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

@@ -126,7 +126,7 @@ module Precious
 
       redirect "/#{page.escaped_url_path}"
     end
-    
+
     get '/create/*' do
       wiki = Gollum::Wiki.new(settings.gollum_path, settings.wiki_options)
       @name = params[:splat].first
@@ -136,7 +136,7 @@ module Precious
         mustache :create
       end
     end
-    
+
     post '/create' do
       name         = params[:page]
       path         = sanitize_empty_params(params[:path])
@@ -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         = Gollum::Wiki.new(settings.gollum_path, settings.wiki_options)
+      wiki_options = settings.wiki_options.merge({ :page_file_dir => path })
+      wiki         = Gollum::Wiki.new(settings.gollum_path, 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)
-      @access.tree(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