Gem::Ext::Builder.run

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/ext/builder.rb, line 89
def self.run(command, results, command_name = nil, dir = Dir.pwd, env = {})
  verbose = Gem.configuration.really_verbose

  begin
    rubygems_gemdeps = ENV["RUBYGEMS_GEMDEPS"]
    ENV["RUBYGEMS_GEMDEPS"] = nil
    if verbose
      puts("current directory: #{dir}")
      p(command)
    end
    results << "current directory: #{dir}"
    results << shelljoin(command)

    require "open3"
    # Set $SOURCE_DATE_EPOCH for the subprocess.
    # Under Ruby::Box defined?($gvar) does not see assignments made inside the
    # box, so mkmf have_devel? never memoizes and recurses until SystemStackError
    # (https://bugs.ruby-lang.org/issues/22283).
    # Drop $RUBY_BOX last so no caller can restore it.
    build_env = { "SOURCE_DATE_EPOCH" => Gem.source_date_epoch_string }.merge(env).merge("RUBY_BOX" => nil)
    # A single-element command would be parsed as a shell command line,
    # splitting an unquoted command path containing spaces. Use the
    # [cmdname, argv0] form to keep exec semantics.
    command = [[command.first, command.first]] if command.size == 1
    output, status = begin
                       Open3.popen2e(build_env, *command, chdir: dir) do |stdin, stdouterr, wait_thread|
                         stdin.close
                         output = String.new
                         while line = stdouterr.gets
                           output << line
                           if verbose
                             print line
                           end
                         end
                         [output, wait_thread.value]
                       end
                     rescue StandardError => error
                       raise Gem::InstallError, "#{command_name || class_name} failed#{error.message}"
                     end
    unless verbose
      results << output
    end
  ensure
    ENV["RUBYGEMS_GEMDEPS"] = rubygems_gemdeps
  end

  unless status.success?
    results << "Building has failed. See above output for more information on the failure." if verbose
  end

  yield(status, results) if block_given?

  unless status.success?
    exit_reason =
      if status.exited?
        ", exit code #{status.exitstatus}"
      elsif status.signaled?
        ", uncaught signal #{status.termsig}"
      end

    raise Gem::InstallError, "#{command_name || class_name} failed#{exit_reason}"
  end
end