From 4a219c8aebf8275118981db856355f88aaa84bca Mon Sep 17 00:00:00 2001
From: Ivan Petkov <ivanppetkov@gmail.com>
Date: Sun, 10 Dec 2023 10:57:50 -0800
Subject: [PATCH] nut: patch nutshutdown to set a default for NUT_CONFPATH

The way we build the package results in the binaries being hardcoded to
look for $out/etc/ups.conf instead of /etc/nut/ups.conf (where the
module places the file). This results in `upsdrvctl` failing to dispatch
shutdown commands (since it cannot find the configuration) and prevents
a primary monitor from cutting power to the appropriate UPS.

Note that we cannot use `--sysconfdir=/etc/nut` as a configure flag
since that results in the install phase trying to install directly into
/etc/nut which predictably fails in the sandbox.
---
 pkgs/applications/misc/nut/default.nix                 |  7 +++++++
 .../misc/nut/nutshutdown-conf-default.patch            | 10 ++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 pkgs/applications/misc/nut/nutshutdown-conf-default.patch

diff --git a/pkgs/applications/misc/nut/default.nix b/pkgs/applications/misc/nut/default.nix
index 5596fc6010ec..9436b14e5138 100644
--- a/pkgs/applications/misc/nut/default.nix
+++ b/pkgs/applications/misc/nut/default.nix
@@ -30,6 +30,13 @@ stdenv.mkDerivation rec {
   };
 
   patches = [
+    # This patch injects a default value for NUT_CONFPATH into the nutshutdown script
+    # since the way we build the package results in the binaries being hardcoded to check
+    # $out/etc/ups.conf instead of /etc/nut/ups.conf (where the module places the file).
+    # We also cannot use `--sysconfdir=/etc/nut` since that results in the install phase
+    # trying to install directly into /etc/nut which predictably fails
+    ./nutshutdown-conf-default.patch
+
     (substituteAll {
       src = ./hardcode-paths.patch;
       avahi = "${avahi}/lib";
diff --git a/pkgs/applications/misc/nut/nutshutdown-conf-default.patch b/pkgs/applications/misc/nut/nutshutdown-conf-default.patch
new file mode 100644
index 000000000000..28e5a286126d
--- /dev/null
+++ b/pkgs/applications/misc/nut/nutshutdown-conf-default.patch
@@ -0,0 +1,10 @@
+diff --git a/scripts/systemd/nutshutdown.in b/scripts/systemd/nutshutdown.in
+index ace2485b3..9dee869bb 100755
+--- a/scripts/systemd/nutshutdown.in
++++ b/scripts/systemd/nutshutdown.in
+@@ -1,4 +1,5 @@
+ #!/bin/sh
++export NUT_CONFPATH="${NUT_CONFPATH-/etc/nut}"
+ 
+ # This script requires both nut-server (drivers)
+ # and nut-client (upsmon) to be present locally