set default value for nixops4Package (#412)

Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
Reviewed-on: Fediversity/Fediversity#412
Reviewed-by: Valentin Gagarin <valentin.gagarin@tweag.io>
Co-authored-by: Kiara Grouwstra <kiara@procolix.eu>
Co-committed-by: Kiara Grouwstra <kiara@procolix.eu>

deployment/check/panel/nixosTest.nix

@@ -155,7 +155,6 @@ in
           SECRET_KEY = dummyFile;
         };
         port = panelPort;
-        nixops4Package = inputs.nixops4.packages.${pkgs.system}.default;
 
         deployment = {
           flake = "/run/fedipanel/flake";

panel/README.md

@@ -4,9 +4,9 @@ The Fediversity Panel is a web service for managing Fediversity deployments with
 
 ## Development
 
-- To obtain all tools related to this project, enter the development environment in the root directory by `nix-shell`, then similar from this directory.
+- To obtain all tools related to this project, enter the development environment with `nix-shell`.
 
-  If you want to do that automatically on entering a directory:
+  If you want to do that automatically on entering this directory:
 
   - [Set up `direnv`](https://github.com/nix-community/nix-direnv#installation)
   - Run `direnv allow` in the directory where repository is stored on your machine

panel/default.nix

@@ -21,8 +21,7 @@ in
       pkgs.npins
       manage
 
-      # NixOps4 and its dependencies
-      # FIXME: grab NixOps4 and add it here
+      pkgs.nixops4
       pkgs.nix
       pkgs.openssh
     ];

panel/nix/configuration.nix

@@ -147,6 +147,7 @@ in
         NixOps4 from the package's npins-based code, we will have to do with
         this workaround.
       '';
+      default = pkgs.nixops4;
     };
 
     deployment = {

panel/nix/overlay.nix

@@ -8,4 +8,17 @@ let
 in
 {
   python3 = prev.lib.attrsets.recursiveUpdate prev.python3 { pkgs = extraPython3Packages; };
+  nixops4 =
+    let
+      sources = import ../../npins;
+      inherit (import sources.flake-inputs) import-flake;
+      inherit
+        (import-flake {
+          src = ../../.;
+        })
+        inputs
+        ;
+      inherit (inputs) nixops4;
+    in
+    nixops4.packages.${prev.system}.default;
 }

panel/nix/tests.nix

@@ -13,7 +13,6 @@ let
       secrets = {
         SECRET_KEY = pkgs.writeText "SECRET_KEY" "secret";
       };
-      nixops4Package = pkgs.hello; # FIXME: actually pass NixOps4
     };
 
     virtualisation = {