nixpkgs/nixos/tests/installer.nix
aszlig fa0b60f59a
nixos/tests/installer: Add lndir to extraDeps
In commit 17dd7bcd89 the systemd unit
generator now uses lndir instead of "ln -s", so we need to have lndir
available in the Nix store for the installer tests to be able to build
the units and thus the whole system.

This should fix the installer tests, although I have only tested it with
the "simple" subtest.

Signed-off-by: aszlig <aszlig@nix.build>
Cc: @jtojnar, @xeji, @edolstra
2018-05-15 18:51:53 +02:00

668 lines
24 KiB
Nix

{ system ? builtins.currentSystem }:
with import ../lib/testing.nix { inherit system; };
with pkgs.lib;
let
# The configuration to install.
makeConfig = { bootLoader, grubVersion, grubDevice, grubIdentifier, grubUseEfi
, extraConfig, forceGrubReinstallCount ? 0
}:
pkgs.writeText "configuration.nix" ''
{ config, lib, pkgs, modulesPath, ... }:
{ imports =
[ ./hardware-configuration.nix
<nixpkgs/nixos/modules/testing/test-instrumentation.nix>
];
# To ensure that we can rebuild the grub configuration on the nixos-rebuild
system.extraDependencies = with pkgs; [ stdenvNoCC ];
${optionalString (bootLoader == "grub") ''
boot.loader.grub.version = ${toString grubVersion};
${optionalString (grubVersion == 1) ''
boot.loader.grub.splashImage = null;
''}
boot.loader.grub.extraConfig = "serial; terminal_output.serial";
${if grubUseEfi then ''
boot.loader.grub.device = "nodev";
boot.loader.grub.efiSupport = true;
boot.loader.grub.efiInstallAsRemovable = true; # XXX: needed for OVMF?
'' else ''
boot.loader.grub.device = "${grubDevice}";
boot.loader.grub.fsIdentifier = "${grubIdentifier}";
''}
boot.loader.grub.configurationLimit = 100 + ${toString forceGrubReinstallCount};
''}
${optionalString (bootLoader == "systemd-boot") ''
boot.loader.systemd-boot.enable = true;
''}
users.extraUsers.alice = {
isNormalUser = true;
home = "/home/alice";
description = "Alice Foobar";
};
hardware.enableAllFirmware = lib.mkForce false;
${replaceChars ["\n"] ["\n "] extraConfig}
}
'';
channelContents = [ pkgs.rlwrap ];
# The test script boots a NixOS VM, installs NixOS on an empty hard
# disk, and then reboot from the hard disk. It's parameterized with
# a test script fragment `createPartitions', which must create
# partitions and filesystems.
testScriptFun = { bootLoader, createPartitions, grubVersion, grubDevice, grubUseEfi
, grubIdentifier, preBootCommands, extraConfig
}:
let
iface = if grubVersion == 1 then "ide" else "virtio";
isEfi = bootLoader == "systemd-boot" || (bootLoader == "grub" && grubUseEfi);
# FIXME don't duplicate the -enable-kvm etc. flags here yet again!
qemuFlags =
(if system == "x86_64-linux" then "-m 768 " else "-m 512 ") +
(optionalString (system == "x86_64-linux") "-cpu kvm64 ") +
(optionalString (system == "aarch64-linux") "-enable-kvm -machine virt,gic-version=host -cpu host ");
hdFlags = ''hda => "vm-state-machine/machine.qcow2", hdaInterface => "${iface}", ''
+ optionalString isEfi (if pkgs.stdenv.isAarch64
then ''bios => "${pkgs.OVMF.fd}/FV/QEMU_EFI.fd", ''
else ''bios => "${pkgs.OVMF.fd}/FV/OVMF.fd", '');
in if !isEfi && !(pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64) then
throw "Non-EFI boot methods are only supported on i686 / x86_64"
else ''
$machine->start;
# Make sure that we get a login prompt etc.
$machine->succeed("echo hello");
#$machine->waitForUnit('getty@tty2');
#$machine->waitForUnit("rogue");
$machine->waitForUnit("nixos-manual");
# Wait for hard disks to appear in /dev
$machine->succeed("udevadm settle");
