--- a/app/helpers/browse_helper.rb
+++ b/app/helpers/browse_helper.rb
@@ -112,4 +112,20 @@ module BrowseHelper
     out
   end
   
+  def with_line_numbers(&block)
+    out = []
+    #yield.split("\n").each_with_index{ |s,i| out << "#{i+1}: #{s}" }
+    out << %Q{<table>}
+    yield.to_s.split("\n").each_with_index do |line, count|
+      lineno = count + 1
+      out << "<tr>"
+      out << %Q{<td class="line-numbers"><a href="#line#{lineno}" name="line#{lineno}">#{lineno}</a></td>} 
+      out << %Q{<td class="code">#{line}</td>}
+      out << "</tr>"
+    end
+    out << "</table>"
+    out.join("\n")
+    
+  end
+  
 end

--- a/app/views/browse/blob.html.erb
+++ b/app/views/browse/blob.html.erb
@@ -3,6 +3,6 @@
   Blob of <code><%= current_path.join("/") -%></code> 
   <small>(<%= link_to "raw blob data", raw_blob_path(@blob.sha, current_path) -%>)</small>
 </h1>
-<pre><%=h @blob.contents -%></pre>
+<pre><%= with_line_numbers{ h(@blob.contents) } -%></pre>
 
 <%= render :partial => "submenu" -%>

--- a/spec/helpers/browse_helper_spec.rb
+++ b/spec/helpers/browse_helper_spec.rb
@@ -68,6 +68,26 @@ describe BrowseHelper do
     build_tree_path("three").should == ["one", "two", "three"]
   end
   
+  describe "with_line_numbers" do
+    it "renders something with line numbers" do
+      numbered = with_line_numbers { "foo\nbar\nbaz" }
+      numbered.should include(%Q{<td class="line-numbers"><a href="#line2" name="line2">2</a></td>})
+      numbered.should include(%Q{<td class="code">bar</td>})
+    end
+  
+    it "renders one line with line numbers" do
+      numbered = with_line_numbers { "foo" }
+      numbered.should include(%Q{<td class="line-numbers"><a href="#line1" name="line1">1</a></td>})
+      numbered.should include(%Q{<td class="code">foo</td>})
+    end
+  
+    it "doesn't blow up when with_line_numbers receives nil" do
+      proc{
+        with_line_numbers{ nil }.should == "<table>\n</table>"
+      }.should_not raise_error
+    end
+  end
+  
   # it "builds breadcrumbs of the current_path" do
   #   stub!(:current_path).and_return(["one", "two", "tree"])
   #   breadcrumb_path.should include(%Q{<ul class="path_breadcrumbs">})