From f7d4a52e681cb97fefec64df9e56234cb3ba094f Mon Sep 17 00:00:00 2001
From: Alex Snast <alexsn@fb.com>
Date: Sun, 12 Jul 2020 13:52:30 +0300
Subject: [PATCH] entc: adding fail method to template engine

Signed-off-by: Alex Snast <alexsn@fb.com>
---
 entc/gen/func.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/entc/gen/func.go b/entc/gen/func.go
index c07c82918..6ad3926bb 100644
--- a/entc/gen/func.go
+++ b/entc/gen/func.go
@@ -6,6 +6,7 @@ package gen
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"path/filepath"
 	"reflect"
@@ -63,6 +64,7 @@ var (
 		"unset":         unset,
 		"hasKey":        hasKey,
 		"list":          list,
+		"fail":          fail,
 	}
 	rules    = ruleset()
 	acronyms = make(map[string]struct{})
@@ -431,3 +433,8 @@ func hasKey(d map[string]interface{}, key string) bool {
 func list(v ...interface{}) []interface{} {
 	return v
 }
+
+// fail unconditionally returns an empty string and an error with the specified text.
+func fail(msg string) (string, error) {
+	return "", errors.New(msg)
+}