32 lines
1,011 B
Nix
32 lines
1,011 B
Nix
{ ... }: {
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boot.initrd.systemd.services.rollback = {
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description = "Rollback root subvolume to blank state";
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wantedBy = [ "initrd.target" ];
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after = [ "dev-vg0-system.device" ];
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before = [ "sysroot.mount" ];
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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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mount -o subvol=/ /dev/vg0/system /mnt
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btrfs subvolume list -o /mnt/@root | cut -f9 -d' ' | while read subvolume; do
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echo "deleting /$subvolume subvolume..."
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btrfs subvolume delete "/mnt/$subvolume"
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done &&
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echo "deleting /root subvolume..." &&
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btrfs subvolume delete "/mnt/@root"
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echo "restoring blank /root subvolume..."
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btrfs subvolume snapshot "/mnt/@root-blank" "/mnt/@root"
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echo "deleting /home subvolume..."
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btrfs subvolume delete "/mnt/@home"
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echo "restoring blank /home subvolume..."
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btrfs subvolume snapshot "/mnt/@home-blank" "/mnt/@home"
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umount /mnt
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'';
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};
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}
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