template.rb

# Add the current directory to the path Thor uses
#  to look up files

RAILS_REQUIREMENT = "~> 4.2.6"

def apply_template!
  add_template_repository_to_source_path
  assert_minimum_rails_version
  template "Gemfile.tt", :force => true
  # assert_valid_options
  assert_postgresql
  copy_file "gitignore", ".gitignore", :force => true
  copy_file "Capfile"
  copy_file "config.ru", :force => true
  copy_file "rspec", ".rspec"
  apply "config/template.rb"
  apply "app/template.rb"
end

def add_template_repository_to_source_path
  if __FILE__ =~ %r{\Ahttps?://}
    # this portiion is not working
    source_paths.unshift(tempdir = Dir.mktmpdir("rails-template-"))
    at_exit { FileUtils.remove_entry(tempdir) }
    git :clone => [
      "--quiet",
      "https://peter_karth@bitbucket.org/peter_karth/yggdrasil.git",
      tempdir
    ].map(&:shellescape).join(" ")
  else
    source_paths.unshift(File.dirname(__FILE__))
  end
end

require "fileutils"
require "shellwords"

def assert_minimum_rails_version
  requirement = Gem::Requirement.new(RAILS_REQUIREMENT)
  rails_version = Gem::Version.new(Rails::VERSION::STRING)
  return if requirement.satisfied_by?(rails_version)

  prompt = "This template requires Rails #{RAILS_REQUIREMENT}. "\
    "You are using #{rails_version}. Continue anyway?"
  exit 1 if no?(prompt)
end

# Bail out if user has passed in contradictory generator options.
def assert_valid_options
  valid_options = {
    :skip_gemfile => false,
    :skip_bundle => false,
    :skip_git => false,
    :skip_test_unit => false,
    :edge => false
  }
  valid_options.each do |key, expected|
    next unless options.key?(key)
    actual = options[key]
    unless actual == expected
      fail Rails::Generators::Error, "Unsupported option: #{key}=#{actual}"
    end
  end
end

def assert_postgresql
  return if IO.read("Gemfile") =~ /^\s*gem ['"]pg['"]/
  fail Rails::Generators::Error,
    "This template requires PostgreSQL, "\
    "but the pg gem isn’t present in your Gemfile."
end

apply_template!