* Get the CD to build again.

svn path=/nixos/trunk/; revision=7356

configuration/options.nix

@@ -189,4 +189,13 @@
   }
 
   
+  {
+    name = ["services" "xserver" "enable"];
+    default = false;
+    description = "
+      Whether to enable the X server.
+    ";
+  }
+
+  
 ]

configuration/system.nix

@@ -108,7 +108,7 @@ rec {
 
   # The services (Upstart) configuration for the system.
   upstartJobs = import ./upstart.nix {
-    inherit pkgs nix splashThemes;
+    inherit config pkgs nix splashThemes;
   };
 
 

configuration/upstart.nix

@@ -1,4 +1,4 @@
-{pkgs, nix, splashThemes}:
+{config, pkgs, nix, splashThemes}:
 
 let 
 
@@ -6,6 +6,9 @@ let
     inherit (pkgs) runCommand;
   };
 
+  optional = option: service:
+    if config.get option then [service] else [];
+
 in
 
 import ../upstart-jobs/gather.nix {
@@ -39,22 +42,11 @@ import ../upstart-jobs/gather.nix {
       dhcp = pkgs.dhcpWrapper;
     })
 
-    # SSH daemon.
-    (import ../upstart-jobs/sshd.nix {
-      inherit (pkgs) openssh;
-    })
-
     # Nix daemon - required for multi-user Nix.
     (import ../upstart-jobs/nix-daemon.nix {
       inherit nix;
     })
 
-    # X server.
-    (import ../upstart-jobs/xserver.nix {
-      inherit (pkgs) substituteAll;
-      inherit (pkgs.xorg) xorgserver xf86inputkeyboard xf86inputmouse xf86videovesa;
-    })
-
     # Transparent TTY backgrounds.
     (import ../upstart-jobs/tty-backgrounds.nix {
       inherit (pkgs) stdenv splashutils;
@@ -71,6 +63,19 @@ import ../upstart-jobs/gather.nix {
 
   ]
 
+  # SSH daemon.
+  ++ optional ["services" "sshd" "enable"]
+    (import ../upstart-jobs/sshd.nix {
+      inherit (pkgs) openssh;
+    })
+
+  # X server.
+  ++ optional ["services" "xserver" "enable"]
+    (import ../upstart-jobs/xserver.nix {
+      inherit (pkgs) substituteAll;
+      inherit (pkgs.xorg) xorgserver xf86inputkeyboard xf86inputmouse xf86videovesa;
+    })
+
   # Handles the reboot/halt events.
   ++ (map
     (event: makeJob (import ../upstart-jobs/halt.nix {

installer/nixos-installer.nix

@@ -1,10 +1,14 @@
-{stdenv, runCommand, substituteAll, nix}:
+{ stdenv, runCommand, substituteAll, nix
+, # URL of the Nixpkgs distribution that the installer will pull.
+  # Leave empty for a pure source distribution.
+  nixpkgsURL ? ""
+}:
 
 substituteAll {
   src = ./nixos-installer.sh;
   dir = "bin";
   isExecutable = true;
-  inherit nix;
+  inherit nix nixpkgsURL;
 
   pathsFromGraph = ../helpers/paths-from-graph.sh;
 

installer/nixos-installer.sh

@@ -106,8 +106,9 @@ cp /etc/resolv.conf $mountPoint/etc/
 
 
 # Do a nix-pull to speed up building.
-nixpkgsURL=http://nix.cs.uu.nl/dist/nix/nixpkgs-0.11pre6984
-chroot $mountPoint @nix@/bin/nix-pull $nixpkgsURL/MANIFEST
+if test -n "@nixpkgsURL@"; then
+    chroot $mountPoint @nix@/bin/nix-pull @nixpkgsURL@/MANIFEST
+fi
 
 
 # Build the specified Nix expression in the target store and install

instances/rescue-cd.nix

@@ -1,53 +1,66 @@
-let
-
-  # The label used to identify the installation CD.
-  cdromLabel = "NIXOS";
-
-in
-
-  # Build boot scripts for the CD that find the CD-ROM automatically.
-  with import ../configuration/boot-environment.nix {
-    autoDetectRootDevice = true;
-    rootLabel = cdromLabel;
-    stage2Init = "/init";
-    readOnlyRoot = true;
-  };
-
-  
 rec {
 
