osversion_darwin.go

// SPDX-FileCopyrightText: Copyright The Lima Authors
// SPDX-License-Identifier: Apache-2.0

package osutil

import (
	"fmt"
	"os/exec"
	"strings"
	"sync"

	"github.com/coreos/go-semver/semver"
)

// ProductVersion returns the macOS product version like "12.3.1".
var ProductVersion = sync.OnceValues(func() (*semver.Version, error) {
	cmd := exec.Command("sw_vers", "-productVersion")
	// output is like "12.3.1\n"
	b, err := cmd.Output()
	if err != nil {
		return nil, fmt.Errorf("failed to execute %v: %w", cmd.Args, err)
	}
	verTrimmed := strings.TrimSpace(string(b))
	// macOS 12.4 returns just "12.4\n"
	for strings.Count(verTrimmed, ".") < 2 {
		verTrimmed += ".0"
	}
	verSem, err := semver.NewVersion(verTrimmed)
	if err != nil {
		return nil, fmt.Errorf("failed to parse macOS version %q: %w", verTrimmed, err)
	}
	return verSem, nil
})