# Partition the disk.
${createPartitions}
# Create the NixOS configuration.
$machine->succeed("nixos-generate-config --root /mnt");
$machine->succeed("cat /mnt/etc/nixos/hardware-configuration.nix >&2");
$machine->copyFileFromHost(
"${ makeConfig { inherit bootLoader grubVersion grubDevice grubIdentifier grubUseEfi extraConfig; } }",
"/mnt/etc/nixos/configuration.nix");
# Perform the installation.
$machine->succeed("nixos-install < /dev/null >&2");
# Do it again to make sure it's idempotent.
$machine->succeed("nixos-install < /dev/null >&2");
$machine->succeed("umount /mnt/boot || true");
$machine->succeed("umount /mnt");
$machine->succeed("sync");
$machine->shutdown;
# Now see if we can boot the installation.
$machine = createMachine({ ${hdFlags} qemuFlags => "${qemuFlags}", name => "boot-after-install" });
# For example to enter LUKS passphrase.
${preBootCommands}
# Did /boot get mounted?
$machine->waitForUnit("local-fs.target");
${if bootLoader == "grub" then
''$machine->succeed("test -e /boot/grub");''
else
''$machine->succeed("test -e /boot/loader/loader.conf");''
}
# Check whether /root has correct permissions.
$machine->succeed("stat -c '%a' /root") =~ /700/ or die;
# Did the swap device get activated?
# uncomment once https://bugs.freedesktop.org/show_bug.cgi?id=86930 is resolved
$machine->waitForUnit("swap.target");
$machine->succeed("cat /proc/swaps | grep -q /dev");
# Check that the store is in good shape
$machine->succeed("nix-store --verify --check-contents >&2");
# Check whether the channel works.
$machine->succeed("nix-env -iA nixos.procps >&2");
$machine->succeed("type -tP ps | tee /dev/stderr") =~ /.nix-profile/
or die "nix-env failed";
# Check that the daemon works, and that non-root users can run builds (this will build a new profile generation through the daemon)
$machine->succeed("su alice -l -c 'nix-env -iA nixos.procps' >&2");
# We need a writable Nix store on next boot.
$machine->copyFileFromHost(
"${ makeConfig { inherit bootLoader grubVersion grubDevice grubIdentifier grubUseEfi extraConfig; forceGrubReinstallCount = 1; } }",
"/etc/nixos/configuration.nix");
# Check whether nixos-rebuild works.
$machine->succeed("nixos-rebuild switch >&2");
# Test nixos-option.
$machine->succeed("nixos-option boot.initrd.kernelModules | grep virtio_console");
$machine->succeed("nixos-option boot.initrd.kernelModules | grep 'List of modules'");
$machine->succeed("nixos-option boot.initrd.kernelModules | grep qemu-guest.nix");
$machine->shutdown;
# Check whether a writable store build works
$machine = createMachine({ ${hdFlags} qemuFlags => "${qemuFlags}", name => "rebuild-switch" });
${preBootCommands}
$machine->waitForUnit("multi-user.target");
$machine->copyFileFromHost(
"${ makeConfig { inherit bootLoader grubVersion grubDevice grubIdentifier grubUseEfi extraConfig; forceGrubReinstallCount = 2; } }",
"/etc/nixos/configuration.nix");
$machine->succeed("nixos-rebuild boot >&2");
$machine->shutdown;
# And just to be sure, check that the machine still boots after
# "nixos-rebuild switch".
$machine = createMachine({ ${hdFlags} qemuFlags => "${qemuFlags}", "boot-after-rebuild-switch" });
${preBootCommands}
$machine->waitForUnit("network.target");
$machine->shutdown;
'';
makeInstallerTest = name:
{ createPartitions, preBootCommands ? "", extraConfig ? ""
, extraInstallerConfig ? {}
, bootLoader ? "grub" # either "grub" or "systemd-boot"
, grubVersion ? 2, grubDevice ? "/dev/vda", grubIdentifier ? "uuid", grubUseEfi ? false
, enableOCR ? false, meta ? {}
}:
makeTest {
inherit enableOCR;
name = "installer-" + name;
meta = with pkgs.stdenv.lib.maintainers; {
# put global maintainers here, individuals go into makeInstallerTest fkt call
maintainers = [ wkennington ] ++ (meta.maintainers or []);
};
