gendistrib: avoid errors when hdlists are not stored in the main media_info

gendistrib assumes the hdlist and synthesis files are present in the
master media_info directory, and tries to calculate md5sums for them.
This results in error messages if they are not stored there. This patch
prevents the errors.

1 files changed, 5 insertions, 2 deletions

diff --git a/gendistrib b/gendistrib
index 5baf66b..52766ca 100755
--- a/gendistrib
+++ b/gendistrib
@@ -183,9 +183,12 @@ if (grep { !$_->{noneedrebuild} } @hdlists) {
     unless ($nomd5sum) {
 	# this MD5SUM is mostly obsolete, but is still needed up to 2007.1
 	# (and even on cooker for existing urpmi.cfg)
-	my $md5sum = `cd $destinfodir ; /usr/bin/md5sum hdlist_* synthesis*`;
+	require File::Glob;
+	my $md5sum1 = `cd $destinfodir ; /usr/bin/md5sum hdlist_*`   if glob("$destinfodir/hdlist_*");
+	my $md5sum2 = `cd $destinfodir ; /usr/bin/md5sum synthesis*` if glob("$destinfodir/synthesis*");
 	open my $md5sumfh, '>', "$destinfodir/MD5SUM" or die "Can't create $destinfodir/MD5SUM: $!\n";
-	print $md5sumfh $md5sum;
+	print $md5sumfh $md5sum1 if $md5sum1;
+	print $md5sumfh $md5sum2 if $md5sum2;
     }
 
     print STDERR "Calculating size of medias\n" unless $nooutput;