From 97a569c648acf489c9fd5602cc4ecc8a012bb07b Mon Sep 17 00:00:00 2001
From: manga_osyo <manga.osyo@gmail.com>
Date: Wed, 25 Aug 2021 21:56:49 +0900
Subject: [ruby/reline] Memoize path of `.inputrc` [Ref #319]

When `ENV["HOME"] = "foo"` on irb, an exception is raised when retrieving the path of `.inputrc`.
Memoize the path of `.inputrc` and don't get the path after the second time.

https://github.com/ruby/reline/commit/7b90b16165
---
 lib/reline/config.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/reline/config.rb b/lib/reline/config.rb
index ee73143e0f..f970bccee7 100644
--- a/lib/reline/config.rb
+++ b/lib/reline/config.rb
@@ -130,8 +130,12 @@ class Reline::Config
     return home_rc_path
   end
 
+  private def default_inputrc_path
+    @default_inputrc_path ||= inputrc_path
+  end
+
   def read(file = nil)
-    file ||= inputrc_path
+    file ||= default_inputrc_path
     begin
       if file.respond_to?(:readlines)
         lines = file.readlines
-- 
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