fix(file-size): use config hash for snapshot filename to avoid collisions

[chenjiahan]

Summary

When multiple Rsbuild config files are used, the file size snapshots could collide. This change adds a hash of the config file path to the snapshot filename to ensure uniqueness.

Related Links

• feat: support displaying the total size diff #6706 (comment)

Checklist

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

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.
To continue using code reviews, you can upgrade your account or add credits to your account and enable them for code reviews in your settings.

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	e4013da
🔍 Latest deploy log	https://app.netlify.com/projects/rsbuild/deploys/69323acb61ba970008302e67
😎 Deploy Preview	https://deploy-preview-6710--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 72 (🟢 up 2 from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 100 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[Copilot]

Pull request overview

This PR fixes a collision issue that occurs when multiple Rsbuild config files are used in the same project. By adding a hash of the config file path to the snapshot filename, each configuration now has its own unique snapshot file, preventing conflicts.

• Added hash-based snapshot filenames to avoid collisions when using multiple Rsbuild config files
• Updated documentation to reflect the new snapshot filename format (file-sizes-[hash].json)
• Refactored snapshot path handling to be more flexible and maintainable

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/core/src/plugins/fileSize.ts	Implements hash-based snapshot filenames by importing the hash helper, updating getSnapshotPath to accept a hash parameter, refactoring loadPrevSnapshots and saveSnapshots to use the snapshot path directly, and computing the hash from the config file path when diff mode is enabled
website/docs/en/config/performance/print-file-size.mdx	Updates documentation to reflect the new snapshot filename format with hash suffix

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.