Merge pull request 'Migrate Importer module' (#3854) from migrate-importer into main

Reviewed-on: https://git.clan.lol/clan/clan-core/pulls/3854
Reviewed-by: Luis Hebendanz <consulting@qube.email>

checks/mycelium/default.nix

@@ -47,7 +47,7 @@ nixosLib.runTest (
       server.succeed("systemctl status mycelium")
 
       # Check that mycelium is listening on its default port
-      server.succeed("${pkgs.iproute2}/bin/ss -tulpn | grep -q 'mycelium'")
+      server.wait_until_succeeds("${pkgs.iproute2}/bin/ss -tulpn | grep -q 'mycelium'", 10)
     '';
   }
 )

clanServices/importer/README.md

@@ -0,0 +1,26 @@
+The importer module allows users to configure importing modules in a flexible and structured way.
+It exposes the `extraModules` functionality of the inventory, without any added configuration.
+
+## Usage:
+
+```nix
+inventory.instances = {
+
+  zone1 = {
+    module.name = "@clan/importer";
+    roles.default.tags = [ "zone1" ];
+    roles.default.extraModules = [ "modules/zone1.nix" ];
+  };
+
+  base = {
+    module.name = "@clan/importer";
+    roles.default.tags = [ "all" ];
+    roles.default.extraModules = [ "modules/base.nix" ];
+  };
+
+};
+```
+
+This will import the module `modules/base.nix` to all machines that have the `all` tag,
+which by default is every machine managed by the clan.
+And also import for all machines tagged with `zone1` the module at `modules/zone1.nix`.

clanServices/importer/default.nix

@@ -0,0 +1,10 @@
+{ ... }:
+{
+  _class = "clan.service";
+  manifest.name = "clan-core/importer";
+  manifest.description = "Convenient, structured module imports for hosts.";
+  manifest.categories = [ "Utility" ];
+  manifest.readme = builtins.readFile ./README.md;
+
+  roles.default = { };
+}

clanServices/importer/flake-module.nix

@@ -0,0 +1,6 @@
+{ lib, ... }:
+{
+  clan.modules = {
+    importer = lib.modules.importApply ./default.nix { };
+  };
+}