Angular: Prevent directory import in Angular builders

[ghengeveld]

Closes #31975

What I did

This should resolve the ERR_UNSUPPORTED_DIR_IMPORT error.

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-32012-sha-80090a19. 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-32012-sha-80090a19
Triggered by	@ghengeveld
Repository	storybookjs/storybook
Branch	angular-builders-dir-import
Commit	80090a19
Datetime	Thu Jul 10 20:32:05 UTC 2025 (1752179525)
Workflow run	16205390773

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=32012

Greptile Summary

Updates Angular builders configuration to resolve the ERR_UNSUPPORTED_DIR_IMPORT error in Angular 19 by explicitly specifying index.js file paths instead of directory imports.

• Modified code/frameworks/angular/builders.json to use explicit file paths for build-storybook and start-storybook implementations
• Addresses import restrictions in ES modules that prevent direct directory imports
• Minimal, focused change that fixes issue [Bug]: ERR_UNSUPPORTED_DIR_IMPORT Angular 19 #31975 with Angular 19 compatibility

[greptile-apps]

LGTM

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 80090a1

Command	Status	Duration	Result
nx run-many -t build --parallel=3	✅ Succeeded	1m 15s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-07-10 20:55:47 UTC

[AngularIsAwfull]

This fixes my broken project which was failing with ERR_UNSUPPORTED_DIR_IMPORT