method

setup_pager

Ruby latest stable (v1_9_3_392) - 0 notes - Class: Driver

1_8_6_287
1_8_7_72
1_8_7_330
1_9_1_378
1_9_2_180 (0)
1_9_3_125 (0)
1_9_3_392 (0)
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setup_pager() public

Sets up a pager program to pass output through. Tries the RI_PAGER and PAGER environment variables followed by pager, less then more.

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# File lib/rdoc/ri/driver.rb, line 1151
  def setup_pager
    return if @use_stdout

    pagers = [ENV['RI_PAGER'], ENV['PAGER'], 'pager', 'less', 'more']

    pagers.compact.uniq.each do |pager|
      next unless pager

      pager_cmd = pager.split.first

      next unless in_path? pager_cmd

      io = IO.popen(pager, 'w') rescue next

      next if $? and $?.exited? # pager didn't work

      @paging = true

      return io
    end

    @use_stdout = true

    nil
  end

setup_pager

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