-configuration_file: { pkgs ? import <nixpkgs> {}, system ? builtins.currentSystem, myEnv, ... }:
-let
- config = (import <nixpkgs/nixos/lib/eval-config.nix> {
- inherit system;
- modules = [ {
- myEnv = myEnv;
- imports = [ configuration_file ];
-
- # We want our template image to be as small as possible, but the deployed image should be able to be
- # of any size. Hence we resize on the first boot.
- systemd.services.resize-main-fs = {
- wantedBy = [ "multi-user.target" ];
- serviceConfig.Type = "oneshot";
- script =
- ''
- # Resize main partition to fill whole disk
- echo ", +" | ${pkgs.utillinux}/bin/sfdisk /dev/vda --no-reread -N 1
- ${pkgs.parted}/bin/partprobe
- # Resize filesystem
- ${pkgs.e2fsprogs}/bin/resize2fs /dev/vda1
- '';
- };
- } ];
- }).config;
-in pkgs.vmTools.runInLinuxVM (
- pkgs.runCommand "nixos-base-image"
- {
- memSize = 768;
- preVM =
- ''
- mkdir $out
- diskImage=image.qcow2
- ${pkgs.vmTools.qemu}/bin/qemu-img create -f qcow2 $diskImage 2G
- mv closure xchg/
- '';
- postVM =
- ''
- echo compressing VM image...
- ${pkgs.vmTools.qemu}/bin/qemu-img convert -c $diskImage -O qcow2 $out/nixos.qcow2
- '';
- buildInputs = [ pkgs.utillinux pkgs.perl pkgs.parted pkgs.e2fsprogs ];
- exportReferencesGraph =
- [ "closure" config.system.build.toplevel ];
- }
- ''
- # Create the partition
- parted /dev/vda mklabel msdos
- parted /dev/vda -- mkpart primary ext4 1M -1s
-
- # Format the partition
- mkfs.ext4 -L nixos /dev/vda1
- mkdir /mnt
- mount /dev/vda1 /mnt
-
- for dir in dev proc sys; do
- mkdir /mnt/$dir
- mount --bind /$dir /mnt/$dir
- done
-
- storePaths=$(perl ${pkgs.pathsFromGraph} /tmp/xchg/closure)
- echo filling Nix store...
- mkdir -p /mnt/nix/store
- set -f
- cp -prd $storePaths /mnt/nix/store
- # The permissions will be set up incorrectly if the host machine is not running NixOS
- chown -R 0:30000 /mnt/nix/store
-
- mkdir -p /mnt/etc/nix
- echo 'build-users-group = ' > /mnt/etc/nix/nix.conf
-
- # Register the paths in the Nix database.
- export USER=root
- printRegistration=1 perl ${pkgs.pathsFromGraph} /tmp/xchg/closure | \
- chroot /mnt ${config.nix.package.out}/bin/nix-store --load-db
-
- # Create the system profile to allow nixos-rebuild to work.
- chroot /mnt ${config.nix.package.out}/bin/nix-env \
- -p /nix/var/nix/profiles/system --set ${config.system.build.toplevel}
-
- # `nixos-rebuild' requires an /etc/NIXOS.
- mkdir -p /mnt/etc/nixos
- touch /mnt/etc/NIXOS
-
- # `switch-to-configuration' requires a /bin/sh
- mkdir -p /mnt/bin
- ln -s ${config.system.build.binsh}/bin/sh /mnt/bin/sh
-
- # Generate the GRUB menu.
- chroot /mnt ${config.system.build.toplevel}/bin/switch-to-configuration boot
-
- umount /mnt/{proc,dev,sys}
- umount /mnt
- ''
-)