# File lib/cliver/shell_capture.rb, line 13
    def initialize(command)
      command = command.shelljoin if command.kind_of?(Array)
      @stdout = @stderr = ''
      begin
        Open3.popen3(command) do |i, o, e|
          @stdout = o.read.chomp
          @stderr = e.read.chomp
        end
        # Fix for ruby 1.8.7 (and probably earlier):
        # Open3.popen3 does not raise anything there, but the error goes to STDERR.
        if @stderr =~ /open3.rb:\d+:in `exec': No such file or directory -.*\(Errno::ENOENT\)/ or
           @stderr =~ /An exception occurred in a forked block\W+No such file or directory.*\(Errno::ENOENT\)/
          @stderr = ''
          @command_found = false
        else
          @command_found = true
        end
      rescue Errno::ENOENT, IOError
        @command_found = false
      end
    end