my computer will still die soon

helper/helper.go

@@ -11,3 +11,13 @@ func JoinAsError(msg []string) error {
 	}
 	return nil
 }
+
+func JoinErrors(errs []error) error {
+	msgs := make([]string, 0, len(errs))
+	for _, err := range errs {
+		if err != nil {
+			msgs = append(msgs, err.Error())
+		}
+	}
+	return JoinAsError(msgs)
+}

helper/helper_test.go

@@ -1,6 +1,7 @@
 package helper
 
 import (
+	"errors"
 	"testing"
 )
 
@@ -19,3 +20,19 @@ func TestJoinAsError(t *testing.T) {
 		t.Error("bad error")
 	}
 }
+
+func TestJoinErrors(t *testing.T) {
+	var errs []error = nil
+	if JoinErrors(errs) != nil {
+		t.Error("expected no errors")
+	}
+	errs = make([]error, 0)
+	if JoinErrors(errs) != nil {
+		t.Error("expected no errors")
+	}
+
+	errs = []error{errors.New("a"), errors.New("b")}
+	if JoinErrors(errs).Error() != "a\nb" {
+		t.Error("bad error")
+	}
+}