From fd7daf9fc47e21bc5eaa7793fb23e0b647558e45 Mon Sep 17 00:00:00 2001
From: Donovan Glover <donovan@dglover.co>
Date: Thu, 3 Aug 2023 12:27:59 -0400
Subject: [PATCH] nixos/nixos-containers: add restartIfChanged option

This commit makes auto-restarting declarative containers optional.

This is useful when you don't want changes to your config to automatically
restart the container and thus stop any applications running inside it.
---
 nixos/modules/virtualisation/nixos-containers.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/virtualisation/nixos-containers.nix b/nixos/modules/virtualisation/nixos-containers.nix
index 5df9942dbc04..aa85665af695 100644
--- a/nixos/modules/virtualisation/nixos-containers.nix
+++ b/nixos/modules/virtualisation/nixos-containers.nix
@@ -649,6 +649,15 @@ in
               '';
             };
 
+            restartIfChanged = mkOption {
+              type = types.bool;
+              default = true;
+              description = lib.mdDoc ''
+                Whether the container should be restarted during a NixOS
+                configuration switch if its definition has changed.
+              '';
+            };
+
             timeoutStartSec = mkOption {
               type = types.str;
               default = "1min";
@@ -826,7 +835,7 @@ in
                 containerConfig.path
                 config.environment.etc."${configurationDirectoryName}/${name}.conf".source
               ];
-              restartIfChanged = true;
+              restartIfChanged = containerConfig.restartIfChanged;
             }
           )
       )) config.containers)