Update Travis CI Scripts (#2804)

Author: Vasil Chimev

.travis.yml

@@ -24,7 +24,7 @@ after_success:
 - mkdir s3-publish
 - cp nativescript*.tgz s3-publish/nativescript.tgz
 before_deploy:
-- node .travis/add-publishConfig.js
+- node .travis/add-publishConfig.js $TRAVIS_BRANCH
 deploy:
   - provider: s3
     bucket: nativescript-ci

.travis/add-publishConfig.js

@@ -1,11 +1,11 @@
 #!/usr/bin/env node
 
-var fsModule = require('fs');
+var fsModule = require("fs");
 
 // Adds a publishConfig section to the package.json file
 // and sets a tag to it
 
-var path = './package.json';
+var path = "./package.json";
 var fileOptions = {encoding: "utf-8"};
 var content = fsModule.readFileSync(path, fileOptions);
 
@@ -14,11 +14,12 @@ if (!packageDef.publishConfig) {
     packageDef.publishConfig = {};
 }
 
-if ($TRAVIS_BRANCH === 'release') {
-    packageDef.publishConfig.tag = 'rc';
-} else {
-    packageDef.publishConfig.tag = 'next';
+var branch = process.argv[2];
+if (!branch) {
+    console.log("Please pass the branch name as an argument!");
+    process.exit(1);
 }
+packageDef.publishConfig.tag = branch === "release" ? "rc" : "next";
 
-var newContent = JSON.stringify(packageDef, null, '  ');
+var newContent = JSON.stringify(packageDef, null, "  ");
 fsModule.writeFileSync(path, newContent, fileOptions);