Rebase react-native-xcode.sh off [email protected]

[yenbekbay]

Description of changes

I was getting the following error while trying to build the bundle with the current react-native-xcode.sh script:

After some debugging, I found the cause to be the fact that metro config in [email protected] doesn't define ios as a valid platform by default.

In a normal setup, this wouldn't be a problem because ios is picked up automatically in the root of an RN project. However, my project had a script called react-native-bundle.sh in /ios/Build-Phases and performing cd .. changed the current directory to /ios as opposed to /.

The updated react-native-xcode.sh avoids that problem by using an absolute path for changing the current directory.

Related issues (if any)

#57 might possibly be addressed because you can know override the entry file by using the ENTRY_FILE environment variable.

[thekevinbrown]

Thanks so much for doing this. I don't currently have a v60 project I can test with, so I can't test this much without a lot of setup.

I'll go ahead and release this on a v3.0.0alpha version number so others can give it a go on their projects easily.