atacan/DiscussionStringCatalogPackage

Introduction

• This project is created to discuss the string catalog usage in a Swift package and an app target.
• An app using this package is created inside DiscussStringCatalogAppUsingPackage. You can use it for reproduction of the problem.
• The package was dragged own drop to the Xcode project as local swift package.
• Xcode Version 15.3 (15E204a)
• macOS 14.4 (23E214)

Scenario One: The Swift package has a string catalog and the app target does not

• The target in the Package.swift file has resources: [.process("Resources")]. This Resources folder has a string catalog.
• The string catalog is correctly populated by the compiler
• The German translations are added to the catalog
• One of the Text views is using Bundle.module to see if it works
  • Text("this text has a German translation in the catalog", bundle: .module)
• The scheme run options is changed to German
• On the UI I see English text
• Xcode shows the following warning

ERROR: this text has a German translation in the catalog 
not found in table Localizable of bundle CFBundle 0x6000024f5a40 
</Users/atacan/Library/Developer/Xcode/DerivedData/DiscussStringCatalogAppUsingPackage-djgqsvpidusfvabiivpoothnzbus/Build/Products/Debug/DiscussStringCatalogAppUsingPackage.app/Contents/Resources/DiscussionStringCatalogPackage_DiscussionStringCatalogPackage.bundle> 
(not loaded)

• I open the contents of the DiscussionStringCatalogPackage_DiscussionStringCatalogPackage.bundle in Finder, I can see the following structure

- Contents
    - Resources
        - de.lproj
            - Localizable.strings

• The Localizable.strings file has the German translations:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Hello, world!</key>
    <string>Hallo, Welt!</string>
    <key>This is a text originally written in English</key>
    <string>Dieser Text wurde ursprünglich auf Englisch verfasst.</string>
    <key>this text has a German translation in the catalog</key>
    <string>dieser Text hat eine deutsche Übersetzung im Katalog</string>
</dict>
</plist>

• For the text that doesn't have Bundle.module, Xcode shows this warning

ERROR: Hello, world! 
not found in table Localizable of bundle CFBundle 0x600002c5c000 
</Users/atacan/Library/Developer/Xcode/DerivedData/DiscussStringCatalogAppUsingPackage-djgqsvpidusfvabiivpoothnzbus/Build/Products/Debug/DiscussStringCatalogAppUsingPackage.app> 
(executable, loaded)

• The difference is that it looks at the app bundle instead of the package bundle as above, which is fine.

Scenario Two: The Swift package and the app have a string catalog

• The same result as Scenario One

Scenario Three: The Swift package and the app have a string catalog. But the app has a Text view, and its text is localized

• The text from the app is correctly shown in German
• Only the text from the package that uses Bundle.module is shown in German. The other texts are shown non-localised.

Screenshots