An example of Rails template file.

rails3-template.rb

remove_file 'README'

create_file "README.md" do
  "# Fortunka\n\nTODO"
end

remove_file "public/index.html"

gem "simple_form"
generate "simple_form:install"

generate :scaffold, "fortune body:text"
rake "db:migrate"

route "resources :fortunes"
route "root :to => 'fortunes#index'"

gsub_file "app/views/layouts/application.html.erb", /<body/ do |match|
  match << " class='fortunes'"
end

gsub_file "app/assets/stylesheets/fortunes.css.scss", /Then, place scoped styles here.\s*\n/  do |match|
  match.concat <<CSS
  width: 640px;
  margin: 1em auto;
  padding: 1em 1em 2em 1em;
  border: 1px solid black;
  font-size: 16px;
  line-height: 22px;
CSS
end

append_to_file "app/assets/stylesheets/fortunes.css.scss" do
  background_color = ask("What is your preferred CSS background color?")
  <<CSS

html {
  background-color: #{background_color};
}
CSS
end

git :init
git :add => "."
git :commit => "-a -m 'Pierwsza wrzutka'"

Useful stuff. Copied from a RailsWizard.org recipe.

def say_wizard(text); say "\033[36m" + "wizard".rjust(10) + "\033[0m" + " #{text}" end 
@after_blocks = []
def after_bundler(&block); @after_blocks << block; end
# rails template
say_wizard "Running after Bundler callbacks."
@after_blocks.each{|b| b.call}

RDoc:

• Module Rails::Generators::Actions
• Thor::Actions