# CBlackburn Command class
# Wraps arbitrary command lines for execution
# within Ruby programs
#
# Author: Chris Blackburn(cblackburn@cbciweb.com)
# Copyright: (c) 2006 Chris Blackburn
# License: GPL: http://www.gnu.org/copyleft/gpl.html
# Date: December 22, 2006
# $Revision:$
# 
class CbCommand
  attr_reader :output
  attr_reader :command_line
  attr_reader :exec_time
  attr_reader :success
  
  def initialize(command_line, working_directory=nil)
    @command_line = command_line
    @working_directory = working_directory
    @output = nil
  end
  
  def run?
    run
    return @success
  end
  
  #Runs the command.
  def run
    prev_dir = Dir.pwd
    time_begin = Time.new
    time_end = nil
    begin
      Dir.chdir(@working_directory) if @working_directory
      @cmd = IO.popen("#{@command_line} 2>&1")
      time_end = Time.new
      @output = @cmd.readlines
      @success = true
      @exec_time = time_end.to_f - time_begin.to_f
      return @success
    rescue SystemCallError
      @success = false
      return false
    ensure
      Dir.chdir(prev_dir)
    end
  end
  
end