configer 0.6.0

A simple configuration management implemented in Rust.
Documentation 
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/*
 * Copyright © 2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// ----------------------------------------------------------------

use std::env;

use crate::domain::{Node, Table};
use crate::error::ConfigerError;
use crate::reader::ConfigReader;

// ----------------------------------------------------------------

/// @since 0.1.0
pub mod standard;

// ----------------------------------------------------------------

pub trait Environment {
    fn set(&mut self, key: &str, value: Node) -> Result<(), ConfigerError>;
    fn get(&self, key: &str) -> Result<&Node, ConfigerError>;

    /// @since 0.4.0
    fn try_acquire(&self, suffix: &str) -> Option<&dyn ConfigReader>;
    fn try_acquires(&self) -> Vec<&dyn ConfigReader>;
}

// ----------------------------------------------------------------

pub trait DynamicEnvironment: Environment {
    fn set_t<T>(&mut self, k: &str, v: T) -> Result<(), ConfigerError>
        where
            T: Into<Node>,
    {
        self.set(k, v.into())
    }
}

// ----------------------------------------------------------------
pub fn try_load_env_variables() -> Table {
    let vars: Vec<(String, String)> = env::vars().collect();
    let mut table = Table::new();

    for (key, value) in vars {
        table.insert(key, Node::String(value));
    }

    table
}