# How to Build user-scanner from Source Code: Complete Installation Guide

> Learn to build user-scanner from source code. Follow our guide to clone the repository, install dependencies with pip, and run the CLI for effortless setup.

- Repository: [Kaif/user-scanner](https://github.com/kaifcodec/user-scanner)
- Tags: how-to-guide
- Published: 2026-08-30

---

**Building user-scanner from source requires cloning the `kaifcodec/user-scanner` repository, installing dependencies via `pip install -e .`, and executing the CLI entry point defined in [`user_scanner/__main__.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/__main__.py).**

The **user-scanner** project is a pure-Python OSINT suite for username and email enumeration. Because the repository follows standard Python packaging conventions with metadata defined in [`pyproject.toml`](https://github.com/kaifcodec/user-scanner/blob/main/pyproject.toml) and [`setup.cfg`](https://github.com/kaifcodec/user-scanner/blob/main/setup.cfg), compiling it from source is straightforward across Linux, macOS, and Windows.

## Cloning the Repository

Fetch the complete source tree from GitHub to your local machine:

```bash
git clone https://github.com/kaifcodec/user-scanner.git
cd user-scanner

```

This downloads the `user_scanner/` package directory, test suites, and documentation including [`docs/USAGE.md`](https://github.com/kaifcodec/user-scanner/blob/main/docs/USAGE.md) and [`docs/FLAGS.md`](https://github.com/kaifcodec/user-scanner/blob/main/docs/FLAGS.md).

## Installing Dependencies

Before building, create an isolated Python environment and install runtime requirements. The project pins its dependencies in [`requirements.txt`](https://github.com/kaifcodec/user-scanner/blob/main/requirements.txt) and specifies build system requirements in [`pyproject.toml`](https://github.com/kaifcodec/user-scanner/blob/main/pyproject.toml):

```bash
python -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate

pip install -r requirements.txt

```

## Building and Installing from Source

Install the package in **editable mode** so modifications to the source code reflect immediately without reinstallation. According to the build configuration in [`setup.cfg`](https://github.com/kaifcodec/user-scanner/blob/main/setup.cfg) and [`pyproject.toml`](https://github.com/kaifcodec/user-scanner/blob/main/pyproject.toml):

```bash
pip install -e .

```

This command registers the `user_scanner` package in your environment and creates the `user-scanner` executable. The installation process compiles no C extensions, as the tool is implemented entirely in Python.

## Verifying the Build

Run the project’s test suite to confirm the source built correctly:

```bash
pytest -q

```

The test suite covers core utilities such as [`user_scanner/core/result.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/core/result.py), the workflow manager in [`core/orchestrator.py`](https://github.com/kaifcodec/user-scanner/blob/main/core/orchestrator.py), and the self-update logic in [`utils/update.py`](https://github.com/kaifcodec/user-scanner/blob/main/utils/update.py). Successful execution validates that all dependencies are satisfied and the package structure is intact.

## Running user-scanner from Source

After installation, invoke the tool via the generated CLI entry point. The execution flow begins in [`user_scanner/__main__.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/__main__.py), which initializes argument parsing and displays the banner defined in [`user_scanner/cli/banner.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/cli/banner.py):

```bash

# Scan by email address

user-scanner --email example@example.com

# Scan by username

user-scanner --username someuser

```

## Using the Library Programmatically

Beyond the CLI, you can import the **Engine** class directly into your own scripts. The `Engine` class in [`user_scanner/core/engine.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/core/engine.py) drives the scan workflow:

```python
from user_scanner.core.engine import Engine

engine = Engine()
result = engine.scan_username("alice")
print(result.json())

```

For cross-scanning (equivalent to the `--cross-scan` CLI flag), instantiate the engine and call the appropriate methods within the same session.

