        relative_path = @configurations['css_path'] || manifest_path
+        "#{Rails.root}/public#{relative_path}"
+      end
+    end
+
+    def manifest_name
+      @configurations['manifest_name']
+    end
+
+    def routes
+      @configurations['routes']
     end
 
     private
 
     def configuration_file_path
-      Rails.root.join('config', CONFIGURATION_FILENAME)
+      @configuration_file_path ||= Rails.root.join('config', CONFIGURATION_FILENAME)
+    end
+
+    def manifest_path
+      @manifest_path ||= ActionController::Base.helpers.stylesheet_path(manifest_name)
     end
   end
 end
diff --git a/lib/critical_path_css/css_fetcher.rb b/lib/critical_path_css/css_fetcher.rb
index 881fb46..3397819 100644
--- a/lib/critical_path_css/css_fetcher.rb
+++ b/lib/critical_path_css/css_fetcher.rb
@@ -5,8 +5,7 @@ class CssFetcher
 
     PENTHOUSE_PATH = "#{File.dirname(__FILE__)}/../penthouse/penthouse.js"
 
-    def initialize(main_css_relative_path)
-      @main_css_path = "#{Rails.root}/public#{main_css_relative_path}"
+    def initialize
       @config = Configuration.new
     end
 
@@ -17,7 +16,7 @@ def fetch
     private
 
     def css_for_route(route)
-      Phantomjs.run(PENTHOUSE_PATH, @config.base_url + route, @main_css_path)
+      Phantomjs.run(PENTHOUSE_PATH, @config.base_url + route, @config.css_path)
     end
   end
 end
diff --git a/lib/critical_path_css_rails.rb b/lib/critical_path_css_rails.rb
index a740ba3..4e8bbaf 100644
--- a/lib/critical_path_css_rails.rb
+++ b/lib/critical_path_css_rails.rb
@@ -3,8 +3,8 @@ module CriticalPathCss
 
   CACHE_NAMESPACE = 'critical-path-css'
 
-  def self.generate(main_css_relative_path)
-    CssFetcher.new(main_css_relative_path).fetch.each do |route, css|
+  def self.generate
+    CssFetcher.new.fetch.each do |route, css|
       Rails.cache.write(route, css, namespace: CACHE_NAMESPACE)
     end
   end
diff --git a/lib/tasks/critical_path_css.rake b/lib/tasks/critical_path_css.rake
index 06042e8..7f97a67 100644
--- a/lib/tasks/critical_path_css.rake
+++ b/lib/tasks/critical_path_css.rake
@@ -3,8 +3,6 @@ require 'critical_path_css_rails'
 namespace :critical_path_css do
   desc 'Generate critical CSS for the routes defined'
   task generate: :environment do
-    main_css_path = ActionController::Base.helpers.stylesheet_path('application.css').to_s
-
-    CriticalPathCss.generate(main_css_path)
+    CriticalPathCss.generate
   end
 end

From 3ff432803d298f81291059558707348acc569ba7 Mon Sep 17 00:00:00 2001
From: Michael Misshore <michael@mudbugmedia.com>
Date: Sat, 3 Oct 2015 13:59:01 -0500
Subject: [PATCH 5/5] Increment version and update README

---
 README.md                              | 20 +++++++++++---------
 lib/critical_path_css/rails/version.rb |  2 +-
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/README.md b/README.md
index a61db37..b545707 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ This gem uses [PhantomJS](https://github.com/colszowka/phantomjs-gem) and [Penth
 Add `critical-path-css-rails` to your Gemfile:
 
 ```
-gem 'critical-path-css-rails', '~> 0.1.0'
+gem 'critical-path-css-rails', '~> 0.2.0'
 ```
 
 Download and install by running:
@@ -23,24 +23,26 @@ Download and install by running:
 bundle install
 ```
 
-Create the rake task that will generate your critical CSS
+Run the generator to install the rake task and configuration file:
 
 ```
 rails generator critical_path_css:install
 ```
 
-This adds the following file:
+The generator adds the following files:
 
+* `config/critical_path_css.yml`
 * `lib/tasks/critical_path_css.rake`
 
 
 ## Usage
 
-First, you'll need to configue a few variables in the rake task: `lib/tasks/critical_path_css.rake`
+First, you'll need to configue a few things in the YAML file: `config/critical_path_css.yml`
 
-* `@base_url`: Change the url's here to match your Production and Development base URL, respectively.
-* `@routes`: List the routes that you would like to generate the critical CSS for. (i.e. /resources, /resources/show/1, etc.)
-* `@main_css_path`: Inside of the generate task, you'll need to define the path to the application's main CSS. The gem assumes your CSS lives in `RAILS_ROOT/public`. If your main CSS file is in `RAILS_ROOT/public/assets/main.css`, you would set the variable to `/assets/main.css`.
+* `manifest_name`: If you're using the asset pipeline, add the manifest name.
+* `css_path`: If you're not using the asset pipeline, you'll need to define the path to the application's main CSS. The gem assumes your CSS lives in `RAILS_ROOT/public`. If your main CSS file is in `RAILS_ROOT/public/assets/main.css`, you would set the variable to `/assets/main.css`.
+* `routes`: List the routes that you would like to generate the critical CSS for. (i.e. /resources, /resources/show/1, etc.)
+* `base_url`: Add your application's URL for the necessary environments.
 
 
 Before generating the CSS, ensure that your application is running (viewable from a browser) and the main CSS file exists. Then in a separate tab, run the rake task to generate the critical CSS.
@@ -57,7 +59,7 @@ rake critical_path_css:generate
 
 To load the generated critical CSS into your layout, in the head tag, insert:
 
-```html
+```HTML+ERB
 <style>

   <%= CriticalPathCss.fetch(request.path) %>
 </style>
@@ -65,7 +67,7 @@ To load the generated critical CSS into your layout, in the head tag, insert:
 
 A simple example using loadcss-rails looks like:
 
-```html
+```HTML+ERB
 <style>

     <%= CriticalPathCss.fetch(request.path) %>
 </style>
diff --git a/lib/critical_path_css/rails/version.rb b/lib/critical_path_css/rails/version.rb
index 26c3a83..0cf9675 100644
--- a/lib/critical_path_css/rails/version.rb
+++ b/lib/critical_path_css/rails/version.rb
@@ -1,6 +1,6 @@
 module CriticalPathCSS
   module Rails
-    VERSION = '0.1.0'
+    VERSION = '0.2.0'
     PENTHOUSE_VERSION = '0.3.4'
   end
 end
