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Build your app config via code generation from .json files in a type safe way

Pub Package

config_builder #

Build your app config via code generation from .json files. Type-Safe and no unnecessary IO/Parsing on app-startup!

Features #

  • Avoid storing your configuration in dart files
  • Avoid reading config files from disk and parsing them at app start
  • Type safe
  • Supports String, bool, int, double and Enums

How to use #

Add to your devDependencies (see example):

dev_dependencies:
  build_runner: <version>
  config_builder: <version>

Define your configuration model:

part 'config.g.dart'; //use the <filename>.g.dart, where <filename> is the name of this dart file

@BuildConfiguration([
  ConfigFile(configName: "devConfig", path: "lib/secrets/config.dev.json"),
  ConfigFile(configName: "testConfig", path: "lib/secrets/config.test.json"),
])
class Config{
  final String name;
  final int value;
  final Environment environment;

  const Config({this.name, this.value, this.environment});
}

Make sure the config-class has a const constructor with exclusively named parameters. The generated code will assume that such a constructor exists.

Add your configuration-json file (must be saved in the lib/ directory):

{
  "name" : "devApp",
  "value": 1,
  "environment" : "Dev"
}

Run the code generation via

flutter packages pub run build_runner build

(flutter projects)
or

 pub run build_runner build 

(dart-only projects)

Now you can access your config object for example via different entry points in your app:

main.dev.dart:

import 'config.dart';

void main() => printConfig(devConfig);

main.test.dart:

import 'config.dart';

void main() => printConfig(testConfig);
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Build your app config via code generation from .json files in a type safe way

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License

unknown (LICENSE)

Dependencies

analyzer, build, glob, source_gen

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