feat(linter/no-unused-vars): support ignoreUsingDeclarations option

[camc314]

fixes #14628

[camc314]

• feat(linter/no-unused-vars): support ignoreUsingDeclarations option #14632 👈 (View in Graphite)
• main

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[Copilot]

Pull Request Overview

This PR adds support for the ignoreUsingDeclarations option to the no-unused-vars ESLint rule. This option allows unused variables declared with using or await using (explicit resource management) to be ignored, which is useful when the primary purpose is the disposal side effect rather than using the resource itself.

Key changes:

• Added the ignoreUsingDeclarations boolean option to the rule configuration
• Implemented logic to skip linting unused variables when they are using declarations and the option is enabled
• Added comprehensive tests covering both using and await using declarations

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
crates/oxc_linter/src/rules/eslint/no_unused_vars/options.rs	Added ignore_using_declarations field to options struct with documentation and parsing logic
crates/oxc_linter/src/rules/eslint/no_unused_vars/allowed.rs	Implemented the core logic to ignore using declarations when option is enabled
crates/oxc_linter/src/rules/eslint/no_unused_vars/tests/oxc.rs	Added tests for the new option with both using and await using cases
crates/oxc_linter/src/rules/eslint/no_unused_vars/tests/eslint.rs	Extended test coverage with additional test cases for using declarations
crates/oxc_linter/src/snapshots/eslint_no_unused_vars@oxc-vars-using.snap	Updated test snapshots showing expected warnings for await using
crates/oxc_linter/src/snapshots/eslint_no_unused_vars@eslint.snap	Updated comprehensive test snapshots with new test cases

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[graphite-app]

Merge activity

• Oct 15, 3:42 PM UTC: camc314 added this pull request to the Graphite merge queue.
• Oct 15, 3:46 PM UTC: Merged by the Graphite merge queue.

[codspeed-hq]

CodSpeed Performance Report

Merging #14632 will not alter performance

_{Comparing c/10-15-feat_linter_no-unused-vars_support_ignoreusingdeclarations_option (9cd7a67) with main (84b2605)¹}

Summary

✅ 4 untouched
⏩ 33 skipped²

Footnotes

1. No successful run was found on main (9cd7a67) during the generation of this report, so 84b2605 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 33 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