env_applier

crates.io

env_applier is a Rust crate that applies environment variables to placeholders in a string, making configuration handling simple and flexible.

Getting Started

Installation

Add the following line to your Cargo.toml:

[dependencies]
env_applier = "x.y.z" # Replace with the latest version

Quick Start

Basic Example

extern crate env_applier;

use env_applier::*;

fn main() -> () {
    let config = r#"{"test":"{{ HOME }}"}"#.to_string().apply();
    println!("My new config : {:?}", config);
}

In this example, {{ HOME }} is replaced with the value of the HOME environment variable.

Example with Prefix

extern crate env_applier;

use env_applier::*;

fn main() -> () {
    let config = r#"{"test":"{{ HOME }}"}"#.to_string().apply_with_prefix("MY_PREFIX");
    println!("My new config : {:?}", config);
}

When using apply_with_prefix, only environment variables prefixed with MY_PREFIX will be considered.

Useful link

Contributing

Contributions are welcome!

To contribute:

Fork the repository and create your branch (git checkout -b feature/my-feature).
Commit your changes (git commit -m 'Add some feature').
Push to the branch (git push origin feature/my-feature).
Open a pull request.

For major changes, please open an issue first to discuss your proposal.

Please ensure that tests are added or updated as appropriate.

License

Licensed under either of the following, at your option:

env_applier 1.1.2