Environment Variables for development and production

I want to inject different sets of values with an env variable development and another set for production. is it possible in rust?

I tried this with the config crate but this is giving some errors when I directly run the .exe file in the target folder.

any suggestions?

Does #[cfg(debug_assertions)] work?

Take a look at figment: https://crates.io/crates/figment. It's from the creator of the Rocket web server framework.

Invent your own, and set them yourself in your terminal/environment. There is nothing built-in into Rust.

cfg(debug_assertions) is a hack. Assertions are usually enabled in the debug mode, but they can be disabled in debug mode, and they can be also enabled in release mode.

You can use Dotenv — Rust utility // Lib.rs.

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