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Matan Lurey
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analyzer: | ||
strong-mode: true | ||
linter: | ||
rules: | ||
# Errors | ||
- avoid_empty_else | ||
- control_flow_in_finally | ||
- empty_statements | ||
- test_types_in_equals | ||
- throw_in_finally | ||
- valid_regexps | ||
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# Style | ||
- annotate_overrides | ||
- avoid_init_to_null | ||
- avoid_return_types_on_setters | ||
- await_only_futures | ||
- camel_case_types | ||
- comment_references | ||
- empty_catches | ||
- empty_constructor_bodies | ||
- hash_and_equals | ||
- library_prefixes | ||
- non_constant_identifier_names | ||
- prefer_is_not_empty | ||
- slash_for_doc_comments | ||
- type_init_formals | ||
- unrelated_type_equality_checks |
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.packages | ||
.pub | ||
pubspec.lock |
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import 'package:source_transformer/source_transformer.dart'; | ||
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/// Remove all duplicate imports and exports in a set of files. | ||
/// | ||
/// Simple but useful example of consuming a source transformer. | ||
/// | ||
/// ## Example use | ||
/// ``` | ||
/// $ dart bin/deduplicate.dart /some/path.dart /some/other/path.dart ... | ||
/// ``` | ||
main(List<String> paths) async { | ||
await runTransformer(const DeduplicateDirectives(), paths); | ||
} |
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export 'package:source_transformer/src/cli.dart' show runTransformer; | ||
export 'package:source_transformer/src/dart/directives.dart' | ||
show | ||
DeduplicateDirectives, | ||
DirectiveTransformer, | ||
RemoveDirectives, | ||
ReplaceDirectives; | ||
export 'package:source_transformer/src/patch.dart' show Patch; | ||
export 'package:source_transformer/src/phase.dart' show Phase; | ||
export 'package:source_transformer/src/transformer.dart' | ||
show DartSourceTransformer, Transformer; |
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// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | ||
// for details. All rights reserved. Use of this source code is governed by a | ||
// BSD-style license that can be found in the LICENSE file. | ||
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import 'dart:async'; | ||
import 'dart:io'; | ||
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import 'package:source_span/source_span.dart'; | ||
import 'package:source_transformer/source_transformer.dart'; | ||
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/// Convenience function to run a [transformer] on the provided file [paths]. | ||
/// | ||
/// See `bin/deduplicate.dart` for an example. | ||
Future runTransformer( | ||
Transformer transformer, | ||
Iterable<String> paths, | ||
) { | ||
return Future.wait(paths.map((path) async { | ||
final input = new File(path); | ||
final sourceText = input.readAsStringSync(); | ||
final oldFile = new SourceFile(sourceText, url: path); | ||
final newFile = await transformer.transform(oldFile); | ||
input.writeAsStringSync(newFile.getText(0)); | ||
})); | ||
} |
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// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | ||
// for details. All rights reserved. Use of this source code is governed by a | ||
// BSD-style license that can be found in the LICENSE file. | ||
library source_transformer.src.dart.directives; | ||
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import 'package:analyzer/analyzer.dart'; | ||
import 'package:analyzer/dart/ast/standard_ast_factory.dart'; | ||
import 'package:analyzer/dart/ast/token.dart'; | ||
import 'package:analyzer/src/dart/ast/token.dart'; | ||
import 'package:collection/collection.dart'; | ||
import 'package:meta/meta.dart'; | ||
import 'package:source_transformer/source_transformer.dart'; | ||
import 'package:source_transformer/src/utils.dart'; | ||
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part 'directives/equality.dart'; | ||
part 'directives/transformer.dart'; | ||
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/// A transformer that removes duplicate import and export directives. | ||
/// | ||
/// The default implementation of `Equality<Directive>` only attempts to remove | ||
/// directives without deferred loading, an `as` statement, or the `show` and | ||
/// `hide` combinators. | ||
/// | ||
/// An ideal transformer to run after refactoring directives. | ||
class DeduplicateDirectives extends DirectiveTransformer<Set<Directive>> { | ||
final Equality<Directive> _equality; | ||
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@literal | ||
const DeduplicateDirectives({ | ||
Equality<Directive> equality: const DirectiveEquality(), | ||
}) | ||
: _equality = equality; | ||
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@override | ||
bool canTransform(Directive directive) { | ||
if (directive is ImportDirective) { | ||
return directive.asKeyword == null && | ||
directive.deferredKeyword == null && | ||
directive.combinators == null || | ||
directive.combinators.isEmpty; | ||
} | ||
if (directive is ExportDirective) { | ||
return directive.combinators == null || directive.combinators.isEmpty; | ||
} | ||
return false; | ||
} | ||
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@override | ||
Set<Directive> defaultState() => new EqualitySet<Directive>(_equality); | ||
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@override | ||
Directive transformDirective(Directive directive, [Set<Directive> state]) { | ||
return state.add(directive) ? directive : null; | ||
} | ||
