fix(eslint-plugin): [consistent-type-exports] check value flag before resolving alias

[ntdiary]

PR Checklist

• Addresses an existing open issue: fixes Bug: [consistent-type-exports] Importing a shadowing type breaks consistent-type-exports #11761
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

Make sure the current symbol doesn't have SymbolFlags.Value before resolving alias.

I submit the recursive version here, which is just 1 line shorter than the while iteration.
If we prefer using iteration, can be done like this:

while (symbol && !checker.isUnknownSymbol(symbol)) {
  if (
    symbol.getDeclarations()?.some(ts.isTypeOnlyImportOrExportDeclaration)
  ) {
    return true;
  }
  if (symbol.flags & ts.SymbolFlags.Value) {
    return false;
  }
  if (!(symbol.flags & ts.SymbolFlags.Alias)) {
    return true;
  }
  symbol = checker.getImmediateAliasedSymbol(symbol)
}
return undefined;

💖

[typescript-eslint]

Thanks for the PR, @ntdiary!

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The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

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---

☁️ Nx Cloud last updated this comment at 2025-11-26 07:06:12 UTC

[ntdiary]

replace getAliasedSymbol with getImmediateAliasedSymbol.
Because the latter can handle this case as well:

// a.ts
export const NAME = 1;
export type NAME = 1;
// b.ts
import { type NAME as Foo } from './a';
export { Foo };

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.49%. Comparing base (17601fc) to head (3e7a944).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #11769   +/-   ##
=======================================
  Coverage   90.49%   90.49%           
=======================================
  Files         522      522           
  Lines       53357    53359    +2     
  Branches     8909     8911    +2     
=======================================
+ Hits        48284    48286    +2     
  Misses       5057     5057           
  Partials       16       16           

Flag	Coverage Δ
unittest	90.49% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
...eslint-plugin/src/rules/consistent-type-exports.ts	96.00% <100.00%> (+0.02%)	⬆️

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[JoshuaKGoldberg]

LGTM, thanks for the quick fix!

Normally we try to wait a full week for changes to give @typescript-eslint/triage-team a chance to review. But since this is a fast follow and our weekly release is in a few hours, I'd like to merge today. FYI team

[JoshuaKGoldberg]

I ended up not having time to merge this in for the Monday release this week. Will leave open.