mirror: fix user may clone wrong component version

pkg/repository/clone_mirror.go

@@ -419,19 +419,20 @@ func checkVersion(options CloneOptions, versions set.StringSet, version string)
 
 func combineVersions(versions *[]string,
 	manifest *v1manifest.Component, oss, archs,
-	selectedVersions []string) set.StringSet {
-	if (versions == nil || len(*versions) < 1) && len(selectedVersions) < 1 {
+	globalVersions []string) set.StringSet {
+	if (versions == nil || len(*versions) < 1) && len(globalVersions) < 1 {
 		return nil
 	}
 
-	result := set.NewStringSet()
 	if versions != nil && len(*versions) > 0 {
-		result = set.NewStringSet(*versions...)
+		// The version specified by the user has the highest priority
+		return set.NewStringSet(*versions...)
 	}
 
 	// Some components version binding to TiDB
+	// Users should specify the specific component version. "coreSuits" just remain for compatibility
 	coreSuites := set.NewStringSet("tidb", "tikv", "pd", "tiflash", "prometheus", "grafana", "ctl", "cdc")
-
+	result := set.NewStringSet()
 	for _, os := range oss {
 		for _, arch := range archs {
 			platform := PlatformString(os, arch)
@@ -448,7 +449,7 @@ func combineVersions(versions *[]string,
 				}
 			}
 
-			for _, selectedVersion := range selectedVersions {
+			for _, selectedVersion := range globalVersions {
 				if selectedVersion == utils.NightlyVersionAlias {
 					selectedVersion = manifest.Nightly
 				}