gen-cli 1.0.0

Gen-CLI is a Python-based tool to generate boilerplate code and framework templates for multiple programming languages.

Gen-CLI

Gen-CLI is a Python-based command-line tool for generating boilerplate code and framework templates for multiple programming languages.

Features

• Single-file boilerplate generation based on file extension
• Project scaffolding using language and framework templates
• Directory tree visualization
• Environment diagnostics with gen doctor
• Version information with --version / -v
• Dry-run mode for previewing outputs

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Installation

Using pip

pip install gen-cli

Using uv (Faster)

uv pip install gen-cli

Using pipx (Isolated)

pipx install gen-cli

From Source

git clone https://github.com/iamprasadraju/gen-cli.git
cd gen-cli

# Install for usage
pip install -e .

# Install for development (includes tests, linting tools)
pip install -e .[dev]

Verify Installation

gen --version

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Quick Start

# Generate a Python file
gen main.py

# Generate a FastAPI project
gen new myapp --lang python --template fastapi

# Check your environment
gen doctor

# List available templates
gen list

# Show version
gen --version

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Commands

gen --version / gen -v

Show the installed version of gen-cli.

gen --version
gen -v

Output: gen-cli version 0.1.7

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gen --help / gen -h / gen help

Show the help message.

gen --help
gen -h
gen help

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gen doctor

Check your environment and configuration for potential issues.

gen doctor

Output:

========================================
Gen CLI Doctor
========================================
Python Version: 3.14.2
Platform: macOS-15.7.3-arm64
Working Directory: /Users/user/project
PATH directories: 17
========================================
All checks passed!

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gen list

List all available language templates and framework templates.

gen list

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gen tree

Display a tree view of your directory structure.

gen tree                    # current directory
gen tree -r                 # recursive (all levels)
gen tree -d 3               # depth of 3 levels
gen tree path/to/dir        # specific directory

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gen new

Generate a new project from a language and framework template.

gen new <project_name> --lang <language> --template <template>

Options:

Flag	Description	Required
--lang	Programming language	Yes
--template	Framework or template name	Yes
--dryrun	Preview without creating files	No

Examples:

# Python projects
gen new myapp --lang python --template fastapi
gen new api --lang python --template flask
gen new web --lang python --template django

# Go projects
gen new mytool --lang go --template cli
gen new service --lang go --template web

# Rust projects
gen new server --lang rust --template actix
gen new mylib --lang rust --template rocket

# JavaScript projects
gen new app --lang javascript --template react
gen new api --lang javascript --template node

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Single File Generation

Generate a boilerplate file directly by specifying its extension.

gen main.py          # Python file
gen app.go           # Go file
gen index.js         # JavaScript file
gen main.rs          # Rust file
gen main.c           # C file
gen main.cpp         # C++ file
gen main.java        # Java file
gen index.html       # HTML file

Options:

Flag	Description
--dryrun	Preview the file content without creating it
--overwrite	Overwrite existing file

Examples:

gen main.py --dryrun          # Preview Python file
gen app.py --overwrite        # Overwrite existing file

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Supported Languages & Templates

Language	Templates
Python	flask, fastapi, django, lib, project
Go	cli, web
Rust	actix, rocket
C	standard
C++	standard
Java	spring, standard
JavaScript	node, react, vue
HTML	standard

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File Extensions

Extension	Language
.py	Python
.go	Go
.rs	Rust
.c	C
.cpp	C++
.java	Java
.js	JavaScript
.html	HTML

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Error Handling

Gen-CLI provides clear error messages for common issues:

• Invalid commands → Displays help message
• Unsupported file extensions → Lists available templates
• Invalid template combinations → Shows valid options
• Tree errors → Falls back to current directory
• Existing files/directories → Shows appropriate message

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Development

Setup

First, ensure you have installed the development dependencies:

pip install -e .[dev]

Running Tests

# Run all tests
python3 -m pytest tests -v

# Run specific test
python3 -m pytest tests/test_list.py -v

Test Coverage

Test Class	Description
TestCLI	Core CLI module tests
TestVersion	Version command tests
TestFilenameMode	Single file generation tests
TestDoctor	Environment diagnostics tests
TestListCommand	Template listing tests
TestTreeCommand	Tree visualization tests
TestTemplateCommand	Template generation tests
TestConfig	Configuration tests
TestCore	Core module tests
TestHelper	Help command tests
TestMain	Main entry point tests

Running from Source

python3 -m gen.cli <command>

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Project Structure

gen-cli/
├── src/
│   └── gen/
│       ├── __init__.py
│       ├── cli.py              # Main CLI entry point
│       ├── config.py           # Configuration & extension maps
│       ├── commands/
│       │   ├── __init__.py
│       │   ├── doctor.py       # Environment diagnostics
│       │   ├── helper.py       # Help messages
│       │   ├── list_.py        # Template listing
│       │   └── template.py     # Template generation
│       ├── core/
│       │   ├── __init__.py
│       │   └── render.py       # Jinja2 template rendering
│       └── templates/          # Built-in templates
├── tests/
│   └── test_cli.py             # Comprehensive unit tests
├── pyproject.toml
└── README.md

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License

MIT License

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Author

Prasad Raju G