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1. Vedsaga commented on May 2, 2023

   

   Vedsaga

   on May 2, 2023

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   Answer from Chat-GPT

   @dirablue

   To exclude the .env file only for release builds in a Flutter project, you can modify your build.gradle file located in the android/app directory of your project.

   Here are the steps to do so:

   Open the build.gradle file in an editor.
   
   Add the following code inside the android block:
   

   android {
       // ...
   
       buildTypes {
           release {
               resValue("string", "dotenv_filename", "")
           }
       }
   
       // ...
   }

   This code sets a resource value named dotenv_filename to an empty string for the release build type.

   Save the file and close the editor.

   In your Dart code, modify the load method call to load the .env file only if the dotenv_filename resource value is not empty:

   import 'package:flutter_dotenv/flutter_dotenv.dart';
   
   Future<void> main() async {
     // Load the environment variables from the .env file
     if (dotenv.env['dotenv_filename'] != '') {
       await dotenv.load();
     }
   
     // Use the environment variables in your code
     final apiKey = dotenv.env['MY_API_KEY'];
     final apiUrl = dotenv.env['API_BASE_URL'];
   
     // ...
   }

   This code checks if the dotenv_filename resource value is not empty before loading the .env file.

   With these modifications, the .env file will be excluded only for the release build type, and will be loaded for all other build types (e.g. debug, profile).
2. govarthananve commented on May 13, 2023

   

   govarthananve

   on May 13, 2023

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   Don't forget to add assets for the env files in pubspec.yaml

   assets:
       - .env
       - .env.dev
       - .env.stg
       - .env.prd
   

   Create "environment.dart" file any whare in project

   import 'dart:core';
   
   import 'package:flutter_dotenv/flutter_dotenv.dart';
   
   class Environment {
     static const env = String.fromEnvironment('ENV');
      String get envFileName {
       switch (env) {
         case 'dev': // flutter run --dart-define=ENV=dev
           return '.env.dev';
         case 'stg': // flutter run --dart-define=ENV=stg
           return '.env.stg';
         case 'prd': // flutter run --dart-define=ENV=prd
           return '.env.prd';
         default:
           return '.env';
       }
     }
   }
   

   In main.dart file

   import 'package:flutter_dotenv/flutter_dotenv.dart';
   import 'package:sos/src/utils/environment.dart';
   

   Future<void> main() async {
     if (kDebugMode) {
       print(Environment.envFileName);
     }
     await dotenv.load(fileName: Environment.envFileName);
     runApp(const MyApp());
   }
   

   While running the project and taking build time you need to use --dart-define=ENV=prd
   flutter run --dart-define=ENV=prd
   That's It It will work as you expect

   Reacted by Harshit Kumar
3. dirablue commented on Jul 5, 2023

   

   dirablue

   on Jul 5, 2023

   Author

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   @Vedsaga
   Thank you for telling your solution.
   I wanted how to do on only dart / flutter. but maybe it's impossible?

   @govarthananve
   Thank you for your comment.
   But it's not solution for that thing. because all of env files will be saved in assets of flutter.

   the reason I wanted to exlude env files is for the security.
4. dirablue commented on Jul 5, 2023

   

   dirablue

   on Jul 5, 2023

   Author

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   I found the best solution.

   using obfuscated env source code isntead of .env file with https://pub.dev/packages/envied.
   https://codewithandrea.com/articles/flutter-api-keys-dart-define-env-files/