From 3feeedb5e2dd1a21bbbf72bdbca58c86b229f882 Mon Sep 17 00:00:00 2001
From: zowoq <59103226+zowoq@users.noreply.github.com>
Date: Sun, 22 Jan 2023 11:07:12 +1000
Subject: [PATCH] buildGoModule: make the vendor fetcher error if it is empty

---
 pkgs/build-support/go/module.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/build-support/go/module.nix b/pkgs/build-support/go/module.nix
index 448143f76908..284cc1586dad 100644
--- a/pkgs/build-support/go/module.nix
+++ b/pkgs/build-support/go/module.nix
@@ -145,6 +145,11 @@ let
       cp -r --reflink=auto vendor $out
     ''}
 
+      if ! [ "$(ls -A $out)" ]; then
+        echo "vendor folder is empty, please set 'vendorHash = null;' or 'vendorSha256 = null;' in your expression"
+        exit 10
+      fi
+
       runHook postInstall
     '';