The RC version in the go.mod file cannot be retrieved

[sonatard]

Description:

RC is not included in the scope of the regular expression

setup-go/src/installer.ts

Line 467 in 3041bf5

const match = contents.match(/^go (\d+(\.\d+)*)/m);

Action version:
Specify the action version

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:
Go 1.24rc1

Repro steps:

// go.mod
go 1.24rc1

    - uses: actions/setup-go@v5
      with:
        go-version-file: ./go.mod
        cache: false

Expected behavior:

Setup go version spec 1.24rc1
Attempting to download 1.24rc1...
matching 1.24rc1...

Actual behavior:

Setup go version spec 1.24
Attempting to download 1.24...
matching 1.24...

[mahalakshmi-rekadi]

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

[priyagupta108]

Hi @sonatard,
Thank you for bringing this issue to our attention. After analyzing the issue, we have confirmed that the regular expression does not include RC versions, causing the Go version specified in go.mod to be improperly matched.
To mitigate this, you can specify pre-release versions using the go-version input within the setup-go action.

We will investigate this further and explore the possibility of incorporating support for RC versions in the go.mod file.

We will consider this as a potential feature request for future improvements. In the meantime, please feel free to share any further insights or suggestions you may have.

[erikdubbelboer]

Using go-version: "1.24rc2" as input also fails with:

Setup go version spec 1.24rc2
Attempting to download 1.24rc2...
matching 1.24rc2...
Not found in manifest.  Falling back to download directly from Go
Error: Unable to find Go version '1.24rc2' for platform linux and architecture x64.

EDIT: My bad, it needs to be go-version: "1.24.0-rc.2".