31 lines
1.1 KiB
Nix
31 lines
1.1 KiB
Nix
{ config, lib, ... }: {
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config = lib.mkIf config.disko.impermanent {
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boot.initrd.postDeviceCommands = lib.mkAfter ''
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mkdir /btrfs_tmp
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mount /dev/root_vg/root /btrfs_tmp
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if [[ -e /btrfs_tmp/root ]]; then
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mkdir -p /btrfs_tmp/old_roots
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timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%d_%H:%M:%S")
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mv /btrfs_tmp/root "btrfs_tmp/old_roots/$timestamp"
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fi
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deleteSubvolumeRecursively() {
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IFS=$'\n'
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for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
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deleteSubvolumeRecursively "/btrfs_tmp/$i"
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done;
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btrfs subvolume delete $1
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}
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for i in $(find /btrfs_tmp/old_roots -maxdepth 1 -mtime +30); do
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deleteSubvolumeRecursively "$i"
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done
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btrfs subvolume create /btrfs_tmp/root
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umount /btrfs_tmp
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'';
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};
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}
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