use-env-var

Environment variable primitives for RustUse CLI-adjacent code.

This crate validates environment variable names and wraps safe reads from std::env. It does not provide a global configuration system, cache, mutation API, or process-wide runtime.

Example

use use_env_var::{EnvVarName, is_valid_env_var_name};

let name = EnvVarName::new("RUST_LOG")?;

assert_eq!(name.as_str(), "RUST_LOG");
assert!(is_valid_env_var_name("RUST_LOG"));
# Ok::<(), use_env_var::EnvVarNameError>(())

Scope

Use this crate when a library needs stable env var vocabulary without owning configuration policy.