Build: Exclude non-minified VIPS files from grunt module copy

[adamsilverstein]

Summary

The gutenberg-modules grunt copy task in Gruntfile.js copies all script module files from the Gutenberg build except .map files. However, it does not exclude non-minified VIPS files, which are ~16MB of base64-encoded inlined WASM data. The non-minified worker.js is nearly identical in size to worker.min.js (minification has negligible effect on base64-encoded binary data) and provides no debugging value.

The existing tools/gutenberg/copy.js already has this exclusion (lines 213-220), but the Gruntfile's copy:gutenberg-modules task — which performs the actual module copy during grunt build:gutenberg — was missing the equivalent filter. This results in both worker.js (~16MB) and worker.min.js (~16MB) being included in the build output unnecessarily.

Steps to Reproduce

1. Run npx grunt build:gutenberg
2. Check build/wp-includes/js/dist/script-modules/vips/
3. Observe both worker.js and worker.min.js are present, nearly identical in size (~16MB each)

Expected Behavior

Only worker.min.js should be present in the build output, since the non-minified version provides no additional value for WASM-inlined content.

Proposed Change

Add a glob exclusion !vips/!(*.min).js to the gutenberg-modules copy task's src array in Gruntfile.js, matching the filter already in tools/gutenberg/copy.js.

PR: ​https://github.com/WordPress/wordpress-develop/pull/11281
Companion Gutenberg PR: ​https://github.com/WordPress/gutenberg/pull/76615

## Summary

Adds exclusion for non-minified VIPS files in the gutenberg-modules grunt copy task.

### Why

The VIPS worker files are ~16 MB of inlined WASM data where minification has negligible effect — worker.js and worker.min.js are nearly identical in size. This filter was already present in tools/gutenberg/copy.js (lines 213-220) but was missing from the Gruntfile grunt copy task that performs the actual module copy during grunt build:gutenberg.

### Size impact

	Before	After	Saved
wp-includes/js/dist/script-modules/vips/	~32 MB (worker.js + worker.min.js)	~16 MB (worker.min.js only)	~16 MB

### Related PRs for further size reduction (in Gutenberg)

• ​https://github.com/WordPress/gutenberg/pull/76615 — Skip non-minified vips worker build (saves ~32 MB from Gutenberg build output)
• ​https://github.com/WordPress/gutenberg/pull/76639 — Remove unused JXL WASM module (saves 3.1 MB from worker.min.js, 16.1 → 13.1 MB)

## Test plan

• [ ] Run npx grunt build:gutenberg — verify build/wp-includes/js/dist/script-modules/vips/ contains worker.min.js but NOT worker.js
• [ ] Run PHP tests: vendor/bin/phpunit tests/phpunit/tests/script-modules/wpScriptModules.php

Thanks @adamsilverstein!

One note, these files will not explicitly be removed from the build server until Core-64716 is addressed. The files are not cleaned up on the build server before rerunning npm run build with the changed source files, so the files remain under version control.

I am hoping to refresh #11036 shortly to have it in ahead of RC1.

[adamsilverstein]

In 62055:

Build: Exclude non-minified VIPS files from grunt module copy.

Add an exclusion for non-minified VIPS files to match the existing filter in tools/gutenberg/copy.js. This prevents ~16 MB worker.js from being copied alongside the nearly identically-sized worker.min.js.

Props adamsilverstein, zieladam, desrosj.
Fixes #64884.