From 7e05b8b75e0f4b370cc7d4b78b3fb18a3678b360 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Thu, 19 Mar 2009 10:02:02 +0000
Subject: [PATCH] * Future proofing: assume we can read manifests up to version
 10   (which should therefore be backwards compatible).

---
 scripts/download-using-manifests.pl.in | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/download-using-manifests.pl.in b/scripts/download-using-manifests.pl.in
index 20c01db3c..0c7f8250f 100644
--- a/scripts/download-using-manifests.pl.in
+++ b/scripts/download-using-manifests.pl.in
@@ -19,10 +19,15 @@ my %localPaths;
 my %patches;
 
 for my $manifest (glob "$manifestDir/*.nixmanifest") {
-    if (readManifest($manifest, \%narFiles, \%localPaths, \%patches) < 3) {
+    my $version = readManifest($manifest, \%narFiles, \%localPaths, \%patches);
+    if ($version < 3) {
         print STDERR "you have an old-style manifest `$manifest'; please delete it\n";
         exit 1;
     }
+    if ($version >= 10) {
+        print STDERR "manifest `$manifest' is too new; please delete it or upgrade Nix\n";
+        exit 1;
+    }
 }