Create mount point directories before mounting in php-cli-worker

The php.mount() call requires the mount point directory to already exist
in the PHP VFS. In the spawned PHP CLI workers, we need to create these
directories (/tmp, /wordpress, /home) before mounting native directories
to them.

This was already done in worker-thread-v2.ts but the shared mountResources()
function in mounts.ts didn't create directories, causing spawned PHP workers
to fail when trying to mount native directories in CI (Ubuntu).

Author: adamziel

packages/playground/cli/src/mounts.ts

@@ -76,6 +76,11 @@ export function parseMountDirArguments(mounts: string[]): Mount[] {
 
 export async function mountResources(php: PHP, mounts: Mount[]) {
 	for (const mount of mounts) {
+		// Create the mount point directory if it doesn't exist.
+		// This is necessary because php.mount() requires the directory to exist.
+		if (!php.isDir(mount.vfsPath)) {
+			php.mkdir(mount.vfsPath);
+		}
 		await php.mount(
 			mount.vfsPath,
 			createNodeFsMountHandler(mount.hostPath)