46 lines
1.7 KiB
Markdown
46 lines
1.7 KiB
Markdown
# Jael Ppreprocessor
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[](https://dart.dev/null-safety)
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[](https://gitter.im/angel_dart/discussion)
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[](https://github.com/dart-backend/angel/tree/master/packages/jael/jael_preprocessor/LICENSE)
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A pre-processor for resolving blocks and includes within [Jael 3](https://pub.dev/packages/jael3) templates.
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## Installation
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In your `pubspec.yaml`:
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```yaml
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dependencies:
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jael3_prepreprocessor: ^8.0.0
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```
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## Usage
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It is unlikely that you will directly use this package, as it is more of an implementation detail than a requirement. However, it is responsible for handling `include` and `block` directives (template inheritance), so you are a package maintainer and want to support Jael, read on.
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To keep things simple, just use the `resolve` function, which will take care of inheritance for you.
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```dart
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import 'package:jael3_preprocessor/jael3_preprocessor.dart' as jael;
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myFunction() async {
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var doc = await parseTemplateSomehow();
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var resolved = await jael.resolve(doc, dir, onError: (e) => doSomething());
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}
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```
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You may occasionally need to manually patch in functionality that is not available through the official Jael packages. To achieve this, simply provide an `Iterable` of `Patcher` functions:
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```dart
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myOtherFunction(jael.Document doc) {
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return jael.resolve(doc, dir, onError: errorHandler, patch: [
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syntactic(),
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sugar(),
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etc(),
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]);
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}
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```
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**This package uses `package:file`, rather than `dart:io`.**
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