* User configuration: use the `networking.hostname' option to

configure the host name.

svn path=/nixu/trunk/; revision=7150

test/boot-environment.nix

@@ -183,8 +183,7 @@ rec {
   # everything else to bring up the system.
   bootStage2 = import ./boot-stage-2.nix {
     inherit (pkgs) genericSubstituter coreutils findutils
-      utillinux kernel udev
+      utillinux kernel udev upstart;
-      upstart;
     inherit upstartJobs;
     shell = pkgs.bash + "/bin/sh";
 
@@ -218,6 +217,42 @@ rec {
     ];
 
     inherit readOnlyRoot;
+
+    hostName = config.get ["networking" "hostname"];
+  };
+
+
+  lib = import ./pkgs/lib;
+
+
+  config = rec {
+
+    # The user configuration.
+    config = {
+      networking = {
+        hostname = "vindaloo";
+      };
+    };
+
+    # 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);
+
   };
 
 

test/boot-stage-2-init.sh

@@ -157,7 +157,7 @@ EOF
 
 
 # Set the host name.
-hostname nixos
+hostname @hostName@
 
 
 # Start an interactive shell.

test/boot-stage-2.nix

@@ -8,12 +8,14 @@
 
 , # The Upstart job configuration.
   upstartJobs
+
+, hostName
 }:
 
 genericSubstituter {
   src = ./boot-stage-2-init.sh;
   isExecutable = true;
-  inherit shell kernel upstart readOnlyRoot upstartJobs;
+  inherit shell kernel upstart readOnlyRoot upstartJobs hostName;
   path = [
     coreutils
     findutils

test/options.nix

@@ -1,22 +1,22 @@
-[
+[        
 
-  (option {
+  {
     name = ["networking" "hostname"];
     default = "nixos";
-    description = "The name of the machine."
+    description = "The name of the machine.";
-  })
+  }
 
-  (option {
+  {
     name = ["networking" "useDHCP"];
     default = true;
     description = "
       Whether to use DHCP to obtain an IP adress and other
       configuration for all network interfaces that are not manually
       configured.
-    "
+    ";
-  })
+  }
 
-  (option {
+  {
     name = ["networking" "interfaces"];
     default = [];
     example = [
@@ -30,10 +30,10 @@
       The configuration for each network interface.  If
       <option>networking.useDHCP</option> is true, then each interface
       not listed here will be configured using DHCP.
-    "
+    ";
-  })
+  }
 
-  (option {
+  {
     name = ["filesystems" "mountPoints"];
     example = [
       { device = "/dev/hda2";
@@ -46,27 +46,27 @@
       \"/\"</literal>).  This is the file system on which NixOS is (to
       be) installed..
     ";
-  })
+  }
 
-  (option {
+  {
     name = ["services" "syslogd" "tty"];
     default = 10;
     description = "
       The tty device on which syslogd will print important log
       messages.
     ";
-  })
+  }
     
-  (option {
+  {
     name = ["services" "mingetty" "ttys"];
     default = [1 2 3 4 5 6];
     description = "
       The list of tty (virtual console) devices on which to start a
       login prompt.
     ";
-  })
+  }
     
-  (option {
+  {
     name = ["services" "mingetty" "waitOnMounts"];
     default = false;
     description = "
@@ -75,23 +75,23 @@
       default we don't wait, but if for example your /home is on a
       separate partition, you may want to turn this on.
     ";
-  })
+  }
 
-  (option {
+  {
     name = ["services" "sshd" "enable"];
     default = false;
     description = "
       Whether to enable the Secure Shell daemon, which allows secure
       remote logins.
     ";
-  })
+  }
 
-  (option {
+  {
     name = ["services" "sshd" "forwardX11"];
     default = false;
     description = "
       Whether to enable sshd to forward X11 connections.
     ";
-  })
+  }
 
 ]