Merge pull request #139 from minggangw/fix-issue-136

Leverage python launcher on windows platform

Author: Minggang Wang

rosidl_parser/py_utils.js

@@ -0,0 +1,28 @@
+// Copyright (c) 2017 Intel Corporation. All rights reserved.
+//
+// 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.
+
+'use strict';
+
+const os = require('os');
+
+let pyUtils = {
+  getPython(py) {
+    if (os.type() === 'Windows_NT') {
+      py = (py === 'python') ? 'py -2' : 'py -3';
+    }
+    return py;
+  }
+};
+
+module.exports = pyUtils;

rosidl_parser/rosidl_parser.js

@@ -16,8 +16,9 @@
 
 const os = require('os');
 const exec = require('child_process').exec;
+const pyUtils = require('./py_utils');
 
-const pythonExe = (os.type() === 'Windows_NT') ? 'python' : 'python3';
+const pythonExe = pyUtils.getPython('python3');
 
 let rosidlParser = {
   parseMessageFile(packageName, filePath) {