} | ||
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/// A source transformer that removes directives that reference certain URIs. | ||
/// | ||
/// If a URI is not found, it is skipped. | ||
/// | ||
/// ## Example use | ||
/// ``` | ||
/// const RemoveDirectives([ | ||
/// 'package:a/a.dart', | ||
/// 'package:b/b.dart', | ||
/// ]) | ||
/// ``` | ||
class RemoveDirectives extends DirectiveTransformer<Null> { | ||
final Iterable<String> _uris; | ||
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@literal | ||
const RemoveDirectives(this._uris); | ||
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@mustCallSuper | ||
@override | ||
bool canTransform(Directive directive) { | ||
if (directive is UriBasedDirective) { | ||
return _uris.contains(directive.uri.stringValue); | ||
} | ||
return false; | ||
} | ||
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@override | ||
Directive transformDirective(@checked UriBasedDirective directive, [_]) { | ||
return null; | ||
} | ||
} | ||
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/// A source transformer that replaces directives with other URIs. | ||
/// | ||
/// ## Example use | ||
/// ``` | ||
/// const ReplaceDirectives({ | ||
/// 'package:a/a.dart': 'package:b/b.dart', | ||
/// }) | ||
/// ``` | ||
class ReplaceDirectives extends DirectiveTransformer<Null> { | ||
final Map<String, String> _uris; | ||
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const ReplaceDirectives(this._uris); | ||
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@mustCallSuper | ||
@override | ||
bool canTransform(Directive directive) { | ||
if (directive is UriBasedDirective) { | ||
return _uris.containsKey(directive.uri.stringValue); | ||
} | ||
return false; | ||
} | ||
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@override | ||
Directive transformDirective(@checked UriBasedDirective directive, [_]) { | ||
final newUri = _uris[directive.uri.stringValue]; | ||
if (newUri != null) { | ||
return cloneNode(directive) | ||
..uri = astFactory.simpleStringLiteral( | ||
new StringToken(TokenType.STRING, "'$newUri'", 0), | ||
"'$newUri'", | ||
); | ||
} | ||
return directive; | ||
} | ||
} |
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// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | ||
// for details. All rights reserved. Use of this source code is governed by a | ||
// BSD-style license that can be found in the LICENSE file. | ||
part of source_transformer.src.dart.directives; | ||
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class DirectiveEquality implements Equality<Directive> { | ||
const DirectiveEquality(); | ||
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@override | ||
bool equals(Directive e1, Directive e2) { | ||
if (e1 is ImportDirective && e2 is ImportDirective) { | ||
if (e1.asKeyword != null || | ||
e1.deferredKeyword != null || | ||
e1.combinators?.isNotEmpty == true || | ||
e2.asKeyword != null || | ||
e2.deferredKeyword != null || | ||
e2.combinators?.isNotEmpty == true) { | ||
// For now don't try to compare import directive properties. | ||
return false; | ||
} | ||
return e1.uri.stringValue == e2.uri.stringValue; | ||
} | ||
if (e1 is ExportDirective && e2 is ExportDirective) { | ||
if (e1.combinators?.isNotEmpty == true || | ||
e2.combinators?.isNotEmpty == true) { | ||
// For now don't try to compare import directive properties. | ||
return false; | ||
} | ||
return e1.uri.stringValue == e2.uri.stringValue; | ||
} | ||
return false; | ||
} | ||
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@override | ||
int hash(Directive e) => e.toSource().hashCode; | ||
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@override | ||
bool isValidKey(Object o) => o is Directive; | ||
} |
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// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | ||
// for details. All rights reserved. Use of this source code is governed by a | ||
// BSD-style license that can be found in the LICENSE file. | ||
part of source_transformer.src.dart.directives; | ||
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/// A high-level transformer for manipulating `import` and `export` directives. | ||
abstract class DirectiveTransformer<S> extends DartSourceTransformer { | ||
const DirectiveTransformer(); | ||
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/// Should return `true` if the directive should be altered. | ||
@protected | ||
bool canTransform(Directive directive); | ||
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/// Return a new default state object; optional. | ||
@protected | ||
S defaultState() => null; | ||
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@override | ||
Iterable<Patch> computePatches(CompilationUnit parsedSource) { | ||
final initialState = defaultState(); | ||
return parsedSource.directives.where(canTransform).map((oldDirective) { | ||
final newDirective = transformDirective(oldDirective, initialState); | ||
if (newDirective == null) { | ||
return new Patch.removeAst(oldDirective); | ||
} | ||
return new Patch.replaceAst(oldDirective, newDirective); | ||
}); | ||
} | ||
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/// Returns a new directive to replace [directive] with. | ||
/// | ||
/// May return back the _same_ directive to avoid doing anything, but if | ||
/// possible it is preferred to make this type of check in [canTransform]. | ||
/// | ||
/// If `null` is returned, indicates that directive should be removed. | ||
@protected | ||
Directive transformDirective(Directive directive, [S state]); | ||
} |
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