Build fails after upgrading to Angular 12

[kamulos]

I am using the license-checker-webpack-plugin in my Angular project. When upgrading from Angular 11 to Angular 12, my build did not work anymore. This has never before been an issue.

Reproduce

For simplicity I create a repo: https://github.com/kamulos/angular-license-checker-bug

There are two commits: the first one is an untouched new Angular project created with the version 12.1.4 of the Angular CLI. The second commit inserts the license-checker-webpack-plugin into the project. To provide a webpack config the custom-webpack package is used.

Error

The error that occurs is:

An unhandled exception occurred: Cannot find module '/path/to/angular-license-checker-bug/node_modules/@angular-devkit/package.json'

This is of course true: there is no package.json in this folder. But this is also nowhere specified as a dependency. One of the subprojects in this folder is probably meant to be checked.

[felixfontein]

This is the same issue as #43. I've just experienced this problem with a new Angular 13 project where I wanted to use license-checker-webpack-plugin.

[felixfontein]

... and probably the same as #25. Both #43 and this one should be fixed by #37

[felixfontein]

For a workaround see #37 (comment).