* lib/rdoc/rdoc.rb (RDoc#read_file_contents): take care of BOM.

  [ruby-dev:41452]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28062 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat May 29 12:05:51 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/rdoc/rdoc.rb (RDoc#read_file_contents): take care of BOM.
+	  [ruby-dev:41452]
+
 Sat May 29 10:12:36 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* gc.c (GC_PROF_TIMER_STOP): regularize `marked' to suppress

lib/rdoc/rdoc.rb

@@ -406,11 +406,13 @@ def document(argv)
   def read_file_contents(filename)
     content = open filename, "rb" do |f| f.read end
 
+    utf8 = content.sub!(/\A\xef\xbb\xbf/, '')
     if defined? Encoding then
       if /coding[=:]\s*([^\s;]+)/i =~ content[%r"\A(?:#!.*\n)?.*\n"]
-        if enc = ::Encoding.find($1)
-          content.force_encoding(enc)
-        end
+        enc = ::Encoding.find($1)
+      end
+      if enc ||= (Encoding::UTF_8 if utf8)
+        content.force_encoding(enc)
       end
     end
 

test/rdoc/test_rdoc_rdoc.rb

@@ -68,6 +68,18 @@ def test_read_file_contents_encoding_fancy
     assert_equal Encoding::UTF_8, contents.encoding
   end
 
+  def test_read_file_contents_encoding_with_signature
+    skip "Encoding not implemented" unless defined? ::Encoding
+
+    @tempfile.write "\xEF\xBB\xBF""hi everybody"
+    @tempfile.flush
+
+    bug3360 = '[ruby-dev:41452]'
+    contents = @rdoc.read_file_contents @tempfile.path
+    assert_equal "hi everybody", contents, bug3360
+    assert_equal Encoding::UTF_8, contents.encoding, bug3360
+  end
+
   def test_remove_unparsable
     file_list = %w[
       blah.class