git: Manually decode git output from utf-8, avoids warning messages on invalidly encoded output.

IkiWiki/Plugin/git.pm

@@ -136,14 +136,16 @@ sub safe_git (&@) {
 	}
 	# In parent.
 
+	# git output is probably utf-8 encoded, but may contain
+	# other encodings or invalidly encoded stuff. So do not rely
+	# on the normal utf-8 IO layer, decode it by hand.
+	binmode($OUT);
+
 	my @lines;
 	while (<$OUT>) {
+		$_=decode_utf8($_, 0);
+
 		chomp;
-		
-		# check for invalid utf-8, and toss it back to avoid crashes
-		if (! utf8::valid($_)) {
-			$_=encode_utf8($_);
-		}
 
 		push @lines, $_;
 	}

debian/changelog

@@ -1,6 +1,8 @@
 ikiwiki (3.08) UNRELEASED; urgency=low
 
   * git: Fix utf-8 encoding of author names.
+  * git: Manually decode git output from utf-8, avoids
+    warning messages on invalidly encoded output.
 
  -- Joey Hess <joeyh@debian.org>  Mon, 09 Mar 2009 14:00:21 -0400