Rake task for copying files from previous sinatra project

gistfile1.rb

desc "Call this when creating new project"
task :bootstrap do
  # Clean just edited rakefile ;)                                                                                                                            
  sh( "rm *~" ) unless Dir[ "*~" ].empty?

  # Directories..                                                                                                                                            
  @prev = ENV[ "PREV" ] || "azsservice"
  sh( "mkdir -p app/controllers" )
  sh( "mkdir -p app/views" )
  sh( "mkdir -p app/models" )
  sh( "mkdir config" )
  %w( main models ).each do |filename|
    sh( "cp ../#{@prev}/app/#{filename}.rb app/" )
  end

  # ..and models                                                                                                                                             
  @models = ENV[ "MODELS" ].to_s.split( "," )
  @models.each do |model|
    sh( "cp ../#{@prev}/app/models/#{model}.rb app/models" )
  end

  ### public directory                                                                                                                                       
  sh( "mkdir -p public/stylesheets" )
  sh( "touch public/stylesheets/app.css" )
  sh( "cp ../#{@prev}/public/stylesheets/jquery-ui.css public/stylesheets/" )
  sh( "mkdir -p public/stylesheets/images/" )
  sh( "cp ../#{@prev}/public/stylesheets/images/* public/stylesheets/images/" )
  sh( "mkdir -p public/javascripts" )
  sh( "mkdir -p public/images" )

  # Git repository                                                                                                                                           
  sh( "git init" )
  sh( "git add ." )

  sh( "cp ../#{@prev}/.git/info/exclude ./.git/info/" )
end