Addon Vitest: Fix watch mode for new files

[valentinpalkovic]

Closes #31100

What I did

I have fixed watch mode for newly added story files in @storybook/addon-vitest

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This pull request has been released as version 0.0.0-pr-31156-sha-db97728a. Try it out in a new sandbox by running npx [email protected] sandbox or in an existing project with npx [email protected] upgrade.

More information

Published version	0.0.0-pr-31156-sha-db97728a
Triggered by	@valentinpalkovic
Repository	storybookjs/storybook
Branch	valentin/fix-watch-mode-for-new-files
Commit	db97728a
Datetime	Tue May 13 11:04:25 UTC 2025 (1747134265)
Workflow run	14994980268

To request a new release of this pull request, mention the @storybookjs/core team.

core team members can create a new canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=31156

Greptile Summary

This PR enhances the Vitest addon's file watching capabilities, particularly focusing on detecting and testing newly added story files by improving event handling and pattern matching.

• Modified code/addons/vitest/src/node/vitest-manager.ts to properly handle 'add' vs 'change' events for test files
• Replaced tinyglobby with micromatch in code/addons/vitest/src/vitest-plugin/index.ts for more reliable file pattern matching
• Added includeStories to InternalOptions in code/addons/vitest/src/vitest-plugin/types.ts for better story inclusion control
• Exported DEFAULT_FILES_PATTERN from code/core/src/common/utils/normalize-stories.ts for consistent file matching
• Added environment variable support in scripts/utils/cli-step.ts for improved CLI configuration

[greptile-apps]

_{5 file(s) reviewed, 3 comment(s)
Edit PR Review Bot Settings | Greptile}

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 7904587.

Command	Status	Duration	Result
nx run-many -t build --parallel=3	✅ Succeeded	1m 23s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-05-14 14:15:51 UTC

[storybook-pr-benchmarking]

Package Benchmarks

^{Commit: 7904587, ran on 14 May 2025 at 14:17:38 UTC}

The following packages have significant changes to their size or dependencies:

@storybook/addon-vitest

	Before	After	Difference
Dependency count	6	6	0
Self size	616 KB	627 KB	🚨 +11 KB 🚨
Dependency size	1.49 MB	1.49 MB	0 B
Bundle Size Analyzer	Link	Link

[greptile-apps]

_{8 file(s) reviewed, 3 comment(s)
Edit PR Review Bot Settings | Greptile}