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path: root/system/filesystemLayouts/filesystemLayouts.nix
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{
  config,
  lib,
  ...
}:
with lib; let
  cfg = config.system.filesystemLayout;
in {
  options = {
    cfg.enable = mkEnableOption (mdDoc "filesysetemLayout");
    cfg.mainDisk = mkOption {
      type = lib.types.path;
      example = literalExpression "/dev/disk/by-uuid/0442cb6d-f13a-4635-b487-fa76189774c5";
      description = lib.mdDoc "Path to the main disk";
    };
    cfg.efiDisk = mkOption {
      type = lib.types.path;
      example = literalExpression "/dev/disk/by-uuid/5143-6136";
      description = lib.mdDoc "Path to the main disk";
    };
  };

  config = mkif cfg.enabled {
    fileSystems = {
      "/" = {
        device = "none";
        fsType = "tmpfs";
        options = ["defaults" "size=2G" "mode=755"];
      };
      "/nix" = {
        device = cfg.mainDisk;
        fsType = "btrfs";
        options = ["subvol=@nix" "compress-force=zstd:9"];
      };
      "/boot" = {
        device = cfg.efiDisk;
        fsType = "vfat";
      };

      "/srv/home" = {
        device = cfg.mainDisk;
        fsType = "btrfs";
        options = ["subvol=@home" "compress-force=zstd:9"];
      };
      "/srv/nixos-config" = {
        device = cfg.mainDisk;
        fsType = "btrfs";
        options = ["subvol=@nixos-config" "compress-force=zstd:9"];
      };

      "/etc/nixos" = {
        device = "/srv/nix-config";
        options = ["bind"];
      };
      "/home" = {
        device = "/srv/home";
        options = ["bind"];
      };
    };
    swapDevices = [];
  };
}