From ef80643eb22daab37c74137bea265607d572f78f Mon Sep 17 00:00:00 2001
From: tison <wander4096@gmail.com>
Date: Wed, 24 Aug 2022 11:14:34 +0800
Subject: [PATCH] Auto capitalize enums name in Ruby

This closes #1965.
---
 ruby/ext/google/protobuf_c/message.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/ruby/ext/google/protobuf_c/message.c b/ruby/ext/google/protobuf_c/message.c
index b11878545f039..d0481673252c2 100644
--- a/ruby/ext/google/protobuf_c/message.c
+++ b/ruby/ext/google/protobuf_c/message.c
@@ -1263,13 +1263,17 @@ VALUE build_module_from_enumdesc(VALUE _enumdesc) {
   int n = upb_EnumDef_ValueCount(e);
   for (int i = 0; i < n; i++) {
     const upb_EnumValueDef* ev = upb_EnumDef_Value(e, i);
-    const char* name = upb_EnumValueDef_Name(ev);
+    char* name = upb_EnumValueDef_Name(ev);
     int32_t value = upb_EnumValueDef_Number(ev);
     if (name[0] < 'A' || name[0] > 'Z') {
-      rb_warn(
+      if (name[0] >= 'a' && name[0] <= 'z') {
+        name[0] -= 32; // auto capitalize
+      } else {
+        rb_warn(
           "Enum value '%s' does not start with an uppercase letter "
           "as is required for Ruby constants.",
           name);
+      }
     }
     rb_define_const(mod, name, INT2NUM(value));
   }