feat: lint default constructor only

Author: xJac0b

lib/src/lints/avoid_using_api/avoid_using_api_linter.dart

@@ -19,6 +19,9 @@ class AvoidUsingApiLinter {
     required this.config,
   });
 
+  /// The identifier for the default constructor
+  static const String defaultConstructorIdentifier = '()';
+
   /// Access to the resolver for this lint context
   final CustomLintResolver resolver;
 
@@ -190,6 +193,11 @@ class AvoidUsingApiLinter {
     String className,
     String source,
   ) {
+    if (identifier == defaultConstructorIdentifier) {
+      _banDefaultConstructor(className, source, entryCode);
+      return;
+    }
+
     context.registry.addSimpleIdentifier((node) {
       final name = node.name;
       if (name != identifier) {
@@ -280,4 +288,25 @@ class AvoidUsingApiLinter {
       reporter.atNode(node.identifier, entryCode);
     });
   }
+
+  void _banDefaultConstructor(
+    String className,
+    String source,
+    LintCode entryCode,
+  ) {
+    context.registry.addInstanceCreationExpression((node) {
+      final constructorName = node.constructorName.type.name2.lexeme;
+      if (constructorName != className || node.constructorName.name != null) {
+        return;
+      }
+
+      final sourcePath =
+          node.constructorName.type.element2?.library2?.uri.toString();
+      if (sourcePath == null || !_matchesSource(sourcePath, source)) {
+        return;
+      }
+
+      reporter.atNode(node, entryCode);
+    });
+  }
 }

lint_test/avoid_using_api/identifier_class_source_ban/analysis_options.yaml

@@ -7,6 +7,10 @@ custom_lint:
     - avoid_using_api:
       severity: warning
       entries:
+        - identifier: ()
+          class_name: BannedCodeUsage
+          source: package:external_source
+          reason: "BannedCodeUsage() from package:external_source is not allowed"
         - identifier: test4
           class_name: BannedCodeUsage
           source: package:external_source

lint_test/avoid_using_api/identifier_class_source_ban/lib/identifier_class_source_ban_test.dart

@@ -5,6 +5,7 @@ import 'dart:collection';
 import 'package:external_source/external_source.dart';
 
 void testingBannedCodeLint() async {
+  // expect_lint: avoid_using_api
   final bannedCodeUsage = BannedCodeUsage();
   // expect_lint: avoid_using_api
   BannedCodeUsage.test2();