cache the ref => sha lookup

lib/gollum/page.rb

@@ -246,15 +246,14 @@ module Gollum
     #
     # Returns a Gollum::Page or nil if the page could not be found.
     def find(name, version)
-      if commit = @wiki.repo.commit(version)
+      map = @wiki.tree_map_for(version)
-        map = @wiki.tree_map_for(commit.id)
       if page = find_page_in_tree(map, name)
-          page.version = commit
+        sha = @wiki.ref_map[version] || version
+        page.version = Grit::Commit.create(@wiki.repo, :id => sha)
         page
       end
+    rescue Grit::GitRuby::Repository::NoSuchShaFound
     end
-    end
-
     # Find a page in a given tree.
     #
     # map  - The Array tree map from Wiki#tree_map.

lib/gollum/wiki.rb

@@ -135,7 +135,9 @@ module Gollum
 
       parents = pcommit ? [pcommit] : []
       actor   = Grit::Actor.new(commit[:name], commit[:email])
-      index.commit(commit[:message], parents, actor)
+      sha = index.commit(commit[:message], parents, actor)
+      @ref_map.clear
+      sha
     end
 
     # Public: Update an existing page with new content. The location of the
@@ -172,7 +174,9 @@ module Gollum
       end
 
       actor = Grit::Actor.new(commit[:name], commit[:email])
-      index.commit(commit[:message], [pcommit], actor)
+      sha = index.commit(commit[:message], [pcommit], actor)
+      @ref_map.clear
+      sha
     end
 
     # Public: Delete a page.
@@ -192,7 +196,9 @@ module Gollum
       index.delete(page.path)
 
       actor = Grit::Actor.new(commit[:name], commit[:email])
-      index.commit(commit[:message], [pcommit], actor)
+      sha = index.commit(commit[:message], [pcommit], actor)
+      @ref_map.clear
+      sha
     end
 
     # Public: Lists all pages for this wiki.

test/test_markup.rb

@@ -349,6 +349,7 @@ context "Markup" do
     index.add("greek/Bilbo-Baggins.md", content)
     index.commit("Add alpha.jpg")
 
+    @wiki.clear_cache
     page = @wiki.page("Bilbo Baggins")
     rendered = Gollum::Markup.new(page).render
     assert_equal output, rendered