From f81bebe2d7471031688a2e65701648df2ea191cf Mon Sep 17 00:00:00 2001
From: Michael Raskin <7c6f434c@mail.ru>
Date: Thu, 20 Dec 2007 11:36:30 +0000
Subject: [PATCH] Added possibility of building multiple configurations by one
 nixos-rebuild.

svn path=/nixos/trunk/; revision=9959
---
 installer/grub-menu-builder.sh |  8 ++++++--
 system/options.nix             | 10 +++++++++-
 system/system.nix              |  3 +++
 system/system.sh               |  7 +++++++
 4 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/installer/grub-menu-builder.sh b/installer/grub-menu-builder.sh
index 6fe5c8dd149b..9c76fbb6f6fc 100644
--- a/installer/grub-menu-builder.sh
+++ b/installer/grub-menu-builder.sh
@@ -88,9 +88,13 @@ EOF
 
 # Add all generations of the system profile to the menu, in reverse
 # (most recent to least recent) order.
+for link in $(
+	(ls -d $default/fine-tune/* ) \
+	| sort -n); do
+    date=$(stat --printf="%y\n" $link | sed 's/\..*//')
+    addEntry "NixOS - variation" $link ""
+done
 for generation in $(
-	(cd $default/fine-tune && ls -d *) \
-    | sort -n) $(
     (cd /nix/var/nix/profiles && ls -d system-*-link) \
     | sed 's/system-\([0-9]\+\)-link/\1/' \
     | sort -n -r); do
diff --git a/system/options.nix b/system/options.nix
index fc0484bd2399..5ade1e818057 100644
--- a/system/options.nix
+++ b/system/options.nix
@@ -1736,6 +1736,14 @@ root        ALL=(ALL) SETENV: ALL
     };
 
   };
-
+  
+  nesting = {
+	  children = mkOption {
+	      default = [];
+	      description = "
+		Additional configurations to build.
+	      ";
+	  };
+  };
 
 }
diff --git a/system/system.nix b/system/system.nix
index 6388906f705a..b1657f741387 100644
--- a/system/system.nix
+++ b/system/system.nix
@@ -356,6 +356,9 @@ rec {
       pkgs.diffutils
       pkgs.upstart # for initctl
     ];
+    children = map (x: ((import ./system.nix) 
+      {inherit platform stage2Init; configuration = x;}).system) 
+      config.nesting.children; 
     configurationName = config.boot.configurationName;
   }) (pkgs.getConfig ["checkConfigurationOptions"] false) 
 	optionDeclarations configuration ;
diff --git a/system/system.sh b/system/system.sh
index 080ad1c13c79..95f650f39aaa 100644
--- a/system/system.sh
+++ b/system/system.sh
@@ -14,6 +14,13 @@ ln -s $upstart $out/upstart
 echo "$kernelParams" > $out/kernel-params
 echo "$configurationName" > $out/configuration-name
 
+mkdir $out/fine-tune
+ChildCount=0;
+for i in $children; do 
+	ChildCount=$(( ChildCount + 1 ));
+	ln -s $i $out/fine-tune/child-$ChildCount;
+done
+
 cat > $out/menu.lst << GRUBEND
 kernel $kernel init=$bootStage2 $kernelParams
 initrd $initrd