Fall back to normal loading if the haml-edge gem isn't found.

lib/compass/dependencies.rb

@@ -1,3 +1,9 @@
-require 'rubygems'
-gem 'haml-edge','>= 2.1'
-require 'sass'
+unless defined?(Sass)
+  require 'rubygems'
+  begin
+    gem 'haml-edge','>= 2.1'
+  rescue Exception
+    $stderr.puts "WARNING: haml-edge gem not found. Trying to find haml on the load path."
+  end
+  require 'sass'
+end

test/test_helper.rb

@@ -17,6 +17,7 @@ linked_haml = File.dirname(__FILE__) + '/haml'
 if File.exists?(linked_haml) && !$:.include?(linked_haml + '/lib')
   puts "[ using linked Haml ]"
   $:.unshift linked_haml + '/lib'
+  require 'sass'
 else
   need_gems = true
 end