Allow en-US metadata to differ from default ones when intentional

Author: AliSoftware

fastlane/Fastfile

@@ -90,6 +90,11 @@ GLOTPRESS_APP_STRINGS_PROJECT_URL = 'https://translate.wordpress.com/projects/wo
 # URL of the GlotPress project containing App Store Connect metadata
 GLOTPRESS_APP_STORE_METADATA_PROJECT_URL = 'https://translate.wordpress.com/projects/woocommerce/woocommerce-ios/release-notes/'
 
+# Set this to `true` if it's intentional that `fastlane/metadata/en-US/` has some `.txt` files overriding the ones in `fastlane/metadata/default/`
+# (i.e. you want the `en-US` metadata copies to be _different_ from the metadata copies used as base and fallback for the translation in other locales)
+# Set this to `false` otherwise, so that we prevent the accidental case of forgetting to update the `en-US` metadata copies when updating the `default`
+# copies during an ASO update, if it was not the intention for those to differ.
+ALLOW_EN_US_METADATA_TO_DIFFER_FROM_DEFAULT_LOCALE = true
 # List of locales used for the app strings (GlotPress code => `*.lproj` folder name`)
 #
 # TODO: Replace with `LocaleHelper` once provided by release toolkit (https://github.com/wordpress-mobile/release-toolkit/pull/296)
@@ -1042,11 +1047,13 @@ platform :ios do
     files_to_commit = [File.join(metadata_directory, '**', '*.txt')]
 
     # Ensure that none of the `.txt` files in `en-US` would accidentally override our originals in `default`
-    target_files.values.map { |h| h[:desc] }.each do |file|
-      en_file_path = File.join(metadata_directory, 'en-US', file)
-      if File.exist?(en_file_path)
-        UI.user_error!("File `#{en_file_path}` would override the same one in `#{metadata_directory}/default`, but `default/` is the source of truth. " \
-                       + "Delete the `#{en_file_path}` file, ensure the `default/` one has the expected original copy, and try again.")
+    unless ALLOW_EN_US_METADATA_TO_DIFFER_FROM_DEFAULT_LOCALE
+      target_files.values.map { |h| h[:desc] }.each do |file|
+        en_file_path = File.join(metadata_directory, 'en-US', file)
+        if File.exist?(en_file_path)
+          UI.user_error!("File `#{en_file_path}` would override the same one in `#{metadata_directory}/default`, but `default/` is the source of truth. " \
+                         + "Delete the `#{en_file_path}` file, ensure the `default/` one has the expected original copy, and try again.")
+        end
       end
     end