Contents

require 'thread'

module Mutagem

  #  A simple external process management wrapper
  #
  # @example
  #
  #     cmd = "diff file1.txt file2.txt"
  #     task = Mutagem::Task.new(cmd)
  #     task.join
  #
  #     if (task.exitstatus == 0)
  #       puts "files match"
  #     end
  class Task
    # @return [String] command to run
    attr_reader :cmd

    # Create a new Task
    #
    # @param [String] cmd the cmd to execute
    def initialize(cmd)
      $stdout.sync = true
      @cmd = cmd
    end

    # @return [Array] array of strings from the subprocess output
    def output
      @output
    end

    # @return subprocess exit status
    def exitstatus
      @exitstatus
    end

    # @return subprocess pid
    def pid
      @pid
    end

    # @return [Exception] exception returned if one is thrown by Task
    def exception
      @exception
    end

    # run the cmd
    def run
      pipe = IO.popen(@cmd + " 2>&1")
      @pid = pipe.pid
      begin
        @output = pipe.readlines
        pipe.close
        @exitstatus = $?.exitstatus
      rescue => e
        @exception = e
      end
    end
    alias :join :run

  end

end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
mutagem-0.2.4	lib/mutagem/task.rb
mutagem-0.2.3	lib/mutagem/task.rb
mutagem-0.2.2	lib/mutagem/task.rb
mutagem-0.2.1	lib/mutagem/task.rb
mutagem-0.2.0	lib/mutagem/task.rb