Developer Setup

The following instructions apply to the mobile apps for iOS and Android built in React Native. Download the iOS version here and the Android version here. Source code can be found at https://github.com/mattermost/mattermost-mobile.

If you run into any issues getting your environment set up, check the Troubleshooting section at the bottom for common solutions.

A macOS computer is required to build the Mattermost iOS mobile app.

Environment Setup 

iOS and Android 

Install the following prerequisite software to develop and build the iOS or Android apps. For macOS, we recommend using Homebrew as a package manager.

Install NodeJS. 

This includes NPM which is also needed. Currently version 10.11.0 is recommended with npm 6.4.1. 11.x is not working.

MacOS 

• To install using Homebrew open a terminal and execute ..

  $ brew install node

• Install using NVM by following the instructions here

• Download and install the package from the NodeJS website

  Linux 

• Install using your distributions package manager (Note that different distros provide different node versions which might be lower than 10.11.0 and may cause problems)

• Install using NVM by following the instructions here

• Download and install the package from the NodeJS website

Install Watchman. (minimum required version is 4.9.0) 

MacOS 

• To install using Homebrew open a terminal and execute ..

  $ brew install watchman

  Linux 

• On Linux you have to build Watchman yourself. See the official Watchman guide.

  • Note that you need to increase your inotify limits for watchman to work properly
  • If you encounter a warning about a missing C++ compiler you need to install the c++ extension from you distros package manager (Ubuntu: g++, RHEL/Fedora: gcc-g++)

Install react-native-cli tools 

Use npm to install React Native CLI Tools globally (minimum required version is 2.0.1)

$ npm -g install react-native-cli

Obtaining the source code 

We use GitHub to host the source code so we recommend that you install Git to get the source code. Optionally, you can also contribute by submitting pull requests. If you do not have git installed you can do so with Homebrew by opening a terminal and executing:

MacOS 

$ brew install git

Linux 

Some distributions come with git preinstalled but you’ll most likely have to install it yourself. For most distributions the package is simply called git

Additional setup for iOS 

1. Install Xcode to build and run the app on iOS. (minimum required version is 10.0)
2. Install Cocoapods using the gem method. You’ll need it to install the project’s iOS dependencies. (required version is 1.6.1)

Additional setup for Android 

Download and install Android Studio or the Android SDK command line tools. 

Environment Variables 

Make sure you have the following ENV VARS configured: - ANDROID_HOME to where Android SDK is located (likely /Users/<username>/Library/Android/sdk or /home/<username>/Android/Sdk) - Make sure your PATH includes ANDROID_HOME/tools and ANDROID_HOME/platform-tools

MacOS 

• On Mac, this usually requires adding the following lines to your ~/.bash_profile file:

  export ANDROID_HOME=$HOME/Library/Android/sdk
  export PATH=$ANDROID_HOME/emulator:$ANDROID_HOME/platform-tools:$ANDROID_HOME/tools:$PATH

• Then reload your bash configuration:

  source ~/.bash_profile

Linux 

• On Linux the home folder is located under /home/<username> which results in a slightly different path

  export ANDROID_HOME=/home/<username>/Android/Sdk
  export PATH=$ANDROID_HOME/platform-tools:$PATH
  export PATH=$ANDROID_HOME/tools:$PATH

• Then also relead you configuration

  source ~/.bash_profile

  • Note that depending on the shell your using this might need to be put into a different file such as ~/.zshrc. Adjust this accordingly.
  • Also this documentation assumes you chose the default path for your Android SDK installation. If you chose a different path adjust accordingly.

Installing the right SDKs and SDK Tools 

In the SDK Manager using Android Studio or the Android SDK command line tool, ensure the following are installed - SDK Tools (you may have to click “Show Package Details” to expand packages) - Android SDK Build-Tools 28.0.3 - Android Emulator - Android SDK Platform-Tools - Android SDK Tools - Google Play services - Intel x86 Emulator Accelerator (HAXM installer) - Support Repository - Android Support Repository - Google Repository

• SDK Platforms (you may have to click “Show Package Details” to expand packages)
  • Android 6 (Marshmallow)
    • Google APIs
    • Android SDK Platform 26 and 27
    • Intel x86 Atom_64 System Image
  • Any other API version that you want to test

Obtaining the Source Code 

In order to develop and build the Mattermost mobile apps you’ll need to get a copy of the source code. Forking the mattermost-mobile repository will also make it easy to contribute your work back to the project in the future.

1. Fork the mattermost-mobile repository on GitHub.

2. Clone your fork locally:

   • Open a terminal
   • Change to a directory you want to hold your local copy
   • Run git clone https://github.com/<username>/mattermost-mobile.git if you want to use HTTPS, or git clone git@github.com:<username>/mattermost-mobile.git if you want to use SSH

   <username> refers to the username or organization in GitHub that forked the repository

3. Change the directory to mattermost-mobile.

   cd mattermost-mobile

4. Run make pre-run in order to install all the dependencies.