A fluent, builder-based library for generating valid Dart code.
code_builder has a narrow and user-friendly API.
See the example and test folders for additional examples.
For example creating a class with a method:
import 'package:code_builder/code_builder.dart';
import 'package:dart_style/dart_style.dart';
void main() {
final animal = Class((b) => b
..name = 'Animal'
..extend = refer('Organism')
..methods.add(Method.returnsVoid((b) => b
..name = 'eat'
..body = const Code("print('Yum!');"))));
final emitter = DartEmitter();
print(DartFormatter().format('${animal.accept(emitter)}'));
}Outputs:
class Animal extends Organism {
void eat() => print('Yum!');
}Have a complicated set of dependencies for your generated code? code_builder
supports automatic scoping of your ASTs to automatically use prefixes to avoid
symbol conflicts:
import 'package:code_builder/code_builder.dart';
import 'package:dart_style/dart_style.dart';
void main() {
final library = Library((b) => b.body.addAll([
Method((b) => b
..body = const Code('')
..name = 'doThing'
..returns = refer('Thing', 'package:a/a.dart')),
Method((b) => b
..body = const Code('')
..name = 'doOther'
..returns = refer('Other', 'package:b/b.dart')),
]));
final emitter = DartEmitter.scoped();
print(DartFormatter().format('${library.accept(emitter)}'));
}Outputs:
import 'package:a/a.dart' as _i1;
import 'package:b/b.dart' as _i2;
_i1.Thing doThing() {}
_i2.Other doOther() {}- Read and help us document common patterns over at the wiki.
- Is there a bug in the code? File an issue.
If a feature is missing (the Dart language is always evolving) or you'd like an easier or better way to do something, consider opening a pull request. You can always file an issue, but generally speaking feature requests will be on a best-effort basis.
NOTE: Due to the evolving Dart SDK the local
dartfmtmust be used to format this repository. You can run it simply from the command-line:$ pub run dart_style:format -w .
NOTE: There is currently a limitation in
build_runnerthat requires a workaround for developing this package. We expect this to be unnecessary in the future.
Use build_runner:
$ pub global activate build_runner
$ mv build.disabled.yaml build.yaml
$ pub global run build_runner build --delete-conflicting-outputs
$ mv build.yaml build.disabled.yaml
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