https://git.ruby-lang.org/ruby.git/commit/?id=c710cdb905

From c710cdb905a58b4ef0c7b5a9a8e867b382ccfd66 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@r...>
Date: Tue, 14 Dec 2021 15:56:03 +0100
Subject: [rubygems/rubygems] Improve error message if only platform doesn't
 match

https://github.com/rubygems/rubygems/commit/077e3c2e4d
---
 lib/bundler/resolver.rb | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/lib/bundler/resolver.rb b/lib/bundler/resolver.rb
index 8830621e0ef..dfea95e30a5 100644
--- a/lib/bundler/resolver.rb
+++ b/lib/bundler/resolver.rb
@@ -264,13 +264,23 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/resolver.rb#L264
         else
           source = source_for(name)
           specs = source.specs.search(name)
+          matching_part = name
+          requirement_label = SharedHelpers.pretty_dependency(requirement)
           cache_message = begin
                               " or in gems cached in #{Bundler.settings.app_cache_path}" if Bundler.app_cache.exist?
                             rescue GemfileNotFound
                               nil
                             end
-          message = String.new("Could not find gem '#{SharedHelpers.pretty_dependency(requirement)}' in #{source}#{cache_message}.\n")
-          message << "The source contains the following gems matching '#{name}': #{specs.map(&:full_name).join(", ")}" if specs.any?
+          specs_matching_requirement = specs.select {| spec| requirement.matches_spec?(spec) }
+
+          if specs_matching_requirement.any?
+            specs = specs_matching_requirement
+            matching_part = requirement_label
+            requirement_label = "#{requirement_label} #{requirement.__platform}"
+          end
+
+          message = String.new("Could not find gem '#{requirement_label}' in #{source}#{cache_message}.\n")
+          message << "The source contains the following gems matching '#{matching_part}': #{specs.map(&:full_name).join(", ")}" if specs.any?
         end
         raise GemNotFound, message
       end
-- 
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