Crate rust_env 

rust-env

rust-env is a lightweight environment configuration library for Rust.

It helps you manage .env-style configuration files with support for:

• Key-value pairs
• Vector (list) values using ; separators
• Runtime OS environment variables
• Reading and writing environment files

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Features

• Parse .env files into structured data
• Support for string and vector values
• Access local and global environment variables
• Modify and persist environment files
• Simple helper API for extracting values

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Value Model

Internally, rust-env represents data using:

• Str(key, value)
• Vec(key, Vec<String>)
• Comment(String)

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Example

use rust_env::Env;

let mut env = Env::new("./.env");

let port = env.get_pair("PORT");
env.set(Str("PORT", "8080"));

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Local vs Global

• Local: values loaded from .env file
• Global: OS environment variables

When using merged lookup:

global > local

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Notes

• All values are stored as strings internally
• Vector values are separated using ;
• File writes occur immediately when using set

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Version History

v0.2.0

• Added match_str and match_vec helpers
• Refactored codebase into multiple files
• Fixed 3 known bugs

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Experimental

Experimental features such as a future markup language (RML) are not part of this crate.

They may be developed separately in the future.

Structs

Env

The main environment container used by rust-env.

Enums

Pair

Wrapper

This enum mainly rap two type of data String and Vec<String> See docs of struct Env of this package for learn more

Traits

EnvFrame

A trait that defines the core behavior of an environment system.

Functions

Str

get_d

match_str

On version 0.2.0 of rust-env DX improved You don’t need to match a Wrapper variant Instead use match_str and match vec Here’s a example

match_vec

On version 0.2.0 of rust-env DX improved You don’t need to match a Wrapper variant Instead use match_str and match vec Here’s a example