Tim Blasi
d0aceef4e0
Update summary: - Removes the need for resolution, gaining transform speed at the cost of some precision and ability to detect errors - Generates type registrations in the package alongside their declarations - Ensures that line numbers do not change in transformed user code
48 lines
1.7 KiB
Dart
48 lines
1.7 KiB
Dart
library angular2.src.transform.reflection_remover.transformer;
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import 'dart:async';
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import 'package:angular2/src/transform/common/logging.dart' as log;
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import 'package:angular2/src/transform/common/names.dart';
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import 'package:angular2/src/transform/common/options.dart';
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import 'package:barback/barback.dart';
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import 'remove_reflection_capabilities.dart';
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/// Transformer responsible for removing the import and instantiation of
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/// [ReflectionCapabilities].
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///
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/// The goal of this is to break the app's dependency on dart:mirrors.
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///
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/// This transformer assumes that [DirectiveProcessor] and [DirectiveLinker]
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/// have already been run and that a .ngDeps.dart file has been generated for
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/// [options.entryPoint]. The instantiation of [ReflectionCapabilities] is
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/// replaced by calling `setupReflection` in that .ngDeps.dart file.
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class ReflectionRemover extends Transformer {
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final TransformerOptions options;
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ReflectionRemover(this.options);
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@override
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bool isPrimary(AssetId id) => options.reflectionEntryPoint == id.path;
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@override
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Future apply(Transform transform) async {
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log.init(transform);
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try {
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var newEntryPoint = new AssetId(
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transform.primaryInput.id.package, options.entryPoint)
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.changeExtension(DEPS_EXTENSION);
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var assetCode = await transform.primaryInput.readAsString();
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transform.addOutput(new Asset.fromString(transform.primaryInput.id,
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removeReflectionCapabilities(
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assetCode, transform.primaryInput.id.path, newEntryPoint.path)));
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} catch (ex, stackTrace) {
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log.logger.error('Removing reflection failed.\n'
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'Exception: $ex\n'
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'Stack Trace: $stackTrace');
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}
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}
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}
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