Enhancement: check the windows version meets the minimum requirement …

…(launcher)

launcher/internal/cmd/root.go

@@ -70,6 +70,11 @@ var (
 				_ = lock.Unlock()
 				os.Exit(errorCode)
 			}()
+			if err := cmdUtils.CheckVersion(); err != nil {
+				fmt.Println(err)
+				errorCode = internal.ErrUnsupportedOS
+				return
+			}
 			canTrustCertificate := viper.GetString("Config.CanTrustCertificate")
 			if runtime.GOOS != "windows" {
 				canTrustCertificateValues.Remove("user")

launcher/internal/cmdUtils/version_other.go

@@ -0,0 +1,7 @@
+//go:build !windows
+
+package cmdUtils
+
+func CheckVersion() error {
+	return nil
+}

launcher/internal/cmdUtils/version_windows.go

@@ -0,0 +1,34 @@
+package cmdUtils
+
+import (
+	"fmt"
+	"golang.org/x/sys/windows"
+)
+
+const minMajorVersion = 10
+const minMinorVersion = 0
+const minBuildNumber = 17763
+const alias = "Windows 10 (1809 - Redstone 5)"
+
+func CheckVersion() error {
+	major, minor, build := windows.RtlGetNtVersionNumbers()
+	if major > minMajorVersion {
+		return nil
+	}
+	if major == minMajorVersion && minor > minMinorVersion {
+		return nil
+	}
+	if major == minMajorVersion && minor == minMinorVersion && build >= minBuildNumber {
+		return nil
+	}
+	return fmt.Errorf(
+		"unsupported Windows version: %d.%d.%d, minimum is %d.%d.%d also known as %s. Update your system",
+		major,
+		minor,
+		build,
+		minMajorVersion,
+		minMinorVersion,
+		minBuildNumber,
+		alias,
+	)
+}

launcher/internal/errors.go

@@ -39,4 +39,5 @@ const (
 	ErrConfigCDNMap
 	ErrSteamRoot
 	ErrAnnouncementMulticastGroup
+	ErrUnsupportedOS
 )