python-template: backport some changes from clan-cli

templates/python-project/flake-module.nix

@@ -1,10 +1,16 @@
-{
-  perSystem = { pkgs, ... }:
+{ self, ... }: {
+  perSystem = { self', pkgs, ... }:
     let
-      package = pkgs.callPackage ./default.nix { };
+      name = "python-template";
     in
     {
-      # packages.${name} = package;
-      checks.python-template = package.tests.check;
+      packages.${name} = pkgs.callPackage ./default.nix { };
+
+      devShells.${name} = pkgs.callPackage ./shell.nix {
+        inherit self;
+        package = (self'.packages.${name});
+      };
+
+      checks.python-template = self'.packages.${name}.tests.check;
     };
 }

templates/python-project/pyproject.toml

@@ -2,8 +2,8 @@
 requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
 
-[tool.setuptools.packages.find]
-include = ["my_tool*"]
+[tool.setuptools]
+packages = ["my_tool"]
 
 [project]
 name = "my_tool"

templates/python-project/shell.nix

@@ -1,11 +1,6 @@
-{ pkgs ? import <nixpkgs> { } }:
+{ package, pkgs, ... }:
 let
-  lib = pkgs.lib;
-  python3 = pkgs.python3;
-  package = import ./default.nix {
-    inherit lib python3;
-  };
-  pythonWithDeps = python3.withPackages (
+  pythonWithDeps = pkgs.python3.withPackages (
     ps:
     package.propagatedBuildInputs
     ++ package.devDependencies