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The `react-native-xcode` script assumes the that `node_modules` folder are in the same location as the react native project. This adds the ability to declare `CUSTOM_DIR` in `.xcode.env` file to let react-native-xcode know where the react native project is located - required for monorepos

## Issue
At the moment if a project is not using the default react native file structure then when trying to create a build or archive using Xcode it will fail, with the following error:

> File /Users/itxch/Library/Developer/Xcode/DerivedData/app-evgjukoxhuupzzdglopjnhcntvpw/Build/Intermediates.noindex/ArchiveIntermediates/jungul/BuildProductsPath/Release-iphoneos/ does not exist. This must be a bug with React Native, please report it here:

## Background
My project is a monorepo, using `npm` workspaces.

#### This is the relevant file structure

This file structure is incompatible with line 63 of ``
Note: `$REACT_NATIVE_DIR` is the `react-native` package directory inside node modules.

So by default this sets project root to be the parent folder of the `node_modules` folder. However in my case this is not correct, it should actually be:

## Solution
Seeing as hardcoding the value would not work, the simplest solution is to set the directory via a variable
`$CUSTOM_DIR` can easily be set via `.xcode.env` file.

## Changelog
[IOS] [Added] - allow for custom project dir in react-native-xcode script

Pull Request resolved: #35449

Test Plan:
After updating my `.xcode.env` file to include `export CUSTOM_DIR=app`, I can successfully create a build or an archive.
If the variable is not set it will be black, so it will not effect `$PROJECT_ROOT`

Reviewed By: GijsWeterings

Differential Revision: D41529396

Pulled By: cortinico

fbshipit-source-id: 890e9867e31f83a08561df8c2de1069e771726fc


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React Native

Learn once, write anywhere:
Build mobile apps with React.

React Native is released under the MIT license. Current CircleCI build status. Current npm package version. PRs welcome! Follow @reactnative

Getting Started · Learn the Basics · Showcase · Contribute · Community · Support

React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.

  • Declarative. React makes it painless to create interactive UIs. Declarative views make your code more predictable and easier to debug.
  • Component-Based. Build encapsulated components that manage their state, then compose them to make complex UIs.
  • Developer Velocity. See local changes in seconds. Changes to JavaScript code can be live reloaded without rebuilding the native app.
  • Portability. Reuse code across iOS, Android, and other platforms.

React Native is developed and supported by many companies and individual core contributors. Find out more in our ecosystem overview.


📋 Requirements

React Native apps may target iOS 12.4 and Android 5.0 (API 21) or newer. You may use Windows, macOS, or Linux as your development operating system, though building and running iOS apps is limited to macOS. Tools like Expo can be used to work around this.

🎉 Building your first React Native app

Follow the Getting Started guide. The recommended way to install React Native depends on your project. Here you can find short guides for the most common scenarios:

📖 Documentation

The full documentation for React Native can be found on our website.

The React Native documentation discusses components, APIs, and topics that are specific to React Native. For further documentation on the React API that is shared between React Native and React DOM, refer to the React documentation.

The source for the React Native documentation and website is hosted on a separate repo, @facebook/react-native-website.

🚀 Upgrading

Upgrading to new versions of React Native may give you access to more APIs, views, developer tools, and other goodies. See the Upgrading Guide for instructions.

React Native releases are discussed in this discussion repo.

👏 How to Contribute

The main purpose of this repository is to continue evolving React Native core. We want to make contributing to this project as easy and transparent as possible, and we are grateful to the community for contributing bug fixes and improvements. Read below to learn how you can take part in improving React Native.

Code of Conduct

Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.

Contributing Guide

Read our Contributing Guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes to React Native.

Open Source Roadmap

You can learn more about our vision for React Native in the Roadmap.

Good First Issues

We have a list of good first issues that contain bugs which have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.


Larger discussions and proposals are discussed in @react-native-community/discussions-and-proposals.

📄 License

React Native is MIT licensed, as found in the LICENSE file.

React Native documentation is Creative Commons licensed, as found in the LICENSE-docs file.