fix: strip ANSI codes from ignoreWarnings messages

[chenjiahan]

Summary

• strip ANSI codes from ignoreWarnings messages via util.stripVTControlCharacters to ensure that ignoreWarnings can more easily match warning message.
• extract normalization function for ignoreWarnings option to make the code cleaner.

Related links

• resolve [Feature]: Strip ANSI color codes from ignoreWarnings messages #12434
• https://nodejs.org/api/util.html#utilstripvtcontrolcharactersstr

Checklist

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

[netlify]

✅ Deploy Preview for rspack canceled.

Name	Link
🔨 Latest commit	3ae4c52
🔍 Latest deploy log	https://app.netlify.com/projects/rspack/deploys/693c21ff0fdf800008bdbafa

[Copilot]

Pull request overview

This PR addresses issue #12434 by stripping ANSI/VT control characters from warning messages before matching them against ignoreWarnings patterns, and refactors the normalization logic for better code organization.

• Adds ANSI code stripping in IgnoreWarningsPlugin using Node.js's util.stripVTControlCharacters
• Extracts ignoreWarnings normalization logic into a standalone function
• Preserves warning objects by creating shallow copies with stripped messages

Reviewed changes

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

File	Description
packages/rspack/src/lib/IgnoreWarningsPlugin.ts	Imports util module and strips VT control characters from warning messages before pattern matching
packages/rspack/src/config/normalization.ts	Extracts normalizeIgnoreWarnings function to improve code organization and maintainability

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[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 project(s) in monorepo.

📁 react-10k

Path: ../build-tools-performance/cases/react-10k/dist/rsdoctor-data.json

📌 Baseline Commit: 19c6cd719b | PR: #12432

Metric	Current	Baseline	Change
📊 Total Size	5.7 MB	5.7 MB	0 B (0.0%)
📄 JavaScript	5.7 MB	5.7 MB	0 B (0.0%)
🎨 CSS	21.0 B	21.0 B	0 B (0.0%)
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: react-10k Bundle Diff

📁 react-1k

Path: ../build-tools-performance/cases/react-1k/dist/rsdoctor-data.json

📌 Baseline Commit: 19c6cd719b | PR: #12432

Metric	Current	Baseline	Change
📊 Total Size	823.6 KB	823.6 KB	0 B (0.0%)
📄 JavaScript	823.6 KB	823.6 KB	0 B (0.0%)
🎨 CSS	0 B	0 B	N/A
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: react-1k Bundle Diff

📁 react-5k

Path: ../build-tools-performance/cases/react-5k/dist/rsdoctor-data.json

📌 Baseline Commit: 19c6cd719b | PR: #12432

Metric	Current	Baseline	Change
📊 Total Size	2.7 MB	2.7 MB	0 B (0.0%)
📄 JavaScript	2.7 MB	2.7 MB	0 B (0.0%)
🎨 CSS	21.0 B	21.0 B	0 B (0.0%)
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: react-5k Bundle Diff

📁 rome

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

📌 Baseline Commit: 19c6cd719b | PR: #12432

Metric	Current	Baseline	Change
📊 Total Size	984.3 KB	984.3 KB	0 B (0.0%)
📄 JavaScript	984.3 KB	984.3 KB	0 B (0.0%)
🎨 CSS	0 B	0 B	N/A
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: rome Bundle Diff

📁 ui-components

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

📌 Baseline Commit: 19c6cd719b | PR: #12432

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

📦 Download Diff Report: ui-components Bundle Diff

Generated by Rsdoctor GitHub Action

[github-actions]

📦 Binary Size-limit

Comparing 3ae4c52 to chore: bump swc_experimental to fix parsing utf8 in template (#12431) by CPunisher

🙈 Size remains the same at 48.20MB

[codspeed-hq]

CodSpeed Performance Report

Merging #12435 will not alter performance

_{Comparing warning_strip_1212 (3ae4c52) with main (6f3f4de)¹}

Summary

✅ 17 untouched

Footnotes

1. No successful run was found on main (19c6cd7) during the generation of this report, so 6f3f4de was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