Merge pull request #398 from bhollis/link_to

link_to is page-aware

middleman-core/features/directory_index.feature

@@ -36,3 +36,20 @@ Feature: Directory Index
     Given the Server is running at "indexable-app"
     When I go to "/leave_me_alone/"
     Then I should see "File Not Found"
+
+  Scenario: Link_to knows about directory indexes
+    Given a fixture app "indexable-app"
+    And a file named "source/link_to.html.erb" with:
+    """
+    link_to: <%= link_to "Needs Index", "/needs_index.html" %>
+    explicit_link_to: <%= link_to "Explicit", "/needs_index/index.html" %>
+    unknown_link_to: <%= link_to "Unknown", "/unknown.html" %>
+    relative_link_to: <%= link_to "Relative", "needs_index.html" %>
+    """
+    And the Server is running at "indexable-app"
+    When I go to "/link_to/"
+    Then I should see 'link_to: <a href="/needs_index/">Needs Index</a>'
+    Then I should see 'explicit_link_to: <a href="/needs_index/index.html">Explicit</a>'
+    Then I should see 'unknown_link_to: <a href="/unknown.html">Unknown</a>'
+    # Relative links aren't touched
+    Then I should see 'relative_link_to: <a href="needs_index.html">Relative</a>'

middleman-core/lib/middleman-core/core_extensions/default_helpers.rb

@@ -102,5 +102,17 @@ module Middleman::CoreExtensions::DefaultHelpers
       result_path ||= asset_url(source, asset_folder)
       "#{result_path}"
     end
+
+    def link_to(*args, &block)
+      url_arg_index = block_given? ? 0 : 1
+      if url = args[url_arg_index]
+        # Only try to work with absolute URLs
+        if url.start_with? '/'
+          resource = sitemap.find_resource_by_path(url)
+          args[url_arg_index] = resource.url if resource
+        end
+      end
+      super(*args, &block)
+    end
   end
 end