Crate dotenv_config_ext

dotenv_config provides a way to read configuration from environment variables.

use .env as config file and parse environments to config struct.

Usage

derive EnvConfig

use dotenv::dotenv;
use dotenv_config_ext::EnvConfig;

#[derive(Debug, EnvConfig)]
struct Config {
    #[env_config(default = "192.168.2.1")]
    server_addr: String,
    server_mode: bool,
    #[env_config(name = "ZINC_FOO", default = true)]
    foo: bool,
    #[env_config(name = "ZINC_BAR", default = 123456)]
    bar: Option<i64>,
}

macro_rules! aw {
($e:expr) => {
   tokio_test::block_on($e)
};
}

fn main() {
    dotenv().ok();
    let cfg = aw!(Config::init()).unwrap();
    println!("{:#?}", cfg);
}

attribute env_config

you can use macro attribute set field attribute

• name: change default environment key
• default: if not set, used as default value

you can though system environments or .env file config it.

ZINC_FOO=false
ZINC_BAR=8787878

default load environment key is: structName_fieldName do UpperSnake, like above struct, default config key is:

CONFIG_SERVER_ADDR
CONFIG_SERVER_MODE
ZINC_FOO
ZINC_BAR

If you have some problems please go to github create a issue. https://github.com/sombralibre/dotenv-config

Derive Macros

EnvConfig