refactor: extract case-sensitive check to plugin

[LingyuCoder]

Summary

relate to web-infra-dev/rslib#1401

This PR refactors the case-sensitive checking logic by extracting it from the compiler core into a dedicated plugin. The has been renamed to and now handles both module and asset case-sensitive checks in a unified way.

The main changes include:

• Renamed to for better clarity
• Moved case-sensitive asset check logic from compiler to plugin
• Plugin now handles both module case-sensitive warnings (in hook) and asset case-sensitive warnings (in hook)
• Updated test cases to use the new plugin API

This refactoring improves code organization by separating concerns and makes the case-sensitive checking functionality more modular and easier to maintain.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Copilot]

Pull request overview

This PR refactors the case-sensitive checking logic by extracting it from the compiler core into a dedicated plugin. The WarnCaseSensitiveModulesPlugin has been renamed to CaseSensitivePlugin and now handles both module and asset case-sensitive checks in a unified way.

• Renamed plugin from WarnCaseSensitiveModulesPlugin to CaseSensitivePlugin with backward compatibility alias
• Moved asset case-sensitive check logic from compiler's emit_assets method to the plugin's emit hook
• Plugin now handles both module warnings (in compilation.seal hook) and asset warnings (in compiler.emit hook)

Reviewed changes

Copilot reviewed 12 out of 15 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
crates/rspack_plugin_case_sensitive/src/lib.rs	Renamed struct, added CompilerEmit hook handler for asset checking, and new create_sensitive_assets_warning method
crates/rspack_plugin_case_sensitive/Cargo.toml	Updated package name and description, added itertools dependency
crates/rspack_core/src/compiler/mod.rs	Removed inline asset case-sensitive checking logic and related imports
crates/rspack_binding_api/src/raw_options/raw_builtins/mod.rs	Updated plugin enum name and import references
crates/rspack_binding_api/Cargo.toml	Updated dependency name from rspack_plugin_warn_sensitive_module to rspack_plugin_case_sensitive
crates/node_binding/napi-binding.d.ts	Updated TypeScript type definition for enum value
Cargo.toml	Updated workspace dependency name
Cargo.lock	Reflected dependency name changes
packages/rspack/src/builtin-plugin/CaseSensitivePlugin.ts	Renamed export from WarnCaseSensitiveModulesPlugin to CaseSensitivePlugin
packages/rspack/src/builtin-plugin/index.ts	Updated export to reference new plugin file
packages/rspack/src/exports.ts	Exported CaseSensitivePlugin with backward compatibility alias as WarnCaseSensitiveModulesPlugin
packages/rspack/etc/core.api.md	Updated API documentation to reflect plugin rename and alias
tests/rspack-test/errorCases/error-case-sensitive.js	Updated diagnostic code in test expectation from "Sensitive Modules Warn" to "Sensitive Warn"
tests/rspack-test/configCases/errors/case-emit/rspack.config.js	Added test configuration that explicitly uses CaseSensitivePlugin
tests/rspack-test/configCases/errors/case-emit/warnings.js	Added test expectations for asset case-sensitive warnings

Comments suppressed due to low confidence (1)

crates/rspack_plugin_case_sensitive/src/lib.rs:143

• The comment is outdated and incomplete. It only mentions case sensitive modules and the compilation.seal hook, but the plugin now also handles case sensitive assets in the compiler.emit hook. The comment should be updated to reflect both functionalities.

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[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 projects in monorepo, 1 project with changes.

📊 Quick Summary

Project	Total Size	Change
react-10k	5.7 MB	0
react-1k	823.4 KB	0
react-5k	2.7 MB	0
rome	984.3 KB	0
ui-components	2.1 MB	+474.0 B (0.0%)

📋 Detailed Reports (Click to expand)

📁 ui-components

Path: ../build-tools-performance/cases/ui-components/dist/rsdoctor-data.json

📌 Baseline Commit: 769e045fc8 | PR: #12529

Metric	Current	Baseline	Change
📊 Total Size	2.1 MB	2.1 MB	+474.0 B (0.0%)
📄 JavaScript	2.0 MB	2.0 MB	+474.0 B (0.0%)
🎨 CSS	83.0 KB	83.0 KB	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: ui-components Bundle Diff

Generated by Rsdoctor GitHub Action

[github-actions]

📦 Binary Size-limit

Comparing 990f6b3 to fix: optimize CSS runtime requirements logic (#12529) by harpsealjs

❌ Size increased by 2.88KB from 47.87MB to 47.87MB (⬆️0.01%)

[codspeed-hq]

CodSpeed Performance Report

Merging #12532 will not alter performance

_{Comparing refactor/extract-case-sensitive-check-to-plugin (990f6b3) with main (769e045)}

Summary

✅ 16 untouched
⏩ 1 skipped¹

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