From 6aac14a46d44dd0956a9fc3e7e94dbbacd54d5d8 Mon Sep 17 00:00:00 2001
From: Rodney Lorrimar <rodney.lorrimar@iohk.io>
Date: Wed, 25 Apr 2018 06:56:28 +0100
Subject: [PATCH] buildkite-agent: fix variable expansion in hook scripts

@cleverca found this bug in the declarative hooks config. Any shell
variables referenced in a hook script would get expanded by the hooks
directory builder.

Prevent variable expansion by quoting the here doc limit string.
---
 modules/services/buildkite-agent.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/services/buildkite-agent.nix b/modules/services/buildkite-agent.nix
index 96c2f3b3..1438eeef 100644
--- a/modules/services/buildkite-agent.nix
+++ b/modules/services/buildkite-agent.nix
@@ -17,7 +17,7 @@ let
 
   hooksDir = let
     mkHookEntry = name: value: ''
-      cat > $out/${name} <<EOF
+      cat > $out/${name} <<'EOF'
       #! ${pkgs.stdenv.shell}
       set -e
       ${value}