From c3dd31f177b532e7e94b74afca7241778c23af6f Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Sun, 2 Jun 2019 09:03:41 +0200
Subject: [PATCH] maintainers/scripts/update.nix: handle null paths
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Previously we did not handle non-existant paths making the program crash.
Let’s show a proper error.
---
 maintainers/scripts/update.nix | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/maintainers/scripts/update.nix b/maintainers/scripts/update.nix
index 2d1f152ed770..b980514cc094 100755
--- a/maintainers/scripts/update.nix
+++ b/maintainers/scripts/update.nix
@@ -69,9 +69,12 @@ let
     let
       attrSet = pkgs.lib.attrByPath (pkgs.lib.splitString "." path) null pkgs;
     in
-      packagesWith (name: pkg: builtins.hasAttr "updateScript" pkg)
-                     (name: pkg: pkg)
-                     attrSet;
+      if attrSet == null then
+        builtins.throw "Attribute path `${path}` does not exists."
+      else
+        packagesWith (name: pkg: builtins.hasAttr "updateScript" pkg)
+                       (name: pkg: pkg)
+                       attrSet;
 
   packageByName = name:
     let