| // Copyright (c) 2015, 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. |
| |
| import 'package:analyzer/dart/ast/ast.dart'; |
| import 'package:analyzer/dart/ast/visitor.dart'; |
| |
| import '../analyzer.dart'; |
| import '../utils.dart'; |
| |
| const _desc = |
| r'Use `lowercase_with_underscores` when specifying a library prefix.'; |
| |
| const _details = r''' |
| |
| **DO** use `lowercase_with_underscores` when specifying a library prefix. |
| |
| **GOOD:** |
| ``` |
| import 'dart:math' as math; |
| import 'dart:json' as json; |
| import 'package:js/js.dart' as js; |
| import 'package:javascript_utils/javascript_utils.dart' as js_utils; |
| ``` |
| |
| **BAD:** |
| ``` |
| import 'dart:math' as Math; |
| import 'dart:json' as JSON; |
| import 'package:js/js.dart' as JS; |
| import 'package:javascript_utils/javascript_utils.dart' as jsUtils; |
| ``` |
| |
| '''; |
| |
| class LibraryPrefixes extends LintRule implements NodeLintRule { |
| LibraryPrefixes() |
| : super( |
| name: 'library_prefixes', |
| description: _desc, |
| details: _details, |
| group: Group.style); |
| |
| @override |
| void registerNodeProcessors( |
| NodeLintRegistry registry, LinterContext context) { |
| final visitor = _Visitor(this); |
| registry.addImportDirective(this, visitor); |
| } |
| } |
| |
| class _Visitor extends SimpleAstVisitor<void> { |
| final LintRule rule; |
| |
| _Visitor(this.rule); |
| |
| @override |
| void visitImportDirective(ImportDirective node) { |
| if (node.prefix != null && !isValidLibraryPrefix(node.prefix.toString())) { |
| rule.reportLint(node.prefix); |
| } |
| } |
| } |