Trying out expo 43

ios/Podfile

@@ -1,17 +1,19 @@
-require_relative '../node_modules/react-native/scripts/react_native_pods'
-require_relative '../node_modules/react-native-unimodules/cocoapods.rb'
-require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'
+require File.join(File.dirname(`node --print "require.resolve('expo/package.json')"`), "scripts/autolinking")
+require File.join(File.dirname(`node --print "require.resolve('react-native/package.json')"`), "scripts/react_native_pods")
+require File.join(File.dirname(`node --print "require.resolve('@react-native-community/cli-platform-ios/package.json')"`), "native_modules")
 
-platform :ios, '11.0'
+platform :ios, '12.0'
+
+require 'json'
+podfile_properties = JSON.parse(File.read('./Podfile.properties.json')) rescue {}
 
 target 'tooot' do
-  use_unimodules!
+  use_expo_modules!
   config = use_native_modules!
 
   use_react_native!(
     :path => config[:reactNativePath],
-    # to enable hermes on iOS, change `false` to `true` and then install pods
-    :hermes_enabled => false
+    :hermes_enabled => podfile_properties['expo.jsEngine'] == 'hermes'
   )
 
   # Enables Flipper.
@@ -22,5 +24,17 @@ target 'tooot' do
 
   post_install do |installer|
     react_native_post_install(installer)
+
+    # Workaround `Cycle inside FBReactNativeSpec` error for react-native 0.64
+    # Reference: https://github.com/software-mansion/react-native-screens/issues/842#issuecomment-812543933
+    installer.pods_project.targets.each do |target|
+      if (target.name&.eql?('FBReactNativeSpec'))
+        target.build_phases.each do |build_phase|
+          if (build_phase.respond_to?(:name) && build_phase.name.eql?('[CP-User] Generate Specs'))
+            target.build_phases.move(build_phase, 0)
+          end
+        end
+      end
+    end
   end
 end