dev-scaffolder 0.0.6

A dynamic, interactive CLI-based project generator with a tree-based question system and custom template executors.

Project Scaffolder

A dynamic, interactive CLI-based project generator that simplifies the process of scaffolding new projects through a tree-based question system and custom template executors.

Features

• Interactive Question Tree: Navigate through a logical hierarchy of choices defined in JSON.
• Extensible Architecture: Easily add new templates and questions by adding JSON files and Python executors.
• Styled CLI Output: Uses rich to provide a clean and professional command-line interface with panels, colors, and spinners.
• Robust Input Handling: Powered by inquirer for intuitive selections and confirmations.
• Environment-Aware Output: Projects and virtual environments are created in temp/ during development, keeping generated files out of version control.
• Base Executor Pattern: All executors inherit from BaseExecutor, which provides a consistent lifecycle and a built-in loading spinner that automatically pauses around interactive prompts.

Installation

Prerequisites

• Python 3.8+

Setup

1. Clone the repository:

   git clone <repository-url>
   cd template
   

2. Install the required dependencies:

   pip install -r requirements.txt
   

3. Configure your environment by creating a .env file in the project root:

   ENVIRONMENT=development
   

   Accepted values: development, production.

Usage

To start the project generation process, run the main scaffolder script:

python scripts/scaffolder/scaffolder.py

Follow the on-screen prompts to select your project type, language, and other configurations.

Project Structure

template/
├── .env                   # Environment configuration (ENVIRONMENT=development|production)
├── questions/             # JSON files defining the question hierarchy
├── executors/             # Executor classes for each supported framework
│   ├── base.py            # BaseExecutor abstract class (lifecycle + spinner)
│   └── backend/
│       └── python/
│           └── django/    # Django-specific executors
├── processors/            # Core logic: question loading, input handling, template resolution
├── utils/
│   ├── base.py            # Subprocess, file, and venv utilities
│   └── env.py             # Environment detection and path resolution
├── constants/             # Framework-specific code snippets and configuration strings
├── typings/               # Shared type definitions and dataclasses
└── scripts/               # Entry points for running the scaffolder

How It Works

1. Question Loading: The system starts by loading questions/base.json.
2. Dynamic Traversal: Based on user selection, it recursively loads child questions from the file system.
3. Template Resolution: Once a leaf node (a final choice) is reached, the system identifies the corresponding executor in the executors/ directory.
4. Execution: The executor's run() method is called with the gathered parameters. It starts a loading spinner, delegates to generate(), and stops the spinner when done.

Environment Modes

The ENVIRONMENT variable in .env controls where generated output is placed.

ENVIRONMENT	Project output	Virtual environment
development	<project_root>/temp/	<project_root>/temp/venv/
production	Current working directory	<project_root>/venv/

The temp/ directory is listed in .gitignore so development output is never committed.

Executor Architecture

All executors inherit from BaseExecutor (executors/base.py) and must implement:

Method	Purpose
get_venv_environment()	Set up and return the venv Python path
install_dependencies(venv_python_executor)	Install framework packages
execute_creation_commands(**kwargs)	Orchestrate the full scaffold
generate(**kwargs)	Resolve arguments and drive the above steps

prepare_directory() is provided as a concrete default on BaseExecutor — it creates the output directory or prompts the user to replace it if one already exists. Override it only if the executor needs different behaviour.

The public entry point is run(**kwargs), which wraps generate() with a rich loading spinner. Use self._stop_status() / self._start_status() around any interactive inquirer prompts inside your executor to prevent the spinner from blocking user input. Use self._update_status(message) to update the spinner label as execution progresses through steps.

Adding a New Executor

1. Create a JSON file in questions/ defining the configuration options for the new template.
2. Link it to the existing question tree via questions/base.json.
3. Create a Python file in the corresponding executors/ path and subclass BaseExecutor:

from src.executors.base import BaseExecutor
from typings.base import ExecutorResponseStatus


class MyFrameworkExecutor(BaseExecutor):

    def get_venv_environment(self) -> str:
        ...

    def install_dependencies(self, venv_python_executor: str) -> ExecutorResponseStatus:
        ...

    def execute_creation_commands(self, **kwargs) -> ExecutorResponseStatus:
        ...

    def generate(self, **kwargs):
        ...


if __name__ == '__main__':
    args = MyFrameworkExecutor.build_arg_parser().parse_args()
    MyFrameworkExecutor().run(**vars(args))

Contributing

Branching

• main — stable branch; only merge via pull request
• Feature branches should follow the pattern: feature/<short-description> (e.g. feature/fastapi-executor)
• Bug fix branches: fix/<short-description> (e.g. fix/venv-path-dev-mode)

Workflow

1. Fork or branch from main:

   git checkout -b feature/<short-description>
   

2. Set up your environment:

   pip install -r requirements.txt
   cp .env.example .env   # set ENVIRONMENT=development
   

3. Make your changes following the conventions below, then commit:

   git add <files>
   git commit -m "feat: short description of change"
   

4. Push and open a pull request against main.

Adding a Question

Questions live in questions/ as JSON files and mirror the executors/ directory structure. Each file defines a node in the question tree:

{
  "type": "list",
  "name": "my_option",
  "message": "Choose an option",
  "choices": ["Option A", "Option B"],
  "children": []
}

Leaf nodes (no children) trigger executor resolution — the scaffolder maps the answer path directly to a file in executors/.

Adding an Executor

Follow the steps in Adding a New Executor above. Additional conventions:

• Place the file at executors/<category>/<language>/<framework>/<name>.py to match the question path.
• Use self.console for all terminal output — never use print().
• Use self._update_status(message) to label each distinct step in execute_creation_commands.
• Call self._stop_status() before any inquirer.prompt() and self._start_status() immediately after.
• All subprocess calls must use the venv Python executor (get_venv_python_executor()) rather than bare shell commands, so they work correctly in both development and production environments.

Code Style

• Follow PEP 8.
• All public methods must have docstrings with :param: and :return: annotations.
• Keep utils/ functions generic and stateless — executor-specific logic belongs in the executor class.