From 35f2f7a69e9fd5b505935b89cb7861a47ba85f4d Mon Sep 17 00:00:00 2001
From: Mike Dalessio <mike.dalessio@gmail.com>
Date: Tue, 3 Aug 2021 17:34:45 -0400
Subject: [PATCH] ext: load C extension files from non-native gems via
 "require"

and not "require relative"

Fixes #2300
---
 lib/nokogiri/extension.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/nokogiri/extension.rb b/lib/nokogiri/extension.rb
index 73d9269b24..a7e8ca8637 100644
--- a/lib/nokogiri/extension.rb
+++ b/lib/nokogiri/extension.rb
@@ -2,6 +2,7 @@
 
 # load the C or Java extension
 begin
+  # native precompiled gems package shared libraries in <gem_dir>/lib/nokogiri/<ruby_version>
   ::RUBY_VERSION =~ /(\d+\.\d+)/
   require_relative "#{Regexp.last_match(1)}/nokogiri"
 rescue LoadError => e
@@ -22,5 +23,9 @@
     EOM
     raise e
   end
-  require_relative "nokogiri"
+
+  # use "require" instead of "require_relative" because non-native gems will place C extension files
+  # in Gem::BasicSpecification#extension_dir after compilation (during normal installation), which
+  # is in $LOAD_PATH but not necessarily relative to this file (see #2300)
+  require "nokogiri/nokogiri"
 end