topgrade: add module (#1924)

tests/modules/programs/topgrade/default.nix

@@ -0,0 +1 @@
+{ topgrade-settings = ./settings.nix; }

tests/modules/programs/topgrade/settings-expected.toml

@@ -0,0 +1,8 @@
+cleanup = true
+disable = ["sdkman", "flutter", "node", "nix", "home_manager"]
+remote_topgrade_path = "bin/topgrade"
+remote_topgrades = ["backup", "ci"]
+set_title = false
+
+[commands]
+"Purge unused APT packages" = "sudo apt autoremove"

tests/modules/programs/topgrade/settings.nix

@@ -0,0 +1,38 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  config = {
+    programs.topgrade = {
+      enable = true;
+
+      settings = mkMerge [
+        {
+          disable = [ "sdkman" "flutter" "node" "nix" "home_manager" ];
+
+          remote_topgrades = [ "backup" "ci" ];
+
+          remote_topgrade_path = "bin/topgrade";
+        }
+
+        {
+          set_title = false;
+          cleanup = true;
+
+          commands = { "Purge unused APT packages" = "sudo apt autoremove"; };
+        }
+      ];
+    };
+
+    nixpkgs.overlays = [
+      (self: super: { topgrade = pkgs.writeScriptBin "dummy-topgrade" ""; })
+    ];
+
+    nmt.script = ''
+      assertFileContent \
+        home-files/.config/topgrade.toml \
+        ${./settings-expected.toml}
+    '';
+  };
+}