Can't use storyStoreV7 with Flow

[lyleunderwood]

Describe the bug

It seems like storyStoreV7 depends on this babelParse utility that has a hardcoded configuration:

storybook/lib/csf-tools/src/babelParse.ts

Lines 6 to 12 in cf4b3c7

	// FIXME: we should get this from the project config somehow?
	plugins: [
	'jsx',
	'typescript',
	['decorators', { decoratorsBeforeExport: true }],
	'classProperties',
	],

Because of this, Flow-specific syntax cannot be supported without getting a parser error from babel. I've confirmed that if I replace typescript with flow in the above code, I no longer get the parser error.

To Reproduce

Run storybook with any story files using flow-specific syntax.

System

Environment Info:

  System:
    OS: Linux 5.4 Ubuntu 20.04.3 LTS (Focal Fossa)
    CPU: (4) x64 Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz
  Binaries:
    Node: 14.18.1 - ~/.nvm/versions/node/v14.18.1/bin/node
    Yarn: 1.22.15 - ~/dev/elastic/scramble-com/node_modules/.bin/yarn
    npm: 6.14.15 - ~/.nvm/versions/node/v14.18.1/bin/npm
  Browsers:
    Chrome: 68.0.3440.75
    Firefox: 95.0
  npmPackages:
    @storybook/addon-actions: 6.4.9 => 6.4.9 
    @storybook/addon-essentials: 6.4.9 => 6.4.9 
    @storybook/addon-knobs: 6.3.1 => 6.3.1 
    @storybook/addon-options: ^5.3.21 => 5.3.21 
    @storybook/addons: 6.4.9 => 6.4.9 
    @storybook/builder-webpack5: 6.4.9 => 6.4.9 
    @storybook/manager-webpack5: 6.4.9 => 6.4.9 
    @storybook/react: 6.4.9 => 6.4.9 
    @storybook/theming: 6.4.9 => 6.4.9 

Additional context
N/A

[stale]

Hi everyone! Seems like there hasn't been much going on in this issue lately. If there are still questions, comments, or bugs, please feel free to continue the discussion. Unfortunately, we don't have time to get to every issue. We are always open to contributions so please send us a pull request if you would like to help. Inactive issues will be closed after 30 days. Thanks!

[sysofwan]

Not stale. storyStoreV7 is not respecting babel config, and this is blocking us from migrating.

[valscion]

Looks like #21859 would also fix this issue.

[valscion]

@lyleunderwood can you check if v7.1.0-alpha.9 has fixed this issue? For reference:

• fix: allow Flow syntax in stories #21859
• [Bug]: Storybook 7 + Vite + Flow not working #21816 (comment)