How does this find an available port? Show me the actual implementation.

Unfortunately, the repository has minimal indexed code coverage — the semantic search didn't return the implementation details. The README excerpt doesn't show the actual implementation either.

To understand how getPort finds an available port, you'll need to read the source code directly. Based on the repository structure, the main entry point is likely in the root index.js or index.ts file. Look there for:

1. The core logic that checks port availability (likely using Node.js net module to attempt binding)
2. The fallback mechanism when preferred ports aren't available
3. The port reservation logic mentioned in the API docs
4. How it checks availability across different hosts/addresses

The README mentions it checks availability on "all local addresses defined in OS network interfaces" by default, which suggests the implementation uses Node.js's os.networkInterfaces() and attempts to bind sockets to test availability.

I apologize that I can't provide the exact line-by-line implementation without full code access. You can inspect the source files in the repository directly.

FOLLOW_UPS:

• What does the reserve option do internally?
• How does the exclude parameter filter out ports?
• Does it support checking IPv6 availability differently?