* Generate a Grub boot menu that contains all generations of the

system profile.

svn path=/nixu/trunk/; revision=7105

test/grub-menu-builder.sh

@@ -0,0 +1,50 @@
+#! @bash@/bin/sh -e
+
+default=$1
+if test -z "$1"; then
+    echo "Syntax: grub-menu-builder.sh <DEFAULT-CONFIG>"
+    exit 1
+fi
+
+
+target=/boot/grub/menu.lst
+tmp=$target.tmp
+
+cat > $tmp << GRUBEND
+# Automatically generated.  DO NOT EDIT THIS FILE!
+default=0
+timeout=5
+GRUBEND
+
+addEntry() {
+    name="$1"
+    path="$2"
+
+    cat >> $tmp << GRUBEND
+title $name
+GRUBEND
+
+    #cat $path/menu.lst >> $tmp
+
+    grep -v "title \|default=\|timeout=" < $path/menu.lst >> $tmp
+}
+
+
+if test -n "$tmp"; then
+    addEntry "NixOS - Default" $default
+fi
+
+
+# Add all generations of the system profile to the menu, in reverse
+# (most recent to least recent) order.
+for generation in $(
+    (cd /nix/var/nix/profiles && ls -d system-*-link) \
+    | sed 's/system-\([0-9]\+\)-link/\1/' \
+    | sort -n -r); do
+    echo $generation
+    addEntry "NixOS - Configuration $generation" \
+        /nix/var/nix/profiles/system-$generation-link
+done
+
+
+cp $tmp $target

test/installer.sh

@@ -19,7 +19,7 @@ targetDevice="$1"
 nixExpr="$2"
 
 if test -z "$targetDevice" -o -z "$nixExpr"; then
-    echo "syntax: installer.sh <targetDevice> <nixExpr>"
+    echo "Syntax: installer.sh <targetDevice> <nixExpr>"
     exit 1
 fi
 

test/system-configuration.nix

@@ -28,9 +28,17 @@ rec {
     inherit (pkgs) grub coreutils gnused gnugrep diffutils;
     inherit grubDevice;
     inherit bootStage2;
+    inherit grubMenuBuilder;
     kernel = pkgs.kernel + "/vmlinuz";
     initrd = initialRamdisk + "/initrd";
   };
 
 
+  grubMenuBuilder = pkgs.genericSubstituter {
+    src = ./grub-menu-builder.sh;
+    isExecutable = true;
+    inherit (pkgs) bash;
+  };
+
+
 }

test/system-configuration.sh

@@ -6,9 +6,6 @@ ln -s $kernel $out/kernel
 ln -s $grub $out/grub
 
 cat > $out/menu.lst << GRUBEND
-# Automatically generated.  DO NOT EDIT THIS FILE!
-default=0
-timeout=5
 title NixOS
         kernel $kernel selinux=0 apm=on acpi=on
         initrd $initrd
@@ -21,8 +18,8 @@ cat > $out/bin/switch-to-configuration <<EOF
 set -e
 export PATH=$coreutils/bin:$gnused/bin:$gnugrep/bin:$diffutils/bin
 if test -n "$grubDevice"; then
+    $grubMenuBuilder $out
     $grub/sbin/grub-install "$grubDevice" --no-floppy --recheck
-    cp -f $out/menu.lst /boot/grub/menu.lst
     ln -sf $bootStage2 /init # !!! fix?
 fi
 EOF