gistfile1.rb

require 'popen4'

class Exec
  attr_reader :stdout
  attr_reader :stderr
  attr_reader :status
  attr_reader :failure

  def initialize *args
    @stdout = nil
    @stderr = nil
    @status = nil
    @cmd = nil

    if args.length == 1
      self.do args.shift
    end
  end

  def do cmd
    @stdout = nil
    @stderr = nil
    @status = nil
    @cmd = cmd
    
    if @cmd.length == 0
      puts "Cowardly refusing to execute empty command"
      return
    end

    h = Hash.new
    
    status = POpen4::popen4(cmd) do |stdout,stderr,stdin,pid|
      stdin.close
      @stdout = stdout.read.strip
      @stderr = stderr.read.strip
    end

    @status = status.exitstatus

    if @status == 0
      @failure = false
    else 
      @failure = true
    end
  end

  def to_s
    messages = []
    messages << "Command '#{@cmd}' FAILED with exitstatus: '#{@status}'"
    @stdout.each_line { |line| messages << "stdout: #{line}" }
    @stderr.each_line { |line| messages << "stderr: #{line}" }
    messages.each { |message| puts message }
    (messages.join + "\n")
  end

  def failure?
    @failure
  end
end