63e9ece771
This requires grub.conf to honour the saved_entry GRUB environment variable. svn path=/nixos/trunk/; revision=27807
292 lines
7.4 KiB
Bash
292 lines
7.4 KiB
Bash
#! @bash@/bin/sh -e
|
||
|
||
shopt -s nullglob
|
||
|
||
export PATH=/empty
|
||
for i in @path@; do PATH=$PATH:$i/bin; done
|
||
|
||
if test $# -ne 1; then
|
||
echo "Usage: grub-menu-builder.sh DEFAULT-CONFIG"
|
||
exit 1
|
||
fi
|
||
|
||
grubVersion="@version@"
|
||
defaultConfig="$1"
|
||
|
||
case "$grubVersion" in
|
||
1|2)
|
||
echo "updating GRUB $grubVersion menu..."
|
||
;;
|
||
*)
|
||
echo "Unsupported GRUB version \`$grubVersion'" >&2
|
||
echo "Supported versions are \`1' (GRUB Legacy) and \`2' (GRUB 1.9x)." >&2
|
||
exit 1
|
||
;;
|
||
esac
|
||
|
||
|
||
# Discover whether /boot is on the same filesystem as / and
|
||
# /nix/store. If not, then all kernels and initrds must be copied to
|
||
# /boot, and all paths in the GRUB config file must be relative to the
|
||
# root of the /boot filesystem. `$bootRoot' is the path to be
|
||
# prepended to paths under /boot.
|
||
if [ "$(stat -c '%D' /.)" != "$(stat -c '%D' /boot/.)" ]; then
|
||
bootRoot=
|
||
copyKernels=1
|
||
elif [ "$(stat -c '%D' /boot/.)" != "$(stat -c '%D' /nix/store/.)" ]; then
|
||
bootRoot=/boot
|
||
copyKernels=1
|
||
else
|
||
bootRoot=/boot
|
||
copyKernels="@copyKernels@" # user can override in the NixOS config
|
||
fi
|
||
|
||
|
||
prologue() {
|
||
case "$grubVersion" in
|
||
1)
|
||
cp -f "@splashImage@" /boot/background.xpm.gz
|
||
cat > "$1" << GRUBEND
|
||
# Automatically generated. DO NOT EDIT THIS FILE!
|
||
default @default@
|
||
timeout @timeout@
|
||
GRUBEND
|
||
if test -n "@splashImage@"; then
|
||
echo "splashimage $bootRoot/background.xpm.gz" >> "$1"
|
||
fi
|
||
;;
|
||
2)
|
||
cp -f @grub@/share/grub/unicode.pf2 /boot/grub/unicode.pf2
|
||
cat > "$1" <<EOF
|
||
# Automatically generated. DO NOT EDIT THIS FILE!
|
||
|
||
if [ -s \$prefix/grubenv ]; then
|
||
load_env
|
||
fi
|
||
|
||
# ‘grub-reboot’ sets a one-time saved entry, which we process here and
|
||
# then delete.
|
||
if [ "\${saved_entry}" ]; then
|
||
# The next line *has* to look exactly like this, otherwise KDM's
|
||
# reboot feature won't work properly with GRUB 2.
|
||
set default="\${saved_entry}"
|
||
set saved_entry=
|
||
set prev_saved_entry=
|
||
save_env saved_entry
|
||
save_env prev_saved_entry
|
||
set timeout=1
|
||
else
|
||
set default=@default@
|
||
set timeout=@timeout@
|
||
fi
|
||
|
||
if loadfont $bootRoot/grub/unicode.pf2; then
|
||
set gfxmode=640x480
|
||
insmod gfxterm
|
||
insmod vbe
|
||
terminal_output gfxterm
|
||
fi
|
||
EOF
|
||
if test -n "@splashImage@"; then
|
||
cp -f "@splashImage@" /boot/background.png
|
||
# FIXME: GRUB 1.97 doesn't resize the background image
|
||
# if it doesn't match the video resolution.
|
||
cat >> "$1" <<EOF
|
||
insmod png
|
||
if background_image $bootRoot/background.png; then
|
||
set color_normal=white/black
|
||
set color_highlight=black/white
|
||
else
|
||
set menu_color_normal=cyan/blue
|
||
set menu_color_highlight=white/blue
|
||
fi
|
||
EOF
|
||
fi
|
||
;;
|
||
esac
|
||
}
|
||
|
||
case "$grubVersion" in
|
||
1) target="/boot/grub/menu.lst";;
|
||
2) target="/boot/grub/grub.cfg";;
|
||
esac
|
||
|
||
tmp="$target.tmp"
|
||
|
||
prologue "$tmp"
|
||
|
||
|
||
configurationCounter=0
|
||
configurationLimit="@configurationLimit@"
|
||
numAlienEntries=`cat <<EOF | egrep '^[[:space:]]*title' | wc -l
|
||
@extraEntries@
|
||
EOF`
|
||
|
||
if test $((configurationLimit+numAlienEntries)) -gt 190; then
|
||
configurationLimit=$((190-numAlienEntries));
|
||
fi
|
||
|
||
|
||
# Convert a path to a file in the Nix store such as
|
||
# /nix/store/<hash>-<name>/file to <hash>-<name>-<file>.
|
||
cleanName() {
|
||
local path="$1"
|
||
echo "$path" | sed 's|^/nix/store/||' | sed 's|/|-|g'
