What does the warning WARN unable to find package.json for rollup means?

[rhuanbarreto]

Describe the bug
I receive the warning in the console every time i start a storybook for a library I'm creating:

WARN unable to find package.json for rollup

My dependencies in package.json:

"devDependencies": {
    "@babel/core": "^7.12.13",
    "@babel/preset-react": "^7.12.13",
    "@rollup/plugin-babel": "^5.2.3",
    "@rollup/plugin-json": "^4.1.0",
    "@storybook/addon-actions": "^6.1.17",
    "@storybook/addon-essentials": "^6.1.17",
    "@storybook/addon-links": "^6.1.17",
    "@storybook/react": "^6.1.17",
    "@typescript-eslint/eslint-plugin": "^4.15.1",
    "@typescript-eslint/parser": "^4.15.1",
    "babel-eslint": "^10.1.0",
    "babel-loader": "^8.2.2",
    "eslint": "^7.20.0",
    "eslint-config-react-app": "^6.0.0",
    "eslint-plugin-flowtype": "^5.2.0",
    "eslint-plugin-import": "^2.22.1",
    "eslint-plugin-jsx-a11y": "^6.4.1",
    "eslint-plugin-react": "^7.22.0",
    "eslint-plugin-react-hooks": "^4.2.0",
    "rollup": "^2.38.5",
    "rollup-plugin-commonjs": "^10.1.0",
    "rollup-plugin-delete": "^2.0.0",
    "rollup-plugin-generate-package-json": "^3.2.0",
    "rollup-plugin-node-resolve": "^5.2.0",
    "rollup-plugin-peer-deps-external": "^2.2.3"
  },
  "peerDependencies": {
    "lodash.filter": "^4.6.0",
    "lodash.orderby": "^4.6.0",
    "lodash.pickby": "^4.6.0",
    "prop-types": "^15.7.2",
    "react": "^17.0.1",
    "react-dom": "^17.0.1"
  }

[ckaethler]

^ Having the same error and would love some suggested solutions

[shilman]

Do you have a repro repo you can share?

[tihuan]

I have the same issue!

Please try: https://github.com/tihuan/components and run yarn && yarn storybook 🙏

Thank you!

[sagic]

same here 🙋🏻‍♂️

[shilman]

This warning is being printed here: https://github.com/storybookjs/storybook/blob/next/lib/core-server/src/manager/manager-config.ts#L37

Storybook is going through your project's dependencies and trying to read the package.json to extract the storybook metadata from it in the case of component libraries with published storybook's. I don't know why this code can't find rollup's package.json, but the warning can safely be ignored because rollup is not a component library and does not have said metadata.

[tihuan]

Ahh perfect! Thanks so much, @shilman 🤩 Can confirm that the components work as intended in the storybook even with the warning 👍 Have a wonderful day!

[zanona]

related #13099

[lotyp]

Problem still exists:

WARN unable to find package.json for @wayofdev/ui

when I'm running build in my monorepo:

turbo run build --filter=storybook --color --parallel

## or
pnpm --filter=storybook build:storybook

Repo is located here:

https://github.com/wayofdev/next-starter-tpl

Project structure:

.
├── apps
│   ├── docs
│   │   └── package.json
│   ├── storybook
│   │   └── package.json
│   └── web
│       └── package.json
├── packages
│   ├── common-i18n
│   │   └── package.json
│   ├── facebook-pixel
│   │   └── package.json
│   ├── google-tag-manager
│   │   └── package.json
│   └── ui
│       └── package.json
└── package.json

[rexkenley]

@shilman, maybe related but I am getting

Executing task: npx nx run catalog:storybook 
> nx run catalog:storybook
info => Starting manager..
WARN unable to find package.json for @storybook/react-vite
WARN unable to find package.json for vite

And I don't use vite. The only instance of @storybook/react-vite is in the root package.json