Make pages inherit their sidebar/header/footer from parent directories regardless of the current 'page_file_dir' of the wiki. refs #413 (https://github.com/github/gollum/issues/413)

lib/gollum/frontend/app.rb

@@ -294,9 +294,8 @@ module Precious
     def show_page_or_file(fullpath)
       path         = extract_path(fullpath)
       name         = extract_name(fullpath)
-      # This breaks headers, footers, and sidebars.
+      wiki_options = settings.wiki_options.merge({ :page_file_dir => path })
-      # wiki_options = settings.wiki_options.merge({ :page_file_dir => path })
+      wiki         = Gollum::Wiki.new(settings.gollum_path, wiki_options)
-      wiki         = Gollum::Wiki.new(settings.gollum_path, settings.wiki_options)
 
       if page = wiki.page(name)
         @page = page

lib/gollum/page.rb

@@ -434,7 +434,9 @@ module Gollum
     end
 
     # Loads a sub page.  Sub page names (footers, headers, sidebars) are prefixed with
-    # an underscore to distinguish them from other Pages.
+    # an underscore to distinguish them from other Pages. If there is not one within
+    # the current directory, starts walking up the directory tree to try and find one
+    # within parent directories.
     #
     # name - String page name.
     #
@@ -447,7 +449,7 @@ module Gollum
 
       dirs = self.path.split('/')
       dirs.pop
-      map = @wiki.tree_map_for(@wiki.ref)
+      map = @wiki.tree_map_for(@wiki.ref, true)
       while !dirs.empty?
         if page = find_page_in_tree(map, name, dirs.join('/'))
           page.parent_page = self

lib/gollum/wiki.rb

@@ -682,10 +682,15 @@ module Gollum
     # listing is cached based on its actual commit SHA.
     #
     # ref - A String ref that is either a commit SHA or references one.
+    # ignore_page_file_dir - Boolean, if true, searches all files within the git repo, regardless of dir/subdir
     #
     # Returns an Array of BlobEntry instances.
-    def tree_map_for(ref)
+    def tree_map_for(ref, ignore_page_file_dir=false)
+      if ignore_page_file_dir
+        GitAccess.new(path, nil, @repo_is_bare).tree(ref)
+      else
         @access.tree(ref)
+      end
     rescue Grit::GitRuby::Repository::NoSuchShaFound
       []
     end

test/test_page.rb

@@ -195,3 +195,36 @@ context "Page" do
     assert_equal "/foo", Gollum::BlobEntry.normalize_dir("/foo")
   end
 end
+
+context "within a sub-directory" do
+  setup do
+    @wiki = Gollum::Wiki.new(testpath("examples/lotr.git"), { :page_file_dir => 'Rivendell' })
+  end
+
+  test "get existing page" do
+    page = @wiki.page('Elrond')
+    assert_equal Gollum::Page, page.class
+    assert page.raw_data =~ /^# Elrond\n\nElrond/
+    assert_equal 'Rivendell/Elrond.md', page.path
+    assert_equal :markdown, page.format
+    assert_equal @wiki.repo.commits.first.id, page.version.id
+  end
+
+  test "should not get page from parent dir" do
+    page = @wiki.page('Bilbo Baggins')
+    assert_equal nil, page
+  end
+
+  test "should inherit header/footer/sidebar pages from parent directories" do
+    page = @wiki.page('Elrond')
+
+    assert_equal Gollum::Page, page.sidebar.class
+    assert_equal Gollum::Page, page.header.class
+    assert_equal Gollum::Page, page.footer.class
+
+    assert page.sidebar.raw_data =~ /^Lord of the Rings/
+    assert page.header.raw_data =~ /^Hobbits/
+    assert page.footer.raw_data =~ /^Lord of the Rings/
+  end
+end
+