implimented current-source-file()

lib/compass/sass_extensions/functions/env.rb

@@ -12,5 +12,8 @@ module Compass::SassExtensions::Functions::Env
 
   alias :current_date :current_time
 
+  def current_source_file
+    Sass::Script::String.new(options[:filename].to_s)
+  end
 
 end

test/fixtures/stylesheets/envtest/css/env.css

@@ -3,4 +3,6 @@
 .time {
   time: "<%= Time.now.strftime("%F") %>"; }
 .date {
-  date: "<%= Time.now.strftime("%F") %>"; }
+  date: "<%= Time.now.strftime("%F") %>"; }
+.filename {
+  file: <%= filename.gsub(%r{/scss/}, '/sass/') %>; }

test/fixtures/stylesheets/envtest/sass/env.scss

@@ -8,4 +8,8 @@
 
 .date {
   date: current-date("%F");
+}
+
+.filename {
+  file: current-source-file();
 }

test/integrations/compass_test.rb

@@ -140,6 +140,7 @@ private
     for name in arguments
       actual_result_file = "#{tempfile_path(@current_project)}/#{name}.css"
       expected_result_file = "#{result_path(@current_project)}/#{name}.css"
+      @filename = expected_result_file.gsub('css', 'scss')
       actual_lines = File.read(actual_result_file)
       actual_lines.gsub!(/^@charset[^;]+;/,'') if options[:ignore_charset]
       actual_lines = actual_lines.split("\n").reject{|l| l=~/\A\Z/}
@@ -221,4 +222,8 @@ private
     File.join(project_path(project_name), "saved")
   end
 
+  def filename
+    @filename
+  end
+
 end