middleman/middleman-core/lib/middleman-core/templates/local.rb

# Local templates
class Middleman::Templates::Local < Middleman::Templates::Base
  
  # Look for templates in ~/.middleman
  # @return [String]
  def self.source_root
    File.join(File.expand_path("~/"), ".middleman")
  end

  # Just copy from the template path
  # @return [void]
  def build_scaffold!
    directory options[:template].to_s, location
  end  
end

# Iterate over the directories in the templates path and register each one.
Dir[File.join(Middleman::Templates::Local.source_root, "*")].each do |dir|
  next unless File.directory?(dir)
  Middleman::Templates.register(File.basename(dir).to_sym, Middleman::Templates::Local)
end