Class: Sprout::ProcessRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/sprout/process_runner.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*command) ⇒ ProcessRunner

Returns a new instance of ProcessRunner.



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# File 'lib/sprout/process_runner.rb', line 12

def initialize(*command)
  @command = command
  begin
    @alive = true
    usr = User.new()
    if(usr.is_a?(WinUser) && !usr.is_a?(CygwinUser))
      gem 'win32-open3'
      require 'win32/open3'
      Open3.popen3(*@command) do |w, r, e, pid|
        @w = w
        @r = r
        @e = e
        @pid = pid
      end
    else
      require 'open4'
      @pid, @w, @r, @e = open4.popen4(*@command)
    end
  rescue Errno::EACCES => e
    update_executable_mode(*@command)
    @pid, @w, @r, @e = open4.popen4(*@command)
  rescue Errno::ENOENT => e
    @alive = false
    part = command[0].split(' ').shift
    raise ProcessRunnerError.new("The expected executable was not found for command [#{part}], please check your system path and/or sprout definition")
  end
end

Instance Attribute Details

#e ⇒ Object (readonly)

Returns the value of attribute e.



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# File 'lib/sprout/process_runner.rb', line 7

def e
  @e
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/sprout/process_runner.rb', line 7

def pid
  @pid
end

#r ⇒ Object (readonly)

Returns the value of attribute r.



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# File 'lib/sprout/process_runner.rb', line 7

def r
  @r
end

#w ⇒ Object (readonly)

Returns the value of attribute w.



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# File 'lib/sprout/process_runner.rb', line 7

def w
  @w
end

Instance Method Details

#alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sprout/process_runner.rb', line 53

def alive?
  @alive = update_status
end

#close ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 61

def close
  update_status
end

#close_write ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 99

def close_write
  @w.close_write
end

#flush ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 83

def flush
  @w.flush
end

#getc ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 87

def getc
  @r.getc
end

#kill ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 57

def kill
  Process.kill(9, pid)
end

#print(msg) ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 91

def print(msg)
  @w.print msg
end

#puts(msg) ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 95

def puts(msg)
  @w.puts(msg)
end

#read ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 103

def read
  return @r.read
end

#read_err ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 107

def read_err
  return @e.read
end

#readlines ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 79

def readlines
  @r.readlines
end

#readpartial(count) ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 75

def readpartial(count)
  @r.readpartial(count)
end

#update_executable_mode(*command) ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 40

def update_executable_mode(*command)
  parts = command.join(' ').split(' ')
  str = parts.shift
  while(parts.size > 0)
    if(File.exists?(str))
      FileUtils.chmod(744, str)
      return
    else
      str << " #{parts.shift}"
    end
  end
end

#update_status ⇒ Object 



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# File 'lib/sprout/process_runner.rb', line 65

def update_status
  pid_int = Integer("#{ @pid }")
  begin
    Process::kill 0, pid_int
    true
  rescue Errno::ESRCH
    false
  end
end