nixpkgs/nixos/tests/grow-partition.nix
Will Fancher f8ed5f30c0 nixos/filesystems: Remove default = "auto" from fsType
NixOS has traditionally enabled the `ext` family of file systems by
default. Originally, when switching to systemd initrd, we wanted to
transition to making this explicit so that initrds could be made
without `ext`. The problem is that anyone with `fsType = "auto";` for
an `ext` file system in initrd will fail to boot, which is not really
an acceptable regression as we switch to systemd initrd by default.

By removing `default = "auto"` from `fsType`, we rule out the vast
majority of these regressions as eval errors, since most users of
`fsType = "auto"` for ext file systems are using it because of the
default value.

In hindsight, this is probably what #225352 was really about.
2026-04-05 19:06:28 -04:00

96 lines
2.6 KiB
Nix

{ lib, ... }:
let
rootFslabel = "external";
rootFsDevice = "/dev/disk/by-label/${rootFslabel}";
externalModule =
partitionTableType:
{
config,
lib,
pkgs,
...
}:
{
virtualisation.directBoot.enable = false;
virtualisation.mountHostNixStore = false;
virtualisation.useEFIBoot = partitionTableType == "efi";
# This stops the qemu-vm module from overriding the fileSystems option
# with virtualisation.fileSystems.
virtualisation.fileSystems = lib.mkForce { };
boot.loader.grub.enable = true;
boot.loader.grub.efiSupport = partitionTableType == "efi";
boot.loader.grub.efiInstallAsRemovable = partitionTableType == "efi";
boot.loader.grub.device = if partitionTableType == "efi" then "nodev" else "/dev/vda";
boot.growPartition = true;
fileSystems = {
"/".device = rootFsDevice;
"/".fsType = "ext4";
};
# Needed for installing bootloader
system.switch.enable = true;
system.build.diskImage = import ../lib/make-disk-image.nix {
inherit config lib pkgs;
label = rootFslabel;
inherit partitionTableType;
format = "raw";
bootSize = "128M";
additionalSpace = "0M";
copyChannel = false;
};
};
in
{
name = "grow-partition";
meta.maintainers = with lib.maintainers; [ arianvp ];
nodes = {
efi = externalModule "efi";
legacy = externalModule "legacy";
legacyGPT = externalModule "legacy+gpt";
hybrid = externalModule "hybrid";
};
testScript =
{ nodes, ... }:
lib.concatLines (
lib.mapAttrsToList (name: node: ''
import os
import subprocess
import tempfile
import shutil
tmp_disk_image = tempfile.NamedTemporaryFile()
shutil.copyfile("${node.system.build.diskImage}/nixos.img", tmp_disk_image.name)
subprocess.run([
"${node.virtualisation.qemu.package}/bin/qemu-img",
"resize",
"-f",
"raw",
tmp_disk_image.name,
"+32M",
])
# Set NIX_DISK_IMAGE so that the qemu script finds the right disk image.
os.environ['NIX_DISK_IMAGE'] = tmp_disk_image.name
${name}.wait_for_unit("growpart.service")
systemd_growpart_logs = ${name}.succeed("journalctl --boot --unit growpart.service")
assert "CHANGED" in systemd_growpart_logs
${name}.succeed("systemctl restart growpart.service")
systemd_growpart_logs = ${name}.succeed("journalctl --boot --unit growpart.service")
assert "NOCHANGE" in systemd_growpart_logs
'') nodes
);
}