nodes = {
# The configuration of the machine used to run "nixos-install".
machine =
{ config, lib, pkgs, ... }:
{ imports =
[ ../modules/profiles/installation-device.nix
../modules/profiles/base.nix
extraInstallerConfig
];
virtualisation.diskSize = 8 * 1024;
virtualisation.memorySize = 1024;
# Use a small /dev/vdb as the root disk for the
# installer. This ensures the target disk (/dev/vda) is
# the same during and after installation.
virtualisation.emptyDiskImages = [ 512 ];
virtualisation.bootDevice =
if grubVersion == 1 then "/dev/sdb" else "/dev/vdb";
virtualisation.qemu.diskInterface =
if grubVersion == 1 then "scsi" else "virtio";
boot.loader.systemd-boot.enable = mkIf (bootLoader == "systemd-boot") true;
hardware.enableAllFirmware = mkForce false;
# The test cannot access the network, so any packages we
# need must be included in the VM.
system.extraDependencies = with pkgs;
[ sudo
libxml2.bin
libxslt.bin
docbook5
docbook5_xsl
unionfs-fuse
ntp
nixos-artwork.wallpapers.gnome-dark
perlPackages.XMLLibXML
perlPackages.ListCompare
xorg.lndir
# add curl so that rather than seeing the test attempt to download
# curl's tarball, we see what it's trying to download
curl
]
++ optional (bootLoader == "grub" && grubVersion == 1) pkgs.grub
++ optionals (bootLoader == "grub" && grubVersion == 2) [ pkgs.grub2 pkgs.grub2_efi ];
nix.binaryCaches = mkForce [ ];
nix.extraOptions =
''
hashed-mirrors =
connect-timeout = 1
'';
};
};
testScript = testScriptFun {
inherit bootLoader createPartitions preBootCommands
grubVersion grubDevice grubIdentifier grubUseEfi extraConfig;
};
};
in {
# !!! `parted mkpart' seems to silently create overlapping partitions.
# The (almost) simplest partitioning scheme: a swap partition and
# one big filesystem partition.
simple = makeInstallerTest "simple"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/vda mklabel msdos",
"parted --script /dev/vda -- mkpart primary linux-swap 1M 1024M",
"parted --script /dev/vda -- mkpart primary ext2 1024M -1s",
"udevadm settle",
"mkswap /dev/vda1 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/vda2",
"mount LABEL=nixos /mnt",
);
'';
};
# Simple GPT/UEFI configuration using systemd-boot with 3 partitions: ESP, swap & root filesystem
simpleUefiSystemdBoot = makeInstallerTest "simpleUefiSystemdBoot"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/vda mklabel gpt",
"parted --script /dev/vda -- mkpart ESP fat32 1M 50MiB", # /boot
"parted --script /dev/vda -- set 1 boot on",
"parted --script /dev/vda -- mkpart primary linux-swap 50MiB 1024MiB",
"parted --script /dev/vda -- mkpart primary ext2 1024MiB -1MiB", # /
"udevadm settle",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/vda3",
"mount LABEL=nixos /mnt",
"mkfs.vfat -n BOOT /dev/vda1",
"mkdir -p /mnt/boot",
"mount LABEL=BOOT /mnt/boot",
);
'';
bootLoader = "systemd-boot";
};
simpleUefiGrub = makeInstallerTest "simpleUefiGrub"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/vda mklabel gpt",
"parted --script /dev/vda -- mkpart ESP fat32 1M 50MiB", # /boot
"parted --script /dev/vda -- set 1 boot on",
"parted --script /dev/vda -- mkpart primary linux-swap 50MiB 1024MiB",
"parted --script /dev/vda -- mkpart primary ext2 1024MiB -1MiB", # /
"udevadm settle",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/vda3",
"mount LABEL=nixos /mnt",
"mkfs.vfat -n BOOT /dev/vda1",
"mkdir -p /mnt/boot",
"mount LABEL=BOOT /mnt/boot",
);
'';
bootLoader = "grub";
grubUseEfi = true;
};
