99 lines
2.7 KiB
Markdown
99 lines
2.7 KiB
Markdown
# Angel Configuration
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[](https://pub.dartlang.org/packages/angel_configuration)
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[](https://travis-ci.org/angel-dart/configuration.svg)
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Automatic YAML configuration loader for Angel.
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# About
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Any web app needs different configuration for development and production. This plugin will search
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for a `config/default.yaml` file. If it is found, configuration from it is loaded into `app.properties`.
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Then, it will look for a `config/$ANGEL_ENV` file. (i.e. config/development.yaml). If this found, all of its
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configuration be loaded, and will override anything loaded from the `default.yaml` file. This allows for your
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app to work under different conditions without you re-coding anything. :)
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# Installation
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In `pubspec.yaml`:
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```yaml
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dependencies:
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angel_configuration: ^1.0.0
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```
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# Usage
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**Example Configuration**
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```yaml
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# Define normal YAML objects
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some_key: foo
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this_is_a_map:
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a_string: "string"
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another_string: "string"
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```
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You can also load configuration from the environment:
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```yaml
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# Loaded from the environment
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system_path: $PATH
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```
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If a `.env` file is present in your configuration directory, then it will be loaded before
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applying YAML configuration.
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**Server-side**
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Call `loadConfigurationFile()`. The loaded properties will be available in your application's
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`properties` map, which means you can access them like normal instance members.
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```dart
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main() {
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print(app.foo == app.properties['foo']); // true
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}
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```
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An instance of `Configuration` will also be injected to your application, and it works
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the same way:
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```dart
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import 'dart:io';
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import 'package:angel_framework/angel_framework.dart';
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import 'package:angel_configuration/angel_configuration.dart';
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main() async {
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Angel angel = new Angel();
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angel.configure(loadConfigurationFile()); // It's that easy!
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app.get('/foo', (Configuration config) {
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return config.some_key;
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});
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}
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```
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`loadConfigurationFile` also accepts a `sourceDirectory` or `overrideEnvironmentName` parameter.
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The former will allow you to search in a directory other than `config`, and the latter lets you
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override `$ANGEL_ENV` by specifying a specific configuration name to look for (i.e. `production`).
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**In the Browser**
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You can easily load configuration values within your client-side app,
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and they will be automatically replaced by a Barback transformer.
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In your `pubspec.yaml`:
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```yaml
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transformers:
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- angel_configuration
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```
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In your app:
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```dart
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import 'package:angel_configuration/browser.dart';
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main() async {
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print(config("some_key.other.nested_key"));
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}
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```
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You can also provide a `dir` or `env` argument, corresponding to
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the ones on the server-side.
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