|
||
}
|
||
|
||
|
||
# Copy a file from the Nix store to /boot/kernels.
|
||
declare -A filesCopied
|
||
|
||
copyToKernelsDir() {
|
||
local src="$1"
|
||
local p="kernels/$(cleanName $src)"
|
||
local dst="/boot/$p"
|
||
# Don't copy the file if $dst already exists. This means that we
|
||
# have to create $dst atomically to prevent partially copied
|
||
# kernels or initrd if this script is ever interrupted.
|
||
if ! test -e $dst; then
|
||
local dstTmp=$dst.tmp.$$
|
||
cp $src $dstTmp
|
||
mv $dstTmp $dst
|
||
fi
|
||
filesCopied[$dst]=1
|
||
result="$bootRoot/$p"
|
||
}
|
||
|
||
|
||
# Add an entry for a configuration to the Grub menu, and if
|
||
# appropriate, copy its kernel and initrd to /boot/kernels.
|
||
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 $path/initrd)
|
||
local xen=$([ -f $path/xen.gz ] && readlink -f $path/xen.gz)
|
||
|
||
if test "$path" = "$defaultConfig"; then
|
||
cp "$kernel" /boot/nixos-kernel
|
||
cp "$initrd" /boot/nixos-initrd
|
||
cp "$(readlink -f "$path/init")" /boot/nixos-init
|
||
case "$grubVersion" in
|
||
1)
|
||
cat > /boot/nixos-grub-config <<EOF
|
||
title Emergency boot
|
||
kernel $bootRoot/nixos-kernel systemConfig=$(readlink -f "$path") init=/boot/nixos-init $(cat "$path/kernel-params")
|
||
initrd $bootRoot/nixos-initrd
|
||
EOF
|
||
;;
|
||
2)
|
||
cat > /boot/nixos-grub-config <<EOF
|
||
menuentry "Emergency boot" {
|
||
linux $bootRoot/nixos-kernel systemConfig=$(readlink -f "$path") init=/boot/nixos-init $(cat "$path/kernel-params")
|
||
initrd $bootRoot/nixos-initrd
|
||
}
|
||
EOF
|
||
;;
|
||
esac
|
||
fi
|
||
|
||
if test -n "$copyKernels"; then
|
||
copyToKernelsDir $kernel; kernel=$result
|
||
copyToKernelsDir $initrd; initrd=$result
|
||
if [ -n "$xen" ]; then copyToKernelsDir $xen; xen=$result; fi
|
||
fi
|
||
|
||
local confName=$(cat $path/configuration-name 2>/dev/null || true)
|
||
if test -n "$confName"; then
|
||
name="$confName $3"
|
||
fi
|
||
|
||
local kernelParams="systemConfig=$(readlink -f $path) init=$(readlink -f $path/init) $(cat $path/kernel-params)"
|
||
local xenParams="$([ -n "$xen" ] && cat $path/xen-params)"
|
||
|
||
case "$grubVersion" in
|
||
1)
|
||
cat >> "$tmp" << GRUBEND
|
||
title $name
|
||
@extraPerEntryConfig@
|
||
${xen:+kernel $xen $xenParams}
|
||
$(if [ -z "$xen" ]; then echo kernel; else echo module; fi) $kernel $kernelParams
|
||
$(if [ -z "$xen" ]; then echo initrd; else echo module; fi) $initrd
|
||
GRUBEND
|
||
;;
|
||
2)
|
||
cat >> "$tmp" << GRUBEND
|
||
menuentry "$name" {
|
||
@extraPerEntryConfig@
|
||
${xen:+multiboot $xen $xenParams}
|
||
$(if [ -z "$xen" ]; then echo linux; else echo module; fi) $kernel $kernelParams
|
||
$(if [ -z "$xen" ]; then echo initrd; else echo module; fi) $initrd
|
||
}
|
||
GRUBEND
|
||
;;
|
||
esac
|
||
}
|
||
|
||
|
||
if test -n "$copyKernels"; then
|
||
mkdir -p /boot/kernels
|
||
fi
|
||
|
||
|
||
# Additional entries specified verbatim by the configuration.
|
||
extraEntries=`cat <<EOF
|
||
@extraEntries@
|
||
EOF`
|
||
|
||
|
||
cat >> $tmp <<EOF
|
||
@extraConfig@
|
||
EOF
|
||
|
||
if test -n "@extraEntriesBeforeNixOS@"; then
|
||
echo "$extraEntries" >> $tmp
|
||
fi
|
||
|
||
addEntry "NixOS - Default" $defaultConfig ""
|
||
|
||
if test -z "@extraEntriesBeforeNixOS@"; then
|
||
echo "$extraEntries" >> $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 $defaultConfig/fine-tune/* ) | sort -n); do
|
||
date=$(stat --printf="%y\n" $link | sed 's/\..*//')
|
||
addEntry "NixOS - variation" $link ""
|
||
done
|
||
|
||
for generation in $(
|
||
(cd /nix/var/nix/profiles && for i in system-*-link; do echo $i; done) \
|
||
| sed 's/system-\([0-9]\+\)-link/\1/' \
|
||
| sort -n -r); do
|
||
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 the GRUB configuration file.
|
||
mv $tmp $target
|
||
|
||
|
||
# Remove obsolete files from /boot/kernels.
|
||
for fn in /boot/kernels/*; do
|
||
if ! test "${filesCopied[$fn]}" = 1; then
|
||
rm -vf -- "$fn"
|
||
fi
|
||
done
|