Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.

Bug report

What is the current behavior? The npx size-limit command fails with the following error

➜  ts-react-components-lib git:(hhimanshu/update-deps) ✗ npx size-limit
✖ Adding to empty webpack project
 ERROR  WebpackOptionsValidationError: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
 - configuration.entry['index'] should be an non-empty array.
   -> A non-empty array of non-empty strings
    at webpack (/Users/hhimanshu/code/prsnl/ts/ts-react-components-lib/node_modules/webpack/lib/webpack.js:31:9)
    at /Users/hhimanshu/code/prsnl/ts/ts-react-components-lib/node_modules/@size-limit/webpack/run-webpack.js:5:20
    at new Promise (<anonymous>)
    at runWebpack (/Users/hhimanshu/code/prsnl/ts/ts-react-components-lib/node_modules/@size-limit/webpack/run-webpack.js:4:10)
    at Object.step40 (/Users/hhimanshu/code/prsnl/ts/ts-react-components-lib/node_modules/@size-limit/webpack/index.js:88:38)
    at /Users/hhimanshu/code/prsnl/ts/ts-react-components-lib/node_modules/size-limit/calc.js:17:47
    at Array.map (<anonymous>)
    at step (/Users/hhimanshu/code/prsnl/ts/ts-react-components-lib/node_modules/size-limit/calc.js:16:29)
    at calc (/Users/hhimanshu/code/prsnl/ts/ts-react-components-lib/node_modules/size-limit/calc.js:44:42)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)

If the current behavior is a bug, please provide the steps to reproduce.

• Please checkout hhimanshu/update-deps branch from https://github.com/hhimanshu/ts-react-components-lib
• Run yarn install
• Run yarn size

What is the expected behavior? The command should have ran successfully

Other relevant information: The package.json is available at https://github.com/hhimanshu/ts-react-components-lib/blob/hhimanshu/update-deps/package.json

webpack version:
Node.js version

➜  ts-react-components-lib git:(hhimanshu/update-deps) ✗ node -v
v14.17.0
➜  ts-react-components-lib git:(hhimanshu/update-deps) npm -v
7.17.0
➜  ts-react-components-lib git:(hhimanshu/update-deps)

Operating System: Mac Additional tools:

[tejparekh]

@hhimanshu Thanks for your response. I was able to solve this. Looks like the source of issue was little different than yours. That may because I am using a UI framework. Here are the details.

https://github.com/ant-design/ant-design-pro/issues/8828#issuecomment-890671623

[hhimanshu]

Hello @tejparekh , in my case, it was because my expected file names in package.json did not match the ones produced by yarn build. The related bug is https://github.com/ai/size-limit/issues/241 Check id this is the same thing in your case. Hope that helps