Disable channels on binary cached based Hydra instances

src/lib/Hydra/Helper/CatalystUtils.pm

@@ -25,6 +25,7 @@ our @EXPORT = qw(
     getResponsibleAuthors
     setCacheHeaders
     approxTableSize
+    requireLocalStore
 );
 
 
@@ -343,4 +344,11 @@ sub approxTableSize {
 }
 
 
+sub requireLocalStore {
+    my ($c) = @_;
+    notFound($c, "Nix channels are not supported by this Hydra server.")
+        if ($c->config->{store_mode} // "direct") ne "direct";
+}
+
+
 1;