Unable to download exact version of dotnet preview for linux runner

[mfsbo]

Description:
Linux distributions with targz extension links are not being picked up and instead tar.gz link is accessed which gives 404.

Task version:
v6

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Repro steps:
Setup of exact version "11.0.0-preview.6.26359.118" using the action

- name: Setup .NET
      uses: actions/setup-dotnet@v6
      with:
        dotnet-version: '11.0.0-preview.6.26359.118'

Expected behavior:
It should be able to download the exact version and setup.

Actual behavior:
It fails to download the verison and thus setup fails. Following is output from one the example runs

Run actions/setup-dotnet@v6
  with:
    dotnet-version: 11.0.0-preview.6.x
    cache: false
/home/runner/work/_actions/actions/setup-dotnet/v6/externals/install-dotnet.sh --skip-non-versioned-files --runtime dotnet --channel LTS
dotnet-install: Attempting to download using aka.ms link https://builds.dotnet.microsoft.com/dotnet/Runtime/10.0.11/dotnet-runtime-10.0.11-linux-x64.tar.gz
dotnet-install: Remote file https://builds.dotnet.microsoft.com/dotnet/Runtime/10.0.11/dotnet-runtime-10.0.11-linux-x64.tar.gz size is 36639275 bytes.
dotnet-install: Extracting archive from https://builds.dotnet.microsoft.com/dotnet/Runtime/10.0.11/dotnet-runtime-10.0.11-linux-x64.tar.gz
dotnet-install: Downloaded file size is 36639275 bytes.
dotnet-install: The remote and local file sizes are equal.
dotnet-install: Installed version is 10.0.11
dotnet-install: Adding to current process PATH: `/usr/share/dotnet`. Note: This change will be visible only when sourcing script.
dotnet-install: Note that the script does not resolve dependencies during installation.
dotnet-install: To check the list of dependencies, go to https://learn.microsoft.com/dotnet/core/install, select your operating system and check the "Dependencies" section.
dotnet-install: Installation finished successfully.
/home/runner/work/_actions/actions/setup-dotnet/v6/externals/install-dotnet.sh --skip-non-versioned-files --version 11.0.0-preview.6.x
dotnet-install: Attempting to download using primary link https://builds.dotnet.microsoft.com/dotnet/Sdk/11.0.0-preview.6.x/dotnet-sdk-11.0.0-preview.6.x-linux-x64.tar.gz
dotnet-install: The resource at primary link 'https://builds.dotnet.microsoft.com/dotnet/Sdk/11.0.0-preview.6.x/dotnet-sdk-11.0.0-preview.6.x-linux-x64.tar.gz' is not available.
dotnet-install: Attempting to download using primary link https://ci.dot.net/public/Sdk/11.0.0-preview.6.x/dotnet-sdk-11.0.0-preview.6.x-linux-x64.tar.gz
dotnet-install: The resource at primary link 'https://ci.dot.net/public/Sdk/11.0.0-preview.6.x/dotnet-sdk-11.0.0-preview.6.x-linux-x64.tar.gz' is not available.
dotnet_install: Error: Could not find `.NET Core SDK` with version = 11.0.0-preview.6.x
dotnet_install: Error: Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support
Error: Failed to install dotnet, exit code: 1. dotnet_install: Error: Could not find `.NET Core SDK` with version = 11.0.0-preview.6.x
dotnet_install: Error: Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support

[mfsbo]

