Playground CLI: Mount /wordpress, /internal, and /tmp dirs within real temporary dir

package.json

@@ -82,12 +82,14 @@
 		"ini": "4.1.2",
 		"octokit": "3.1.2",
 		"pako": "1.0.10",
+		"ps-man": "1.1.8",
 		"react": "18.3.1",
 		"react-dom": "18.3.1",
 		"react-hook-form": "7.53.0",
 		"react-redux": "8.1.3",
 		"react-transition-group": "4.4.5",
 		"sha.js": "2.4.11",
+		"tmp-promise": "3.0.3",
 		"wasm-feature-detect": "1.8.0",
 		"xml2js": "0.6.2",
 		"yargs": "17.7.2"

packages/php-wasm/compile/php/php_wasm.c

@@ -241,7 +241,7 @@ EM_JS(int, wasm_poll_socket, (php_socket_t socketd, int events, int timeout), {
 						if (stream.stream_ops?.poll) {
 							mask = stream.stream_ops.poll(stream, -1);
 						}
-						
+
 						mask &= events | POLLERR | POLLHUP;
 						if (mask) {
 							return mask;
@@ -418,7 +418,7 @@ EM_JS(__wasi_errno_t, js_fd_read, (__wasi_fd_t fd, const __wasi_iovec_t *iov, si
                 HEAPU32[pnum >> 2] = num;
                 return wakeUp(returnCode);
             }
-            
+
             // It's a blocking stream and we Blocking stream with no data available yet.
             // Let's poll up to a timeout.
             await new Promise(resolve => setTimeout(resolve, interval));
@@ -1026,8 +1026,8 @@ int main(int argc, char *argv[]);
 int run_cli()
 {
 	// See wasm_sapi_request_init() for details on why we need to redirect stdout and stderr.
-	stdout_replacement = redirect_stream_to_file(stdout, "/internal/stdout");
-	stderr_replacement = redirect_stream_to_file(stderr, "/internal/stderr");
+	stdout_replacement = redirect_stream_to_file(stdout, "/request/stdout");
+	stderr_replacement = redirect_stream_to_file(stderr, "/request/stderr");
 	if (stdout_replacement == -1 || stderr_replacement == -1)
 	{
 		return -1;
@@ -1337,7 +1337,7 @@ void wasm_set_request_port(int port)
  *
  *   stream: The stream to redirect, e.g. stdout or stderr.
  *
- *   path: The path to the file to redirect to, e.g. "/internal/stdout".
+ *   path: The path to the file to redirect to, e.g. "/request/stdout".
  *
  *   returns: The exit code: 0 on success, -1 on failure.
  */
@@ -1559,11 +1559,11 @@ int wasm_sapi_request_init()
 	// Write to files instead of stdout and stderr because Emscripten truncates null
 	// bytes from stdout and stderr, and null bytes are a valid output when streaming
 	// binary data.
-	// We use our custom Emscripten-defined /internal/std* devices and handle the output in JavaScript.
+	// We use our custom Emscripten-defined /request/std* devices and handle the output in JavaScript.
 	// These /internal devices are not thread-safe and should always stay in per-process MEMFS space.
 	// Sharing them between PHP instances may cause intertwined output.
-	stdout_replacement = redirect_stream_to_file(stdout, "/internal/stdout");
-	stderr_replacement = redirect_stream_to_file(stderr, "/internal/stderr");
+	stdout_replacement = redirect_stream_to_file(stdout, "/request/stdout");
+	stderr_replacement = redirect_stream_to_file(stderr, "/request/stderr");
 	if (stdout_replacement == -1 || stderr_replacement == -1)
 	{
 		return -1;
@@ -1821,7 +1821,7 @@ FILE *headers_file;
  */
 static int wasm_sapi_send_headers(sapi_headers_struct *sapi_headers TSRMLS_DC)
 {
-	headers_file = fopen("/internal/headers", "w");
+	headers_file = fopen("/request/headers", "w");
 	if (headers_file == NULL)
 	{
 		return FAILURE;

packages/php-wasm/compile/php/phpwasm-emscripten-library-file-locking-for-node.js

@@ -754,34 +754,37 @@ const LibraryForFileLocking = {
 #if ASYNCIFY == 2
 		return Asyncify.handleAsync(async () => {
 #endif
+			// We have to get the VFS path from the file descriptor
+			// before closing it.
+			const [vfsPath, vfsPathResolutionErrno] =
+				locking.get_vfs_path_from_fd(fd);
+
 			const fdCloseResult = _builtin_fd_close(fd);
 			if (fdCloseResult !== 0 || !locking.maybeLockedFds.has(fd)) {
 				_js_wasm_trace('fd_close(%d) result %d', fd, fdCloseResult);
 				return fdCloseResult;
 			}
 
