wip podman on h001

common/programs/default.nix

@@ -1,4 +1,8 @@
-{ ... }:
+{ config, lib, ... }:
+let
+  ccfg = import ../config.nix;
+  cfg = config.${ccfg.custom_config_key}.programs;
+in
 {
   imports = [
     ./qFlipper.nix
@@ -7,6 +11,31 @@
     ./tailnet.nix
     ./ssh.nix
     ./docker.nix
+    ./podman.nix
     ./incus.nix
   ];
+  config = {
+    assertions = [
+      (
+        let
+          enabledVirtualizers = lib.filter (x: x.enabled) [
+            {
+              name = "docker";
+              enabled = cfg.docker.enable;
+            }
+            {
+              name = "podman";
+              enabled = cfg.podman.enable;
+            }
+          ];
+        in
+        {
+          assertion = lib.length enabledVirtualizers <= 1;
+          message =
+            "Only one virtualizer can be enabled at a time. Enabled: "
+            + lib.concatStringsSep ", " (map (x: x.name) enabledVirtualizers);
+        }
+      )
+    ];
+  };
 }