envcast

Overview

envcast is a runtime crate that provides utilities to:

• read environment variables,
• load values from .env files,
• parse string values into typed Rust fields.

It is designed to work with the FromEnv derive macro from envcast_derive.

Features

• Environment variable lookup
• .env file support
• Custom .env path via DOTENV_CONFIG_FILE
• Deterministic value resolution order
• Field-level default values
• Zero runtime reflection
• Works with OnceLock, lazy_static, and once_cell
• MSRV: Rust 1.70.0

License

MIT