From 14cd8bc24874b33e87ec08ddb6d47502e76f17b0 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 26 Nov 2013 18:24:55 +0100
Subject: [PATCH] Allow services to specify a pre-stop script

---
 nixos/modules/system/boot/systemd-unit-options.nix | 8 ++++++++
 nixos/modules/system/boot/systemd.nix              | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/nixos/modules/system/boot/systemd-unit-options.nix b/nixos/modules/system/boot/systemd-unit-options.nix
index 4eb3f1a43a65..c0518599f17a 100644
--- a/nixos/modules/system/boot/systemd-unit-options.nix
+++ b/nixos/modules/system/boot/systemd-unit-options.nix
@@ -210,6 +210,14 @@ in rec {
       '';
     };
 
+    preStop = mkOption {
+      type = types.lines;
+      default = "";
+      description = ''
+        Shell commands executed to stop the service.
+      '';
+    };
+
     postStop = mkOption {
       type = types.lines;
       default = "";
diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index 31e795ea2d04..51c71c7a5af2 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -190,6 +190,12 @@ let
               ${config.postStart}
             '';
           })
+        (mkIf (config.preStop != "")
+          { serviceConfig.ExecStop = makeJobScript "${name}-pre-stop" ''
+              #! ${pkgs.stdenv.shell} -e
+              ${config.preStop}
+            '';
+          })
         (mkIf (config.postStop != "")
           { serviceConfig.ExecStopPost = makeJobScript "${name}-post-stop" ''
               #! ${pkgs.stdenv.shell} -e