107 lines
2.7 KiB
Bash
107 lines
2.7 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 "$1"; then
|
|
echo "Syntax: generations-dir-builder.sh <DEFAULT-CONFIG>"
|
|
exit 1
|
|
fi
|
|
|
|
echo "updating the boot generations directory..."
|
|
|
|
mkdir -p /boot
|
|
|
|
rm -Rf /boot/system* || true
|
|
|
|
target=/boot/grub/menu.lst
|
|
tmp=$target.tmp
|
|
|
|
# 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="$1"
|
|
local dst="/boot/kernels/$(cleanName $src)"
|
|
# 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=$dst
|
|
}
|
|
|
|
|
|
# Copy its kernel and initrd to /boot/kernels.
|
|
addEntry() {
|
|
local path="$1"
|
|
local generation="$2"
|
|
local outdir=/boot/system-$generation
|
|
|
|
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 -n "@copyKernels@"; then
|
|
copyToKernelsDir $kernel; kernel=$result
|
|
copyToKernelsDir $initrd; initrd=$result
|
|
fi
|
|
|
|
mkdir -p $outdir
|
|
ln -sf $(readlink -f $path) $outdir/system
|
|
ln -sf $(readlink -f $path/init) $outdir/init
|
|
ln -sf $initrd $outdir/initrd
|
|
ln -sf $kernel $outdir/kernel
|
|
|
|
if test $(readlink -f "$path") = "$default"; then
|
|
cp "$kernel" /boot/nixos-kernel
|
|
cp "$initrd" /boot/nixos-initrd
|
|
cp "$(readlink -f "$path/init")" /boot/nixos-init
|
|
|
|
mkdir -p /boot/default
|
|
# ln -sfT: overrides target even if it exists.
|
|
ln -sfT $(readlink -f $path) /boot/default/system
|
|
ln -sfT $(readlink -f $path/init) /boot/default/init
|
|
ln -sfT $initrd /boot/default/initrd
|
|
ln -sfT $kernel /boot/default/kernel
|
|
fi
|
|
}
|
|
|
|
if test -n "@copyKernels@"; then
|
|
mkdir -p /boot/kernels
|
|
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
|
|
link=/nix/var/nix/profiles/system-$generation-link
|
|
addEntry $link $generation
|
|
done
|
|
|
|
# Remove obsolete files from /boot/kernels.
|
|
for fn in /boot/kernels/*; do
|
|
if ! test "${filesCopied[$fn]}" = 1; then
|
|
rm -vf -- "$fn"
|
|
fi
|
|
done
|