work

modules/common/host-spec.nix

@@ -0,0 +1,101 @@
+# Specifications For Differentiating Hosts
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: {
+  options.hostSpec = {
+    # Data variables that don't dictate configuration settings
+    username = lib.mkOption {
+      type = lib.types.str;
+      description = "The username of the host";
+    };
+    hostName = lib.mkOption {
+      type = lib.types.str;
+      description = "The hostname of the host";
+    };
+    email = lib.mkOption {
+      type = lib.types.attrsOf lib.types.str;
+      description = "The email of the user";
+    };
+    networking = lib.mkOption {
+      default = {};
+      type = lib.types.attrsOf lib.types.anything;
+      description = "An attribute set of networking information";
+    };
+    wifi = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Used to indicate if a host has wifi";
+    };
+    domain = lib.mkOption {
+      type = lib.types.str;
+      description = "The domain of the host";
+    };
+    userFullName = lib.mkOption {
+      type = lib.types.str;
+      description = "The full name of the user";
+    };
+    handle = lib.mkOption {
+      type = lib.types.str;
+      description = "The handle of the user (eg: github user)";
+    };
+    home = lib.mkOption {
+      type = lib.types.str;
+      description = "The home directory of the user";
+      default = let
+        user = config.hostSpec.username;
+      in
+        if pkgs.stdenv.isLinux
+        then "/home/${user}"
+        else "/Users/${user}";
+    };
+    persistFolder = lib.mkOption {
+      type = lib.types.str;
+      description = "The folder to persist data if impermenance is enabled";
+      default = "";
+    };
+
+    # Configuration Settings
+    isMinimal = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Used to indicate a minimal host";
+    };
+    isMobile = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Used to indicate a mobile host";
+    };
+    isProduction = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Used to indicate a production host";
+    };
+    isServer = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Used to indicate a server host";
+    };
+    # Sometimes we can't use pkgs.stdenv.isLinux due to infinite recursion
+    isDarwin = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Used to indicate a host that is darwin";
+    };
+  };
+
+  config = {
+    assertions = let
+      # We import these options to HM and NixOS, so need to not fail on HM
+      isImpermanent =
+        config ? "system" && config.system ? "impermanence" && config.system.impermanence.enable;
+    in [
+      {
+        assertion = !isImpermanent || (isImpermanent && !("${config.hostSpec.persistFolder}" == ""));
+        message = "config.system.impermanence.enable is true but no persistFolder path is provided";
+      }
+    ];
+  };
+}