[Bug]: swift-autolink-extract not found when using musl sdk to build flavor of Swift binary

[commjoen]

• [ x ] I have gone through the action README, documentation and wiki.
• [ x ] I don't see my issue listed in existing issues.

Describe the bug
Thank you for your awesome Github Action! I am using it to create various flavors of a Swift cli application for my project. However, when I try to use the github action its output to use the musl sdk for Swift, I end up with an issue: error: unableToFind(tool: "swift-autolink-extract") (See https://github.com/OWASP/wrongsecrets-binaries/actions/runs/13632105326/job/38101958085?pr=50#step:6:16).
What am I dong wrong here? Can you please help?

To Reproduce
Steps to reproduce the behavior:

1. Choose runner macos-latest
2. Provide action input:

build-musl:
    name: Swift with Musl
    runs-on: macos-latest
    steps:
      - uses: SwiftyLab/setup-swift@v1.9.1
        with:
          swift-version: "6.0.3"
      - uses: actions/checkout@v4
      - name: Get swift version
        run: swift --version
      - name: Install Swift Musl SDK
        run: |
          swift sdk install https://download.swift.org/swift-6.0.3-release/static-sdk/swift-6.0.3-RELEASE/swift-6.0.3-RELEASE_static-linux-0.0.1.artifactbundle.tar.gz --checksum 67f765e0030e661a7450f7e4877cfe008db4f57f177d5a08a6e26fd661cdd0bd
          export PATH=$PATH:$(find /Library/Developer -type d -maxdepth 1 | paste -sd ":" -)
      - name: Build and test a Swift package
        run: |
          cd swift 
          # echo "ls /Library/Developer/Toolchains/swift-6.0.3-RELEASE.xctoolchain/usr/bin does not work: we need to install the sdk toolcahin?"
          export PATH=$PATH:$(find /Library/Developer -type d -maxdepth 1 | paste -sd ":" -)
          swift build -c release --swift-sdk x86_64-swift-linux-musl --static-swift-stdlib
          swift build -c release --swift-sdk aarch64-swift-linux-musl --static-swift-stdlib
      - name: Uploading linux arm musl Swift executable 
        uses: actions/upload-artifact@v4
        with:
          name: wrongsecrets-swift-linux-musl-arm
          path: swift/.build/aarch64-unknown-linux-gnu/release/swift
      - name: Uploading linux x86 musl Swift executable 
        uses: actions/upload-artifact@v4
        with:
          name: wrongsecrets-swift-linux-musl
          path: swift/.build/x86_64-unknown-linux-gnu/release/swift

3. Run action with environment variables: no others than the default, see https://github.com/OWASP/wrongsecrets-binaries/pull/50/files#diff-6676f16935e8d9df6c03d0bdad8227528192340c02fe1aef2b69f9c6c5613991 1.
4. See error:

Building for production...
[0/4] Write sources
[1/4] Write swift-version-4657CCE4B953477C.txt
[3/5] Compiling swift main.swift
[3/5] Write Objects.LinkFileList
error: unableToFind(tool: "swift-autolink-extract")
[4/5] Linking swift
Error: Process completed with exit code 1.

Expected behavior
The swift-autolink-extract should be on $PATH and executed.

Logs
Action run log, either link to action run or log file: a run can be found at https://github.com/OWASP/wrongsecrets-binaries/actions/runs/13632105326/job/38101958085?pr=50#step:6:16

Runner (please complete the following information):

• Name: macos-latest
• OS: macOS
• Version 15

Additional context
As you can see: the building and releasing of the other Swift flavors just works fine. Thank you for your awesome Github action!

[soumyamahunt]

@commjoen for macOS, instead of running swift commands directly, can you try the following format:

xcrun --toolchain ${{ env.TOOLCHAINS }} swift --version

[commjoen]

@soumyamahunt is that the way to install the sdk as well :) ? will try it out :D

[commjoen]

That does not work unfortunately: see OWASP/wrongsecrets-binaries#64 .
My workaround is to do brew install swift and then export the binaries to the path, but it would be awesome if that would no longer be required. Can you help me please?

[soumyamahunt]

@commjoen on going through the installation docs, I see:

You cannot use the toolchain provided with Xcode to build programs using the SDK.

Currently this action uses Xcode integrated toolchain which could be the reason you are having this issue. Support needs to be added to ignore Xcode integrated toolchain.

[soumyamahunt]

@commjoen can you try the above branch passing, prefer-oss-toolchain as true?
Also, another alternative is to use a macOS runner that doesn't have Xcode 16.2 installed which includes Swift 6.0.3, i.e. macos-13

[commjoen]

@soumyamahunt would love to test that! How do i set prefer-oss-toolchain?

[soumyamahunt]

@soumyamahunt would love to test that! How do i set prefer-oss-toolchain?

It would be in the same level as swift-version, to test you can change your setup step to this:

- uses: SwiftyLab/setup-swift@swift-sdk
  with:
    swift-version: "6.0.3"
    prefer-oss-toolchain: true

[commjoen]

Tested it and resulted in

• https://github.com/OWASP/wrongsecrets-binaries/actions/runs/13850799005/job/38757621168?pr=64 and
• https://github.com/OWASP/wrongsecrets-binaries/actions/runs/13852157818/job/38761213895?pr=64 (using main /latest) resulting in error: unableToFind(tool: "swift-autolink-extract") .

In my own main branch i could only resolve it by doing brew install swift

[soumyamahunt]

Tested it and resulted in

• https://github.com/OWASP/wrongsecrets-binaries/actions/runs/13850799005/job/38757621168?pr=64 and
• https://github.com/OWASP/wrongsecrets-binaries/actions/runs/13852157818/job/38761213895?pr=64 (using main /latest) resulting in error: unableToFind(tool: "swift-autolink-extract") .

In my own main branch i could only resolve it by doing brew install swift

The new prefer-oss-toolchain option isn't released or merged, you can use the branch name to test using the syntax descibed here: #369 (comment)