From 5d7000df689f2ee654cbb45ec440764c54074430 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 16 Feb 2015 11:57:36 +0100
Subject: Automatically set nix.nrBuildUsers to at least nix.maxJobs

---
 nixos/modules/services/misc/nix-daemon.nix | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

(limited to 'nixos/modules')

diff --git a/nixos/modules/services/misc/nix-daemon.nix b/nixos/modules/services/misc/nix-daemon.nix
index 9979c6c9815b..81fabd1923f9 100644
--- a/nixos/modules/services/misc/nix-daemon.nix
+++ b/nixos/modules/services/misc/nix-daemon.nix
@@ -67,12 +67,12 @@ in
         type = types.int;
         default = 1;
         example = 64;
-        description = "
+        description = ''
           This option defines the maximum number of jobs that Nix will try
           to build in parallel.  The default is 1.  You should generally
           set it to the number of CPUs in your system (e.g., 2 on an Athlon
           64 X2).
-        ";
+        '';
       };
 
       buildCores = mkOption {
@@ -204,7 +204,6 @@ in
 
       nrBuildUsers = mkOption {
         type = types.int;
-        default = 10;
         description = ''
           Number of <literal>nixbld</literal> user accounts created to
           perform secure concurrent builds.  If you receive an error
@@ -323,12 +322,9 @@ in
         fi
       '';
 
-    users.extraUsers =
-      if cfg.nrBuildUsers >= cfg.maxJobs then
-        map makeNixBuildUser (range 1 cfg.nrBuildUsers)
-      else
-        throw "Not enough build users (${cfg.nrBuildUsers}) to support ${cfg.maxJobs} build jobs. Change nrBuildUsers or maxJobs."
-      ;
+    nix.nrBuildUsers = mkDefault (lib.max 10 cfg.maxJobs);
+
+    users.extraUsers = map makeNixBuildUser (range 1 cfg.nrBuildUsers);
 
     system.activationScripts.nix = stringAfter [ "etc" "users" ]
       ''
-- 
cgit 1.4.1