Scripts: regression - webpack config cannot be extended anymore #44309
Description
Description
Until this commit It was possible to extend the wordpress-scripts webpack config.
This change breaks it. I was using it to compile es6 files using WordPress libraries (eg. @wordpress/api-fetch). This way I am able to control the input and output directories and filenames. It will then give me a bundle and a PHP files with scripts dependencies.
Here is a simplified example that works with version 24.0.0 and not 24.1.0: https://github.com/loxK/wordpress-scripts-test
Step-by-step reproduction instructions
- create a webpack config
- extend it and export
- use it
- see the error:
» npm run build
> build
> webpack
[webpack-cli] Failed to load '/home/www/test/webpack.config.js' config
[webpack-cli] TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
at new NodeError (node:internal/errors:387:5)
at validateString (node:internal/validators:121:11)
at Object.join (node:path:1172:7)
at fromProjectRoot (/home/www/test/node_modules/@wordpress/scripts/utils/file.js:13:7)
at hasProjectFile (/home/www/test/node_modules/@wordpress/scripts/utils/file.js:16:14)
at getRenderPropPaths (/home/www/test/node_modules/@wordpress/scripts/utils/config.js:312:9)
at Object.<anonymous> (/home/www/test/node_modules/@wordpress/scripts/config/webpack.config.js:41:21)
at Module._compile (node:internal/modules/cjs/loader:1126:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1180:10)
at Module.load (node:internal/modules/cjs/loader:1004:32) {
code: 'ERR_INVALID_ARG_TYPE'
}
Screenshots, screen recording, code snippet
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Environment info
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Please confirm that you have searched existing issues in the repo.
Yes
Please confirm that you have tested with all plugins deactivated except Gutenberg.
Yes