-			try {
-				const [vfsPath, pathResolutionErrno] =
-				locking.get_vfs_path_from_fd(fd);
-				if (pathResolutionErrno !== 0) {
-					_js_wasm_trace(
-						'fd_close(%d) get_vfs_path_from_fd error %d',
-						fd,
-						pathResolutionErrno
-					);
-					/*
-					 * It looks like the file may have had an associated lock,
-					 * but since we cannot look up the path,
-					 * there is nothing more for us to do.
-					 *
-					 * NOTE: This seems possible for files that are locked and
-					 * then unlinked before close. It is an opportunity for a
-					 * lock to be orphaned in the lock manager.
-					 * @TODO: Explore how to ensure cleanup in this case.
-					 */
-					return fdCloseResult;
-				}
+			if (vfsPathResolutionErrno !== 0) {
+				_js_wasm_trace(
+					'fd_close(%d) get_vfs_path_from_fd error %d',
+					fd,
+					vfsPathResolutionErrno
+				);
+				/*
+				 * It looks like the file may have had an associated lock,
+				 * but since we cannot look up the path,
+				 * there is nothing more for us to do.
+				 *
+				 * NOTE: This seems possible for files that are locked and
+				 * then unlinked before close. It is an opportunity for a
+				 * lock to be orphaned in the lock manager.
+				 * @TODO: Explore how to ensure cleanup in this case.
+				 */
+				return fdCloseResult;
+			}
 
+			try {
 				const nativeFilePath =
 					locking.get_native_path_from_vfs_path(vfsPath);
 #if ASYNCIFY == 2

packages/php-wasm/compile/php/phpwasm-emscripten-library.js

@@ -10,7 +10,7 @@
 const LibraryExample = {
 	// Emscripten dependencies:
 	$PHPWASM__deps: ['$allocateUTF8OnStack'],
-	$PHPWASM__postset: 'PHPWASM.init();',
+	$PHPWASM__postset: 'PHPWASM.init(PHPLoader?.phpWasmInitOptions);',
 
 	// Functions not exposed to C but available in the generated
 	// JavaScript library under the PHPWASM object:
@@ -28,7 +28,7 @@ const LibraryExample = {
 		// emscripten_O_NDELAY |
 		// emscripten_O_DIRECT |
 		// emscripten_O_NOATIME
-		init: function () {
+		init: function (phpWasmInitOptions) {
 			Module['ENV'] = Module['ENV'] || {};
 			// Ensure a platform-level bin directory for a fallback `php` binary.
 			Module['ENV']['PATH'] = [
@@ -38,28 +38,48 @@ const LibraryExample = {
 				.filter(Boolean)
 				.join(':');
 
-			// The /internal directory is required by the C module. It's where the
+			// The /request directory is required by the C module. It's where the
 			// stdout, stderr, and headers information are written for the JavaScript
-			// code to read later on.
+			// code to read later on. This is per-request state that is isolated to a
+			// single PHP process.
+			FS.mkdir('/request');
+			// The /internal directory is shared amongst all PHP processes
+			// and contains wp-config.php, constants, etc.
 			FS.mkdir('/internal');
+
+			if (phpWasmInitOptions?.nativeInternalDirPath) {
+				FS.mount(
+					FS.filesystems.NODEFS,
+					{ root: phpWasmInitOptions.nativeInternalDirPath },
+					'/internal'
+				);
+			}
+
 			// The files from the shared directory are shared between all the
 			// PHP processes managed by PHPProcessManager.
-			FS.mkdir('/internal/shared');
+			FS.mkdirTree('/internal/shared');
+
 			// The files from the preload directory are preloaded using the
 			// auto_prepend_file php.ini directive.
-			FS.mkdir('/internal/shared/preload');
+			FS.mkdirTree('/internal/shared/preload');
 			// Platform-level bin directory for a fallback `php` binary. Without it,
 			// PHP may not populate the PHP_BINARY constant.
-			FS.mkdir('/internal/shared/bin');
+			FS.mkdirTree('/internal/shared/bin');
 			const originalOnRuntimeInitialized = Module['onRuntimeInitialized'];
 			Module['onRuntimeInitialized'] = () => {
-				// Dummy PHP binary for PHP to populate the PHP_BINARY constant.
-				FS.writeFile(
+				const { node: phpBinaryNode } = FS.lookupPath(
 					'/internal/shared/bin/php',
-					new TextEncoder().encode('#!/bin/sh\nphp "$@"')
+					{ noent_okay: true },
 				);
-				// It must be executable to be used by PHP.
-				FS.chmod('/internal/shared/bin/php', 0o755);
+				if (!phpBinaryNode) {
+					// Dummy PHP binary for PHP to populate the PHP_BINARY constant.
+					FS.writeFile(
+						'/internal/shared/bin/php',
+						new TextEncoder().encode('#!/bin/sh\nphp "$@"')
+					);
+					// It must be executable to be used by PHP.
+					FS.chmod('/internal/shared/bin/php', 0o755);
+				}
 				originalOnRuntimeInitialized();
 			};
 
@@ -77,7 +97,7 @@ const LibraryExample = {
 					return length;
 				},
 			});
-			FS.mkdev('/internal/stdout', FS.makedev(64, 0));
+			FS.mkdev('/request/stdout', FS.makedev(64, 0));
 
 			FS.registerDevice(FS.makedev(63, 0), {
 				open: () => {},
@@ -89,7 +109,7 @@ const LibraryExample = {
 					return length;
 				},
 			});
-			FS.mkdev('/internal/stderr', FS.makedev(63, 0));
+			FS.mkdev('/request/stderr', FS.makedev(63, 0));
 
 			FS.registerDevice(FS.makedev(62, 0), {
 				open: () => {},
@@ -101,7 +121,7 @@ const LibraryExample = {
 					return length;
 				},
 			});
-			FS.mkdev('/internal/headers', FS.makedev(62, 0));
+			FS.mkdev('/request/headers', FS.makedev(62, 0));
 
 			// Handle events.
 			PHPWASM.EventEmitter = ENVIRONMENT_IS_NODE