new page features useful for sitemap traversal

support indexes which use the `directory_index` extension
add a `data` accessor to pages

features/sitemap_traversal.features

@@ -53,4 +53,21 @@ Feature: Step through sitemap as a tree
   Scenario: Proxied page has source_file
     Given the Server is running at "traversal-app"
     When I go to "/sub/fake.html"
-    Then I should see "Source: source/proxied.html.erb"
+    Then I should see "Source: source/proxied.html.erb"
+
+  Scenario: Child pages have data
+    Given the Server is running at "traversal-app"
+    When I go to "/directory-indexed"
+    Then I should see "Title of Sibling One"
+    Then I should see "Title of Sibling Two"
+
+  Scenario: When directory_index extension is active, child pages are found in named directory
+    Given the Server is running at "traversal-app"
+    When I go to "/directory-indexed"
+    Then I should see "Parent: index.html"
+    Then I should see "Child: directory-indexed/fake.html"
+    Then I should see "Child: directory-indexed/fake2.html"
+    Then I should see "Child: directory-indexed/sibling.html"
+    Then I should see "Child: directory-indexed/sibling2.html"
+    Then I should see "Child: directory-indexed/sub2/index.html"
+    Then I should see "Sibling: root.html"

fixtures/traversal-app/config.rb

@@ -1,2 +1,7 @@
+activate :directory_indexes
+
 page "/sub/fake.html", :proxy => "/proxied.html", :ignore => true
-page "/sub/fake2.html", :proxy => "/proxied.html", :ignore => true
+page "/sub/fake2.html", :proxy => "/proxied.html", :ignore => true
+
+page "/directory-indexed/fake.html", :proxy => "/proxied.html", :ignore => true
+page "/directory-indexed/fake2.html", :proxy => "/proxied.html", :ignore => true

fixtures/traversal-app/source/directory-indexed/sibling.html.erb

@@ -0,0 +1,3 @@
+---
+title: Title of Sibling One
+---

fixtures/traversal-app/source/directory-indexed/sibling2.html.erb

@@ -0,0 +1,3 @@
+---
+title: Title of Sibling Two
+---

fixtures/traversal-app/source/layout.erb

@@ -10,4 +10,10 @@ Source: <%= current_page.source_file.sub(root + "/", "") %>
 
 <% current_page.siblings.each do |p| %>
   Sibling: <%= p.path %>
+<% end %>
+
+<% current_page.children.each do |p| %>
+  <% if p.data %>
+    Data: <%= p.data %>
+  <% end %>
 <% end %>

lib/middleman/sitemap/page.rb

@@ -99,9 +99,31 @@ module Middleman::Sitemap
       end
     end
     
+    
+    
     def directory_index?
-      path.include?(app.index_file) || path =~ /\/$/
+      path.include?(app.index_file) || path =~ /\/$/ || eponymous_directory?
     end
+
+    def eponymous_directory?
+      !!Dir.exists?(File.join(app.source_dir, eponymous_directory_path))
+    end
+    
+    def eponymous_directory_path
+      path.sub('.html', '/').sub(/\/$/, "") + "/"
+    end
+    
+    def relative_path
+      source_file.sub(app.source_dir, '')
+    end
+    
+    def data
+      data, content = app.frontmatter.data(relative_path)
+      data || nil
+    end
+    
+    
+    
     
     def parent
       parts = path.split("/")
@@ -126,17 +148,22 @@ module Middleman::Sitemap
     
     def children
       return [] unless directory_index?
-      
-      base_path = path.sub("#{app.index_file}", "")
-      prefix    = /^#{base_path.sub("/", "\\/")}/
 
+      if eponymous_directory?
+        base_path = eponymous_directory_path
+        prefix    = /^#{base_path.sub("/", "\\/")}/
+      else
+        base_path = path.sub("#{app.index_file}", "")
+        prefix    = /^#{base_path.sub("/", "\\/")}/
+      end
+            
       store.all_paths.select do |sub_path|
         sub_path =~ prefix
       end.select do |sub_path|
         path != sub_path
       end.select do |sub_path|
-       relative_path = sub_path.sub(prefix, "")
-       parts = relative_path.split("/")
+       inner_path = sub_path.sub(prefix, "")
+       parts = inner_path.split("/")
        if parts.length == 1
          true
        elsif parts.length == 2