CD for Expo RN applications

deploy-expo-ios.sh

#! /usr/bin/env bash
set -e

# This is based on the expo blogpost:
# https://blog.expo.io/automating-standalone-expo-app-builds-and-deployments-with-fastlane-exp-and-exptool-9b2f5ad0a2cd

# Publish `production` release to Expo
function publish_expo() {
  # Log into Expo when running in CI
  # Locally you should already be logged in
  if [ "$CI" = true ]; then
    exp login -u "$EXPO_USERNAME" -p "$EXPO_PASSWORD" --non-interactive
  fi

  echo "-----Publish production release-----"
  exp publish --release-channel production --non-interactive
}

# Build standalone iOS binary using release type 'production'
function build_ios() {
  echo "-----Starting iOS production build-----"
  exp build:ios --release-channel production --non-interactive
  echo "-----Downloading iOS .ipa from latest build result-----"
  curl -o app.ipa "$(exp url:ipa --non-interactive)"
}

# Submit the built binary to iTunes Connect
function upload_ios() {
  export DELIVER_USERNAME="$ITUNES_CONNECT_USERNAME"
  export DELIVER_PASSWORD="$ITUNES_CONNECT_PASSWORD"
  echo "-----Uploading .ipa to iTunes Connect through Fastlane-----"
  fastlane deliver --verbose --ipa "app.ipa" --skip_screenshots --skip_metadata
}

function deploy_ios() {
  publish_expo
  build_ios
  upload_ios

  # Log out of expo when on CI, local should not log out
  if [ "$CI" = true ]; then
    exp logout
  fi
}
deploy_ios

Example of a modified version of Expo's deploy script for iOS.
We're using this together with Bitbucket Pipelines which runs a Docker container loaded with node, exp and fastlane to continuously integrate & deploy an Expo RN application.