fix for broken headless operations

Fixes #724

Author: starpit

app/headless.js

@@ -248,6 +248,8 @@ function mimicDom(app, { createWindow }, localStorage) {
     const isVowel = c => c === 'a' || c === 'e' || c === 'i' || c === 'o' || c === 'u'
     const startsWithVowel = s => isVowel(s.charAt(0))
     global.ui.startsWithVowel = startsWithVowel
+
+    global.settings = require(require('path').join(__dirname, './build/config.json'))
 }
 
 const colorMap = {

app/plugins/ui/commands/openwhisk-core.js

@@ -747,7 +747,7 @@ const owOpts = (options = {}, execOptions = {}) => {
         options.agent = agent
     }
 
-    if (!process.env.TEST_SPACE && !process.env.TRAVIS && settings.userAgent) {
+    if (settings.userAgent && !process.env.TEST_SPACE && !process.env.TRAVIS) {
         // install a User-Agent header, except when running tests
         debug('setting User-Agent', settings.userAgent)
         options['User-Agent'] = settings.userAgent

tests/tests/passes/02/headless.js

@@ -24,7 +24,9 @@ const path = require('path'),
 
 const cli = {
     do: cmd => new Promise((resolve, reject) => {
-        const result = exec(`${fsh} ${cmd} --no-color`, (err, stdout, stderr) => {
+        const command = `${fsh} ${cmd} --no-color`
+
+        exec(command, (err, stdout, stderr) => {
             if (err) {
                 resolve({ code: err.code, output: stderr })
             } else {
@@ -79,6 +81,10 @@ const cli = {
 describe('Headless mode', function() {
     before(common.before(this, { noApp: true }))
 
+    it('should list sessions', () => cli.do('session list')
+       .then(cli.expectOK('ok'))
+       .catch(common.oops(this)))
+
     it('should show top-level help with no arguments', () => cli.do('')
        .then(cli.expectError(1, 'Shell Docs / Getting Started'))
        .catch(common.oops(this)))