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avoid-duplicate-named-imports

Group: Correctness
Path: lint/correctness/avoid-duplicate-named-imports
Default: Off, opt in
Origin: Falcon
Rule: 53 of 512

Flags imports of the same library that differ only in their name prefix. Conditional URIs, deferred loading, combinators, and metadata must match. Consolidate uses under one import before removing the other directive.

Invalid

example.dartdart

import 'a.dart' as first;
import 'a.dart' as second;
import 'b.dart';
import 'b.dart' as b;
import 'c.dart' as c;
import 'c.dart';
import 'd.dart' as d show D;
import 'd.dart' as other show D;
import 'e.dart' deferred as e;
import 'e.dart' deferred as otherE;
import 'f.dart' if (dart.library.io) 'io.dart' as f;
import 'f.dart' if (dart.library.io) 'io.dart' as otherF;

This library is already imported with the same visibility — consolidate uses under one import and remove the duplicate.

1import 'a.dart' as first;

2import 'a.dart' as second;

∙

This library is already imported with the same visibility — consolidate uses under one import and remove the duplicate.

3import 'b.dart';

4import 'b.dart' as b;

∙

This library is already imported with the same visibility — consolidate uses under one import and remove the duplicate.

5import 'c.dart' as c;

6import 'c.dart';

∙

This library is already imported with the same visibility — consolidate uses under one import and remove the duplicate.

7import 'd.dart' as d show D;

8import 'd.dart' as other show D;

∙

This library is already imported with the same visibility — consolidate uses under one import and remove the duplicate.

9import 'e.dart' deferred as e;

10import 'e.dart' deferred as otherE;

∙

This library is already imported with the same visibility — consolidate uses under one import and remove the duplicate.

11import 'f.dart' if (dart.library.io) 'io.dart' as f;

12import 'f.dart' if (dart.library.io) 'io.dart' as otherF;

∙

Valid

example.dartdart

import 'a.dart' as same;
import 'b.dart' as same;
import 'c.dart' as c show A;
import 'c.dart' as otherC show B;
import 'd.dart' as d hide A;
import 'd.dart' as otherD hide B;
import 'e.dart' as e;
import 'e.dart' deferred as otherE;
import 'f.dart' if (dart.library.io) 'io.dart' as f;
import 'f.dart' if (dart.library.html) 'html.dart' as otherF;
import 'g.dart' if (dart.library.io) 'one.dart' as g;
import 'g.dart' if (dart.library.io) 'two.dart' as otherG;
import 'plain.dart';
import 'plain.dart';

Configure avoid-duplicate-named-imports

Set its severity in falcon.json. See the configuration guide.

falcon.jsonjson

{
  "linter": {
    "rules": {
      "correctness": {
        "avoid-duplicate-named-imports": "error"
      }
    }
  }
}

Or silence one occurrence with a suppression comment; the reason is required.

example.dartdart

// falcon-ignore lint/correctness/avoid-duplicate-named-imports: <reason>

avoid-duplicate-switch-case-conditionsrecommended
Flags repeated when guards on syntactically identical switch patterns.
avoid-duplicate-test-assertionsrecommendedtest
Reports repeated identical, side-effect-free assertions in a straight-line block.
avoid-dynamic-callsavoid_dynamic_callsrecommended
Avoid method calls or property accesses on a dynamic target.
avoid-emit-outside-blocrecommendedbloc
Flags external calls and tear-offs of a Bloc or Cubit's emit method.
avoid-empty-setstaterecommendedflutter
Avoid setState callbacks with empty block bodies.
avoid-empty-test-groupstest
Reports inline framework groups without any test registrations.
avoid-global-stateavoid-global-state
Disallow mutable global and static state.
avoid-hooks-outside-buildrecommendedflutter_hooks
Flags confirmed Flutter hooks outside hook builds, custom hooks, and HookBuilder/HookConsumer builders.