#! @shell@ # Syntax: installer.sh # (e.g., installer.sh /dev/hda1 ./my-machine.nix) # - mount target device # - make Nix store etc. # - copy closure of rescue env to target device # - register validity # - start the "target" installer in a chroot to the target device # * do a nix-pull # * nix-env -p system-profile -i # * run hook scripts provided by packages in the configuration? # - install/update grub set -e targetDevice="$1" nixExpr="$2" if test -z "$targetDevice" -o -z "$nixExpr"; then echo "Syntax: installer.sh " exit 1 fi nixExpr=$(readlink -f "$nixExpr") # Make sure that the target device isn't mounted. umount "$targetDevice" 2> /dev/null || true # Check it. fsck -n "$targetDevice" # Mount the target device. mountPoint=/tmp/inst-mnt mkdir -p $mountPoint mount "$targetDevice" $mountPoint mkdir -m 0755 -p $mountPoint/dev $mountPoint/proc $mountPoint/sys $mountPoint/mnt mount --rbind / $mountPoint/mnt mount --bind /dev $mountPoint/dev mount --bind /proc $mountPoint/proc mount --bind /sys $mountPoint/sys cleanup() { for i in $(grep -F "$mountPoint" /proc/mounts \ | perl -e 'while (<>) { /^\S+\s+(\S+)\s+/; print "$1\n"; }' \ | sort -r); do umount $i done } 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 \ $mountPoint/nix/store \ # Get the store paths to copy from the references graph. storePaths=$(@shell@ @pathsFromGraph@ @nixClosure@) # Copy Nix to the Nix store on the target device. echo "copying Nix to $targetDevice...." for i in $storePaths; do echo " $i" rsync -a $i $mountPoint/nix/store/ done # 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 ln -sf $(type -tp sh) $mountPoint/bin/sh # Enable networking in the chroot. mkdir -m 0755 -p $mountPoint/etc cp /etc/resolv.conf $mountPoint/etc/ # Do a nix-pull to speed up building. if test -n "@nixpkgsURL@"; then chroot $mountPoint @nix@/bin/nix-pull @nixpkgsURL@/MANIFEST fi # Build the specified Nix expression in the target store and install # it into the system configuration profile. #rm -rf $mountPoint/scratch #mkdir $mountPoint/scratch #curl $nixpkgsURL/nixexprs.tar.bz2 | tar xj -C $mountPoint/scratch #nixpkgsName=$(cd $mountPoint/scratch && ls) chroot $mountPoint @nix@/bin/nix-env \ -p /nix/var/nix/profiles/system \ -f "/mnt/$nixExpr" -i --set system # Grub needs a mtab. echo "$targetDevice / somefs rw 0 0" > $mountPoint/etc/mtab # 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