Build: Fix copyBlockAssets's handling of folders.

When copying block-type assets from Gutenberg to Core, use Node's `fs.cp`
instead of `fs.copy`. The former has much better semantics for wholesale
copies.

Fixes build failures arising from the introduction of subdirectories in the
source directories of certain core block types.

Reviewed by youknowriad.

Fixes #64559.



git-svn-id: https://develop.svn.wordpress.org/trunk@61567 602fd350-edb4-49c9-b593-d223f7449a82

Author: mcsf

tools/gutenberg/copy-gutenberg-build.js

@@ -223,16 +223,15 @@ function copyBlockAssets( config ) {
 			// 1. Copy scripts/JSON (everything except PHP)
 			const blockScriptsSrc = path.join( scriptsSrc, blockName );
 			if ( fs.existsSync( blockScriptsSrc ) ) {
-				const files = fs.readdirSync( blockScriptsSrc );
-				for ( const file of files ) {
-					if ( file.endsWith( '.php' ) ) {
-						continue; // Skip PHP, copied from packages
+				fs.cpSync(
+					blockScriptsSrc,
+					blockDest,
+					{
+						recursive: true,
+						// Skip PHP, copied from packages
+						filter: f => ! f.endsWith( '.php' ),
 					}
-					fs.copyFileSync(
-						path.join( blockScriptsSrc, file ),
-						path.join( blockDest, file )
-					);
-				}
+				);
 			}
 
 			// 2. Copy styles (if they exist in per-block directory)