52 lines
1.6 KiB
Nix
52 lines
1.6 KiB
Nix
{ lib, username, ... }:
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{
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fileSystems."/persist".neededForBoot = true;
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environment.persistence."/persist/system" = {
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hideMounts = true;
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directories = [
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"/etc/nixos"
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"/var/log"
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"/var/lib/bluetooth"
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"/var/lib/nixos"
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"/var/lib/systemd/coredump"
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"/etc/NetworkManager/system-connections"
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{ directory = "/var/lib/colord"; user = "colord"; group = "colord"; mode = "u=rwx,g=rx,o="; }
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];
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files = [
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"/etc/machine-id"
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{ file = "/var/keys/secret_file"; parentDirectory = { mode = "u=rwx,g=,o="; }; }
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];
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};
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systemd.tmpfiles.rules = [
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"d /persist/home/ 0777 root root -" # /persist/home created, owned by root
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"d /persist/home/${username} 0700 ${username} users -" # /persist/home/<user> created, owned by that user
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#"d /persist/nixos-config 0700 ${username} users -"
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];
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programs.fuse.userAllowOther = true;
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boot.initrd.postDeviceCommands = lib.mkAfter ''
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mkdir /btrfs_tmp
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mount /dev/root_vg/root /btrfs_tmp
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if [[ -e /btrfs_tmp/root ]]; then
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mkdir -p /btrfs_tmp/old_roots
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timestamp=$(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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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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}
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