Addon Vitest: Fix postinstall file types

[shilman]

Closes N/A

NOTE: the problem below is actually fixed by #28980. But this PR is still valid. CJS should not require ESM.

$ npx storybook@next add @storybook/experimental-addon-vitest

An error occurred while installing dependencies:
Cet.default is not a function
Error running postinstall script for @storybook/experimental-addon-vitest
HandledError: TypeError: Cet.default is not a function
    at AJ.addDependencies (/Users/shilman/projects/testing/realworld/web/node_modules/@storybook/core/dist/common/index.cjs:151965:72)
    at async postInstall (/Users/shilman/projects/testing/realworld/web/node_modules/@storybook/experimental-addon-vitest/dist/postinstall.cjs:44:212)
    at async postinstallAddon (/Users/shilman/.npm/_npx/7478adc60dc49e45/node_modules/@storybook/cli/dist/bin/index.cjs:51:984)
    at async add (/Users/shilman/.npm/_npx/7478adc60dc49e45/node_modules/@storybook/cli/dist/bin/index.cjs:55:993) {
  handled: true,

What I did

Fix CJS requiring ESM. Not sure whether this will solve the problem.

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

Postinstall the canary (?)

🦋 Canary release

This pull request has been released as version 0.0.0-pr-28978-sha-d1099143. Try it out in a new sandbox by running npx storybook@0.0.0-pr-28978-sha-d1099143 sandbox or in an existing project with npx storybook@0.0.0-pr-28978-sha-d1099143 upgrade.

More information

Published version	0.0.0-pr-28978-sha-d1099143
Triggered by	@shilman
Repository	storybookjs/storybook
Branch	shilman/fix-vitest-postinstall
Commit	d1099143
Datetime	Tue Aug 27 12:26:58 UTC 2024 (1724761618)
Workflow run	10578071334

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=28978

name	before	after	diff	z	%
createSize	0 B	0 B	0 B	-	-
generateSize	76.4 MB	76.4 MB	0 B	0.99	0%
initSize	169 MB	169 MB	0 B	1.02	0%
diffSize	92.8 MB	92.8 MB	0 B	1.07	0%
buildSize	7.46 MB	7.46 MB	0 B	1.45	0%
buildSbAddonsSize	1.62 MB	1.62 MB	0 B	1.14	0%
buildSbCommonSize	195 kB	195 kB	0 B	-	0%
buildSbManagerSize	2.3 MB	2.3 MB	0 B	-	0%
buildSbPreviewSize	352 kB	352 kB	0 B	1.36	0%
buildStaticSize	0 B	0 B	0 B	-	-
buildPrebuildSize	4.46 MB	4.46 MB	0 B	1.23	0%
buildPreviewSize	3 MB	3 MB	0 B	1.53	0%
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	-	-

name	before	after	diff	z	%
createTime	6.7s	16.9s	10.1s	0	60.2%
generateTime	19s	21.4s	2.4s	0.13	11.5%
initTime	15.7s	20.4s	4.7s	2.39	🔺23%
buildTime	11.9s	14s	2.1s	1.13	15.3%
testBuildTime	0ms	0ms	0ms	-	-
devPreviewResponsive	7.8s	7.2s	-690ms	-0.37	-9.6%
devManagerResponsive	4.7s	4.7s	67ms	-0.25	1.4%
devManagerHeaderVisible	735ms	841ms	106ms	0.39	12.6%
devManagerIndexVisible	767ms	849ms	82ms	-0.01	9.7%
devStoryVisibleUncached	1.3s	1.3s	24ms	0.15	1.7%
devStoryVisible	766ms	881ms	115ms	0.35	13.1%
devAutodocsVisible	732ms	770ms	38ms	0.33	4.9%
devMDXVisible	630ms	718ms	88ms	-0.03	12.3%
buildManagerHeaderVisible	678ms	725ms	47ms	-0.36	6.5%
buildManagerIndexVisible	683ms	726ms	43ms	-0.46	5.9%
buildStoryVisible	717ms	764ms	47ms	-0.55	6.2%
buildAutodocsVisible	690ms	665ms	-25ms	-0.53	-3.8%
buildMDXVisible	631ms	668ms	37ms	-0.28	5.5%

Greptile Summary

This pull request addresses an issue with the postinstall script for the @storybook/experimental-addon-vitest addon by updating file extensions to resolve CommonJS importing ESM problems.

• Updated code/addons/vitest/postinstall.cjs to require 'dist/postinstall.cjs' instead of '.js'
• Modified code/addons/vitest/preset.cjs to directly export contents from 'dist/preset.cjs'
• These changes aim to fix the "Cet.default is not a function" error during addon installation
• The modifications are minimal but crucial for resolving the reported installation error

[greptile-apps]

LGTM

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