Build/Test Tools: Show Gutenberg assets hash in version footer

src/wp-admin/includes/update.php

@@ -267,12 +267,28 @@ function core_update_footer( $msg = '' ) {
 	$is_development_version = preg_match( '/alpha|beta|RC/', wp_get_wp_version() );
 
 	if ( $is_development_version ) {
-		return sprintf(
+		$footer = sprintf(
 			/* translators: 1: WordPress version number, 2: URL to WordPress Updates screen. */
 			__( 'You are using a development version (%1$s). Cool! Please <a href="%2$s">stay updated</a>.' ),
 			get_bloginfo( 'version', 'display' ),
 			network_admin_url( 'update-core.php' )
 		);
+
+		global $wp_gutenberg_hash;
+
+		if ( $wp_gutenberg_hash
+			&& in_array( wp_get_environment_type(), array( 'local', 'development' ), true )
+		) {
+			$short_hash = substr( $wp_gutenberg_hash, 0, 7 );
+			$footer    .= ' | ' . sprintf(
+				/* translators: 1: Gutenberg commit URL, 2: Short commit hash. */
+				__( 'Gutenberg <a href="%1$s">%2$s</a>' ),
+				esc_url( 'https://github.com/WordPress/gutenberg/commit/' . $wp_gutenberg_hash ),
+				esc_html( $short_hash )
+			);
+		}
+
+		return $footer;
 	}
 
 	switch ( $cur->response ) {
@@ -391,7 +407,26 @@ function update_right_now_message() {
 	 */
 	$content = apply_filters( 'update_right_now_text', $content );
 
-	$msg .= sprintf( '<span id="wp-version">' . $content . '</span>', get_bloginfo( 'version', 'display' ), $theme_name );
+	global $wp_gutenberg_hash;
+
+	if ( $wp_gutenberg_hash
+		&& preg_match( '/alpha|beta|RC/', wp_get_wp_version() )
+		&& in_array( wp_get_environment_type(), array( 'local', 'development' ), true )
+	) {
+		$short_hash     = substr( $wp_gutenberg_hash, 0, 7 );
+		$version_string = sprintf(
+			/* translators: 1: WordPress version number, 2: URL to Gutenberg commit, 3: Short commit hash. */
+			__( '%1$s (built with <a href="%2$s">%3$s</a>)' ),
+			get_bloginfo( 'version', 'display' ),
+			esc_url( 'https://github.com/WordPress/gutenberg/commit/' . $wp_gutenberg_hash ),
+			esc_html( $short_hash )
+		);
+		$content = sprintf( $content, $version_string, $theme_name );
+	} else {
+		$content = sprintf( $content, get_bloginfo( 'version', 'display' ), $theme_name );
+	}
+
+	$msg .= '<span id="wp-version">' . $content . '</span>';
 
 	echo "<p id='wp-version-message'>$msg</p>";
 }

src/wp-includes/version.php

@@ -55,3 +55,14 @@
  * @global string $required_mysql_version
  */
 $required_mysql_version = '5.5.5';
+
+/**
+ * Holds the Gutenberg commit hash used to build the included assets.
+ *
+ * This value is set during the build process and corresponds to the
+ * Gutenberg repository commit from which the bundled assets were generated.
+ *
+ * @since 7.1.0
+ * @global string $wp_gutenberg_hash
+ */
+$wp_gutenberg_hash = 'a2a354cf35e5b69c3330d6c1cfd42d8dc2efb9fd';

tools/gutenberg/copy.js

@@ -519,6 +519,49 @@ function generateBlocksJson() {
 	);
 }
 
+/**
+ * Update the $wp_gutenberg_hash value in version.php.
+ * Reads the hash from gutenberg/.gutenberg-hash (the actual built version)
+ * and writes it into the version file so it is available at runtime.
+ */
+function updateVersionFile() {
+	const hashFilePath = path.join( gutenbergDir, '.gutenberg-hash' );
+	const versionFile = path.join( rootDir, buildTarget, 'wp-includes/version.php' );
+
+	if ( ! fs.existsSync( hashFilePath ) ) {
+		console.error( '   ❌ gutenberg/.gutenberg-hash not found' );
+		process.exit( 1 );
+	}
+
+	const installedHash = fs.readFileSync( hashFilePath, 'utf8' ).trim();
+
+	if ( ! /^[0-9a-f]{40}$/.test( installedHash ) ) {
+		console.error( '   ❌ Invalid SHA format in .gutenberg-hash' );
+		process.exit( 1 );
+	}
+
+	if ( ! fs.existsSync( versionFile ) ) {
+		console.log( '   ⚠️  version.php not found, skipping hash update' );
+		return;
+	}
+
+	const content = fs.readFileSync( versionFile, 'utf8' );
+	const pattern = /\$wp_gutenberg_hash = '[^']*';/;
+
+	if ( ! pattern.test( content ) ) {
+		console.error( '   ❌ $wp_gutenberg_hash pattern not found in version.php' );
+		process.exit( 1 );
+	}
+
+	const updated = content.replace(
+		pattern,
+		`$wp_gutenberg_hash = '${ installedHash }';`
+	);
+
+	fs.writeFileSync( versionFile, updated );
+	console.log( `   ✅ Set $wp_gutenberg_hash to ${ installedHash.substring( 0, 7 ) }` );
+}
+
 /**
  * Main execution function.
  */
@@ -637,6 +680,10 @@ async function main() {
 	console.log( '\n📦 Generating blocks-json.php...' );
 	generateBlocksJson();
 
+	// 7. Update $wp_gutenberg_hash in version.php.
+	console.log( '\n📦 Updating Gutenberg hash in version.php...' );
+	updateVersionFile();
+
 	console.log( '\n✅ Copy complete!' );
 }