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https://github.com/tailscale/tailscale.git
synced 2026-09-13 06:19:11 -04:00
Brad Fitzpatrick
c3736ae41a
The golang:N-alpine Docker image lags behind Go minor releases by a day or two. When we bump go.mod to a new minor version before the image catches up, the required "Build Docker image" CI check fails with "go.mod requires go >= 1.27.1 (running go 1.27.0; GOTOOLCHAIN=local)" and blocks the toolchain bump from merging. Instead, base the build stage on plain alpine and download the Tailscale Go toolchain release for the revision in go.toolchain.rev, matching how everything else in this repo is built. Fixes #21072 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: I1ccb77fa3c7a49532ea87dbdbf9e3340880ec94e
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
// Copyright (c) Tailscale Inc & contributors
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// SPDX-License-Identifier: BSD-3-Clause
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package tailscaleroot
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import (
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"os"
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"os/exec"
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"runtime"
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"strings"
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"testing"
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"golang.org/x/mod/modfile"
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)
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// TestGoVersion tests that the Go version specified in go.mod matches ./tool/go version.
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func TestGoVersion(t *testing.T) {
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// We could special-case ./tool/go path for Windows, but really there is no
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// need to run it there.
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if runtime.GOOS == "windows" {
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t.Skip("Skipping test on Windows")
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}
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goModVersion := mustGetGoModVersion(t)
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goToolCmd := exec.Command("./tool/go", "version")
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goToolOutput, err := goToolCmd.Output()
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if err != nil {
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t.Fatalf("Failed to get ./tool/go version: %v", err)
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}
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// Version info will approximately look like 'go version go1.24.4 linux/amd64'.
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parts := strings.Fields(string(goToolOutput))
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if len(parts) < 4 {
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t.Fatalf("Unexpected ./tool/go version output format: %s", goToolOutput)
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}
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goToolVersion := strings.TrimPrefix(parts[2], "go")
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if goModVersion != goToolVersion {
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t.Errorf("Go version in go.mod (%q) does not match the version of ./tool/go (%q).\nEnsure that the go.mod refers to the same Go version as ./go.toolchain.rev.",
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goModVersion, goToolVersion)
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}
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}
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func mustGetGoModVersion(t *testing.T) string {
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t.Helper()
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goModBytes, err := os.ReadFile("go.mod")
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if err != nil {
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t.Fatal(err)
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}
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modFile, err := modfile.Parse("go.mod", goModBytes, nil)
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if err != nil {
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t.Fatal(err)
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}
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if modFile.Go == nil {
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t.Fatal("no Go version found in go.mod")
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}
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return modFile.Go.Version
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}
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