Build Metamask on Mac

build.md

• Prepare a working directory:

  (Optional) nvm is conflict with asdf, if nvm is installed, deactive it

  nvm unload
  rm -rf ~/.nvm # important, further steps will scan this path, remove or rename it

  Create a working directory:

  mkdir metamask
  cd metamask
  asdf local nodejs 14.9.1
  npm install -g npm
  npm install @sentry/cli
  npm install yarn
  asdf local ruby 3.1.2 # do not use system ruby

• Install the shared React Native dependencies

  • Install watchmen is recommended, but without it just works fine
  • Install Xcode and simulator: Manually download the simulator from direct link, move the dmg file to ~/Library/Caches/com.apple.dt.Xcode/Downloads
  • Rest steps:

    sudo gem install cocoapods
    npx react-native init AwesomeProject # trigger downloading cli

• Clone the repo and install dependencies:

  git clone ...
  cd metamask-mobile
  cp .ios.env.example .ios.env
  cp .js.env.example .js.env
  ../node_modules/.bin/yarn setup
  cd ios && pod install && cd .. # install pods for iOS

  Solution for unexpected end of JSON input error:

  yarn cache clean --force
  yarn cache clean --all
  yarn setup

  Solution for nvm is not compatible with the "PREFIX" environment variable error:

  Uninstall nvm or try edit metamask-mobile/node_modules/react-native/scripts/find-node.sh, according to this

• Run app:

  ../node_modules/.bin/yarn watch
  ../node_modules/.bin/yarn start:ios