From ce29e4efc7f7986612be1f6cbd7598814545cdbe Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 11 Dec 2006 15:42:02 +0000
Subject: [PATCH] * More refactoring.

svn path=/nixos/trunk/; revision=7314
---
 configuration/boot-environment.nix | 35 +++++-------------------------
 configuration/config.nix           | 29 +++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 30 deletions(-)
 create mode 100644 configuration/config.nix

diff --git a/configuration/boot-environment.nix b/configuration/boot-environment.nix
index dfab2b61670c..4d7f9d38d7b0 100644
--- a/configuration/boot-environment.nix
+++ b/configuration/boot-environment.nix
@@ -202,38 +202,13 @@ rec {
   };
 
 
-  lib = pkgs.library;
+  config = import ./config.nix pkgs.library configData;
 
-
-  config = rec {
-
-    # The user configuration.
-    config = {
-      networking = {
-        hostname = "nixos";
-      };
+  # The user configuration.
+  configData = {
+    networking = {
+      hostname = "nixos";
     };
-
-    # The option declarations, i.e., option names with defaults and
-    # documentation.
-    declarations = import ./options.nix;
-
-    # Get the option named `name' from the user configuration, using
-    # its default value if it's not defined.
-    get = name:
-      let
-        sameName = lib.filter (opt: lib.eqLists opt.name name) declarations;
-        default =
-          if sameName == []
-          then abort ("Undeclared option `" + printName name + "'.")
-          else if !builtins.head sameName ? default
-          then abort ("Option `" + printName name + "' has no default.")
-          else (builtins.head sameName).default;
-      in lib.getAttr name default config;
-  
-    printName = name: lib.concatStrings (lib.intersperse "." name);
-
   };
 
-
 }
diff --git a/configuration/config.nix b/configuration/config.nix
new file mode 100644
index 000000000000..705b44407af3
--- /dev/null
+++ b/configuration/config.nix
@@ -0,0 +1,29 @@
+# Given a configuration, this function returns an object with a `get'
+# method for retrieving the values of options, falling back to the
+# defaults declared in options.nix if no value is given for an
+# option.
+
+lib: config:
+
+rec {
+
+  # The option declarations, i.e., option names with defaults and
+  # documentation.
+  declarations = import ./options.nix;
+
+  # Get the option named `name' from the user configuration, using
+  # its default value if it's not defined.
+  get = name:
+    let
+      sameName = lib.filter (opt: lib.eqLists opt.name name) declarations;
+      default =
+        if sameName == []
+        then abort ("Undeclared option `" + printName name + "'.")
+        else if !builtins.head sameName ? default
+        then abort ("Option `" + printName name + "' has no default.")
+        else (builtins.head sameName).default;
+    in lib.getAttr name default config;
+  
+  printName = name: lib.concatStrings (lib.intersperse "." name);
+
+}