feat: moved impermanence import

systems/eris/config/filesystem.nix

@@ -1,42 +1,45 @@
 {
   flake,
   config,
+  lib,
   ...
 }:
 let
-  inherit (flake.config.machines.devices) ceres;
-  ceresSecrets = config.sops.secrets."network/server".path;
-
-  sambaDrives = [
-    "samba0"
-  ];
-
-  sambaFolders = [
-    "storage"
-  ];
-
-  sambaMounts = sambaDrive: folder: {
-    name = "${ceres.${sambaDrive}.mount}/${folder}";
-    value = {
-      device = "${ceres.${sambaDrive}.device}/${folder}";
-      fsType = "cifs";
-      options = ceres.${sambaDrive}.options ++ [
-        "credentials=${ceresSecrets}"
-      ];
-    };
-  };
-
+  inherit (flake.config.people) user0;
+  rootDevice = "/dev/disk/by-label/root";
+  bootDevice = "/dev/disk/by-label/BOOT";
 in
-
 {
   fileSystems = {
     "/" = {
-      device = "/dev/disk/by-uuid/df2d42e7-e91c-4525-a8d9-80aa0897b1be";
-      fsType = "ext4";
+      device = rootDevice;
+      fsType = "btrfs";
+      options = [
+        "subvol=root"
+      ];
+    };
+    "/nix" = {
+      device = rootDevice;
+      fsType = "btrfs";
+      options = [
+        "subvol=nix"
+      ];
+    };
+    "/persist" = {
+      device = rootDevice;
+      fsType = "btrfs";
+      neededForBoot = true;
+      options = [
+        "subvol=persist"
+      ];
     };
     "/boot" = {
-      device = "/dev/disk/by-uuid/B645-7527";
+      device = bootDevice;
       fsType = "vfat";
+      options = [
+        "fmask=0077"
+        "dmask=0077"
+      ];
     };
     "/mnt/storage" = {
       device = "/dev/md0";
@@ -47,23 +50,91 @@ in
         "x-systemd.device-timeout=10"
       ];
     };
-  }
-  // (builtins.listToAttrs (
-    builtins.concatMap (drive: map (folder: sambaMounts drive folder) sambaFolders) sambaDrives
-  ));
+    "/etc/ssh" = {
+      neededForBoot = true;
+    };
+  };
+  environment.persistence."/persist" = {
+    directories = [
+      "/var/cache"
+      "/var/lib"
+      {
+        directory = "/etc/ssh";
+        mode = "u=rwx,g=rx,o=rx";
+        user = "root";
+      }
+    ];
+    hideMounts = true;
+    users.${user0} = {
+      directories = [
+        ".cache"
+        ".config"
+        ".local/share/direnv"
+        ".local/state/nix"
+        {
+          directory = ".ssh";
+          mode = "u=rwx,g=,o=";
+        }
+      ];
+    };
+  };
+  boot = {
+    initrd.postResumeCommands = lib.mkAfter ''
+      mkdir /btrfs_tmp
+      mount -o subvolid=5 ${rootDevice} /btrfs_tmp
 
-  swapDevices = [
-    { device = "/dev/disk/by-uuid/9a2e032d-8627-49cf-8f3f-8fdf2be5fed4"; }
-  ];
+      if [[ -e /btrfs_tmp/root ]]; then
+          mkdir -p /btrfs_tmp/old_roots
+          timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
+          mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
+      fi
 
-  boot.swraid.enable = true;
-  boot.swraid.mdadmConf = ''
-    ARRAY /dev/md0 metadata=1.2 name=eris:storage UUID=64659038:a939a18d:8cdc0f3f:97171a50
-  '';
+      delete_subvolume_recursively() {
+          IFS=$'\n'
+          for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
+              delete_subvolume_recursively "/btrfs_tmp/$i"
+          done
+          btrfs subvolume delete "$1"
+      }
 
+      for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
+          delete_subvolume_recursively "$i"
+      done
+
+      btrfs subvolume create /btrfs_tmp/root
+      umount /btrfs_tmp
+    '';
+    swraid.enable = true;
+    mdadmConf = ''
+      ARRAY /dev/md0 metadata=1.2 name=eris:storage UUID=64659038:a939a18d:8cdc0f3f:97171a50
+    '';
+  };
   systemd.tmpfiles.rules = [
+    "Z ${config.home-manager.users.${user0}.home.homeDirectory} 0755 ${user0} users -"
     "d /mnt/storage 2775 root root -"
   ];
-
   services.udisks2.enable = true;
 }
+
+# sudo mount /dev/disk/by-label/root /mnt
+# sudo btrfs subvolume create /mnt/persist
+# sudo btsfs subvolume create /mnt/rootDevice
+# sudo btrfs subvolume create /mnt/nix
+# sudo umount /mnt
+
+# sudo mount -o subvol=root /dev/disk/by-label/root /mnt
+
+# sudo mount -o subvol=nix /dev/disk/by-label/root /mnt/nix
+# sudo mount -o subvol=persist /dev/disk/by-label/root /mnt/persist
+
+# sudo mount /dev/disk/by-label/BOOT /mnt/boot
+
+# sudo nixos-generate-config --root /mnt
+
+# sudo nixos-install --root /mnt
+
+# sudo nixos-enter --root /mnt
+# nixos-rebuild boot
+# exit
+
+# sudo reboot