Module: Useful::RubyExtensions::Object

Included in:
Object
Defined in:
lib/useful/ruby_extensions/object.rb

Defined Under Namespace

Modules: FromActivesupport

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(receiver) ⇒ Object 



105
106
107
 
# File 'lib/useful/ruby_extensions/object.rb', line 105

def self.included(receiver)
  receiver.send :include, FromActivesupport
end

Instance Method Details

#capture_std_output ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
 
# File 'lib/useful/ruby_extensions/object.rb', line 19

def capture_std_output
  out = ::StringIO.new
  err = ::StringIO.new
  $stdout = out
  $stderr = err
  yield
  return out, err
ensure
  $stdout = STDOUT
  $stderr = STDERR
end

#false? ⇒ Boolean Also known as: is_false?

Returns:

  • (Boolean) 


9
10
11
 
# File 'lib/useful/ruby_extensions/object.rb', line 9

def false?
  self == false
end

#sudo(cmd, logger = nil, &block) ⇒ Object

Invokes a system command using “ and pass the status and result to a given block



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/useful/ruby_extensions/object.rb', line 33

def sudo(cmd, logger=nil, &block)
  begin
    require 'open4' unless defined?(::Open4)
  rescue LoadError => err
    puts "you need open4 to run the sudo helper: gem install open4"
  else
    logger.debug "`sudo #{cmd}` ..." if logger && logger.respond_to?(:debug)
    result = {}
    status = Open4.popen4("sudo #{cmd}") do |pid, stdin_io, stdout_io, stderr_io|
      result[:out] = stdout_io.gets
      result[:err] = stderr_io.gets
    end
    if block
      block.call(status, status.success? ? result[:out] : result[:err])
    else
      status
    end
  end
end

#true? ⇒ Boolean Also known as: is_true?

Returns:

  • (Boolean) 


14
15
16
 
# File 'lib/useful/ruby_extensions/object.rb', line 14

def true?
  self == true
end