[php-wasm] Add support for rm command in sandboxed spawn handler

Author: Utsav-Ladani

packages/php-wasm/universal/src/lib/sandboxed-spawn-handler-factory.ts

@@ -81,7 +81,7 @@ export function sandboxedSpawnHandlerFactory(
 			return;
 		}
 
-		if (!['php', 'ls', 'pwd'].includes(binaryName ?? '')) {
+		if (!['php', 'ls', 'pwd', 'rm'].includes(binaryName ?? '')) {
 			// 127 is the exit code "for command not found".
 			processApi.exit(127);
 			return;
@@ -155,6 +155,20 @@ export function sandboxedSpawnHandlerFactory(
 					processApi.exit(0);
 					break;
 				}
+				case 'rm': {
+					const target = args[args.length - 1];
+					if (await php.isDir(target)) {
+						await php.rmdir(target, { recursive: true });
+					} else if (await php.isFile(target)) {
+						await php.unlink(target);
+					}
+					// Technical limitation of subprocesses – we need to
+					// wait before exiting to give consumer a chance to read
+					// the output.
+					await new Promise((resolve) => setTimeout(resolve, 10));
+					processApi.exit(0);
+					break;
+				}
 			}
 		} catch (e) {
 			// An exception here means the PHP runtime has crashed.