Merge pull request #39 from dart-native/feature/nodejs_available

feat: 兼容低版本 nodejs

Author: yulingtianxia

lib/java/DNJavaConverter.js

@@ -4,7 +4,14 @@ var JavaLexer = require('../../parser/java/Java9Lexer').Java9Lexer
 var JavaParser = require('../../parser/java/Java9Parser').Java9Parser
 var DNJavaParserListener = require('./DNJavaParserListener').DNJavaParserListener
 var ConsoleErrorListener = require('antlr4/error/ErrorListener').ConsoleErrorListener
-const { parentPort, workerData } = require('worker_threads')
+
+let parentPort, workerData
+try {
+    parentPort = require('worker_threads').parentPort
+    workerData = require('worker_threads').workerData
+} catch (error) {
+    console.log('NodeJS version is too low. Running on slow mode.')
+}
 
 function convert(path, cb) {
     if (!path) {

lib/main.js

@@ -2,7 +2,15 @@ const { execSync } = require('child_process')
 const fs = require("fs")
 const path = require("path")
 const yaml = require('js-yaml')
-const { Worker } = require('worker_threads')
+let Worker
+let isSupportWorkerThreads = false
+try {
+    Worker = require('worker_threads').Worker
+    isSupportWorkerThreads = true
+} catch (error) {
+    console.log('NodeJS version is too low. Running on slow mode.')
+}
+
 
 var outputDir
 var projectName
@@ -78,7 +86,7 @@ function writeDependencyToPubSpec(filePath) {
 
 function generateDartWithWorker(path, script) {
     return new Promise((resolve, reject) => {
-        if (this.isDebug) {
+        if (this.isMainThread) {
             const convert = require(script).convert
             convert(path, (result, path, error) => {
                 resolve({ result: result, path: path, error: error })
@@ -119,8 +127,8 @@ function checkTemplateValid(template) {
     return template == 'plugin' || template == 'package'
 }
 
-async function main(input, options, debug = false) {
-    this.isDebug = debug
+async function main(input, options, onMainThread = !isSupportWorkerThreads) {
+    this.isMainThread = onMainThread
 
     language = options.language
     if (!language) {

lib/objc/DNObjectiveCConverter.js

@@ -4,7 +4,15 @@ let ObjectiveCLexer = require('../../parser/objc/ObjectiveCLexer').ObjectiveCLex
 let ObjectiveCParser = require('../../parser/objc/ObjectiveCParser').ObjectiveCParser
 let DNObjectiveCParserListener = require('./DNObjectiveCParserListener').DNObjectiveCParserListener
 let ConsoleErrorListener = require('antlr4/error/ErrorListener').ConsoleErrorListener
-const { parentPort, workerData } = require('worker_threads')
+
+let parentPort, workerData
+try {
+    parentPort = require('worker_threads').parentPort
+    workerData = require('worker_threads').workerData
+} catch (error) {
+    console.log('NodeJS version is too low. Running on slow mode.')
+}
+
 
 function convert(path, cb) {
     if (!path) {