57 lines
1.4 KiB
Nix
57 lines
1.4 KiB
Nix
{lib, ...}: {
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boot.initrd.postDeviceCommands = lib.mkAfter ''
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mkdir /btrfs_tmp
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mount /dev/mapper/crypted /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."/persist".neededForBoot = true;
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environment.persistence."/persist" = {
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hideMounts = true;
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directories = [
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{
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directory = "/etc/nixos";
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user = "admin";
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mode = "u=rwx,g=rx,o=rx";
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}
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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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];
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files = [
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"/etc/machine-id"
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{
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file = "/var/keys/secret_file";
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parentDirectory = {mode = "u=rwx,g=,o=";};
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}
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];
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users."admin" = {
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directories = [
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"this-will-persist"
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];
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};
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};
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}
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