-  inherit nixosInstaller bootStage1 upstartJobs; # !!! debug
+  
+  configuration = {
+    boot = {
+      autoDetectRootDevice = true;
+      readOnlyRoot = true;
+      # The label used to identify the installation CD.
+      rootLabel = "NIXOS";
+    };
+    services = {
+      sshd = {
+        enable = false;
+      };
+      xserver = {
+        enable = false;
+      };
+    };
+  };
 
 
+  system = import ../configuration/system.nix {
+    inherit configuration;
+    stage2Init = "/init";
+  };
+
+
+  pkgs = system.pkgs;
+  
+
   # Since the CD is read-only, the mount points must be on disk.
   cdMountPoints = pkgs.runCommand "mount-points" {} "
     ensureDir $out
     cd $out
     mkdir proc sys tmp etc dev var mnt nix nix/var
-    touch $out/${cdromLabel}
+    touch $out/${configuration.boot.rootLabel}
   ";
 
 
   # We need a copy of the Nix expressions for Nixpkgs and NixOS on the
   # CD.  We put them in a tarball because accessing that many small
   # files from a slow device like a CD-ROM takes too long.
-  makeTarball = tarName: input: pkgs.runCommand "tarball" "
+  makeTarball = tarName: input: pkgs.runCommand "tarball" {inherit tarName;} "
     ensureDir $out
     (cd ${input} && tar cvfj $out/${tarName} . \\
-      --exclude '*~' --exclude '.svn' \\
+      --exclude '*~' \\
       --exclude 'pkgs' --exclude 'result')
   ";
 
   
-  # Put the current directory in the tarball.  !!! This gives us a lot
-  # of crap (like .svn if this is a working copy).  An "svn export"
-  # would be better, but that's impure.
-  nixosTarball = makeTarball "nixos.tar.bz2" ./.;
+  # Put the current directory in a tarball (making sure to filter
+  # out crap like the .svn directories).
+  nixosTarball = makeTarball "nixos.tar.bz2" (builtins.filterSource
+    (name: let base = baseNameOf (toString name); in base != ".svn" && base != "result") ./..);
+
+
+  # Get a recent copy of Nixpkgs.
+  nixpkgsRel = "nixpkgs-0.11pre7355";
+  nixpkgsURL = http://nix.cs.uu.nl/dist/nix/ + nixpkgsRel;
 
-  
   nixpkgsTarball = pkgs.fetchurl {
-    url = http://nix.cs.uu.nl/dist/nix/nixpkgs-0.11pre7087/nixpkgs-0.11pre7087.tar.bz2;
-    md5 = "c5840fcd049d75e00ad856ecbbef6857";
+    url = nixpkgsURL + "/" + nixpkgsRel + ".tar.bz2";
+    md5 = "9d3e5e9f6ab64536803abf3f2e1c6056";
   };
 
 
@@ -68,7 +81,7 @@ rec {
       { source = pkgs.kernel + "/vmlinuz";
         target = "isolinux/vmlinuz";
       }
-      { source = initialRamdisk + "/initrd";
+      { source = system.initialRamdisk + "/initrd";
         target = "isolinux/initrd";
       }
       { source = cdMountPoints;
@@ -82,7 +95,7 @@ rec {
       }
     ];
 
-    init = bootStage2;
+    init = system.bootStage2;
     
     bootable = true;
     bootImage = "isolinux/isolinux.bin";

upstart-jobs/tty-backgrounds-combine.sh

@@ -24,14 +24,14 @@ for ((n = 0; n < ${#ttys[*]}; n++)); do
     echo "TTY $tty -> $theme"
 
     themeName=$(cd $theme && ls | grep -v default)
-    
-    ln -sf $theme/$themeName $out/$themeName
+
+    ln -sfn $theme/$themeName $out/$themeName
 
     if test -e $out/$tty; then
         echo "Multiple themes defined for the same TTY!"
         exit 1
     fi
 
-    ln -sf $themeName $out/$tty
+    ln -sfn $themeName $out/$tty
     
 done