Add configuration fallback for paginate, and fix tests.

features/markdown.feature

@@ -17,7 +17,10 @@ Feature: Markdown
     And I should see "<h1 id=\"my-title\">My Title</h1>" in "_site/index.html"
 
   Scenario: Markdown in pagination on index
-    Given I have a configuration file with "paginate" set to "5"
+    Given I have a configuration file with:
+      | key      | value             |
+      | paginate | 5                 |
+      | gems     | [jekyll-paginate] |
     And I have an "index.html" page that contains "Index - {% for post in paginator.posts %} {{ post.content }} {% endfor %}"
     And I have a _posts directory
     And I have the following post:

features/pagination.feature

@@ -4,7 +4,10 @@ Feature: Site pagination
   I want divide the posts in several pages
 
   Scenario Outline: Paginate with N posts per page
-    Given I have a configuration file with "paginate" set to "<num>"
+    Given I have a configuration file with:
+      | key      | value             |
+      | paginate | <num>             |
+      | gems     | [jekyll-paginate] |
     And I have a _layouts directory
     And I have an "index.html" page that contains "{{ paginator.posts.size }}"
     And I have a _posts directory
@@ -32,6 +35,7 @@ Feature: Site pagination
       | paginate      | 1                              |
       | paginate_path | /blog/page-:num                |
       | permalink     | /blog/:year/:month/:day/:title |
+      | gems          | [jekyll-paginate]              |
     And I have a blog directory
     And I have an "blog/index.html" page that contains "{{ paginator.posts.size }}"
     And I have a _posts directory
@@ -59,6 +63,7 @@ Feature: Site pagination
       | paginate      | 1                              |
       | paginate_path | /blog/page/:num                |
       | permalink     | /blog/:year/:month/:day/:title |
+      | gems          | [jekyll-paginate]              |
     And I have a blog directory
     And I have an "blog/index.html" page that contains "{{ paginator.posts.size }}"
     And I have an "index.html" page that contains "Don't pick me!"

features/rendering.feature

@@ -15,6 +15,7 @@ Feature: Rendering
   Scenario: Don't place asset files in layout
     Given I have an "index.scss" page with layout "simple" that contains ".foo-bar { color:black; }"
     And I have an "index.coffee" page with layout "simple" that contains "whatever()"
+    And I have a configuration file with "gems" set to "[jekyll-coffeescript]"
     And I have a simple layout that contains "{{ content }}Ahoy, indeed!"
     When I run jekyll build
     Then the _site directory should exist
@@ -28,8 +29,15 @@ Feature: Rendering
     Then the _site directory should exist
     And I should see ".foo-bar {\n  color: red; }" in "_site/index.css"
 
-  Scenario: Render liquid in CoffeeScript
+  Scenario: Not render liquid in CoffeeScript without explicitly including jekyll-coffeescript
     Given I have an "index.coffee" page with animal "cicada" that contains "hey='for {{page.animal}}'"
     When I run jekyll build
     Then the _site directory should exist
+    And the "_site/index.js" file should not exist
+
+  Scenario: Render liquid in CoffeeScript with jekyll-coffeescript enabled
+    Given I have an "index.coffee" page with animal "cicada" that contains "hey='for {{page.animal}}'"
+    And I have a configuration file with "gems" set to "[jekyll-coffeescript]"
+    When I run jekyll build
+    Then the _site directory should exist
     And I should see "hey = 'for cicada';" in "_site/index.js"

features/step_definitions/jekyll_steps.rb

@@ -168,6 +168,12 @@ When /^I delete the file "(.*)"$/ do |file|
   File.delete(file)
 end
 
+##################
+#
+# Checking stuff
+#
+##################
+
 Then /^the (.*) directory should +exist$/ do |dir|
   assert File.directory?(dir), "The directory \"#{dir}\" does not exist"
 end

lib/jekyll/configuration.rb

@@ -261,6 +261,12 @@ module Jekyll
           "Markdown processor. Maruku support has been deprecated and will " +
           "be removed in 3.0.0. We recommend you switch to Kramdown."
       end
+
+      if config.key?('paginate') && config['paginate'] && !(config['gems'] || []).include?('jekyll-paginate')
+        Jekyll::Deprecator.deprecation_message "You appear to have pagination " +
+          "turned on, but you haven't included the `jekyll-paginate` gem. " +
+          "Ensure you have `gems: [jekyll-paginate]` in your configuration file."
+      end
       config
     end