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David Angulo
cb7f1b1f0b
Summary:
When updating the Ruby version, 2 files are always needed to be updated (`.ruby-version` and `Gemfile`). When not in sync it can lead to an error like `Your Ruby version is 2.7.6, but your Gemfile specified 2.7.5`.
This lessens the files that need to be updated when upgrading the Ruby version and makes it in sync always. It makes the `.ruby-version` the source of truth.
### Example 1:
<img width="481" alt="Screenshot 2022-11-20 at 13 56 08" src="https://user-images.githubusercontent.com/36528176/202888191-450ab6d0-32a4-4d37-ad82-0beb2b22fa82.png">
When upgrading from `0.70.0` to `0.71.0-rc.0`. 2 files needs to be updated when it could have been just 1.
Source: https://react-native-community.github.io/upgrade-helper/?from=0.70.0&to=0.71.0-rc.0
### Example 2:
21c8837c12 updates 4 files (`.ruby-version`, `Gemfile`, `template/Gemfile`, `template/_ruby-version`) when it could have been just 2.
### Other Sources:
* https://andycroll.com/ruby/read-ruby-version-in-your-gemfile/
* https://render.com/docs/ruby-version (Heroku alternative)
* https://stackoverflow.com/a/35823132/9375533
## Changelog
[General] [Changed] - Read `.ruby-version` file in `Gemfile`
Pull Request resolved: https://github.com/facebook/react-native/pull/35410
Test Plan: Only `.ruby-version` and `template/_ruby-version` needs to be updated when upgrading Ruby version.
Reviewed By: christophpurrer, cipolleschi
Differential Revision: D41429147
Pulled By: rshest
fbshipit-source-id: 9e541a1d84aed5dca1e6f465c61bb0ba15574211
