200 lines
5.4 KiB
Bash
200 lines
5.4 KiB
Bash
#! @shell@
|
|
|
|
# - [mount target device] <- currently disabled
|
|
# - make Nix store etc.
|
|
# - copy closure of Nix to target device
|
|
# - register validity
|
|
# - with a chroot to the target device:
|
|
# * do a nix-pull
|
|
# * nix-env -p /nix/var/nix/profiles/system -i <nix-expr for the configuration>
|
|
# * run the activation script of the configuration (also installs Grub)
|
|
|
|
set -e
|
|
|
|
if test -z "$mountPoint"; then
|
|
mountPoint=/mnt
|
|
fi
|
|
|
|
if test -z "$NIXOS"; then
|
|
NIXOS=/etc/nixos/nixos
|
|
fi
|
|
|
|
# NIXOS_CONFIG is interpreted relative to $mountPoint.
|
|
if test -z "$NIXOS_CONFIG"; then
|
|
NIXOS_CONFIG=/etc/nixos/configuration.nix
|
|
fi
|
|
|
|
if ! test -e "$mountPoint"; then
|
|
echo "mount point $mountPoint doesn't exist"
|
|
exit 1
|
|
fi
|
|
|
|
if ! grep -F -q " $mountPoint " /proc/mounts; then
|
|
echo "$mountPoint doesn't appear to be a mount point"
|
|
exit 1
|
|
fi
|
|
|
|
if ! test -e "$NIXOS"; then
|
|
echo "NixOS source directory $NIXOS doesn't exist"
|
|
exit 1
|
|
fi
|
|
|
|
if ! test -e "$mountPoint/$NIXOS_CONFIG"; then
|
|
echo "configuration file $mountPoint/$NIXOS_CONFIG doesn't exist"
|
|
exit 1
|
|
fi
|
|
|
|
|
|
NIXOS=$(readlink -f "$NIXOS")
|
|
|
|
|
|
# Enable networking in the chroot.
|
|
mkdir -m 0755 -p $mountPoint/etc
|
|
touch /etc/resolv.conf
|
|
cp -f /etc/resolv.conf $mountPoint/etc/
|
|
rm -f $mountPoint/etc/hosts
|
|
cat /etc/hosts > $mountPoint/etc/hosts
|
|
rm -f $mountPoint/etc/nsswitch.conf
|
|
cat /etc/nsswitch.conf > $mountPoint/etc/nsswitch.conf
|
|
|
|
# Mount some stuff in the target root directory.
|
|
mkdir -m 0755 -p $mountPoint/dev $mountPoint/proc $mountPoint/sys $mountPoint/mnt
|
|
mount --bind /dev $mountPoint/dev
|
|
mount --bind /proc $mountPoint/proc
|
|
mount --bind /sys $mountPoint/sys
|
|
mount --rbind / $mountPoint/mnt
|
|
|
|
# Note: probably umount -l is enough. It umounts recursive mount points having been mounted by --rbind!
|
|
# Probably umountUnder can be removed ?
|
|
umountUnder() {
|
|
local dir="$1"
|
|
for i in $(grep -F " $dir" /proc/mounts \
|
|
| @perl@/bin/perl -e 'while (<>) { /^\S+\s+(\S+)\s+/; print "$1\n"; }' \
|
|
| sort -r);
|
|
do
|
|
umount $i || true
|
|
done
|
|
}
|
|
|
|
cleanup() {
|
|
umountUnder $mountPoint/mnt
|
|
umountUnder $mountPoint/dev
|
|
umountUnder $mountPoint/proc
|
|
umountUnder $mountPoint/sys
|
|
}
|
|
|
|
trap "cleanup" EXIT
|
|
|
|
mkdir -m 01777 -p $mountPoint/tmp
|
|
mkdir -m 0755 -p $mountPoint/var
|
|
|
|
|
|
# Create the necessary Nix directories on the target device, if they
|
|
# don't already exist.
|
|
mkdir -m 0755 -p \
|
|
$mountPoint/nix/var/nix/gcroots \
|
|
$mountPoint/nix/var/nix/temproots \
|
|
$mountPoint/nix/var/nix/manifests \
|
|
$mountPoint/nix/var/nix/userpool \
|
|
$mountPoint/nix/var/nix/profiles \
|
|
$mountPoint/nix/var/nix/db \
|
|
$mountPoint/nix/var/log/nix/drvs
|
|
|
|
mkdir -m 1777 -p \
|
|
$mountPoint/nix/store \
|
|
|
|
|
|
# Get the store paths to copy from the references graph.
|
|
storePaths=$(@perl@/bin/perl @pathsFromGraph@ @nixClosure@)
|
|
|
|
|
|
# Copy Nix to the Nix store on the target device.
|
|
echo "copying Nix to $mountPoint...."
