title: gitlab pipeline on sub projects
body: <p>Suppose main project has sub-projects</p>
  
  <pre><code>MainProject/
         \-------- android
                     \-------- .gitlab-ci-android.yml
         \-------- ios
         \-------- lib
         \-------- .gitlab-ci.yml
  </code></pre>
  
  <p>I want my <strong>.gitlab-ci.yml</strong> to run parallel jobs for each subfolder. My goal is to have separate <strong>.gitlab-ci.yml</strong> files. Yes, it looks messy to touch only one file when you have to configure the CI of a few projects.</p>
  
  <p>What is the exact command line to run jobs from the main <strong>.gitlab-ci.yml</strong>?</p>
  
  <p>I tried with , but not working</p>
  
  <pre><code>jobAndroid:
    script: "gitlab-runner exec android/.gitlab-ci-android.yml"
  </code></pre>