Include ABI-scoped dirs in gem contents --spec-dir output

Assisted-By: devx/9c2464e2-74cd-4d36-a6c0-50aef8c2ad01

Author: jenshenny

lib/rubygems/commands/contents_command.rb

@@ -198,7 +198,7 @@ def spec_for(name)
 
   def specification_directories # :nodoc:
     options[:specdirs].flat_map do |i|
-      [i, File.join(i, "specifications")]
+      Gem::SpecificationRecord.dirs_with_abi([i, File.join(i, "specifications")])
     end
   end
 end

test/rubygems/test_gem_commands_contents_command.rb

@@ -62,6 +62,22 @@ def test_execute_bad_gem
     assert_equal "", @ui.error
   end
 
+  def test_execute_bad_gem_with_spec_dir
+    @cmd.options[:args] = %w[foo]
+    @cmd.options[:specdirs] = [@gemhome]
+
+    assert_raise Gem::MockGemUi::TermError do
+      use_ui @ui do
+        @cmd.execute
+      end
+    end
+
+    assert_match(/Unable to find gem 'foo' in specified path/, @ui.output)
+    assert_match(/Directories searched:/, @ui.output)
+    assert_match(File.join(@gemhome, "specifications", Gem.ruby_abi), @ui.output)
+    assert_equal "", @ui.error
+  end
+
   def test_execute_exact_match
     @cmd.options[:args] = %w[foo]
     gem "foo"