mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-23 06:01:15 +00:00
120 lines
3.5 KiB
Nix
120 lines
3.5 KiB
Nix
{ pkgs
|
|
, lib
|
|
|
|
, # The NixOS configuration to be installed onto the disk image.
|
|
config
|
|
|
|
, # The size of the disk, in megabytes.
|
|
diskSize
|
|
|
|
, # Whether the disk should be partitioned (with a single partition
|
|
# containing the root filesystem) or contain the root filesystem
|
|
# directly.
|
|
partitioned ? true
|
|
|
|
, # The root file system type.
|
|
fsType ? "ext4"
|
|
|
|
, # The initial NixOS configuration file to be copied to
|
|
# /etc/nixos/configuration.nix.
|
|
configFile ? null
|
|
|
|
, # Shell code executed after the VM has finished.
|
|
postVM ? ""
|
|
|
|
, name ? "nixos-disk-image"
|
|
|
|
, format ? "raw"
|
|
}:
|
|
|
|
with lib;
|
|
|
|
pkgs.vmTools.runInLinuxVM (
|
|
pkgs.runCommand name
|
|
{ preVM =
|
|
''
|
|
mkdir $out
|
|
diskImage=$out/nixos.${if format == "qcow2" then "qcow2" else "img"}
|
|
${pkgs.vmTools.qemu}/bin/qemu-img create -f ${format} $diskImage "${toString diskSize}M"
|
|
mv closure xchg/
|
|
'';
|
|
buildInputs = [ pkgs.utillinux pkgs.perl pkgs.e2fsprogs pkgs.parted ];
|
|
exportReferencesGraph =
|
|
[ "closure" config.system.build.toplevel ];
|
|
inherit postVM;
|
|
memSize = 1024;
|
|
}
|
|
''
|
|
${if partitioned then ''
|
|
# Create a single / partition.
|
|
parted /dev/vda mklabel msdos
|
|
parted /dev/vda -- mkpart primary ext2 1M -1s
|
|
. /sys/class/block/vda1/uevent
|
|
mknod /dev/vda1 b $MAJOR $MINOR
|
|
rootDisk=/dev/vda1
|
|
'' else ''
|
|
rootDisk=/dev/vda
|
|
''}
|
|
|
|
# Create an empty filesystem and mount it.
|
|
mkfs.${fsType} -L nixos $rootDisk
|
|
${optionalString (fsType == "ext4") ''
|
|
tune2fs -c 0 -i 0 $rootDisk
|
|
''}
|
|
mkdir /mnt
|
|
mount $rootDisk /mnt
|
|
|
|
# The initrd expects these directories to exist.
|
|
mkdir /mnt/dev /mnt/proc /mnt/sys
|
|
|
|
mount -o bind /proc /mnt/proc
|
|
mount -o bind /dev /mnt/dev
|
|
mount -o bind /sys /mnt/sys
|
|
|
|
# Copy all paths in the closure to the filesystem.
|
|
storePaths=$(perl ${pkgs.pathsFromGraph} /tmp/xchg/closure)
|
|
|
|
mkdir -p /mnt/nix/store
|
|
echo "copying everything (will take a while)..."
|
|
set -f
|
|
cp -prd $storePaths /mnt/nix/store/
|
|
|
|
# Register the paths in the Nix database.
|
|
printRegistration=1 perl ${pkgs.pathsFromGraph} /tmp/xchg/closure | \
|
|
chroot /mnt ${config.nix.package.out}/bin/nix-store --load-db --option build-users-group ""
|
|
|
|
# Add missing size/hash fields to the database. FIXME:
|
|
# exportReferencesGraph should provide these directly.
|
|
chroot /mnt ${config.nix.package.out}/bin/nix-store --verify --check-contents
|
|
|
|
# Create the system profile to allow nixos-rebuild to work.
|
|
chroot /mnt ${config.nix.package.out}/bin/nix-env --option build-users-group "" \
|
|
-p /nix/var/nix/profiles/system --set ${config.system.build.toplevel}
|
|
|
|
# `nixos-rebuild' requires an /etc/NIXOS.
|
|
mkdir -p /mnt/etc
|
|
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
|
|
|
|
# Install a configuration.nix.
|
|
mkdir -p /mnt/etc/nixos
|
|
${optionalString (configFile != null) ''
|
|
cp ${configFile} /mnt/etc/nixos/configuration.nix
|
|
''}
|
|
|
|
# Generate the GRUB menu.
|
|
ln -s vda /dev/xvda
|
|
ln -s vda /dev/sda
|
|
chroot /mnt ${config.system.build.toplevel}/bin/switch-to-configuration boot
|
|
|
|
umount /mnt/proc /mnt/dev /mnt/sys
|
|
umount /mnt
|
|
|
|
# Do a fsck to make sure resize2fs works.
|
|
fsck.${fsType} -f -y $rootDisk
|
|
''
|
|
)
|