# Same as the previous, but now with a separate /boot partition.
separateBoot = makeInstallerTest "separateBoot"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/vda mklabel msdos",
"parted --script /dev/vda -- mkpart primary ext2 1M 50MB", # /boot
"parted --script /dev/vda -- mkpart primary linux-swap 50MB 1024M",
"parted --script /dev/vda -- mkpart primary ext2 1024M -1s", # /
"udevadm settle",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/vda3",
"mount LABEL=nixos /mnt",
"mkfs.ext3 -L boot /dev/vda1",
"mkdir -p /mnt/boot",
"mount LABEL=boot /mnt/boot",
);
'';
};
# Same as the previous, but with fat32 /boot.
separateBootFat = makeInstallerTest "separateBootFat"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/vda mklabel msdos",
"parted --script /dev/vda -- mkpart primary ext2 1M 50MB", # /boot
"parted --script /dev/vda -- mkpart primary linux-swap 50MB 1024M",
"parted --script /dev/vda -- mkpart primary ext2 1024M -1s", # /
"udevadm settle",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/vda3",
"mount LABEL=nixos /mnt",
"mkfs.vfat -n BOOT /dev/vda1",
"mkdir -p /mnt/boot",
"mount LABEL=BOOT /mnt/boot",
);
'';
};
# zfs on / with swap
zfsroot = makeInstallerTest "zfs-root"
{
extraInstallerConfig = {
boot.supportedFilesystems = [ "zfs" ];
};
extraConfig = ''
boot.supportedFilesystems = [ "zfs" ];
# Using by-uuid overrides the default of by-id, and is unique
# to the qemu disks, as they don't produce by-id paths for
# some reason.
boot.zfs.devNodes = "/dev/disk/by-uuid/";
networking.hostId = "00000000";
'';
createPartitions =
''
$machine->succeed(
"parted --script /dev/vda mklabel msdos",
"parted --script /dev/vda -- mkpart primary linux-swap 1M 1024M",
"parted --script /dev/vda -- mkpart primary 1024M -1s",
"udevadm settle",
"mkswap /dev/vda1 -L swap",
"swapon -L swap",
"zpool create rpool /dev/vda2",
"zfs create -o mountpoint=legacy rpool/root",
"mount -t zfs rpool/root /mnt",
"udevadm settle"
);
'';
};
# Create two physical LVM partitions combined into one volume group
# that contains the logical swap and root partitions.
lvm = makeInstallerTest "lvm"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/vda mklabel msdos",
"parted --script /dev/vda -- mkpart primary 1M 2048M", # PV1
"parted --script /dev/vda -- set 1 lvm on",
"parted --script /dev/vda -- mkpart primary 2048M -1s", # PV2
"parted --script /dev/vda -- set 2 lvm on",
"udevadm settle",
"pvcreate /dev/vda1 /dev/vda2",
"vgcreate MyVolGroup /dev/vda1 /dev/vda2",
"lvcreate --size 1G --name swap MyVolGroup",
"lvcreate --size 2G --name nixos MyVolGroup",
"mkswap -f /dev/MyVolGroup/swap -L swap",
"swapon -L swap",
"mkfs.xfs -L nixos /dev/MyVolGroup/nixos",
"mount LABEL=nixos /mnt",
);
'';
};
# Boot off an encrypted root partition
luksroot = makeInstallerTest "luksroot"
{ createPartitions = ''
$machine->succeed(
"parted --script /dev/vda mklabel msdos",
"parted --script /dev/vda -- mkpart primary ext2 1M 50MB", # /boot
"parted --script /dev/vda -- mkpart primary linux-swap 50M 1024M",
