Phoda.rb

# Kivanio Barbosa
# Class to remove or install gems
class Phoda
  attr_accessor :command
  attr_accessor :file
  attr_accessor :sudo

  def initialize(command,file,sudo=false)
    raise "Need some existent File." unless File.exist?(file)
    @file = file
    @command = command
    @sudo = sudo
  end

  def vai
    case @command
    when "install"
      instala_gems(carrega_file)
    when "uninstall"
      remove_gems(carrega_file)
    else
      "Don't know this command: #{@command}, try 'install' or 'uninstall'"
    end
  end

  def instala_gems(gemas)
    gemas.each do |gem|
      p "installing #{gem}"
      if @sudo
        system("sudo gem install #{gem}")
      else
        system("gem install #{gem}")
      end
    end
  end

  def remove_gems(gemas)
    gemas.each do |gem|
      p "uninstalling #{gem}"
      if @sudo
        system("sudo gem uninstall #{gem}")
      else
        system("gem uninstall #{gem}")
      end
    end
  end

  def carrega_file
    # put lines on Array
    gemas=[]
    linhas = File.readlines(@file).map {|l| l.rstrip}
    linhas.select do |l| 
      gemas << l.split(/ /)[0]
    end
    gemas
  end
end