Macro_env is a crate to find environment variables.
Originally designed to easily fetch environment variables from different places without having to change a lot of different code.
By simply changing the SearchType in the macro or in the function, it fetches the variable from a different location.
First add:
toml
[dependencies]
macro_env = "0.1.*"
Macro
``rust
// Import the crate, importing the whole crate is the easiest
// You can also manually import the function you need, for .env search for example:
//use macroenv::{dotenvreader, macroenv};`
use macro_env::*;
// Fetch the environment variable "OS" from the .env file at the cargo.toml level macro_env!(File, "OS");
// Fetch the environment variable "OS" from the system environment variables macro_env!(System, "OS");
// Asks the user for enter the input through the terminal macro_env!(Input);
// All, without specifying the searchtype, will try to find the variable through all 3 methods: // First it checks for a .env file // Then by searching for a system variable // And if both fail, it will ask the user for input macroenv!(All, "OS"); macroenv!("OS");
```
EnvSeeker()
rust
use macro_env::*;
use macro_env::SearchType::*;
// You can use envseeker() when you prefer using a function over a macro
envseeker(Envfile, "OS")