"parted --script /dev/vda -- mkpart primary 1024M -1s", # LUKS
"udevadm settle",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"modprobe dm_mod dm_crypt",
"echo -n supersecret | cryptsetup luksFormat -q /dev/vda3 -",
"echo -n supersecret | cryptsetup luksOpen --key-file - /dev/vda3 cryptroot",
"mkfs.ext3 -L nixos /dev/mapper/cryptroot",
"mount LABEL=nixos /mnt",
"mkfs.ext3 -L boot /dev/vda1",
"mkdir -p /mnt/boot",
"mount LABEL=boot /mnt/boot",
);
'';
extraConfig = ''
boot.kernelParams = lib.mkAfter [ "console=tty0" ];
'';
enableOCR = true;
preBootCommands = ''
$machine->start;
$machine->waitForText(qr/Enter passphrase/);
$machine->sendChars("supersecret\n");
'';
};
# Test whether opening encrypted filesystem with keyfile
# Checks for regression of missing cryptsetup, when no luks device without
# keyfile is configured
filesystemEncryptedWithKeyfile = makeInstallerTest "filesystemEncryptedWithKeyfile"
{ createPartitions = ''
$machine->succeed(
"parted --script /dev/vda mklabel msdos",
"parted --script /dev/vda -- mkpart primary ext2 1M 50MB", # /boot
"parted --script /dev/vda -- mkpart primary linux-swap 50M 1024M",
"parted --script /dev/vda -- mkpart primary 1024M 1280M", # LUKS with keyfile
"parted --script /dev/vda -- mkpart primary 1280M -1s",
"udevadm settle",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/vda4",
"mount LABEL=nixos /mnt",
"mkfs.ext3 -L boot /dev/vda1",
"mkdir -p /mnt/boot",
"mount LABEL=boot /mnt/boot",
"modprobe dm_mod dm_crypt",
"echo -n supersecret > /mnt/keyfile",
"cryptsetup luksFormat -q /dev/vda3 --key-file /mnt/keyfile",
"cryptsetup luksOpen --key-file /mnt/keyfile /dev/vda3 crypt",
"mkfs.ext3 -L test /dev/mapper/crypt",
"cryptsetup luksClose crypt",
"mkdir -p /mnt/test"
);
'';
extraConfig = ''
fileSystems."/test" =
{ device = "/dev/disk/by-label/test";
fsType = "ext3";
encrypted.enable = true;
encrypted.blkDev = "/dev/vda3";
encrypted.label = "crypt";
encrypted.keyFile = "/mnt-root/keyfile";
};
'';
};
swraid = makeInstallerTest "swraid"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/vda --"
. " mklabel msdos"
. " mkpart primary ext2 1M 100MB" # /boot
. " mkpart extended 100M -1s"
. " mkpart logical 102M 2102M" # md0 (root), first device
. " mkpart logical 2103M 4103M" # md0 (root), second device
. " mkpart logical 4104M 4360M" # md1 (swap), first device
. " mkpart logical 4361M 4617M", # md1 (swap), second device
"udevadm settle",
"ls -l /dev/vda* >&2",
"cat /proc/partitions >&2",
"mdadm --create --force /dev/md0 --metadata 1.2 --level=raid1 --raid-devices=2 /dev/vda5 /dev/vda6",
"mdadm --create --force /dev/md1 --metadata 1.2 --level=raid1 --raid-devices=2 /dev/vda7 /dev/vda8",
"udevadm settle",
"mkswap -f /dev/md1 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/md0",
"mount LABEL=nixos /mnt",
"mkfs.ext3 -L boot /dev/vda1",
"mkdir /mnt/boot",
"mount LABEL=boot /mnt/boot",
"udevadm settle",
);
'';
preBootCommands = ''
$machine->start;
$machine->fail("dmesg | grep 'immediate safe mode'");
'';
};
