Error: Unknown option '--language'

[kcieplak]

Is it reproducible with SwiftPM command-line tools: swift build, swift test, swift package etc?

• Confirmed reproduction steps with SwiftPM CLI. The description text must include reproduction steps with either of command-line SwiftPM commands, swift build, swift test, swift package etc.

Description

https://github.com/StanfordSpezi/SpeziViews.git
MacOS

swift build `--buildsystem=swiftbuild` fails to build package

info: Generate symbols for Localizable.xcstrings
    cd /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/SpeziFoundation
    /Applications/Xcode.app/Contents/Developer/usr/bin/xcstringstool generate-symbols --language swift --output-directory /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/arm64-apple-macosx/Intermediates.noindex/SpeziFoundation.build/Debug/SpeziFoundation.build/DerivedSources /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/SpeziFoundation/Sources/SpeziFoundation/Resources/Localizable.xcstrings
info: Discovering Swift tasks after 'Compiling Counter.swift'
info: Error: Unknown option '--language'
Usage: xcstringstool <subcommand>
  See 'xcstringstool --help' for more information.
error: GenerateStringSymbols /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/arm64-apple-macosx/Intermediates.noindex/SpeziFoundation.build/Debug/SpeziFoundation.build/DerivedSources/GeneratedStringSymbols_Localizable.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/SpeziFoundation/Sources/SpeziFoundation/Resources/Localizable.xcstrings failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageModel.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ NetworkImageModel.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageModel.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImage.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ NetworkImage.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImage.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageState.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ NetworkImageState.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageState.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/Deprecations.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ Deprecations.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/Deprecations.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageLoader.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ NetworkImageLoader.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageLoader.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/ImageSource.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ ImageSource.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/ImageSource.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageCache.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ NetworkImageCache.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/NetworkImageCache.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/TaskModifier.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ TaskModifier.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/TaskModifier.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/View+NetworkImageLoader.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ View+NetworkImageLoader.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/View+NetworkImageLoader.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/URLSession+NetworkImage.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ URLSession+NetworkImage.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/NetworkImage/Sources/NetworkImage/URLSession+NetworkImage.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/XCTRuntimeAssertions/Sources/RuntimeAssertions/RuntimeAssertion.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ RuntimeAssertion.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/XCTRuntimeAssertions/Sources/RuntimeAssertions/RuntimeAssertion.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/XCTRuntimeAssertions/Sources/RuntimeAssertions/RuntimeAssertionInjection.swift failed with a nonzero exit code
error: SwiftCompile normal arm64 Compiling\ RuntimeAssertionInjection.swift /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/355D1B7C-5D10-4581-B943-C3EEBBE0B949/SpeziViews/.build-swiftbuild/checkouts/XCTRuntimeAssertions/Sources/RuntimeAssertions/RuntimeAssertionInjection.swift failed with a nonzero exit code
error: EmitSwiftModule normal arm64 failed with a nonzero exit code
error: SwiftEmitModule normal arm64 Emitting\ module\ for\ NetworkImage failed with a nonzero exit code
error: Build failed

Expected behavior

Builds

Actual behavior

Fails to build

Steps to reproduce

git clone https://github.com/StanfordSpezi/SpeziViews.git
swift build --build-system=swiftbuild

Swift Package Manager version/commit hash

No response

Swift & OS version (output of swift --version ; uname -a)

No response

[bkhouri]

I'm unable to reproduce this failure in the following environment:

Host OS:

• macOS 26

  ❯ uname -a
  Darwin BKs-Work-MBP-M4-Pro.local 25.1.0 Darwin Kernel Version 25.1.0: Mon Sep  8 21:17:17 PDT 2025; root:xnu_development-12377.40.77.505.1~2/DEVELOPMENT_ARM64_T6041 arm64
  

• Swift 6.2 OSS Toolchain

  ❯ swift --version
  Apple Swift version 6.2 (swift-6.2-RELEASE)
  Target: arm64-apple-macosx26.0
  Build config: +assertions
  

• SwiftPM branch main at commit ID 3cdae8e1c823666739174305cba389e99dffda30

❯ cd <swiftpm-repo>
❯ mkdir External
❯ (cd External && git clone https://github.com/StanfordSpezi/SpeziViews.git)
❯ swift run swift-build --package-path External/SpeziViews --build-system swiftbuild

@kcieplak : is this still an issue?

[kcieplak]

Might be fixed now with #9140

[kcieplak]

@bkhouri

This is still a problem. It has to do with the xcstringstool being called.

    cd /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics/spi-workdir/AF55BFCA-2381-4AE8-B83A-38D0A0A2FB5A/PDFPagePicker
    /Applications/Xcode.app/Contents/Developer/usr/bin/xcstringstool generate-symbols --language swift --output-directory /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics/spi-workdir/AF55BFCA-2381-4AE8-B83A-38D0A0A2FB5A/PDFPagePicker/.build-swiftbuild/arm64-apple-macosx/Intermediates.noindex/PDFPagePicker.build/Debug/PDFPagePicker.build/DerivedSources /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics/spi-workdir/AF55BFCA-2381-4AE8-B83A-38D0A0A2FB5A/PDFPagePicker/Sources/PDFPagePicker/Resources/Localizable.xcstrings
info: Compile XCStrings Localizable.xcstrings

SPM/swiftbuild should not be calling xcstringstool at all as this is part of the XCode toolchain.

You are not seeing the error as your Xcode version installed has a xcstringstool that supports the --language option.

Something will need to be done to skip processing localization files i.e xcstrings