Class: AptControl::Exec

Inherits:
Object
  • Object
show all
Defined in:
lib/apt_control/exec.rb

Overview

ripped from vershunt

Defined Under Namespace

Modules: Helpers Classes: UnexpectedExitStatus

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Exec

Returns a new instance of Exec.



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# File 'lib/apt_control/exec.rb', line 46

def initialize(options={})
  @name   = options.fetch(:name,   nil)
  @quiet  = options.fetch(:quiet,  true)
  @output = options.fetch(:output, $stdout)
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/apt_control/exec.rb', line 42

def name
  @name
end

#quiet ⇒ Object (readonly) Also known as: quiet?

Returns the value of attribute quiet.



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# File 'lib/apt_control/exec.rb', line 43

def quiet
  @quiet
end

Class Method Details

.exec(command, options = {}) ⇒ Object 



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# File 'lib/apt_control/exec.rb', line 38

def self.exec(command, options={})
  new(options).exec(command, options)
end

Instance Method Details

#exec(command, options = {}) ⇒ Object 



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# File 'lib/apt_control/exec.rb', line 68

def exec(command, options={})

  expected = to_expected_array(options.fetch(:status, 0))

  @last_stdout = ""
  @last_stderr = ""
  @last_output = ""

  output_semaphore = Mutex.new

  start = name.nil? ? '' : "#{name}: "

  status = POpen4::popen4(command) do |stdout, stderr, stdin, pid|
    t1 = Thread.new do
      stdout.each_line do |line|
        @last_stdout += line
        output_semaphore.synchronize { @last_output += line }
        @output.puts("#{start}#{line}") unless quiet?
      end
    end

    t2 = Thread.new do
      stderr.each_line do |line|
        @last_stderr += line
        output_semaphore.synchronize { @last_output += line }
        @output.puts("#{start}#{line}") unless quiet?
      end
    end

    t1.join
    t2.join
  end

  @last_exitstatus = status.exitstatus

  unless expected.nil? || expected.include?(status.exitstatus)
    raise UnexpectedExitStatus.new(expected, status.exitstatus, command, @last_output, @last_stdout, @last_stderr)
  end

  @last_stdout
end

#last_exitstatus ⇒ Object 



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# File 'lib/apt_control/exec.rb', line 64

def last_exitstatus
  @last_exitstatus
end

#last_output ⇒ Object 



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# File 'lib/apt_control/exec.rb', line 60

def last_output
  @last_output
end

#last_stderr ⇒ Object 



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# File 'lib/apt_control/exec.rb', line 56

def last_stderr
  @last_stderr
end

#last_stdout ⇒ Object 



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# File 'lib/apt_control/exec.rb', line 52

def last_stdout
  @last_stdout
end