# Test a basic install using GRUB 1.
grub1 = makeInstallerTest "grub1"
{ createPartitions =
''
$machine->succeed(
"parted --script /dev/sda mklabel msdos",
"parted --script /dev/sda -- mkpart primary linux-swap 1M 1024M",
"parted --script /dev/sda -- mkpart primary ext2 1024M -1s",
"udevadm settle",
"mkswap /dev/sda1 -L swap",
"swapon -L swap",
"mkfs.ext3 -L nixos /dev/sda2",
"mount LABEL=nixos /mnt",
);
'';
grubVersion = 1;
grubDevice = "/dev/sda";
};
# Test using labels to identify volumes in grub
simpleLabels = makeInstallerTest "simpleLabels" {
createPartitions = ''
$machine->succeed(
"sgdisk -Z /dev/vda",
"sgdisk -n 1:0:+1M -n 2:0:+1G -N 3 -t 1:ef02 -t 2:8200 -t 3:8300 -c 3:root /dev/vda",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.ext4 -L root /dev/vda3",
"mount LABEL=root /mnt",
);
'';
grubIdentifier = "label";
};
# Test using the provided disk name within grub
# TODO: Fix udev so the symlinks are unneeded in /dev/disks
simpleProvided = makeInstallerTest "simpleProvided" {
createPartitions = ''
my $UUID = "\$(blkid -s UUID -o value /dev/vda2)";
$machine->succeed(
"sgdisk -Z /dev/vda",
"sgdisk -n 1:0:+1M -n 2:0:+100M -n 3:0:+1G -N 4 -t 1:ef02 -t 2:8300 -t 3:8200 -t 4:8300 -c 2:boot -c 4:root /dev/vda",
"mkswap /dev/vda3 -L swap",
"swapon -L swap",
"mkfs.ext4 -L boot /dev/vda2",
"mkfs.ext4 -L root /dev/vda4",
);
$machine->execute("ln -s ../../vda2 /dev/disk/by-uuid/$UUID");
$machine->execute("ln -s ../../vda4 /dev/disk/by-label/root");
$machine->succeed(
"mount /dev/disk/by-label/root /mnt",
"mkdir /mnt/boot",
"mount /dev/disk/by-uuid/$UUID /mnt/boot"
);
'';
grubIdentifier = "provided";
};
# Simple btrfs grub testing
btrfsSimple = makeInstallerTest "btrfsSimple" {
createPartitions = ''
$machine->succeed(
"sgdisk -Z /dev/vda",
"sgdisk -n 1:0:+1M -n 2:0:+1G -N 3 -t 1:ef02 -t 2:8200 -t 3:8300 -c 3:root /dev/vda",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.btrfs -L root /dev/vda3",
"mount LABEL=root /mnt",
);
'';
};
# Test to see if we can detect /boot and /nix on subvolumes
btrfsSubvols = makeInstallerTest "btrfsSubvols" {
createPartitions = ''
$machine->succeed(
"sgdisk -Z /dev/vda",
"sgdisk -n 1:0:+1M -n 2:0:+1G -N 3 -t 1:ef02 -t 2:8200 -t 3:8300 -c 3:root /dev/vda",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.btrfs -L root /dev/vda3",
"btrfs device scan",
"mount LABEL=root /mnt",
"btrfs subvol create /mnt/boot",
"btrfs subvol create /mnt/nixos",
"btrfs subvol create /mnt/nixos/default",
"umount /mnt",
"mount -o defaults,subvol=nixos/default LABEL=root /mnt",
"mkdir /mnt/boot",
"mount -o defaults,subvol=boot LABEL=root /mnt/boot",
);
'';
};
# Test to see if we can detect default and aux subvolumes correctly
btrfsSubvolDefault = makeInstallerTest "btrfsSubvolDefault" {
createPartitions = ''
$machine->succeed(
"sgdisk -Z /dev/vda",
"sgdisk -n 1:0:+1M -n 2:0:+1G -N 3 -t 1:ef02 -t 2:8200 -t 3:8300 -c 3:root /dev/vda",
"mkswap /dev/vda2 -L swap",
"swapon -L swap",
"mkfs.btrfs -L root /dev/vda3",
"btrfs device scan",
"mount LABEL=root /mnt",
"btrfs subvol create /mnt/badpath",
"btrfs subvol create /mnt/badpath/boot",
"btrfs subvol create /mnt/nixos",
"btrfs subvol set-default \$(btrfs subvol list /mnt | grep 'nixos' | awk '{print \$2}') /mnt",
"umount /mnt",
"mount -o defaults LABEL=root /mnt",
"mkdir -p /mnt/badpath/boot", # Help ensure the detection mechanism is actually looking up subvolumes
"mkdir /mnt/boot",
"mount -o defaults,subvol=badpath/boot LABEL=root /mnt/boot",
);
'';
};
}