Using envvault with Dart/Flutter

Note: Please ensure that you have completed the previous steps

Prerequisites

Dart SDK installed
envvault CLI tool installed
An existing Dart project

Usage

Running Your Application

To run your Dart application with environment variables from envvault:

$ envvault run --env=dev dart run

Caching Environment Variables

For better performance, you can cache your environment variables:

$ envvault run --env=dev -c -- dart run

Example Implementation

Here is how to set up a basic Dart web server with envvault:

// main.dart
import 'package:shelf/shelf.dart' as shelf;
import 'package:shelf/shelf_io.dart' as io;
import 'dart:io' show Platform;

void main() async {
  // Your environment variables are automatically loaded
  final port = Platform.environment['PORT'] ?? '8080';
  final dbUrl = Platform.environment['DB_URL'];

  final handler = const shelf.Pipeline()
      .addMiddleware(shelf.logRequests())
      .addHandler(_handleRequest);

  final server = await io.serve(
    handler,
    'localhost',
    int.parse(port),
  );

  print('Serving at http://${server.address.host}:${server.port}');
}

shelf.Response _handleRequest(shelf.Request request) {
  return shelf.Response.ok('Hello from envvault!');
}

// pubspec.yaml
name: my_app
dependencies:
  shelf: ^1.4.0