Use Cordova iOS project in MS App Center without opening Xcode

cordova_appcenter.rb

#!/usr/bin/env ruby
require 'xcodeproj'

# This script allows you to build debug and/or appstore builds via MS App Center.
# Using a CI/CD the Cordova application gets build. The iOS project is then 
# committed to a separate repository which is connected to MS App Center.
# However, without opening the iOS project in Xcode first and setting up the 
# build settings and sharing the scheme, MS App Center can't build the app.
#
# This script creates two schemes. One for debug and one for release. In 
# MS App Center you should select <YourAppName>.xcworkspace and the scheme
# you would like to build. For example, you can setup a develop branch to 
# build and distribute a debug app and the master branch for a distribution
# (or ad-hoc) build and distribution.
#
# Change the settings below before running.
# 
# Install xcodeproj gem `sudo gem install xcodeproj -n /usr/local/bin`
# Run script using `ruby cordova_appcenter.rb`
#
# Using:
#  - cordova      v8.0.0
#  - cordova-ios  v4.5.4
#  - xcode        v9.2
#

# settings
path_to_xcodeproj = "platforms/ios/<YourAppName>.xcodeproj"

development_team = "xxxxxxx"

debug_settings = {
  "DEVELOPMENT_TEAM" => development_team,
  "PROVISIONING_PROFILE" => "xxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx",
  "PROVISIONING_PROFILE_SPECIFIER" => "xxxxxxxxxxxxx"
}

release_settings = {
  "DEVELOPMENT_TEAM" => development_team,
  "PROVISIONING_PROFILE" => "xxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx",
  "PROVISIONING_PROFILE_SPECIFIER" => "xxxxxxxxxxxxx"
}

def create_scheme(name, xcproj, settings)
  target = xcproj.targets[0]

  # update build settings
  configuration = xcproj.targets[0].build_configurations.find { |item| item.name === name }
  settings.each {|key, value| configuration.build_settings[key] = value }

  # create scheme
  scheme = Xcodeproj::XCScheme.new
  scheme.add_build_target(target)
  scheme.set_launch_target(target)

  scheme.test_action.build_configuration = name
  scheme.profile_action.build_configuration = name
  scheme.analyze_action.build_configuration = name
  scheme.archive_action.build_configuration = name

  scheme.save_as(xcproj.path, target.product_name + ' ' + name)
end

# open xcode project
xcproj = Xcodeproj::Project.open(path_to_xcodeproject)

# create two build schemes
create_scheme("Debug", xcproj, debug_settings)
create_scheme("Release", xcproj, release_settings)

# create TargetAttributes (it didn't work without)
xcproj.root_object.attributes['TargetAttributes'] = {}
xcproj.root_object.attributes['TargetAttributes'][xcproj.targets[0].uuid] = {
  "DevelopmentTeam" => development_team
}

xcproj.save()