Override default umask in PHP

vendor/wp-now/src/wp-now.ts

@@ -8,7 +8,11 @@ import {
 	rotatePHPRuntime,
 	setPhpIniEntries,
 } from '@php-wasm/universal';
-import { wordPressRewriteRules, getFileNotFoundActionForWordPress } from '@wp-playground/wordpress';
+import {
+	wordPressRewriteRules,
+	getFileNotFoundActionForWordPress,
+	setupPlatformLevelMuPlugins,
+} from '@wp-playground/wordpress';
 import path from 'path';
 import { SQLITE_FILENAME } from './constants';
 import { rootCertificates } from 'tls';
@@ -109,6 +113,11 @@ export default async function startWPNow(
 		await activatePluginOrTheme( php, options );
 	}
 
+	// Setup internal plugins needed for Playground
+	await setupPlatformLevelMuPlugins( php );
+	// Add custom plugins needed for Studio sites
+	addDefaultUmaskPlugin( php, options.documentRoot );
+
 	rotatePHPRuntime( {
 		php,
 		cwd: requestHandler.documentRoot,
@@ -563,3 +572,15 @@ export async function moveDatabasesInSitu( projectPath: string ) {
 		fs.rmSync( wpContentPath, { recursive: true, force: true } );
 	}
 }
+
+function addDefaultUmaskPlugin( php: PHP, documentRoot: string ) {
+	php.writeFile(
+		'/internal/shared/mu-plugins/override-default-umask.php',
+		`<?php
+function set_default_umask()
+{
+    umask(0022);
+}
+add_action('init', 'set_default_umask', -9999);`
+	);
+}