Class: EventMachine::SystemCommand::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/em-systemcommand/builder.rb

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Builder

Returns a new instance of Builder.



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# File 'lib/em-systemcommand/builder.rb', line 7

def initialize *args
  unless args.length > 0
    raise "You have to provide at least one argument as command"
  end
  @arr = args
end

Instance Method Details

#add(opt, val = nil) ⇒ Object Also known as: << 



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# File 'lib/em-systemcommand/builder.rb', line 14

def add opt, val = nil
  if opt.is_a?(Array)
    opt.each do |element|
      add *element
    end
  else
    if val
      @arr << [ opt, val ]
    else
      @arr << opt
    end
  end
  self
end

#to_s ⇒ Object

Returns the command string



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# File 'lib/em-systemcommand/builder.rb', line 32

def to_s
  cmd = ''
  @arr.each do |arg|
    if arg == @arr.first
      cmd << arg
    elsif arg.is_a?(Array)
      param, value = arg.first.to_s, arg.last.to_s

      if param =~ /^\-{1,2}(.*)/
        param = $1
      end

      if param.length == 1
        cmd << ' ' << "-#{param} #{Escape.shell_single_word(value)}"
      else
        cmd << ' ' << "--#{param}=#{Escape.shell_single_word(value)}"
      end
    elsif arg.is_a?(Symbol)
      arg = arg.to_s
      if arg.length == 1
        cmd << ' ' << "-#{arg}"
      else
        cmd << ' ' << "--#{arg}"
      end
    elsif arg.is_a?(String) && arg.strip =~ /^\-/
      cmd << ' ' << arg
    else
      cmd << ' ' << Escape.shell_single_word(arg.to_s)
    end
  end
  cmd
end