Add trick in NodeJS port to support executing it from node command.

Author: viferga

source/ports/node_port/CMakeLists.txt

@@ -106,3 +106,22 @@ test_environment_variables(${target}
 	${TESTS_ENVIRONMENT_VARIABLES}
 	${TESTS_ENVIRONMENT_VARIABLES_COB}
 )
+
+# Detect exec with MetaCall CLI when this is being run with node
+set(NODEJS_EXECUTABLE_ONLY ON)
+
+find_package(NodeJS 10.22.0)
+
+if(NOT NODEJS_FOUND)
+	message(STATUS "NodeJS libraries not found")
+	return()
+endif()
+
+add_test(NAME ${target}_node_binary
+COMMAND ${TEST_COMMAND} "${NODEJS_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/node_integration.js | ${GREP_COMMAND} \"NodeJS Integration Test Passed\""
+	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+)
+test_environment_variables(${target}_node_binary
+	""
+	${TESTS_ENVIRONMENT_VARIABLES}
+)

source/ports/node_port/index.js

@@ -27,10 +27,42 @@ const addon = (() => {
 	try {
 		/* This forces metacall port to be run always by metacall cli */
 		return process.binding('node_loader_port_module');
-	} catch (e) {
-		console.error('MetaCall failed to load, probably you are importing this file from NodeJS directly.');
-		console.error('You should use MetaCall CLI instead. Install it from: https://github.com/metacall/install');
-		throw e;
+	} catch (_) {
+		const write = (data, cb) => {
+			if (!process.stdout.write(data)) {
+				process.stdout.once('drain', cb);
+			} else {
+				process.nextTick(cb);
+			}
+		};
+
+		/* Notify synchronously that we are launching MetaCall */
+		write('NodeJS detected, launching MetaCall...\n', () => {
+			try {
+				const { spawnSync } = require('child_process');
+				const args = [...process.argv];
+
+				args.shift();
+
+				const result = spawnSync('metacall', args, {});
+
+				if (result.error && result.error.code === 'ENOENT') {
+					write('MetaCall not found. Please install MetaCall from: https://github.com/metacall/install and run it again.\n', () => {
+						process.exit(1);
+					});
+				}
+
+				process.exit(result.status !== null ? result.status : 1);
+			} catch (e) {
+				const message = 'MetaCall failed to load, probably you are importing this file from NodeJS directly.\n'
+					+ e.message + '\n'
+					+ 'Install MetaCall from: https://github.com/metacall/install and run it again.\n';
+
+				write(message, () => {
+					throw e;
+				});
+			}
+		});
 	}
 })();
 

source/ports/node_port/test/node_integration.js

@@ -0,0 +1,23 @@
+/*
+ *	MetaCall NodeJS Port by Parra Studios
+ *	A complete infrastructure for supporting multiple language bindings in MetaCall.
+ *
+ *	Copyright (C) 2016 - 2021 Vicente Eduardo Ferrer Garcia <[email protected]>
+ *
+ *	Licensed under the Apache License, Version 2.0 (the "License");
+ *	you may not use this file except in compliance with the License.
+ *	You may obtain a copy of the License at
+ *
+ *		http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *	Unless required by applicable law or agreed to in writing, software
+ *	distributed under the License is distributed on an "AS IS" BASIS,
+ *	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *	See the License for the specific language governing permissions and
+ *	limitations under the License.
+ *
+ */
+
+require('../index.js');
+
+console.log('NodeJS Integration Test Passed');