A sample LWRP per #drupal-colorado conversation

gistfile1.rb

require 'fileutils'
require 'tempfile'

action :ensure do
  t_file = Tempfile.new('/root/.profile_temp')
  ::File.open(new_resource.profile, 'r') do |f|
    f.each_line do |line|
      if line.match(/PATH=/)
        if ::File.readlines(new_resource.profile).grep(/:#{new_resource.path.gsub('/','\/')}/).length > 0
          t_file.puts line
        else
          new_line = line.split("\n")[0]
          t_file.puts "#{new_line}:#{new_resource.path}\n"
        end
      else
        t_file.puts line
      end
   end
  end

  FileUtils.mv(t_file.path, new_resource.profile)
  FileUtils.chmod(0600, new_resource.profile)
end

action :purge do
  t_file = Tempfile.new('/root/.profile_temp')
  ::File.open(new_resource.profile, 'r') do |f|
    f.each_line do |line|
      if line.match(/PATH=/)
        t_file.puts line.sub(":#{new_resource.path}",'')
      else
        t_file.puts line
      end
   end
  end

  FileUtils.mv(t_file.path, new_resource.profile)
  FileUtils.chmod(0600, new_resource.profile)
end