From 501c237f5072a55c38f70ed19db9f6b93b3d6c25 Mon Sep 17 00:00:00 2001
From: buty4649 <buty4649@gmail.com>
Date: Fri, 25 Jul 2025 14:24:37 +0900
Subject: [PATCH] improve: prioritize local build_config.rb over default
 configuration

Add fallback to check for ./build_config.rb before using default.rb
---
 lib/mruby/build.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/mruby/build.rb b/lib/mruby/build.rb
index 9af24162b..3d0f8ecfd 100644
--- a/lib/mruby/build.rb
+++ b/lib/mruby/build.rb
@@ -60,7 +60,11 @@ module MRuby
       def mruby_config_path
         path = ENV['MRUBY_CONFIG'] || ENV['CONFIG']
         if path.nil? || path.empty?
-          path = "#{MRUBY_ROOT}/build_config/default.rb"
+          if File.file?("./build_config.rb")
+            path = "./build_config.rb"
+          else
+            path = "#{MRUBY_ROOT}/build_config/default.rb"
+          end
         elsif !File.file?(path) && !Pathname.new(path).absolute?
           f = "#{MRUBY_ROOT}/build_config/#{path}.rb"
           path = File.exist?(f) ? f : File.extname(path).empty? ? f : path