From cdd4547867c80bb6ced21d3800d06907090104be Mon Sep 17 00:00:00 2001
From: zowoq <59103226+zowoq@users.noreply.github.com>
Date: Wed, 12 Aug 2020 20:14:58 +1000
Subject: [PATCH] buildGoModule: check if vendor exists with deleteVendor

---
 pkgs/development/go-modules/generic/default.nix | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/go-modules/generic/default.nix b/pkgs/development/go-modules/generic/default.nix
index 020f22ecd33..c1550238721 100644
--- a/pkgs/development/go-modules/generic/default.nix
+++ b/pkgs/development/go-modules/generic/default.nix
@@ -85,10 +85,15 @@ let
       runHook preBuild
 
       if [ ${deleteFlag} == "true" ]; then
-        rm -rf vendor
+        if [ ! -d vendor ]; then
+          echo "vendor folder does not exist, 'deleteVendor' is not needed"
+          exit 10
+        else
+          rm -rf vendor
+        fi
       fi
 
-      if [ -e vendor ]; then
+      if [ -d vendor ]; then
         echo "vendor folder exists, please set 'vendorSha256 = null;' in your expression"
         exit 10
       fi