From 3755577ba63f92d424ddccca41660e36752e8995 Mon Sep 17 00:00:00 2001
From: Sharif Olorin <sio@tesser.org>
Date: Sun, 10 Feb 2019 00:11:31 +0000
Subject: [PATCH] nixos/systemd: update max line length in systemd units

The length check was introduced[0] to match systemd's max line
length. This limit has been increased[1][2] to 1MiB, starting with
systemd v235.

[0] https://github.com/nixos/nixpkgs/issues/3403
[1] https://github.com/systemd/systemd/commit/e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af
    (relevant systemd commit)
[2] https://github.com/systemd/systemd/issues/3302
    (more context on systemd change)
---
 nixos/modules/system/boot/systemd.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index f783daba902a..58812bf33d9b 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -321,7 +321,9 @@ let
             in concatMapStrings (n:
               let s = optionalString (env."${n}" != null)
                 "Environment=${builtins.toJSON "${n}=${env.${n}}"}\n";
-              in if stringLength s >= 2048 then throw "The value of the environment variable ‘${n}’ in systemd service ‘${name}.service’ is too long." else s) (attrNames env)}
+              # systemd max line length is now 1MiB
+              # https://github.com/systemd/systemd/commit/e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af
+              in if stringLength s >= 1048576 then throw "The value of the environment variable ‘${n}’ in systemd service ‘${name}.service’ is too long." else s) (attrNames env)}
           ${if def.reloadIfChanged then ''
             X-ReloadIfChanged=true
           '' else if !def.restartIfChanged then ''