Price Hiller
f79bdeca5a
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78 lines
2.2 KiB
Nix
78 lines
2.2 KiB
Nix
{ modulesPath, pkgs, ... }:
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{
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imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
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boot = {
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loader = {
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systemd-boot.enable = true;
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efi.canTouchEfiVariables = true;
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};
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kernelModules = [ "kvm-intel" ];
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kernelParams = [ "audit=1" ];
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extraModulePackages = [ ];
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initrd = {
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availableKernelModules = [
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"xhci_pci"
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"thunderbolt"
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"vmd"
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"nvme"
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"usbhid"
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"rtsx_pci_sdmmc"
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];
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systemd = {
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enable = true;
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initrdBin = [
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pkgs.libuuid
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pkgs.gawk
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];
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services.rollback = {
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description = "Rollback btrfs root subvolume";
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wantedBy = [ "initrd.target" ];
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before = [ "sysroot.mount" ];
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after = [ "initrd-root-device.target" ];
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unitConfig.DefaultDependencies = "no";
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serviceConfig.Type = "oneshot";
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script = ''
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mkdir -p /mnt
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DISK_LABEL="NixOS-Primary"
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FOUND_DISK=0
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ATTEMPTS=50
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printf "Attempting to find disk with label '%s'\n" "$DISK_LABEL"
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while ((ATTEMPTS > 0)); do
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if findfs LABEL="$DISK_LABEL"; then
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FOUND_DISK=1
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printf "Found disk!\n"
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break;
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fi
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((ATTEMPTS--))
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sleep .1
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printf "Remaining disk discovery attempts: %s\n" "$ATTEMPTS"
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done
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if (( FOUND_DISK == 0 )); then
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printf "Discovery of disk with label '%s' failed! Cannot rollback!\n" "$DISK_LABEL"
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exit 1
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fi
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mount -t btrfs -o subvol=/ $(findfs LABEL="$DISK_LABEL") /mnt
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btrfs subvolume list -to /mnt/root \
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| awk 'NR>2 { printf $4"\n" }' \
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| while read subvol; do
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printf "Removing Subvolume: %s\n" "$subvol";
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btrfs subvolume delete "/mnt/$subvol"
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done
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printf "Removing /root subvolume\n"
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btrfs subvolume delete /mnt/root
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printf "Restoring base /root subvolume\n"
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btrfs subvolume snapshot /mnt/root-base /mnt/root
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umount /mnt
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'';
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};
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};
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};
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};
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}
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