|
|
for i in $storePaths; do
|
|
echo " $i"
|
|
rsync -a $i $mountPoint/nix/store/
|
|
done
|
|
|
|
|
|
# We don't have locale-archive in the chroot, so clear $LANG.
|
|
export LANG=
|
|
|
|
|
|
# Register the paths in the Nix closure as valid. This is necessary
|
|
# to prevent them from being deleted the first time we install
|
|
# something. (I.e., Nix will see that, e.g., the glibc path is not
|
|
# valid, delete it to get it out of the way, but as a result nothing
|
|
# will work anymore.)
|
|
chroot $mountPoint @nix@/bin/nix-store --register-validity < @nixClosure@
|
|
|
|
|
|
# Create the required /bin/sh symlink; otherwise lots of things
|
|
# (notably the system() function) won't work.
|
|
mkdir -m 0755 -p $mountPoint/bin
|
|
# !!! assuming that @shell@ is in the closure
|
|
ln -sf @shell@ $mountPoint/bin/sh
|
|
|
|
|
|
# Make the build below copy paths from the CD if possible. Note that
|
|
# /mnt in the chroot is the root of the CD.
|
|
export NIX_OTHER_STORES=/mnt/nix:$NIX_OTHER_STORES
|
|
|
|
|
|
# Do a nix-pull to speed up building.
|
|
if test -n "@nixpkgsURL@" -a ${NIXOS_PULL:-1} != 0; then
|
|
chroot $mountPoint @nix@/bin/nix-pull @nixpkgsURL@/MANIFEST || true
|
|
fi
|
|
|
|
if test -n "$NIXOS_PREPARE_CHROOT_ONLY"; then
|
|
echo "User requested only to prepare chroot. Exiting."
|
|
exit 0;
|
|
fi
|
|
|
|
# Build the specified Nix expression in the target store and install
|
|
# it into the system configuration profile.
|
|
echo "building the system configuration..."
|
|
NIXPKGS=/mnt/etc/nixos/nixpkgs chroot $mountPoint @nix@/bin/nix-env \
|
|
-p /nix/var/nix/profiles/system \
|
|
-f "/mnt$NIXOS" \
|
|
--set -A system
|
|
|
|
|
|
# Make a backup of the old NixOS/Nixpkgs sources.
|
|
echo "copying NixOS/Nixpkgs sources to /etc/nixos...."
|
|
|
|
backupTimestamp=$(date "+%Y%m%d%H%M%S")
|
|
|
|
targetNixos=$mountPoint/etc/nixos/nixos
|
|
if test -e $targetNixos; then
|
|
mv $targetNixos $targetNixos.backup-$backupTimestamp
|
|
fi
|
|
|
|
targetNixpkgs=$mountPoint/etc/nixos/nixpkgs
|
|
if test -e $targetNixpkgs; then
|
|
mv $targetNixpkgs $targetNixpkgs.backup-$backupTimestamp
|
|
fi
|
|
|
|
|
|
# Copy the NixOS/Nixpkgs sources to the target.
|
|
cp -prd $NIXOS $targetNixos
|
|
if test -e /etc/nixos/nixpkgs; then
|
|
cp -prd /etc/nixos/nixpkgs $targetNixpkgs
|
|
fi
|
|
|
|
|
|
# Grub needs an mtab.
|
|
ln -sfn /proc/mounts $mountPoint/etc/mtab
|
|
|
|
|
|
# Mark the target as a NixOS installation, otherwise
|
|
# switch-to-configuration will chicken out.
|
|
touch $mountPoint/etc/NIXOS
|
|
|
|
|
|
# Switch to the new system configuration. This will install Grub with
|
|
# a menu default pointing at the kernel/initrd/etc of the new
|
|
# configuration.
|
|
echo "finalising the installation..."
|
|
NIXOS_INSTALL_GRUB=1 chroot $mountPoint \
|
|
/nix/var/nix/profiles/system/bin/switch-to-configuration boot
|