Webpack: Fix sourceMap generation in csf-tools

[valentinpalkovic]

Closes #28576

What I did

I have added babel.generate enough information to produce a source map file to correctly define the sources property instead of setting it to [undefined]

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!

1. Run a sandbox for template, e.g. yarn task --task sandbox --start-from auto --template react-vite/default-ts
2. Use the @storybook/addon-storysource addon
3. Start Storybook. Storybook shouldn't fail to start

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/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-28585-sha-af48f0d6. Try it out in a new sandbox by running npx storybook@0.0.0-pr-28585-sha-af48f0d6 sandbox or in an existing project with npx storybook@0.0.0-pr-28585-sha-af48f0d6 upgrade.

More information

Published version	0.0.0-pr-28585-sha-af48f0d6
Triggered by	@valentinpalkovic
Repository	storybookjs/storybook
Branch	valentin/fix-source-maps-for-webpack
Commit	af48f0d6
Datetime	Fri Jul 12 21:37:13 UTC 2024 (1720820233)
Workflow run	9914441500

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=28585

name	before	after	diff	%
createTime	8.2s	7s	-1s -240ms	🔰-17.7%
generateTime	23.2s	22s	-1s -171ms	🔰-5.3%
initTime	22.9s	22.2s	-614ms	-2.8%
createSize	0 B	0 B	0 B	-
generateSize	76.5 MB	76.5 MB	0 B	0%
initSize	198 MB	198 MB	6.97 kB	0%
diffSize	122 MB	122 MB	6.97 kB	0%
buildTime	14.3s	13s	-1s -313ms	🔰-10%
buildSize	7.59 MB	7.59 MB	0 B	0%
buildSbAddonsSize	1.63 MB	1.63 MB	0 B	0%
buildSbCommonSize	195 kB	195 kB	0 B	0%
buildSbManagerSize	2.3 MB	2.3 MB	0 B	0%
buildSbPreviewSize	349 kB	349 kB	0 B	0%
buildStaticSize	0 B	0 B	0 B	-
buildPrebuildSize	4.47 MB	4.47 MB	0 B	0%
buildPreviewSize	3.12 MB	3.12 MB	0 B	0%
testBuildTime	0ms	0ms	0ms	-
testBuildSize	0 B	0 B	0 B	-
testBuildSbAddonsSize	0 B	0 B	0 B	-
testBuildSbCommonSize	0 B	0 B	0 B	-
testBuildSbManagerSize	0 B	0 B	0 B	-
testBuildSbPreviewSize	0 B	0 B	0 B	-
testBuildStaticSize	0 B	0 B	0 B	-
testBuildPrebuildSize	0 B	0 B	0 B	-
testBuildPreviewSize	0 B	0 B	0 B	-
devPreviewResponsive	10.4s	8.3s	-2s -83ms	🔰-24.8%
devManagerResponsive	6.4s	5.4s	-1s -32ms	🔰-19%
devManagerHeaderVisible	965ms	847ms	-118ms	🔰-13.9%
devManagerIndexVisible	998ms	850ms	-148ms	🔰-17.4%
devStoryVisibleUncached	2s	1.2s	-739ms	🔰-57.6%
devStoryVisible	1s	894ms	-125ms	🔰-14%
devAutodocsVisible	714ms	745ms	31ms	4.2%
devMDXVisible	876ms	772ms	-104ms	🔰-13.5%
buildManagerHeaderVisible	883ms	748ms	-135ms	🔰-18%
buildManagerIndexVisible	891ms	750ms	-141ms	🔰-18.8%
buildStoryVisible	944ms	799ms	-145ms	🔰-18.1%
buildAutodocsVisible	754ms	713ms	-41ms	🔰-5.8%
buildMDXVisible	714ms	725ms	11ms	1.5%

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[greptile-apps]

PR Summary

• Updated import statement for @babel/generator in /code/core/src/csf-tools/CsfFile.ts
• Modified formatCsf function to accept GeneratorOptions with inputSourceMap in /code/core/src/csf-tools/CsfFile.ts
• Added sourceFileName parameter to formatCsf function call in /code/lib/csf-plugin/src/webpack-loader.ts
• Improved source map generation for Webpack in csf-tools
• Addressed issue #28576

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