Troubleshooting the ckeditor-duplicated-modules error when trying to install a local npm package that should utilize the node_modules of the main project through yarn

As I work on my MainProject, I'm attempting to set up a local version of the ckeditor-5 plugin PeteCkPlugin that was generated using the ckeditor5 package generator.

I experimented with using yarn link within the local directory of PeteCkPlugin, followed by 

yarn link @PeteSpace/PeteCkPlugin
in the root directory of MainProject. However, this resulted in a 
Usage Error: Invalid destination '@PeteSpace/PeteCkPlugin'; Can't link the project to itself
message.

Another approach I tried was utilizing the yarn package.json resolutions field:

{
  ...,
  "resolutions": { 
    "@PeteSpace/PeteCkPlugin": "link:/path/to/project/PeteSpace/PeteCkPlugin" 
  },
  ...
}

This method successfully installed the package. However, MainProject encountered a failure with an 

"Uncaught CKEditorError: ckeditor-duplicated-modules. Read more: https://ckeditor.com/docs/ckeditor5/latest/support/error-codes.html#error-ckeditor-duplicated-modules"
error. This issue seemed to stem from the local PeteCkPlugin package utilizing its own 
PeteCkPackage/node_modules/ckeditor package
instead of the shared 
MainProject/node_modules/ckeditor package
.

I experimented with replacing link: with portal: within the resolutions value as well...

Since the package is private and I am not yet part of the correct npm organization, I am unable to publish it. Any suggestions or insights on symlink behavior and the interactions between yarn and npm would be greatly appreciated as I navigate this process.

javascriptnpmhadoop-yarnckeditor5ckeditor-plugin

Answer №1

In my experience, I have encountered similar issues with the yarn link command, leading me to switch to yalc instead. Using yalc has proven to be consistently reliable for me.

Here is a simple step-by-step process:

  1. Install Yalc globally
volta install yalc # or `npm i -g yalc` if you don't use volta
  1. Publish your dependency
yalc publish # run from dependency root after build process
  1. Link the dependency
yalc link # run from the root of your main project

You also have the option to subscribe and autopublish changes from your dependency.

For more detailed information, please refer to the official readme.

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