fix: pod install fails in monorepos using React Native 0.60 (#102)

React Native 0.60 depends on `@react-native-community/cli` 2.x which
doesn't fully support monorepos. It requires one to specify a custom
project root, which we removed when bumping to RN 0.61 because the
parameter has been deprecated in `@react-native-community/cli` 3.x.

Author: tido64

example/ios/Podfile.lock

@@ -1,7 +1,7 @@
 PODS:
   - boost-for-react-native (1.63.0)
   - DoubleConversion (1.1.6)
-  - Example-Tests (0.1.0):
+  - Example-Tests (0.1.1):
     - React
   - FBLazyVector (0.61.5)
   - FBReactNativeSpec (0.61.5):
@@ -220,7 +220,7 @@ PODS:
     - React-cxxreact (= 0.61.5)
     - React-jsi (= 0.61.5)
     - ReactCommon/jscallinvoker (= 0.61.5)
-  - ReactTestApp-DevSupport (0.1.0)
+  - ReactTestApp-DevSupport (0.1.1)
   - ReactTestApp-Resources (1.0.0-dev)
   - SwiftLint (0.39.1)
   - Yoga (1.14.0)
@@ -327,7 +327,7 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   boost-for-react-native: 39c7adb57c4e60d6c5479dd8623128eb5b3f0f2c
   DoubleConversion: 5805e889d232975c086db112ece9ed034df7a0b2
-  Example-Tests: 7debc03c2ca685758cb528ab497c9a7e4e13ca8e
+  Example-Tests: 0162528650caf3dc473ba08984c5ed811c3e0732
   FBLazyVector: aaeaf388755e4f29cd74acbc9e3b8da6d807c37f
   FBReactNativeSpec: 118d0d177724c2d67f08a59136eb29ef5943ec75
   Folly: 30e7936e1c45c08d884aa59369ed951a8e68cf51
@@ -352,7 +352,7 @@ SPEC CHECKSUMS:
   React-RCTText: 9ccc88273e9a3aacff5094d2175a605efa854dbe
   React-RCTVibration: a49a1f42bf8f5acf1c3e297097517c6b3af377ad
   ReactCommon: 198c7c8d3591f975e5431bec1b0b3b581aa1c5dd
-  ReactTestApp-DevSupport: 727845b0cc18f6fdd84c0cbd622dd6e6314b6b66
+  ReactTestApp-DevSupport: dd44c3011f367ab72f51ff61fdb7c9c0e525eccf
   ReactTestApp-Resources: c070f72dfcb2806d922eec6656259cbf7a4d2bcf
   SwiftLint: 55e96a4a4d537d4a3156859fc1c54bd24851a046
   Yoga: f2a7cd4280bfe2cca5a7aed98ba0eb3d1310f18b

example/macos/Podfile.lock

@@ -217,7 +217,7 @@ PODS:
     - React-cxxreact (= 0.61.39)
     - React-jsi (= 0.61.39)
     - ReactCommon/jscallinvoker (= 0.61.39)
-  - ReactTestApp-DevSupport (0.1.0)
+  - ReactTestApp-DevSupport (0.1.1)
   - ReactTestApp-Resources (1.0.0-dev)
   - SwiftLint (0.39.2)
   - Yoga (1.14.0)
@@ -344,7 +344,7 @@ SPEC CHECKSUMS:
   React-RCTText: e81f5065516561545ae40f2c5b84d7b14fe6baec
   React-RCTVibration: 2ab29818330374b02167caac117d609159f360ab
   ReactCommon: e24f8c0d974cdb872d73cbd87cdfea9d72cfae26
-  ReactTestApp-DevSupport: 727845b0cc18f6fdd84c0cbd622dd6e6314b6b66
+  ReactTestApp-DevSupport: dd44c3011f367ab72f51ff61fdb7c9c0e525eccf
   ReactTestApp-Resources: c070f72dfcb2806d922eec6656259cbf7a4d2bcf
   SwiftLint: 22ccbbe3b8008684be5955693bab135e0ed6a447
   Yoga: 9cc54b8ca13d6fa87f8214c6eac97745e1df8092

ios/test_app.rb

@@ -17,6 +17,11 @@ def autolink_script_path
   File.join(package_path, 'native_modules')
 end
 
+def autolink_script_version
+  package_path = resolve_module('@react-native-community/cli-platform-ios')
+  package_version(package_path)[:major].to_i
+end
+
 def find_file(file_name, current_dir)
   return if current_dir.expand_path.to_s == '/'
 
@@ -42,6 +47,11 @@ def nearest_node_modules(project_root)
   path
 end
 
+def package_version(package_path)
+  package_json = JSON.parse(File.read(File.join(package_path, 'package.json')))
+  package_json['version'].match(/(?<major>\d+)\.(?<minor>\d+)\.(?<patch>\d+)/)
+end
+
 def resolve_module(request)
   script = "console.log(path.dirname(require.resolve('#{request}/package.json')));"
   Pod::Executable.execute_command('node', ['-e', script], true).strip
@@ -85,9 +95,7 @@ def resources_pod(project_root, target_platform)
 
 def use_react_native!(project_root, target_platform)
   react_native = Pathname.new(resolve_module('react-native'))
-
-  package_json = JSON.parse(File.read(File.join(react_native.to_s, 'package.json')))
-  version = package_json['version'].match(/(?<major>\d+)\.(?<minor>\d+)\.(?<patch>\d+)/)
+  version = package_version(react_native.to_s)
 
   if version[:major] == '0' && version[:minor] == '60'
     require_relative('use_react_native-0.60')
@@ -102,6 +110,7 @@ def use_react_native!(project_root, target_platform)
                         project_root)
 end
 
+# rubocop:disable Metrics/CyclomaticComplexity,Metrics/PerceivedComplexity
 def use_test_app_internal!(target_platform)
   assert(%i[ios macos].include?(target_platform), "Unsupported platform: #{target_platform}")
 
@@ -123,8 +132,10 @@ def use_test_app_internal!(target_platform)
   end
 
   # Shared code lives in `ios/ReactTestApp/`
-  source = File.expand_path(File.join(__dir__, 'ReactTestApp'))
-  FileUtils.ln_sf(source, File.join(destination, 'ReactTestAppShared'))
+  if target_platform != :ios
+    source = File.expand_path(File.join(__dir__, 'ReactTestApp'))
+    FileUtils.ln_sf(source, File.join(destination, 'ReactTestAppShared'))
+  end
 
   require_relative(autolink_script_path)
 
@@ -145,7 +156,11 @@ def use_test_app_internal!(target_platform)
 
     yield ReactTestAppTargets.new(self) if block_given?
 
-    use_native_modules!
+    if autolink_script_version == 2
+      use_native_modules! '.'
+    else
+      use_native_modules!
+    end
   end
 
   post_install do
@@ -156,6 +171,7 @@ def use_test_app_internal!(target_platform)
     puts ''
   end
 end
+# rubocop:enable Metrics/CyclomaticComplexity,Metrics/PerceivedComplexity
 
 class ReactTestAppTargets
   def initialize(podfile)