Following is the output from exaxt version specified

Run actions/setup-dotnet@v6
  with:
    dotnet-version: 11.0.0-preview.6.26359.118
    cache: false
/home/runner/work/_actions/actions/setup-dotnet/v6/externals/install-dotnet.sh --skip-non-versioned-files --runtime dotnet --channel LTS
dotnet-install: Attempting to download using aka.ms link https://builds.dotnet.microsoft.com/dotnet/Runtime/10.0.11/dotnet-runtime-10.0.11-linux-x64.tar.gz
dotnet-install: Remote file https://builds.dotnet.microsoft.com/dotnet/Runtime/10.0.11/dotnet-runtime-10.0.11-linux-x64.tar.gz size is 36639275 bytes.
dotnet-install: Extracting archive from https://builds.dotnet.microsoft.com/dotnet/Runtime/10.0.11/dotnet-runtime-10.0.11-linux-x64.tar.gz
dotnet-install: Downloaded file size is 36639275 bytes.
dotnet-install: The remote and local file sizes are equal.
dotnet-install: Installed version is 10.0.11
dotnet-install: Adding to current process PATH: `/usr/share/dotnet`. Note: This change will be visible only when sourcing script.
dotnet-install: Note that the script does not resolve dependencies during installation.
dotnet-install: To check the list of dependencies, go to https://learn.microsoft.com/dotnet/core/install, select your operating system and check the "Dependencies" section.
dotnet-install: Installation finished successfully.
/home/runner/work/_actions/actions/setup-dotnet/v6/externals/install-dotnet.sh --skip-non-versioned-files --version 11.0.0-preview.6.26359.118
dotnet-install: Attempting to download using primary link https://builds.dotnet.microsoft.com/dotnet/Sdk/11.0.0-preview.6.26359.118/dotnet-sdk-11.0.0-preview.6.26359.118-linux-x64.tar.gz
dotnet-install: The resource at primary link 'https://builds.dotnet.microsoft.com/dotnet/Sdk/11.0.0-preview.6.26359.118/dotnet-sdk-11.0.0-preview.6.26359.118-linux-x64.tar.gz' is not available.
dotnet-install: Attempting to download using primary link https://ci.dot.net/public/Sdk/11.0.0-preview.6.26359.118/dotnet-sdk-11.0.0-preview.6.26359.118-linux-x64.tar.gz
dotnet-install: The resource at primary link 'https://ci.dot.net/public/Sdk/11.0.0-preview.6.26359.118/dotnet-sdk-11.0.0-preview.6.26359.118-linux-x64.tar.gz' is not available.
dotnet_install: Error: Could not find `.NET Core SDK` with version = 11.0.0-preview.6.26359.118
dotnet_install: Error: Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support
Error: Failed to install dotnet, exit code: 1. dotnet_install: Error: Could not find `.NET Core SDK` with version = 11.0.0-preview.6.26359.118
dotnet_install: Error: Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support

[mfsbo]

ran on windows and still same

[priyagupta108]

Hi @mfsbo,
Thanks for raising this. We’ll look into this and share feedback as soon as we have an update.

[priyagupta108]

Hi @mfsbo ,

This isn't an extension issue. In the same log the runtime downloads fine from an identical .tar.gz URL, so the link format is working. The 404 is because that SDK build doesn't exist.

11.0.0-preview.6.26359.118 is a runtime version, but setup-dotnet installs the SDK. SDKs are versioned in feature bands where the patch component starts at 100, so the matching SDK is 11.0.100-preview.6.26359.118. For more on the accepted formats, check out Supported version syntax.

Try the exact preview SDK version instead:

- uses: actions/setup-dotnet@v6
  with:
    dotnet-version: '11.0.100-preview.6.26359.118'

If you'd rather not pin an exact preview build, use the channel form with the dotnet-quality input instead:

- uses: actions/setup-dotnet@v6
  with:
    dotnet-version: '11.0'
    dotnet-quality: 'preview'

Hope this helps! Let us know if you're still running into trouble.

[priyagupta108]

Hi @mfsbo, just following up. Were you able to try 11.0.100-preview.6.26359.118? Let us know if you're still seeing the issue.

[mfsbo]

Not tried that. it seems for linux the file extension in path is different and if download is successful then fine otherwise its failing to obtain a preview version because of the file path (looks like .tar.gz vs .targz)

I will try exact preview 6 if its still needed.

[priyagupta108]

Thanks for getting back! Yes, it's worth trying, that's the actual fix.

The file extension isn't the issue here. The action doesn't build those download URLs. It hands the version off to Microsoft's dotnet-install.sh script, and that script decides the feed and the file format. So there's no .targz variant in play.

The 404 is happening at the version level, not the path level. The request goes to /dotnet/Sdk/11.0.0-preview.6.26359.118/... and there's simply no SDK published under that number, because 11.0.0 is the runtime version. The SDK for that same build is 11.0.100-preview.6.26359.118.

Here's a screenshot of a successful run on a Linux runner:

Closing this as it's a version format issue rather than a bug in the action, but please feel free to reach out if 11.0.100-preview.6.26359.118 doesn't work for you.