From 58240bdc3d8e5a31b5bc55ff6a07a618a1e5d77a Mon Sep 17 00:00:00 2001
From: morganamilo <morganamilo@gmail.com>
Date: Thu, 2 Aug 2018 16:05:43 +0100
Subject: [PATCH] Steal multierror from aurlib

---
 utils.go | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/utils.go b/utils.go
index c9e9017e..3762dd56 100644
--- a/utils.go
+++ b/utils.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"sync"
 	"unicode"
 )
 
@@ -128,3 +129,36 @@ func removeInvalidTargets(targets []string) []string {
 
 	return filteredTargets
 }
+
+type MultiError struct {
+	Errors []error
+	mux    sync.Mutex
+}
+
+func (err *MultiError) Error() string {
+	str := ""
+
+	for _, e := range err.Errors {
+		str += e.Error()
+	}
+
+	return str
+}
+
+func (err *MultiError) Add(e error) {
+	if e == nil {
+		return
+	}
+
+	err.mux.Lock()
+	err.Errors = append(err.Errors, e)
+	err.mux.Unlock()
+}
+
+func (err *MultiError) Return() error {
+	if len(err.Errors) > 0 {
+		return err
+	}
+
+	return nil
+}