yuyawata

use std::env;
use std::process;

fn main() {
    // HOST=myserver
    // PORT=8080
    let host_key = "HOST";
    let port_key = "PORT";
    let default_port = 8080;

yuyawata

[package]
name = "rust-envy-sample"
version = "0.1.0"
authors = ["Yutaka Yawata"]
edition = "2018"

[dependencies]
envy = "0.3.3"
serde = "1.0.87"
serde_derive = "1.0.87"

yuyawata

use serde_derive::Deserialize;
use envy;
use std::process;

#[derive(Deserialize, Debug)]
struct Config {
    host: String,
    port: Option<u16>,
    numbers: Vec<u64>,
}

yuyawata

use serde_derive::Deserialize;
use envy;
use std::error::Error;

#[derive(Deserialize, Debug)]
struct Config {
    host: String,
    #[serde(default="default_port")]
    port: u16,
    numbers: Vec<u64>,

yuyawata

[package]
name = "rust-envconfig-sample"
version = "0.1.0"
authors = ["Yutaka Yawata"]
edition = "2018"

[dependencies]
envconfig = "0.5.0"
envconfig_derive = "0.5.0"