Minor issues on Android

[giuliopaci]

I am trying to study react-native directly on my phone. I am able to perform basic development on the phone, but I have to workaround a couple of annoying issues.

Environment

Environment:
OS: android
Node: 8.9.4
Yarn: 1.3.2
npm: 4.6.1
Watchman: Not Found
Xcode: N/A
Android Studio: Not Found

Packages: (wanted => installed)
react: 16.2.0 => 16.2.0
react-native: 0.52.0 => 0.52.0

Expected Behavior

create-react-native-app applicationname should work and the created application project should be usable.

Actual Behavior

1. the creation procedure fails with the following error:

ngrok - error unpacking binary { Error: ENOENT: no such file or directory, open '/data/data/com.termux/files/home/test2/pippo/node_modules/@expo/ngrok/bin/ngrok-stable-android-arm64.zip'
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '/data/data/com.termux/files/home/test2/pippo/node_modules/@expo/ngrok/bin/ngrok-stable-android-arm64.zip' }

I was able to skip this issue by just copying ngrok-stable-linux-arm.zip into /data/data/com.termux/files/home/test2/pippo/node_modules/@expo/ngrok/bin/ngrok-stable-android-arm64.zip in a continuous loop during the creation process;
2. Created project is not working because os.cpus() is undefined. I was able to workaround this by patching node_modules/metro/src/lib/getMaxWorkers.js and node_modules/metro/src/lib/getMaxWorkers.js.flow with a change like const cores = (os.cpus() || {length: 1}).length;.

Steps to Reproduce

On an Android system with Oreo, install Termux, then in Termux install npm, patch npm as described in github.com/termux/termux-packages/issues/1798, use npm to install npm version 4.6.1, use npm 4.6.1 to install react-native, try to create a new project.

[react-native-bot]

Thanks for posting this! It looks like your issue may refer to an older version of React Native. Can you reproduce the issue on the latest stable release?

Thank you for your contributions.

_{How to Contribute • What to Expect from Maintainers}

[giuliopaci]

I have not tried with a recent version, but the issue is present with the most recent create-react-native-app, which is not installing 0.54. Best, Giulio Il 05 mar 2018 18:21, "React Native Bot" <notifications@github.com> ha scritto: Thanks for posting this! It looks like your issue may refer to an older version of React Native. Can you reproduce the issue on the latest stable release <http://facebook.github.io/react-native/versions.html>? Thank you for your contributions. How to Contribute <https://facebook.github.io/react-native/docs/contributing.html#bugs> • What to Expect from Maintainers <https://facebook.github.io/react-native/docs/maintainers.html#handling-issues> — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#18185 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AATBq3bU4hkHpaCiYp4Y7YUcoGovHglxks5tbXO-gaJpZM4Sba7S> .

[react-native-bot]

Thanks for reporting this! The CRNA tool is maintained by the community and it has its own repo. Do you mind reporting your issue at https://github.com/react-community/create-react-native-app ? Thanks!