Backwards and forwards compatibility with the ever-changing Sass::Plugin api.

lib/compass/compiler.rb

@@ -42,7 +42,7 @@ module Compass
     def out_of_date?
       Compass.configure_sass_plugin! unless Compass.sass_plugin_configured?
       sass_files.zip(css_files).each do |sass_filename, css_filename|
-        return sass_filename if Sass::Plugin.exact_stylesheet_needs_update?(css_filename, sass_filename)
+        return sass_filename if Sass::Plugin.send(:exact_stylesheet_needs_update?, css_filename, sass_filename)
       end
       false
     end
@@ -99,7 +99,7 @@ module Compass
     end
 
     def should_compile?(sass_filename, css_filename)
-      options[:force] || Sass::Plugin.exact_stylesheet_needs_update?(css_filename, sass_filename)
+      options[:force] || Sass::Plugin.send(:exact_stylesheet_needs_update?, css_filename, sass_filename)
     end
 
     # A sass engine for compiling a single file.
@@ -114,12 +114,13 @@ module Compass
     # if there's an error.
     def handle_exception(sass_filename, css_filename, e)
       logger.record :error, basename(sass_filename), "(Line #{e.sass_line}: #{e.message})"
-      write_file css_filename, error_contents(e), options.merge(:force => true)
+      write_file css_filename, error_contents(e, sass_filename), options.merge(:force => true)
     end
 
     # Haml refactored this logic in 2.3, this is backwards compatibility for either one
-    def error_contents(e)
+    def error_contents(e, sass_filename)
       if Sass::SyntaxError.respond_to?(:exception_to_css)
+        e.sass_template = sass_filename
         Sass::SyntaxError.exception_to_css(e, :full_exception => show_full_exception?)
       else
         Sass::Plugin.options[:full_exception] ||= show_full_exception?

lib/compass/sass_extensions/monkey_patches/stylesheet_updating.rb

@@ -2,22 +2,39 @@ require 'sass/plugin'
 
 # XXX: We can remove this monkeypatch once Sass 2.2 is released.
 module Sass::Plugin
-  class << self
-    unless method_defined?(:exact_stylesheet_needs_update?)
-      def stylesheet_needs_update?(name, template_path, css_path)
-        css_file = css_filename(name, css_path)
-        template_file = template_filename(name, template_path)
-        exact_stylesheet_needs_update?(css_file, template_file)
-      end
-      def exact_stylesheet_needs_update?(css_file, template_file)
-        if !File.exists?(css_file)
-          return true
-        else
-          css_mtime = File.mtime(css_file)
-          File.mtime(template_file) > css_mtime ||
-            dependencies(template_file).any?(&dependency_updated?(css_mtime))
-        end
+
+  # splits the stylesheet_needs_update? method into two pieces so I can use the exact_stylesheet_needs_update? piece
+  module StylesheetNeedsUpdate
+    def stylesheet_needs_update?(name, template_path, css_path)
+      css_file = css_filename(name, css_path)
+      template_file = template_filename(name, template_path)
+      exact_stylesheet_needs_update?(css_file, template_file)
+    end
+    def exact_stylesheet_needs_update?(css_file, template_file)
+      if !File.exists?(css_file)
+        return true
+      else
+        css_mtime = File.mtime(css_file)
+        File.mtime(template_file) > css_mtime ||
+          dependencies(template_file).any?(&dependency_updated?(css_mtime))
       end
     end
   end
-end
+
+  # At some point Sass::Plugin changed from using the metaclass to extend self.
+  metaclass = class << self; self; end
+  if metaclass.included_modules.include?(Sass::Plugin)
+    if method(:stylesheet_needs_update?).arity == 2
+      alias exact_stylesheet_needs_update? stylesheet_needs_update?
+    elsif !method_defined?(:exact_stylesheet_needs_update?)
+      include StylesheetNeedsUpdate
+    end
+  else
+    class << self
+      unless method_defined?(:exact_stylesheet_needs_update?)
+        include StylesheetNeedsUpdate
+      end
+    end
+  end
+
+end