Nexus

Nexus is a Rust-based CLI tool for analyzing and visualizing code dependencies in source files. It builds a dependency graph from Rust code and supports circular dependency detection.

Features

• Analyze Rust project structure by parsing mod and use declarations
• Generate dependency graph in DOT format
• Detect circular dependencies
• Traverse entire source directory
• Modular parser system (currently supports Rust, Javascript, Python and Java)

Project Structure

nexus/
├── src/
│   ├── main.rs          # CLI entrypoint
│   ├── graph/           # Graph construction and cycle detection
│   ├── parsers/         # Rust parser module
│   ├── utils/           # File system walking logic
│   └── analyzer/        # Central analyzer logic

Usage

Build

cargo build --release

Run

cargo run -- --path ./src

Options

Flag	Description	Default
--path, -p	Path to the source code directory	(required)
--output, -o	Output file path	output.dot
--format	Output format: dot or json	dot
--detect-cycles	Enable or disable circular dependency check	true

Example:

cargo run -- --path ./src --output graph.dot --format dot --detect-cycles false

Output

The tool outputs a .dot file representing the dependency graph. You can render it using Graphviz:

dot -Tpng output.dot -o graph.png