how can i override config by .env and .env.dev .env.prod

[Silentdoer]

💡 Feature description

💻 Basic example

[arniu]

Please load .env files by dotenv or dotenvy firstly, then parse the environments with envy.

[slvrtrn]

@Silentdoer that's how I implemented it in my project following the "Zero to production in Rust" book (it is recommended to use YAMLs there but I decided to do it my way): https://github.com/serge-klochkov/zero2prod/blob/main/src/config.rs#L24-L45

[rhrn]

@arniu you can do it manually, just load it first

use serde::Deserialize;

#[derive(Deserialize, Debug)]
pub struct Config {
  pub pg_db_url: String,
  pub mysql_db_url: String,
}

pub fn config() -> Result<Config, envy::Error> {
    dotenvy::dotenv().ok(); // !
    envy::from_env::<Config>()
}