Action pulls the wrong package on little-endian powerpc

[lengau]

Description:
When running on a little-endian PowerPC runner, the action pulls the binary for big-endian PowerPC.

Action version:
v6.0.0

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:

>=1.170 pulling 1.25

Repro steps:
A description with steps to reproduce the issue. If your have a public example or repo to share, please provide the link.
https://github.com/canonical/chisel-releases/blob/9559e9de595029e5d7ceb2197155721ab5bf6a2b/.github/workflows/spread.yaml#L48-L50

Expected behavior:
It downloads the little-endian file from https://storage.googleapis.com/golang/go1.25.1.linux-ppc64le.tar.gz

Actual behavior:
It downloads the big-endian file from https://storage.googleapis.com/golang/go1.25.1.linux-ppc64.tar.gz

[lengau]

Ignoring the malware bot, it looks like the core change needed is in getArch, which should receive an endianness value (that you can get from os.endianness) and return ppc64le if the architecture is "ppc64" and the endianness is "LE".

[mahabaleshwars]

Hi @lengau,
Thank you for creating this issue. We will investigate it and provide feedback as soon as we have some updates.

[gowridurgad]

Hi @lengau, Thanks for reporting this issue.
At this time, the GitHub Actions runner environment does not provide native support for little-endian PowerPC (ppc64le). As a result, the setup-go action attempts to download the big-endian (ppc64) binary when it detects a PowerPC architecture, which unfortunately leads to incorrect behaviour on ppc64le systems. This limitation is noted in the code here.

You can refer to the following documentation to check the currently supported architectures for GitHub-hosted and self-hosted runners:

• GitHub-hosted runners.
• Self-hosted runners.

We understand this is not ideal and will consider adding proper support for ppc64le as a future enhancement.

[gowridurgad]

Hi @lengau, Just a gentle reminder regarding this issue, If you have any updates or need further assistance, Please let us know.

[gowridurgad]

Hi @lengau, Just a gentle reminder regarding this issue, If you have any updates or need further assistance, Please let us know.

[lengau]

I don't know what is expected of me here. Support for little-endian powerpc would be preferred, but if that's not doable, the action should error out appropriately rather than appearing to succeed but providing unusable go binaries.