Reintroduce test machines deployment

infra/flake-part.nix

@@ -1,11 +1,17 @@
 {
+  self,
   inputs,
   lib,
   ...
 }:
 
 let
-  inherit (lib) mkOption evalModules;
+  inherit (lib)
+    attrNames
+    mkOption
+    evalModules
+    mapAttrs
+    ;
   inherit (lib.attrsets) genAttrs;
 
   ## Given a machine's name, make a resource module, except for its missing
@@ -21,7 +27,7 @@ let
   };
 
   ## Given a list of machine names, make a deployment with those machines'
-  ## configurations as resources
+  ## configurations as resources.
   makeDeployment =
     vmNames:
     { providers, ... }:
@@ -37,6 +43,25 @@ let
     };
   makeDeployment' = vmName: makeDeployment [ vmName ];
 
+  ## Given an attrset of test configurations (key = test machine name, value =
+  ## NixOS configuration module), make a deployment with those machines'
+  ## configurations as resources.
+  makeTestDeployment =
+    vmConfigs:
+    { providers, ... }:
+    {
+      providers.local = inputs.nixops4.modules.nixops4Provider.local;
+      resources = mapAttrs (vmName: vmConfig: {
+        type = providers.local.exec;
+        imports = [
+          inputs.nixops4-nixos.modules.nixops4Resource.nixos
+          (makeResourceModule vmName)
+          { nixos.module = vmConfig; }
+          { nixos.module = self.nixosModules.fediversity; }
+        ];
+      }) vmConfigs;
+    };
+
   nixops4ResourceNixosMockOptions = {
     ## NOTE: We allow the use of a few options from
     ## `inputs.nixops4-nixos.modules.nixops4Resource.nixos` such that we can
@@ -92,13 +117,81 @@ let
     "fedi201"
   ];
 
-  testMachines = [
-    "test01"
-    "test02"
-    "test03"
-    "test04"
-    "test05"
-  ];
+  testMachineConfigurations =
+    let
+      ## NOTE: All of these secrets are publicly available in this source file
+      ## and will end up in the Nix store. We don't care as they are only ever
+      ## used for testing anyway.
+      mastodonS3KeyConfig =
+        { pkgs, ... }:
+        {
+          s3AccessKeyFile = pkgs.writeText "s3AccessKey" "GK3515373e4c851ebaad366558";
+          s3SecretKeyFile = pkgs.writeText "s3SecretKey" "7d37d093435a41f2aab8f13c19ba067d9776c90215f56614adad6ece597dbb34";
+        };
+      peertubeS3KeyConfig =
+        { pkgs, ... }:
+        {
+          s3AccessKeyFile = pkgs.writeText "s3AccessKey" "GK1f9feea9960f6f95ff404c9b";
+          s3SecretKeyFile = pkgs.writeText "s3SecretKey" "7295c4201966a02c2c3d25b5cea4a5ff782966a2415e3a196f91924631191395";
+        };
+      pixelfedS3KeyConfig =
+        { pkgs, ... }:
+        {
+          s3AccessKeyFile = pkgs.writeText "s3AccessKey" "GKb5615457d44214411e673b7b";
+          s3SecretKeyFile = pkgs.writeText "s3SecretKey" "5be6799a88ca9b9d813d1a806b64f15efa49482dbe15339ddfaf7f19cf434987";
+        };
+
+    in
+    {
+      test01 =
+        { pkgs, ... }:
+        {
+          fediversity = {
+            domain = "abundos.eu";
+            garage.enable = true;
+            pixelfed = pixelfedS3KeyConfig { inherit pkgs; };
+            mastodon = mastodonS3KeyConfig { inherit pkgs; };
+            peertube = peertubeS3KeyConfig { inherit pkgs; };
+          };
+        };
+
+      test02 =
+        { pkgs, ... }:
+        {
+          fediversity = {
+            domain = "abundos.eu";
+            mastodon = mastodonS3KeyConfig { inherit pkgs; } // {
+              enable = true;
+            };
+
+            temp.cores = 1; # FIXME: should come from NixOps4 eventually
+          };
+        };
+
+      test03 =
+        { pkgs, ... }:
+        {
+          fediversity = {
+            domain = "abundos.eu";
+            peertube = peertubeS3KeyConfig { inherit pkgs; } // {
+              enable = true;
+              ## NOTE: Only ever used for testing anyway.
+              secretsFile = pkgs.writeText "secret" "574e093907d1157ac0f8e760a6deb1035402003af5763135bae9cbd6abe32b24";
+            };
+          };
+        };
+
+      test04 =
+        { pkgs, ... }:
+        {
+          fediversity = {
+            domain = "abundos.eu";
+            pixelfed = pixelfedS3KeyConfig { inherit pkgs; } // {
+              enable = true;
+            };
+          };
+        };
+    };
 
 in
 {
@@ -111,8 +204,10 @@ in
   ## - We add a “test” deployment with all test machines.
   nixops4Deployments = genAttrs machines makeDeployment' // {
     default = makeDeployment machines;
-    test = makeDeployment testMachines;
+    test = makeTestDeployment testMachineConfigurations;
   };
-  flake.nixosConfigurations = genAttrs (machines ++ testMachines) makeConfiguration;
-  flake.vmOptions = genAttrs (machines ++ testMachines) makeVmOptions;
+  flake.nixosConfigurations = genAttrs (
+    machines ++ attrNames testMachineConfigurations
+  ) makeConfiguration;
+  flake.vmOptions = genAttrs (machines ++ attrNames testMachineConfigurations) makeVmOptions;
 }