Class: Archive::OperatingSystem

Inherits:
Object
  • Object
show all
Defined in:
lib/archive/operating_system.rb

Overview

Note:

Copyright © 2014 by The Board of Trustees of the Leland Stanford Junior University. All rights reserved. See LICENSE for details.

A wrapper class around the systemu gem that is used for shelling out to the operating system and executing a command

Class Method Summary collapse

Class Method Details

.execute(command) ⇒ String

Executes a system command in a subprocess. The method will return stdout from the command if execution was successful. The method will raise an exception if if execution fails. The exception’s message will contain the explaination of the failure.

Parameters:

  • command (String) —

    the command to be executed

Returns:

  • (String) —

    stdout from the command if execution was successful



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# File 'lib/archive/operating_system.rb', line 19

def OperatingSystem.execute(command)
  status, stdout, stderr = systemu(command)
  if (status.exitstatus != 0)
    raise stderr
  end
  return stdout
rescue
  msg = "Command failed to execute: [#{command}] caused by <STDERR = #{stderr.split($/).join('; ')}>"
  msg << " STDOUT = #{stdout.split($/).join('; ')}" if (stdout && (stdout.length > 0))
  raise msg
end