show fatal errors in production when mail template errors

Author: wxiaoguang

modules/templates/mailer.go

@@ -42,18 +42,20 @@ func buildSubjectBodyTemplate(stpl *texttmpl.Template, btpl *template.Template,
 		subjectContent = content[0:loc[0]]
 		bodyContent = content[loc[1]:]
 	}
-	if _, err := stpl.New(name).
-		Parse(string(subjectContent)); err != nil {
-		log.Error("Failed to parse template [%s/subject]: %v", name, err)
-		if !setting.IsProd {
-			log.Fatal("Please fix the mail template error")
+	if _, err := stpl.New(name).Parse(string(subjectContent)); err != nil {
+		// do not tolerate errors in production, but tolerate them in development (just like web templates)
+		if setting.IsProd {
+			log.Fatal("Failed to parse template [%s/subject]: %v", name, err)
+		} else {
+			log.Error("Failed to parse template [%s/subject]: %v", name, err)
 		}
 	}
-	if _, err := btpl.New(name).
-		Parse(string(bodyContent)); err != nil {
-		log.Error("Failed to parse template [%s/body]: %v", name, err)
-		if !setting.IsProd {
-			log.Fatal("Please fix the mail template error")
+	if _, err := btpl.New(name).Parse(string(bodyContent)); err != nil {
+		// do not tolerate errors in production, but tolerate them in development (just like web templates)
+		if setting.IsProd {
+			log.Fatal("Failed to parse template [%s/body]: %v", name, err)
+		} else {
+			log.Error("Failed to parse template [%s/body]: %v", name, err)
 		}
 	}
 }
@@ -64,14 +66,7 @@ func Mailer(ctx context.Context) (*texttmpl.Template, *template.Template) {
 	bodyTemplates := template.New("")
 
 	subjectTemplates.Funcs(mailSubjectTextFuncMap())
-	// To do the best to avoid serious breaking, add some functions back for body templates.
-	// Keep in mind that some behaviors have changed, for worse case, double-escaping.
-	// Custom template users should migrate to the new template system ASAP.
-	bodyTemplateFuncMap := NewFuncMap()
-	bodyTemplateFuncMap["Safe"] = SafeHTML
-	bodyTemplateFuncMap["Escape"] = HTMLEscape
-	bodyTemplateFuncMap["Str2html"] = SanitizeHTML
-	bodyTemplates.Funcs(bodyTemplateFuncMap)
+	bodyTemplates.Funcs(NewFuncMap())
 
 	assetFS := AssetFS()
 	refreshTemplates := func(firstRun bool) {