title: xcodebuild: error: 'APP.xcworkspace' does not exist
body: <p>I am trying to set up CI with gitlab. When I try to build locally, I get this error : <code>xcodebuild: error: 'APP.xcworkspace' does not exist.</code>
  "APP" not being the real name. I am also using CocoaPods.</p>
  
  <p>This happens after I run this command in terminal:
  <code>gitlab-ci-multi-runner exec shell build_project</code></p>
  
  <p>I have checked and the file does exist in the same folder I call the command.</p>
  
  <p>This is my .gitlab-ci.yml file:</p>
  
  
  
  <pre class="lang-yaml prettyprint-override"><code>stages:
    - build
  
  build_project:
    stage: build
    script:
      - xcodebuild clean -workspace APP.xcworkspace -scheme APP | xcpretty
      - xcodebuild test -workspace APP.xcworkspace -scheme APP -destination 'platform=iOS Simulator,name=iPhone 7,OS=10.2' | xcpretty -s
    tags:
      - v0.0.1
  </code></pre>
  
  
  
  <p>Xcode version: 8.2.1</p>
  
  <p>Cocoapods version: 1.2.0</p>
  
  <p>Gitlab-runner version : 1.11.0</p>
  
  <p>Alex</p>