env-smart

Improved version of env! macro from std.

Syntax:

• Standard env! - If plain string specified then behavior is the same as standard env macro
• Simplified formatting - Allows to format string using multiple variables enveloped into {} brackets. Note that bracket escaping is not supported

Sources

Macro fetches environment variables in following order:

• Use .env file from root where build is run. Duplicate values are not allowed.
• Use current environment where proc macro runs. It will not override .env variables

Usage

use env_smart::env;

static USER_AGENT: &str = env!("{CARGO_PKG_NAME}-{CARGO_PKG_VERSION}");

assert_eq!(USER_AGENT, "env-smart-1.0.0");