DotEnv Plus

A powerful and flexible configuration loader for Dart, supporting nested keys, type conversion, and variable interpolation.

Features

• Load configuration from .env files, environment variables, and custom sources.
• Support for nested keys using dot notation (e.g., DATABASE.HOST).
• Type conversion for common data types (e.g., int, bool, double).
• Variable interpolation to reference other configuration values (e.g., API_URL=http://${HOST}:${PORT}).
• Custom mappers to create complex configuration objects from the loaded values.

Usage

import'package:dotenv_plus/dotenv_plus.dart';
voidmain() async {
final config =awaitConfig.load(
sources: [
DotEnv('.env'),
SystemEnv(),
],
extensions: [
return (ConfigBuilder builder) {
builder.map<ConfigMapper>('db', (ctx) {
returnConfigMapper.fromKey(ctx.section);
});
};
]
);
print(config.get<String>('API_URL')); // Output: http://localhost:3000final dbConfig = config.get<DatabaseConfig>('DATABASE');
print(dbConfig.host); // Output: localhost
}

License

This project is licensed under the MIT License. See the LICENSE file for details.