add node-getmac modules

node_modules/node-getmac/index.js

@@ -0,0 +1,36 @@
+/**
+ * @file get local mac address
+ * @author liulangyu(liulangyu90316@gmail.com)
+ */
+
+var execSync = require('child_process').execSync;
+var platform = process.platform;
+
+module.exports = (function () {
+    var cmd = {
+        win32: 'getmac',
+        darwin: 'ifconfig -a',
+        linux: 'ifconfig -a || ip link'
+    }[platform];
+
+    var regStr = '((?:[a-z0-9]{2}[:-]){5}[a-z0-9]{2})';
+
+    var macReg = new RegExp('ether\\s' + regStr + '\\s', 'i');
+
+    try {
+        var data = execSync(cmd).toString();
+        var res = {
+            win32: new RegExp(regStr, 'i').exec(data),
+            darwin: macReg.exec(data),
+            linux: macReg.exec(data)
+        }[platform];
+
+
+        if (res) {
+            return res[1];
+        }
+    }
+    catch (e) {
+        return '';
+    }
+})();