fix: fix empty command name (#1106)

cmd/utils.go

@@ -7,6 +7,7 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/asdine/storm"
 	"github.com/spf13/cobra"
@@ -178,3 +179,15 @@ func cleanUpMapValue(v interface{}) interface{} {
 		return v
 	}
 }
+
+// convertCmdStrToCmdArray checks if cmd string is blank (whitespace included)
+// then returns empty string array, else returns the splitted word array of cmd.
+// This is to ensure the result will never be []string{""}
+func convertCmdStrToCmdArray(cmd string) []string {
+	var cmdArray []string
+	trimmedCmdStr := strings.TrimSpace(cmd)
+	if trimmedCmdStr != "" {
+		cmdArray = strings.Split(trimmedCmdStr, " ")
+	}
+	return cmdArray
+}