nixpkgs/installer/grub-menu-builder.sh
Marc Weber ecff4f580c * Synced with trunk @ 15368
svn path=/nixos/branches/modular-nixos/; revision=15608
2009-05-15 06:43:02 +00:00

153 lines
3.9 KiB
Bash

#! @bash@/bin/sh -e
shopt -s nullglob
export PATH=/empty
for i in @path@; do PATH=$PATH:$i/bin; done
default=$1
if test -z "$1"; then
echo "Syntax: grub-menu-builder.sh <DEFAULT-CONFIG>"
exit 1
fi
bootMount="@bootMount@"
if test -z "$bootMount"; then bootMount=/boot; fi
target=/boot/grub/menu.lst
tmp=$target.tmp
cat > $tmp << GRUBEND
# Automatically generated. DO NOT EDIT THIS FILE!
default 0
timeout 5
GRUBEND
if test -n "@grubSplashImage@"; then
splashLocation=@grubSplashImage@
# !!! image in /nix/store doesn't seem to work
#if test -n "@copyKernels@"; then
cp -f $splashLocation /boot/background.xpm.gz
splashLocation="$bootMount/background.xpm.gz"
#fi
echo "splashimage $splashLocation" >> $tmp
fi
configurationCounter=0
configurationLimit="@configurationLimit@"
numAlienEntries=`cat <<EOF | egrep '^[[:space:]]*title' | wc -l
@extraGrubEntries@
EOF`
if test $((configurationLimit+numAlienEntries)) -gt 190; then
configurationLimit=$((190-numAlienEntries));
fi
addEntry() {
local name="$1"
local path="$2"
local shortSuffix="$3"
configurationCounter=$((configurationCounter + 1))
if test $configurationCounter -gt @configurationLimit@ ; then
return
fi;
if ! test -e $path/kernel -a -e $path/initrd; then
return
fi
local kernel=$(readlink -f $path/kernel)
local initrd=$(readlink -f $path/initrd)
if test "$path" = "$default"; then
cp "$kernel" /boot/nixos-kernel
cp "$initrd" /boot/nixos-initrd
cp "$(readlink -f "$path/init")" /boot/nixos-init
cat > /boot/nixos-grub-config <<EOF
title Emergency boot
kernel ${bootMount:-/boot}/nixos-kernel systemConfig=$(readlink -f "$path") init=/boot/nixos-init $(cat "$path/kernel-params")
initrd ${bootMount:-/boot}/nixos-initrd
EOF
fi
if test -n "@copyKernels@"; then
local kernel2=/boot/kernels/$(echo $kernel | sed 's^/^-^g')
if ! test -e $kernel2; then
cp $kernel $kernel2
fi
kernel=$kernel2
local initrd2=/boot/kernels/$(echo $initrd | sed 's^/^-^g')
if ! test -e $initrd2; then
cp $initrd $initrd2
fi
initrd=$initrd2
if test -n "$bootMount"; then
kernel=$(echo $kernel2 | sed -e "s^/boot^$bootMount^")
initrd=$(echo $initrd2 | sed -e "s^/boot^$bootMount^")
fi
fi
local confName=$(if test -e $path/configuration-name; then
cat $path/configuration-name;
fi);
if test -n "$confName" ; then
name="$confName $3";
fi;
cat >> $tmp << GRUBEND
title $name
kernel $kernel systemConfig=$(readlink -f $path) init=$(readlink -f $path/init) $(cat $path/kernel-params)
initrd $initrd
GRUBEND
}
rm -rf /boot/kernels
if test -n "@copyKernels@"; then
mkdir -p /boot/kernels
fi
# Additional entries specified verbatim by the configuration.
extraGrubEntries=`cat <<EOF
@extraGrubEntries@
EOF`
if test -n "@extraGrubEntriesBeforeNixos@"; then
echo "$extraGrubEntries" >> $tmp
fi
addEntry "NixOS - Default" $default ""
if test -z "@extraGrubEntriesBeforeNixos@"; then
echo "$extraGrubEntries" >> $tmp
fi
# 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 /nix/var/nix/profiles && ls -d system-*-link) \
| sed 's/system-\([0-9]\+\)-link/\1/' \
| sort -n -r); do
echo $generation
link=/nix/var/nix/profiles/system-$generation-link
date=$(stat --printf="%y\n" $link | sed 's/\..*//')
kernelVersion=$(cd $(dirname $(readlink -f $link/kernel))/lib/modules && echo *)
addEntry "NixOS - Configuration $generation ($date - $kernelVersion)" $link "$generation ($date)"
done
# Atomically update /boot/grub/menu.lst. !!! should do an fsync()
# here on $tmp, especially on ext4.
mv $tmp $target