Run yarn install during create-react-app to prevent yarn.lock from changing

[JBallin]

Is this a bug report?

yes

Which terms did you search for in User Guide?

"yarn install"

Environment

Environment:
  OS:  macOS High Sierra 10.13.6
  Node:  8.11.3
  Yarn:  1.9.4
  npm:  5.6.0
  Watchman:  Not Found
  Xcode:  Xcode 9.4.1 Build version 9F2000
  Android Studio:  Not Found

Packages: (wanted => installed)
  react: ^16.4.2 => 16.4.2
  react-dom: ^16.4.2 => 16.4.2
  react-scripts: 1.1.4 => 1.1.4

Steps to Reproduce

$ npx create-react-app yarn-test
$ cd yarn-test
$ git init
$ git add .
$ git commit -m "Initial commit"
$ yarn install
$ git status
modified:   yarn.lock

Expected Behavior

No changes to yarn lock file, should automatically run yarn install when creating the app.

Actual Behavior

yarn.lock had changes to commit

[kimberlyluna]

I was able to reproduce this scenario. I'm not sure if this is a bug, my differences with master on the yarn.lock where the following using yarns version 1.9.2.

Yarn performs some "improvements" on the lock file after adding or upgrading dependecies.I think it can be a good idea what you request just to avoid that extra step.

[Timer]

Sorry, but this was a conscious decision.