Add/configure new entitlements to project

Fastfile

def ios_add_push_entitlements(project_path)
  entitlements_template_name = "app-template.entitlements"
  entitlements_template_path = File.absolute_path entitlements_template_name
  entitlements_template = File.read(entitlements_template_path)
  
  # Replacing entitlement template with debug info
  debug_file_name = "app-debug.entitlements"
  debug_file = File.new(, "w")
  debug_file.puts entitlements_template
    .gsub("REPLACE_ENVIRONMENT", "debug")
    .gsub("REPLACE_BUNDLE_ID", "com.joshiscool.app")
  debug_file.close
  
  # Replacing entitlement template with release info
  release_file_name = "app-release.entitlements"
  release_file = File.new(, "w")
  release_file.puts entitlements_template
    .gsub("REPLACE_ENVIRONMENT", "debug")
    .gsub("REPLACE_BUNDLE_ID", "com.joshiscool.app")
  release_file.close
  
  # Opening project
  require 'xcodeproj'
  xcproj = Xcodeproj::Project.open(project_path)
  
  # Adding these new entitlement files to the project (if they don't exist already)
  file_names = xcproj.files.map(&:name)
  xcproj.new_file(debug_file_name) unless file_names.include? debug_file_name
  xcproj.new_file(release_file_name) unless file_names.include? release_file_name
  
  # Setting the entitlements per target
  xcproj.targets.each do |target|
    target.build_configurations.each do |config|
      entitlement = config.name == "Release" ? release_file_name : debug_file_name
      config.build_settings['CODE_SIGN_ENTITLEMENTS'] = entitlement
    end
  end
  xcproj.save
end