Refactor variables

Author: Nick Litwin

webpack.config.js

@@ -1,10 +1,12 @@
 require('./node_modules/coffee-script/register')
 
-if (process.env.TRAVIS_BRANCH == 'master')         process.env.ENV = 'PROD'
-if (process.env.TRAVIS_BRANCH == 'qa-integration') process.env.ENV = 'QA'
-if (process.env.TRAVIS_BRANCH == 'dev')            process.env.ENV = 'DEV'
+const CI = process.env.TRAVIS_BRANCH
 
-var config = require('appirio-tech-webpack-config')({
+if (CI == 'master')         process.env.ENV = 'PROD'
+if (CI == 'qa-integration') process.env.ENV = 'QA'
+if (CI == 'dev')            process.env.ENV = 'DEV'
+
+const config = require('appirio-tech-webpack-config')({
   dirname: __dirname,
   entry: {
     app: './app/index'
@@ -16,6 +18,6 @@ var config = require('appirio-tech-webpack-config')({
   }
 })
 
-if (process.env.TRAVIS_BRANCH) config.output.publicPath = process.env.ASSET_PREFIX
+if (CI) config.output.publicPath = process.env.ASSET_PREFIX
 
 module.exports = config