initial commit

templates/dev/py-hello/.github/workflows/python-nix.yml

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+name: Python Nix Pipeline
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build-and-test:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/checkout@v3
+    
+    - name: Set up Nix
+      uses: cachix/install-nix-action@v18
+      with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
+    - name: Run nix flake check
+      run: nix flake check

templates/dev/py-hello/.gitignore

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+# Byte-compiled Python files
+*.py[cod]
+__pycache__/
+
+# Distribution / packaging
+.Python
+*.egg
+*.egg-info/
+.coverage
+.htmlcov/
+.pytest_cache/
+.tox/
+.venv/
+ENV/
+build/
+dist/
+env.bak/
+env/
+venv.bak/
+venv/
+
+# IDE/editor files
+*.sublime-project
+*.sublime-workspace
+.idea/
+.vscode/
+
+# Nix-related files
+result

templates/dev/py-hello/flake.nix

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+{
+  description = "A hello world template in Python";
+
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+    pre-commit-hooks = {
+      url = "github:cachix/pre-commit-hooks.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      ...
+    }:
+    let
+      pname = "hello-world";
+      version = "0.1.0";
+
+      supportedSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+
+      nixpkgsFor = forAllSystems (
+        system:
+        import nixpkgs {
+          inherit system;
+          overlays = [ self.overlays.default ];
+        }
+      );
+    in
+    {
+      overlays.default =
+        final: prev:
+        let
+          python = final.python312;
+        in
+        {
+          "${pname}" = python.pkgs.buildPythonApplication {
+            inherit pname version;
+            pyproject = true;
+            src = ./.;
+            build-system = [
+              python.pkgs.setuptools
+              python.pkgs.wheel
+            ];
+            dependencies = with python.pkgs; [
+            ];
+            pythonImportsCheck = [
+              "hello_world"
+            ];
+          };
+        };
+
+      packages = forAllSystems (system: {
+        default = nixpkgsFor.${system}."${pname}";
+        "${pname}" = nixpkgsFor.${system}."${pname}";
+      });
+
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgsFor.${system};
+          python = pkgs.python312;
+        in
+        {
+          default = pkgs.mkShell {
+            inherit (self.checks.${system}.pre-commit-check) shellHook;
+            buildInputs = self.checks.${system}.pre-commit-check.enabledPackages ++ [
+              (python.withPackages (
+                p: with p; [
+                ]
+              ))
+            ];
+          };
+
+          venv = pkgs.mkShell {
+            buildInputs = [
+              python
+            ]
+            ++ [
+              (python.withPackages (
+                p: with p; [
+                  pip
+                ]
+              ))
+            ];
+            shellHook = ''
+              python -m venv .venv
+              source .venv/bin/activate
+              pip install .
+            '';
+          };
+        }
+      );
+
+      formatter = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          config = self.checks.${system}.pre-commit-check.config;
+          inherit (config) package configFile;
+          script = ''
+            ${pkgs.lib.getExe package} run --all-files --config ${configFile}
+          '';
+        in
+        pkgs.writeShellScriptBin "pre-commit-run" script
+      );
+
+      checks = forAllSystems (system: {
+        # TODO: Add integration test
+
+        pre-commit-check = self.inputs.pre-commit-hooks.lib.${system}.run {
+          src = ./.;
+          hooks = {
+            nixfmt = {
+              enable = true;
+            };
+            # TODO: Add Python format check
+          };
+        };
+      });
+    };
+}

templates/dev/py-hello/pyproject.toml

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+[build-system]
+requires = ["setuptools>=75", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "hello-world"
+version = "0.1.0"
+requires-python = ">=3.12"
+
+dependencies = [
+]
+
+[project.scripts]
+hello-world = "hello_world.__main__:main"

templates/dev/py-hello/src/hello_world/__init__.py

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+# This file is intentionally empty.

templates/dev/py-hello/src/hello_world/__main__.py

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+def main():
+    print("Hello, world!")
+
+if __name__ == "__main__":
+    main()