envor

通过默认值将环境变量获取到类型中。

用法

use envor::envor::*;

fn main() {
    let config_value: usize = env_or("CONFIG_VALUE", 100);

    let flag: bool = env_or("SETTING", false);

    let config_string = env_string_or("CONFIG_STRING", "default string");

    let flag_env_true = env_true("FLAG_ONLY_TRUE_WHEN_DEFINED_AND_ITS_LOWER_CASE_IS_EQUAL_TO_TRUE");

    println!(
        "config_value = {} , setting = {} , config_string = {} , flag_env_true = {}",
        config_value, flag, config_string, flag_env_true
    );
}

高级

use envor::envor::*;

fn main() {
    let opt_value_ok: Option<i32> = env_or_opt("OPT_VALUE", -50);

    let opt_value_illegal: Option<i32> = env_or_opt("OPT_VALUE", "illegal default");

    println!(
        "opt_value_ok = {:?} , opt_value_illegal = {:?}",
        opt_value_ok, opt_value_illegal
    );
}

日志记录

export RUST_LOG=info
# or
export RUST_LOG=debug