Re: [PATCH] gitweb: Fix "Use of uninitialized value" warning in git_feed

Junio C Hamano wrote:

Jakub Narebski [off-list ref] writes:

quoted

Initial (root) commit has no parents, and $co{'parent'} is
undefined. Use '--root' for initial commit.

This fixes "Use of uninitialized value in open at gitweb/gitweb.perl
line 4925." warning.

[...]

quoted

--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl

@@ -4923,7 +4923,8 @@ XML
 
 		# get list of changed files
 		open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
-			$co{'parent'}, $co{'id'}, "--", (defined $file_name ? $file_name : ())
+			$co{'parent'} || "--root",
+			$co{'id'}, "--", (defined $file_name ? $file_name : ())
 			or next;
 		my @difftree = map { chomp; $_ } <$fd>;
 		close $fd

I do not think you would need to make --root conditional...

I need at last make $co{'parent'} conditional, i.e. at least 
"$co{'parent'} || ()" or equivalent (e.g. like for $file_name).
I cannot omit $co{'parent'} because parents might be rewritten;
feeds accept now path limiting. So why not this way?
-- 
Jakub Narebski
Poland