https://git.ruby-lang.org/ruby.git/commit/?id=90913bfabe

From 90913bfabe427993e82d4a72616739ee49e61a5d Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Sat, 21 Mar 2020 18:13:50 +0900
Subject: [ruby/reline] Suppress error in case INPUTRC env is empty

https://github.com/ruby/reline/commit/bce7e7562b

diff --git a/lib/reline/config.rb b/lib/reline/config.rb
index 61708f9..53b868f 100644
--- a/lib/reline/config.rb
+++ b/lib/reline/config.rb
@@ -83,8 +83,17 @@ class Reline::Config https://github.com/ruby/ruby/blob/trunk/lib/reline/config.rb#L83
     @key_actors[@keymap_label]
   end
 
+  def inputrc_path
+    case ENV['INPUTRC']
+    when nil, ''
+      DEFAULT_PATH
+    else
+      ENV['INPUTRC']
+    end
+  end
+
   def read(file = nil)
-    file ||= File.expand_path(ENV['INPUTRC'] || DEFAULT_PATH)
+    file ||= File.expand_path(inputrc_path)
     begin
       if file.respond_to?(:readlines)
         lines = file.readlines
diff --git a/test/reline/test_config.rb b/test/reline/test_config.rb
index 14342ff..cecb364 100644
--- a/test/reline/test_config.rb
+++ b/test/reline/test_config.rb
@@ -206,4 +206,13 @@ class Reline::Config::Test < Reline::TestCase https://github.com/ruby/ruby/blob/trunk/test/reline/test_config.rb#L206
     history << "a\n"
     assert_equal 1, history.size
   end
+
+  def test_empty_inputrc_env
+    inputrc_backup = ENV['INPUTRC']
+    ENV['INPUTRC'] = ''
+    assert_nothing_raised do
+      @config.read
+    end
+    ENV['INPUTRC'] = inputrc_backup
+  end
 end
-- 
cgit v0.10.2


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