go1.20rc2 has been released but setup-go can't find it

[ncw]

Description:

I expected this to install go1.20rc2 which was released a few days ago

      - name: Install Go
        uses: actions/setup-go@v3
        with:
          go-version: '1.20-rc.2'
          check-latest: true

However it produces this error instead

Unable to find Go version '1.20-rc.2' for platform linux and architecture x64.

Action version:

v3

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:

'1.20-rc.2'

Repro steps:

See: https://github.com/rclone/rclone/actions/runs/3902313635

[dsame]

Hello @ncw , thank you for your input. The problem has been reproduced from the description. We'll investigate it

[dmitry-shibanov]

Hello @ncw. We do not upload unstable versions to the manifest that is why you can get rid of check-latest: true. Besides, could you please fix version from 1.20-rc.2 to 1.20.0-rc.2.

[ncw]

I can confirm that using 1.20.0-rc.2 was the fix - thank you.

It is confusing that the versions setup-go uses are different to the versions the go team uses.

Perhaps the versions the user provides should be matched against a regexp and come up with an error message "version not in correct format" - that would have helped me to understand the problem?

[dmitry-shibanov]

According to documentation setup-go uses SemVer notation. We have a feature request with adding native syntax.

For now I'm going to close the issue.