feat: Add --new-tag flag to override tag for immutable registries (#15)

Fixes #14

Author: smoehrle

handler.go

@@ -37,7 +37,7 @@ const (
 	artifactsDbName    = "artifacts.db"
 )
 
-func indexAndPush(ctx context.Context, repo string, tag string, registryUrl string, authToken string) (string, error) {
+func indexAndPush(ctx context.Context, repo string, tag string, newTag string, registryUrl string, authToken string) (string, error) {
 	ctx = context.WithValue(ctx, "RegistryURL", registryUrl)
 
 	registry, err := registryutils.Init(ctx, registryUrl, authToken)
@@ -86,7 +86,7 @@ func indexAndPush(ctx context.Context, repo string, tag string, registryUrl stri
 		}
 		ctx = context.WithValue(ctx, "SOCIIndexDigest", indexDescriptor.Digest.String())
 
-		err = registry.Push(ctx, sociStore, *indexDescriptor, repo, tag)
+		err = registry.Push(ctx, sociStore, *indexDescriptor, repo, newTag)
 		if err != nil {
 			return logAndReturnError(ctx, PushFailedMessage, err)
 		}

main.go

@@ -20,7 +20,8 @@ var (
 )
 
 var (
-	auth string
+	auth   string
+	newTag string
 )
 
 func parseImageDesc(desc string) (repo, tag, registry string, err error) {
@@ -61,16 +62,21 @@ func main() {
 				os.Exit(1)
 			}
 
-			log.Info(ctx, fmt.Sprintf("Indexing and pushing %s:%s to %s", repo, tag, registry))
+			if newTag == "" {
+				newTag = tag
+			}
+
+			log.Info(ctx, fmt.Sprintf("Indexing %s:%s and pushing with tag %s to %s", repo, tag, newTag, registry))
 
-			_, err = indexAndPush(ctx, repo, tag, registry, auth)
+			_, err = indexAndPush(ctx, repo, tag, newTag, registry, auth)
 			if err != nil {
 				os.Exit(1)
 			}
 		},
 	}
 
 	rootCmd.Flags().StringVarP(&auth, "auth", "a", "", "Registry authentication token (usually USER:PASSWORD)")
+	rootCmd.Flags().StringVarP(&newTag, "new-tag", "t", "", "Push indexed image with this tag")
 
 	if err := rootCmd.Execute(); err != nil {
 		_, _ = fmt.Fprintln(os.Stderr, err)