title: React Native and build.gradle
body: <p>I am new to React Native and I work with a colleague on a new app. I created a new react native project which has generated a .gitgnore file as well. In it all the .gradle files (and thus the build.gradle file inside /android/ folder) are ignored. </p>
  
  <p>When I pushed the project to Github and my colleague pulled, he <code>npm install</code> to download the node_modules (which are also excluded &lt;- I have read the rational behind this) and then he run <code>react-native run-android</code>. This failed. We realised that if he creates the build.gradle file inside /android/ and copy-paste the contents of my build.gradle which I have locally (as is ignored by git) everything runs smoothly.</p>
  
  <p>My main questions are: 
  1) Should the build.gradle file be ignored as react native does by default? 
  2) If yes, how are teams supposed to work on a react native project if they somehow need to get the build.gradle contents to run the project on their side?
  3) What happens if my disk drive fails? I can pull everything from git but I will not have the build.gradle. Should I right it from scratch?</p>
  
  <p>The contents of the .gitignore file:</p>
  
  <pre><code># OSX
  #
  .DS_Store
  
  # Xcode
  #
  build/
  *.pbxuser
  !default.pbxuser
  *.mode1v3
  !default.mode1v3
  *.mode2v3
  !default.mode2v3
  *.perspectivev3
  !default.perspectivev3
  xcuserdata
  *.xccheckout
  *.moved-aside
  DerivedData
  *.hmap
  *.ipa
  *.xcuserstate
  project.xcworkspace
  
  # Android/IntelliJ
  #
  build/
  .idea
  .gradle
  local.properties
  *.iml
  
  # node.js
  #
  node_modules/
  npm-debug.log
  yarn-error.log
  
  # BUCK
  buck-out/
  \.buckd/
  *.keystore
  
  # fastlane
  #
  # It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
  # screenshots whenever they are needed.
  # For more information about the recommended setup visit:
  # https://docs.fastlane.tools/best-practices/source-control/
  
  */fastlane/report.xml
  */fastlane/Preview.html
  */fastlane/screenshots
  
  # Bundle artifact
  *.jsbundle
  </code></pre>