reorganize modules

1 files changed, 63 insertions, 0 deletions

diff --git a/modules/system/default.nix b/modules/system/default.nix
new file mode 100644
index 0000000..9435f92
--- /dev/null
+++ b/modules/system/default.nix
@@ -0,0 +1,63 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.system;
+
+in
+
+{
+  options = {
+
+    system.build = mkOption {
+      internal = true;
+      default = {};
+      description = ''
+        Attribute set of derivation used to setup the system.
+      '';
+    };
+
+    system.path = mkOption {
+      internal = true;
+      type = types.package;
+      description = ''
+        The packages you want in the system environment.
+      '';
+    };
+
+    system.nixdarwinLabel = mkOption {
+      type = types.str;
+      default = "16.09";
+    };
+
+  };
+
+  config = {
+
+    system.build.toplevel = pkgs.stdenvNoCC.mkDerivation {
+      name = "nixdarwin-system-${cfg.nixdarwinLabel}";
+      preferLocalBuild = true;
+
+      activationScript = cfg.activationScripts.script.text;
+      inherit (cfg) nixdarwinLabel;
+
+      buildCommand = ''
+        mkdir $out
+
+        ln -s ${cfg.build.etc}/etc $out/etc
+        ln -s ${cfg.path} $out/sw
+
+        echo "$activationScript" > $out/activate
+        substituteInPlace $out/activate --subst-var out
+        chmod u+x $out/activate
+        unset activationScript
+
+        echo -n "$nixdarwinLabel" > $out/nixdarwin-version
+        echo -n "$system" > $out/system
+      '';
+    };
+
+  };
+}