UTF-8 encoding hack

lib/annotate/annotate_models.rb

 module AnnotateModels
   class << self
+    UTF8 = "-*- encoding: utf-8 -*-"
+
     # Annotate Models plugin use this header
     COMPAT_PREFIX = "== Schema Info"
     PREFIX = "== Schema Information"
@@ -117,6 +119,7 @@ module AnnotateModels
     def annotate_one_file(file_name, info_block, options={})
       if File.exist?(file_name)
         old_content = File.read(file_name)
+        old_content.sub!(/^#.*encoding.*utf-8.*\n/, '')
 
         # Ignore the Schema version line because it changes with each migration
         header = Regexp.new(/(^# Table name:.*?\n(#.*\n)*\n)/)
@@ -126,12 +129,11 @@ module AnnotateModels
         if old_header == new_header
           false
         else
-          # Replace the old schema info with the new schema info
-          new_content = old_content.sub(/^# #{COMPAT_PREFIX}.*?\n(#.*\n)*\n/, info_block)
-          # But, if there *was* no old schema info, we simply need to insert it
-          if new_content == old_content
+          # Remove old schema info
+          old_content.sub!(/^# #{COMPAT_PREFIX}.*?\n(#.*\n)*\n/, '')
+
+          # Write it back
           new_content = options[:position] == 'before' ?  (info_block + old_content) : (old_content + "\n" + info_block)
-          end
 
           File.open(file_name, "wb") { |f| f.puts new_content }
           true
@@ -249,7 +251,7 @@ module AnnotateModels
         end
       end
 
-      header = PREFIX.dup
+      header = "#{UTF8.dup}\n# #{PREFIX.dup}"
 
       if options[:include_version]
         version = ActiveRecord::Migrator.current_version rescue 0