use errors.As in case in the future the err coming from PlatformUpgrade might be wrapped

errors.As search through all the wrapped error for our target type, in case it finds it then it popolate that struct but more important we can use it as a type assertion even if is nested through many errors

Author: alessio-perugini

internal/cli/core/upgrade.go

@@ -17,6 +17,7 @@ package core
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"os"
 
@@ -109,7 +110,8 @@ func Upgrade(inst *rpc.Instance, args []string, skipPostInstall bool) {
 		response, err := core.PlatformUpgrade(context.Background(), r, feedback.ProgressBar(), feedback.TaskProgress())
 		warningMissingIndex(response)
 		if err != nil {
-			if _, ok := err.(*arduino.PlatformAlreadyAtTheLatestVersionError); ok {
+			var alreadyAtLatestVersionErr *arduino.PlatformAlreadyAtTheLatestVersionError
+			if errors.As(err, &alreadyAtLatestVersionErr) {
 				feedback.Warning(err.Error())
 				continue
 			}