*: avoid using default wmi client. (#1590)

pkg/winversion/main.go

@@ -5,43 +5,39 @@ package winversion
 import (
 	"fmt"
 	"strconv"
+	"sync"
 
 	"golang.org/x/sys/windows/registry"
 )
 
-var (
-	WindowsVersion      string
-	WindowsVersionFloat float64
-)
-
-//nolint:gochecknoinits
-func init() {
-	var err error
-	WindowsVersion, WindowsVersionFloat, err = GetWindowsVersion()
+var WindowsVersionFloat = sync.OnceValue[float64](func() float64 {
+	version, err := getWindowsVersion()
 	if err != nil {
 		panic(err)
 	}
-}
+
+	return version
+})
 
 // GetWindowsVersion reads the version number of the OS from the Registry
 // See https://docs.microsoft.com/en-us/windows/desktop/sysinfo/operating-system-version
-func GetWindowsVersion() (string, float64, error) {
+func getWindowsVersion() (float64, error) {
 	reg, err := registry.OpenKey(registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Windows NT\CurrentVersion`, registry.QUERY_VALUE)
 	if err != nil {
-		return "", 0, fmt.Errorf("couldn't open registry: %w", err)
+		return 0, fmt.Errorf("couldn't open registry: %w", err)
 	}
 
 	defer reg.Close()
 
 	windowsVersion, _, err := reg.GetStringValue("CurrentVersion")
 	if err != nil {
-		return "", 0, fmt.Errorf("couldn't open registry: %w", err)
+		return 0, fmt.Errorf("couldn't open registry: %w", err)
 	}
 
 	windowsVersionFloat, err := strconv.ParseFloat(windowsVersion, 64)
 	if err != nil {
-		return "", 0, fmt.Errorf("couldn't open registry: %w", err)
+		return 0, fmt.Errorf("couldn't open registry: %w", err)
 	}
 
-	return windowsVersion, windowsVersionFloat, nil
+	return windowsVersionFloat, nil
 }