Description

Additional context in #53565. While trying to manually publish WordPress packages to npm using the script executed from the local machine, I run into an error where npm ci failed because npm version set in trunk to be able to run the script doesn't meet the requirements for the branch where source code lives. In effect, the script bails out, and publishing isn't possible.

In effect, any backport to WordPress 6.3 and lower will fail from GitHub UI as explained:

https://github.com/WordPress/gutenberg/blob/trunk/docs/contributors/code/release.md#wordpress-releases

Everything should work correctly for WordPress 6.4, as the script and the future branch will use the same Node.js and npm versions.

Step-by-step reproduction instructions

I executed from trunk that is now on Node 16 and npm 8:

./bin/plugin/cli.js npm-latest --semver minor

It pulled changes from release/16.4 that was still on Node 14 and npm 6, so npm ci throws an error that it can finish when using npm 8.

The same issue will happen when trying to backport changes to WordPress core when using any of wp/X.Y branches that enforce usage of npm 6.

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