curRelease: guard against missing channel

NixOS · Apr 13, 2020 · 945aa8a · 945aa8a
1 parent ed29118
commit 945aa8a
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/mirror-nixos-branch.pl b/mirror-nixos-branch.pl
@@ -112,6 +112,12 @@ sub fetch {
 
 if ($bucketChannels) {
     # Guard against the channel going back in time.
+    my $curRelease = "";
+    my $object = $bucketChannels->get_key($channelName);
+    if (defined($object)) {
+        $curRelease = $object->{'x-amz-website-redirect-location'} // "";
+    }
+
     my $curRelease = $bucketChannels->get_key($channelName)->{'x-amz-website-redirect-location'} // "";
     if (!defined $ENV{'FORCE'}) {
         print STDERR "previous release is $curRelease\n";