62 lines
1.5 KiB
Nix
62 lines
1.5 KiB
Nix
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{ lib, config, ... }:
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let
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hostname = config.networking.hostName;
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in
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{
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imports = [
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./persist.nix
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];
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boot.initrd.postDeviceCommands = lib.mkAfter ''
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mkdir /btrfs_tmp
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mount /dev/nvme0n1p2 /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/$timestamp"
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fi
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delete_subvolume_recursively() {
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IFS=$'\n'
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for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
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delete_subvolume_recursively "/btrfs_tmp/$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 $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
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delete_subvolume_recursively "$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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fileSystems = {
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"/" = {
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device = "/dev/disk/by-label/${hostname}";
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fsType = "btrfs";
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options = [ "subvol=root" "compress=zstd" ];
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};
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"/nix" = {
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device = "/dev/disk/by-label/${hostname}";
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fsType = "btrfs";
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options = [ "subvol=nix" "compress=zstd" ];
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};
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"/persist" = {
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device = "/dev/disk/by-label/${hostname}";
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fsType = "btrfs";
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options = [ "subvol=persist" "compress=zstd" ];
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neededForBoot = true;
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};
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"/swap" = {
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device = "/dev/disk/by-label/${hostname}";
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fsType = "btrfs";
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options = [ "subvol=swap" "compress=zstd" ];
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};
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};
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}
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