Gutenberg Plugin: npm run start | buildcommand does not generate PHP files related to blocks on Windows OS

[t-hamano]

Description

Discovered this while testing #65064

When I run the npm run start or npm run build command, PHP files for server-side rendering of blocks are created in the build/block-library/blocks/ directory.

This works correctly on a Linux OS, but if I run this command on a Windows host OS, these PHP files are not generated.

Build on WSL2 (Ubuntu)	Build on Windows Host OS

This makes it difficult to build a Gutenberg project on a Windows host OS and test dynamic blocks on the frontend.

I took a difference between the logs when running npm run build on Ubuntu OS and Windows host OS, and it certainly looks like the PHP files are not being built:

After investigating the issue with git bisect, I found that this problem occurred in #63311.

When building a block using the latest @wordpress/scripts package, the PHP files defined in the render field and variations field are copied correctly.

Therefore, the changes made in this file, which is a custom setting for the Gutenberg project, may be the cause.

Step-by-step reproduction instructions

• Run npm run start or npm run build on the Windows host OS.
• Check the build/block-library/blocks/ directory.

Screenshots, screen recording, code snippet

No response

Environment info

No response

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