nobu	2016-09-05 09:58:23 +0900 (Mon, 05 Sep 2016)

  New Revision: 56070

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=56070

  Log:
    rbinstall.rb: install just one gemspec [ci skip]
    
    * tool/rbinstall.rb (gem): install gemspec match with the
      directory only.  some gems, (e.g., json) have multiple gemspec
      files.

  Modified files:
    trunk/tool/rbinstall.rb
Index: tool/rbinstall.rb
===================================================================
--- tool/rbinstall.rb	(revision 56069)
+++ tool/rbinstall.rb	(revision 56070)
@@ -761,6 +761,7 @@ install?(:ext, :comm, :gem) do https://github.com/ruby/ruby/blob/trunk/tool/rbinstall.rb#L761
       Gem::Specification.load(File.basename(path))
     }
     next unless spec.platform == Gem::Platform::RUBY
+    next unless spec.full_name == path[srcdir.size..-1][/\A\/gems\/([^\/]+)/, 1]
     spec.extension_dir = "#{extensions_dir}/#{spec.full_name}"
     if File.directory?(ext = "#{gem_ext_dir}/#{spec.full_name}")
       spec.extensions[0] ||= "-"

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