rc

Description:

rc

RC #
RC is a configuration/collection manager that uses . (dot) to set and read collection contents. And it is designed with loaders to load collections from various locations such as environment variables.
RC's name uses the acronym of Runtime Configure/Real Collection. You can use it as a collection container, and you can also use it as a configuration manager with a loader.

What is a collection? Collection is a concept, usually Map/List/Set/Iterable are all collections.

Installation #
Use command line:
dart pub add rc
copied to clipboard
Or update your pubspec.yaml file:
dependencies:
rc: latest
copied to clipboard
Quick Start #
import 'package:rc/rc.dart';

final config = RC(init: {
'app': {
debug: true,
}
});

// A more concise approach 👇
// final config = RC(init: {'app.debug': true});

print(config('app.debug')); // true
copied to clipboard
Parameters:



Name
Type
Notes




init
Map<String, dynamic>?
Initial collection data


loaders
Set<Loader>?
Loader used


shouldWarn
bool
Whether to allow warning information, default true



Get data or collection #
To get data, we use the call method. Usually you can ignore it. You can use the created RC instance in a similar way to function call:
final value = config('app.debug');
copied to clipboard
It also has a type parameter T, which can tell the getter what data type you expect:
final debug = config<bool>('app.debug');
copied to clipboard

Note: If the app.debug data type is not bool, it will return null. If shouldWarn is configured as true, a warning message will be printed in the console.

In addition to getting specific values, you can also get collection values ​​with Map<String, dynamic> type:
final app = config('app'); // {debug: true}
copied to clipboard
Set a value or collection #
Setting a value usually uses the set method, which can update a specific value or set a new collection:
// Sets a value
config.set('app.debug', 1);

// Sets a collection
config.set('user.profile', {
'id': 1,
'name': 'Seven',
});
copied to clipboard
Collection values ​​also support . connected collections, or a mixture of Map/Set/List/Iterable and . collections:
config.set('app.user', {
id: 1,
'emails.0': {id: 1, validated: true},
'prifile': {
'id': 1,
'posts': [
{id: 1, title: 'First post'},
{id: 2, title: 'Post 2'},
],
},
});
copied to clipboard
In short, you can combine collection types in any way you want.
Update a value or collection #
Updating a value or collection is usually a syntactic sugar for the combination of call and set, which allows you to get the previous data for processing before updating the value:
config.update<bool>('app.debug', (prev) {
if (prev == true) return prev;
return false;
});
copied to clipboard
Delete a value or collection #
To delete a value or collection, use the delete method:
// Delete a value
config.delete('app.debug');

// Delete colection
config.delete('app');
copied to clipboard
Whether contains #
To determine whether a value or collection exists, you should use the contains method:
config.contains('app');
config.contains('app.debug');
copied to clipboard
Loaders #
Loaders are used to load collections from other places into RC, such as dart --define or environment variables.
There are two ways to configure loaders. The first is to set loaders when creating RC. You can also use use to configure loaders after creating an RC instance:
config.use(const DefineLoader());
copied to clipboard
Built-in loaders:



Loader
Desc




DefineLoader
KV environment variables configured using --define in the Dart/Flutter command line


EnvironmentLoader
System environment variable loader, usually loads Platform.environment content. On platforms that do not support dart:io, no data will be loaded. Because there are no environment variables on platforms that do not support dart:io.


DotenvLoader
Load environment variable files into collections, and load .env files by default. .env is a commonly used KV format configuration file. You can also configure the search directory, or other KV configuration files in compatible formats.

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

Share

• Share on Facebook
• Share on Twitter