module Rails::Generators

# File railties/lib/rails/generators.rb, line 115
def api_only!
  hide_namespaces "assets", "helper", "css", "js"

  options[:rails].merge!(
    api: true,
    assets: false,
    helper: false,
    template_engine: nil
  )

  if ARGV.first == "mailer"
    options[:rails].merge!(template_engine: :erb)
  end
end

# File railties/lib/rails/generators.rb, line 107
def fallbacks
  @fallbacks ||= {}
end

# File railties/lib/rails/generators.rb, line 178
def help(command = "generate")
  puts "Usage: rails #{command} GENERATOR [args] [options]"
  puts
  puts "General options:"
  puts "  -h, [--help]     # Print generator's options and usage"
  puts "  -p, [--pretend]  # Run but do not make any changes"
  puts "  -f, [--force]    # Overwrite files that already exist"
  puts "  -s, [--skip]     # Skip files that already exist"
  puts "  -q, [--quiet]    # Suppress status output"
  puts
  puts "Please choose a generator below."
  puts

  print_generators
end

# File railties/lib/rails/generators.rb, line 140
def hidden_namespaces
  @hidden_namespaces ||= begin
    orm      = options[:rails][:orm]
    test     = options[:rails][:test_framework]
    template = options[:rails][:template_engine]
    css      = options[:rails][:stylesheet_engine]

    [
      "rails",
      "resource_route",
      "#{orm}:migration",
      "#{orm}:model",
      "#{test}:controller",
      "#{test}:helper",
      "#{test}:integration",
      "#{test}:system",
      "#{test}:mailer",
      "#{test}:model",
      "#{test}:scaffold",
      "#{test}:view",
      "#{test}:job",
      "#{template}:controller",
      "#{template}:scaffold",
      "#{template}:mailer",
      "#{css}:scaffold",
      "#{css}:assets",
      "css:assets",
      "css:scaffold"
    ]
  end
end

# File railties/lib/rails/generators.rb, line 172
def hide_namespaces(*namespaces)
  hidden_namespaces.concat(namespaces)
end

# File railties/lib/rails/generators.rb, line 265
def invoke(namespace, args = ARGV, config = {})
  names = namespace.to_s.split(":")
  if klass = find_by_namespace(names.pop, names.any? && names.join(":"))
    args << "--help" if args.empty? && klass.arguments.any?(&:required?)
    klass.start(args, config)
  else
    options     = sorted_groups.flat_map(&:last)
    suggestions = options.sort_by { |suggested| levenshtein_distance(namespace.to_s, suggested) }.first(3)
    msg =  "Could not find generator '#{namespace}'. "
    msg << "Maybe you meant #{ suggestions.map { |s| "'#{s}'" }.to_sentence(last_word_connector: " or ", locale: :en) }\n"
    msg << "Run `rails generate --help` for more options."
    puts msg
  end
end

# File railties/lib/rails/generators.rb, line 131
def no_color!
  Thor::Base.shell = Thor::Shell::Basic
end

# File railties/lib/rails/generators.rb, line 199
def print_generators
  sorted_groups.each { |b, n| print_list(b, n) }
end

# File railties/lib/rails/generators.rb, line 194
def public_namespaces
  lookup!
  subclasses.map(&:namespace)
end

# File railties/lib/rails/generators.rb, line 203
def sorted_groups
  namespaces = public_namespaces
  namespaces.sort!

  groups = Hash.new { |h, k| h[k] = [] }
  namespaces.each do |namespace|
    base = namespace.split(":").first
    groups[base] << namespace
  end

  rails = groups.delete("rails")
  rails.map! { |n| n.sub(/^rails:/, "") }
  rails.delete("app")
  rails.delete("plugin")
  rails.delete("encrypted_secrets")

  hidden_namespaces.each { |n| groups.delete(n.to_s) }

  [[ "rails", rails ]] + groups.sort.to_a
end

# File railties/lib/rails/generators.rb, line 303
def command_type # :doc:
  @command_type ||= "generator"
end

# File railties/lib/rails/generators.rb, line 311
def file_lookup_paths # :doc:
  @file_lookup_paths ||= [ "{#{lookup_paths.join(',')}}", "**", "*_generator.rb" ]
end

# File railties/lib/rails/generators.rb, line 307
def lookup_paths # :doc:
  @lookup_paths ||= %w( rails/generators generators )
end

# File railties/lib/rails/generators.rb, line 282
def print_list(base, namespaces) # :doc:
  namespaces = namespaces.reject { |n| hidden_namespaces.include?(n) }
  super
end