https://git.ruby-lang.org/ruby.git/commit/?id=7d211c93af

From 7d211c93af2253c5f5a4eb988a362f3220965980 Mon Sep 17 00:00:00 2001
From: st0012 <stan001212@g...>
Date: Tue, 28 Jun 2022 14:47:28 +0100
Subject: [ruby/irb] Color.colorable? needs to consider the condition when irb
 is not loaded

ruby/debug uses `irb/color` selectively:
https://github.com/ruby/debug/blob/0ac22406bb8f65bc76f9f5576a00c729cac693af/lib/debug/color.rb#L4

And in that case, `IRB.conf` won't be defined. So Color.colorable? needs
to consider that.

This also fixes the Ruby trunk CI.

https://github.com/ruby/irb/commit/b2cd07e795
---
 lib/irb/color.rb | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/irb/color.rb b/lib/irb/color.rb
index c4513f5b0b..8307af25a9 100644
--- a/lib/irb/color.rb
+++ b/lib/irb/color.rb
@@ -77,7 +77,15 @@ module IRB # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/irb/color.rb#L77
 
     class << self
       def colorable?
-        $stdout.tty? && (/mswin|mingw/ =~ RUBY_PLATFORM || (ENV.key?('TERM') && ENV['TERM'] != 'dumb')) && IRB.conf.fetch(:USE_COLORIZE, true)
+        supported = $stdout.tty? && (/mswin|mingw/ =~ RUBY_PLATFORM || (ENV.key?('TERM') && ENV['TERM'] != 'dumb'))
+
+        # because ruby/debug also uses irb's color module selectively,
+        # irb won't be activated in that case.
+        if IRB.respond_to?(:conf)
+          supported && IRB.conf.fetch(:USE_COLORIZE, true)
+        else
+          supported
+        end
       end
 
       def inspect_colorable?(obj, seen: {}.compare_by_identity)
-- 
cgit v1.2.1


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