updated

nix/module.nix

@@ -1,32 +1,41 @@
-inputs: {
+inputs:
+{
   config,
   lib,
   pkgs,
   ...
-}: let
+}:
+let
   cfg = config.services.testdata;
   package = inputs.self.packages.${pkgs.stdenv.hostPlatform.system}.default;
-  inherit (lib) mkIf mkEnableOption mkOption types;
+  inherit (lib)
+    mkIf
+    mkEnableOption
+    mkOption
+    types
+    ;
 
-  format = pkgs.formats.json {};
+  format = pkgs.formats.json { };
   configFile = format.generate "config.json" cfg.settings;
-in {
+in
+{
   options.services.testdata = {
     enable = mkEnableOption "testdata";
 
     settings = mkOption {
-      type = with types; let
-        valueType = nullOr (oneOf [
-          # TODO: restrict type to actual config file structure
-          bool
-          int
-          float
-          str
-          path
-          (attrsOf valueType)
-          (listOf valueType)
-        ]);
-      in
+      type =
+        with types;
+        let
+          valueType = nullOr (oneOf [
+            bool
+            int
+            float
+            str
+            path
+            (attrsOf valueType)
+            (listOf valueType)
+          ]);
+        in
         valueType;
       default = throw "Please specify services.testdata.settings";
     };
@@ -43,7 +52,7 @@ in {
   };
 
   config = mkIf cfg.enable {
-    environment.systemPackages = [package];
+    environment.systemPackages = [ package ];
 
     systemd.services.testdata = {
       enable = true;
@@ -53,7 +62,7 @@ in {
         ExecStart = "${package}/bin/testdata --config ${configFile} --listen ${cfg.host} --port ${builtins.toString cfg.port}";
       };
 
-      wantedBy = ["multi-user.target"];
+      wantedBy = [ "multi-user.target" ];
     };
   };
 }

nix/package.nix

@@ -0,0 +1,46 @@
+{
+  src,
+  python3Packages,
+}:
+let
+  inherit (python3Packages)
+    setuptools
+    fastapi
+    uvicorn
+    pydantic
+    pytest
+    requests
+    mypy
+    pylint
+    ;
+
+  project = (builtins.fromTOML (builtins.readFile "${src}/pyproject.toml")).project;
+  pname = project.name;
+  version = project.version;
+in
+python3Packages.buildPythonPackage {
+  inherit pname version src;
+
+  pyproject = true;
+
+  build-system = [ setuptools ];
+
+  dependencies = [
+    fastapi
+    uvicorn
+    pydantic
+  ];
+
+  nativeCheckInputs = [
+    pytest
+    requests
+    mypy
+    pylint
+  ];
+
+  checkPhase = ''
+    pytest tests
+    mypy src
+    pylint src
+  '';
+}