adotenv-figment

A figment provider for literal adotenv documents.

use adotenv::parse_strict;
use adotenv_figment::AdotenvProvider;
use figment::Figment;

let doc = parse_strict("host=localhost\nport=8080\n")?;
let figment = Figment::new().merge(AdotenvProvider::from_document(&doc));

from_values accepts an explicit map. The load feature adds from_environment for LoadedEnvironment.

Values and keys

The provider uses Profile::Default and keeps original key spelling. Figment's path lookups still treat dots as separators. Extract into a literal map or a matching typed structure when dots are part of a key.

Values are strings. Deserialize string fields and convert numbers or booleans explicitly.

use serde::Deserialize;

#[derive(Deserialize)]
struct RawApp {
    host: String,
    port: String,
}

let raw: RawApp = Figment::new()
    .merge(AdotenvProvider::from_document(&doc))
    .extract()?;
let port: u16 = raw.port.parse()?;

Duplicate policy, lookup participation and BareKeys::Empty follow the source document or loaded environment. The adapter performs no expansion, command execution or file access.

The crate supports Rust 1.81.