check if have all and other platforms set in the --platform flag

Signed-off-by: cpanato <ctadeu@gmail.com>

pkg/commands/options/validate.go

@@ -15,6 +15,7 @@
 package options
 
 import (
+	"errors"
 	"log"
 	"strings"
 )
@@ -39,6 +40,14 @@ The --local flag might be deprecated in the future.
 -----------------------------------------------------------------
 `
 
+const platformsFlagWarning = `ERROR!
+-----------------------------------------------------------------------
+The --platform was set with all and other specific platforms.
+
+Please choose either all or a specific one, ie. --platform=linux/arm64
+-----------------------------------------------------------------------
+`
+
 func Validate(po *PublishOptions, bo *BuildOptions) error {
 	if po.Bare && po.BaseImportPaths {
 		log.Print(bareBaseFlagsWarning)
@@ -49,5 +58,20 @@ func Validate(po *PublishOptions, bo *BuildOptions) error {
 		log.Print(localFlagsWarning)
 	}
 
+	if len(bo.Platforms) > 1 {
+		hasAll := false
+
+		for _, platform := range bo.Platforms {
+			if platform == "all" {
+				hasAll = true
+			}
+		}
+
+		if hasAll {
+			log.Print(platformsFlagWarning)
+			return errors.New("all or specific platforms should be used")
+		}
+	}
+
 	return nil
 }