## Understanding the Core Architecture

When building from source, familiarity with the key components helps when debugging or extending functionality:

- **[`user_scanner/core/engine.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/core/engine.py)**: Implements the `Engine` class that handles concurrency and drives the scan workflow.
- **[`user_scanner/core/orchestrator.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/core/orchestrator.py)**: Provides the high-level API that combines username and email scans while respecting CLI flags.
- **[`user_scanner/core/result.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/core/result.py)**: Defines the uniform result model with statuses `available`, `taken`, and `error`.
- **[`user_scanner/core/helpers.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/core/helpers.py)**: Contains shared utilities for HTTP requests, impersonation, and confidence scoring.
- **[`user_scanner/utils/updater_logic.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/utils/updater_logic.py)**: Implements the self-update mechanism that fetches the latest release assets.
- **[`user_scanner/cli/__init__.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/cli/__init__.py)**: Handles argument parsing and CLI wiring before handing off to the orchestrator.

Individual scan modules reside under `user_scanner/user_scan/` (for username checks) and `user_scanner/email_scan/` (for email verification). Each module follows the validator signature documented in [`CONTRIBUTING.md`](https://github.com/kaifcodec/user-scanner/blob/main/CONTRIBUTING.md).

## Summary

- Clone the `kaifcodec/user-scanner` repository to obtain the full source tree, including [`pyproject.toml`](https://github.com/kaifcodec/user-scanner/blob/main/pyproject.toml) and [`requirements.txt`](https://github.com/kaifcodec/user-scanner/blob/main/requirements.txt).
- Install dependencies and build the package using `pip install -e .` to enable editable mode.
- Validate the installation by running `pytest -q` to ensure all components in `user_scanner/core/` and `user_scanner/utils/` function correctly.
- Execute the scanner via the `user-scanner` CLI command, which triggers [`user_scanner/__main__.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/__main__.py) and renders the banner from [`cli/banner.py`](https://github.com/kaifcodec/user-scanner/blob/main/cli/banner.py).
- Extend the tool by adding modules to `user_scanner/user_scan/` or `user_scanner/email_scan/` following the patterns in [`CONTRIBUTING.md`](https://github.com/kaifcodec/user-scanner/blob/main/CONTRIBUTING.md).

## Frequently Asked Questions

### What Python version is required to build user-scanner?

The project requires Python 3.8 or higher as specified in the build metadata. Because it is a pure-Python implementation, no platform-specific compilers or build tools are necessary beyond the standard Python toolchain.

### Can I run user-scanner without installing it?

Yes, you can execute the package directly using `python -m user_scanner` from the repository root, provided dependencies from [`requirements.txt`](https://github.com/kaifcodec/user-scanner/blob/main/requirements.txt) are installed. However, installing via `pip install -e .` is recommended to properly register the `user-scanner` CLI entry point and ensure all import paths resolve correctly.

### Where are the CLI arguments parsed in the source code?

Argument parsing and CLI initialization occur in [`user_scanner/cli/__init__.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/cli/__init__.py). The entry point that wires these arguments to the execution engine is defined in [`user_scanner/__main__.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/__main__.py), which imports the `Engine` class from [`core/engine.py`](https://github.com/kaifcodec/user-scanner/blob/main/core/engine.py) and displays the startup banner from [`cli/banner.py`](https://github.com/kaifcodec/user-scanner/blob/main/cli/banner.py).

### How do I contribute new scanning modules after building from source?

New validators should follow the signature documented in [`CONTRIBUTING.md`](https://github.com/kaifcodec/user-scanner/blob/main/CONTRIBUTING.md) and be placed in either `user_scanner/user_scan/` (for username checks) or `user_scanner/email_scan/` (for email checks). Modules must return result objects consistent with the model in [`user_scanner/core/result.py`](https://github.com/kaifcodec/user-scanner/blob/main/user_scanner/core/result.py) to integrate with the [`core/orchestrator.py`](https://github.com/kaifcodec/user-scanner/blob/main/core/orchestrator.py) workflow.