FediPanel: allow configuring flake and deployment (#376)

Last part of #361.

Builds on top of #375.

Reviewed-on: Fediversity/Fediversity#376
Reviewed-by: kiara Grouwstra <kiara@procolix.eu>
Co-authored-by: Nicolas “Niols” Jeannerod <nicolas.jeannerod@moduscreate.com>
Co-committed-by: Nicolas “Niols” Jeannerod <nicolas.jeannerod@moduscreate.com>

panel/default.nix

@@ -26,7 +26,9 @@ in
       pkgs.nix
       pkgs.openssh
     ];
-    env = import ./env.nix { } // {
+    env = {
+      DEPLOYMENT_FLAKE = ../.;
+      DEPLOYMENT_NAME = "test";
       NPINS_DIRECTORY = toString ../npins;
       CREDENTIALS_DIRECTORY = toString ./.credentials;
       DATABASE_URL = "sqlite:///${toString ./src}/db.sqlite3";

panel/env.nix

@@ -1,9 +0,0 @@
-{
-  ...
-}:
-let
-  inherit (builtins) toString;
-in
-{
-  REPO_DIR = toString ../.;
-}

panel/nix/configuration.nix

@@ -23,7 +23,9 @@ let
   cfg = config.services.${name};
   package = pkgs.callPackage ./package.nix { };
 
-  environment = import ../env.nix { } // {
+  environment = {
+    DEPLOYMENT_FLAKE = cfg.deployment.flake;
+    DEPLOYMENT_NAME = cfg.deployment.name;
     DATABASE_URL = "sqlite:////var/lib/${name}/db.sqlite3";
     USER_SETTINGS_FILE = pkgs.concatText "configuration.py" [
       ((pkgs.formats.pythonVars { }).generate "settings.py" cfg.settings)
@@ -144,6 +146,23 @@ in
         this workaround.
       '';
     };
+
+    deployment = {
+      flake = mkOption {
+        type = types.path;
+        default = ../..;
+        description = ''
+          The path to the flake containing the deployment. This is used to run the deployment button.
+        '';
+      };
+      name = mkOption {
+        type = types.str;
+        default = "test";
+        description = ''
+          The name of the deployment within the flake.
+        '';
+      };
+    };
   };
 
   config = mkIf cfg.enable {

panel/src/panel/settings.py

@@ -240,6 +240,7 @@ if user_settings_file is not None:
 #     The correct thing to do here would be using a helper function such as with `get_secret()` that will catch the exception and explain what's wrong and where to put the right values.
 #     Replacing the `USER_SETTINGS_FILE` mechanism following the comment there would probably be a good thing.
 
-# path of the root flake to trigger nixops from, see #94.
+# Path of the root flake to trigger nixops from, see #94, and name of the
-# to deploy this should be specified, for dev just use a relative path.
+# deployment.
-repo_dir = env["REPO_DIR"]
+deployment_flake = env["DEPLOYMENT_FLAKE"]
+deployment_name = env["DEPLOYMENT_NAME"]

panel/src/panel/views.py

@@ -96,13 +96,13 @@ class DeploymentStatus(ConfigurationForm):
         cmd = [
             "nixops4",
             "apply",
-            "test",
+            settings.deployment_name,
             "--show-trace",
             "--no-interactive",
         ]
         deployment_result = subprocess.run(
             cmd,
-            cwd = settings.repo_dir,
+            cwd = settings.deployment_flake,
             env = env,
             stderr = subprocess.STDOUT,
         )