[Bug]: sb babelrc produces empty config

[shilman]

Describe the bug

Users of SB6 migrating to SB7 who don't have a babelrc should be able to run:

npx sb babelrc

This should create a .babelrc.json that provides a legacy v6 babel configuration. Instead it prodcues:

{
  "sourceType": "unambiguous",
  "presets": [],
  "plugins": []
}

To Reproduce

No response

System

No response

Additional context

No response

[ndelangen]

Code is generated here:

storybook/code/lib/cli/src/babel-config.ts

Lines 13 to 21 in 5a557d3

	const contents = JSON.stringify(
	{
	sourceType: 'unambiguous',
	presets: [],
	plugins: [],
	},
	null,
	2
	);

[ndelangen]

I can't generate it with comments because of the .json extension. And even if that could support comments, I'd need to switch to some other form of code-generation; because JSON.stringify can't do it.

[shilman]

Yo-ho-ho!! I just released https://github.com/storybookjs/storybook/releases/tag/v7.0.0-beta.9 containing PR #20234 that references this issue. Upgrade today to the @next NPM tag to try it out!

npx sb upgrade --prerelease

Closing this issue. Please re-open if you think there's still more to do.