initial attempt at using colmena to deploy nixos configurations

Can be used that way:
```
colmena exec --impure -v --on do-rproxy -- 'systemctl status nginx'
```

or
```
colmena --impure apply dry-activate --on synology-vm
```

2 files changed, 38 insertions, 0 deletions

diff --git a/flake/devshells.nix b/flake/devshells.nix
index 15c571b..3540bf5 100644
--- a/flake/devshells.nix
+++ b/flake/devshells.nix
@@ -52,6 +52,7 @@
             with pkgs;
             [
               nixos-rebuild
+              colmena
               git
               inputs.agenix.packages."${system}".default
             ]
diff --git a/flake/hosts.nix b/flake/hosts.nix
index 3ae840e..ff2b5a9 100644
--- a/flake/hosts.nix
+++ b/flake/hosts.nix
@@ -169,5 +169,42 @@ in
 {
   flake = {
     inherit nixosConfigurations darwinConfigurations;
+    colmena = {
+      meta = {
+        nixpkgs = import inputs.nixpkgs {
+          system = "x86_64-linux";
+          overlays = [
+            inputs.agenix.overlays.default
+            inputs.my-go-tools.overlays.default
+          ];
+        };
+
+        specialArgs = {
+          inherit inputs self;
+          adminUser = {
+            name = "fcuny";
+            uid = 1000;
+            userinfo = {
+              email = "franck@fcuny.net";
+              fullName = "Franck Cuny";
+            };
+          };
+        };
+      };
+
+      defaults =
+        {
+          ...
+        }:
+        {
+          imports = defaultModules ++ [
+            inputs.my-go-tools.nixosModules.default
+            inputs.home-manager.nixosModules.home-manager
+          ];
+        };
+
+      synology-vm = import ../machines/nixos/x86_64-linux/synology-vm;
+      do-rproxy = import ../machines/nixos/x86_64-linux/do-rproxy;
+    };
   };
 }