activesupport_path = File.expand_path('../../../../activesupport/lib', __FILE__) $:.unshift(activesupport_path) if File.directory?(activesupport_path) && !$:.include?(activesupport_path) require 'thor/group' require 'active_support' require 'active_support/core_ext/object/blank' require 'active_support/core_ext/kernel/singleton_class' require 'active_support/core_ext/array/extract_options' require 'active_support/core_ext/hash/deep_merge' require 'active_support/core_ext/module/attribute_accessors' require 'active_support/core_ext/string/inflections' module Rails module Generators autoload :Actions, 'rails/generators/actions' autoload :ActiveModel, 'rails/generators/active_model' autoload :Base, 'rails/generators/base' autoload :Migration, 'rails/generators/migration' autoload :NamedBase, 'rails/generators/named_base' autoload :ResourceHelpers, 'rails/generators/resource_helpers' autoload :TestCase, 'rails/generators/test_case' mattr_accessor :namespace DEFAULT_ALIASES = { rails: { actions: '-a', orm: '-o', javascripts: '-j', javascript_engine: '-je', resource_controller: '-c', scaffold_controller: '-c', stylesheets: '-y', stylesheet_engine: '-se', template_engine: '-e', test_framework: '-t' }, test_unit: { fixture_replacement: '-r', } } DEFAULT_OPTIONS = { rails: { assets: true, force_plural: false, helper: true, integration_tool: nil, javascripts: true, javascript_engine: :js, orm: false, resource_controller: :controller, resource_route: true, scaffold_controller: :scaffold_controller, stylesheets: true, stylesheet_engine: :css, test_framework: false, template_engine: :erb } } def self.configure!(config) #:nodoc: no_color! unless config.colorize_logging aliases.deep_merge! config.aliases options.deep_merge! config.options fallbacks.merge! config.fallbacks templates_path.concat config.templates templates_path.uniq! hide_namespaces(*config.hidden_namespaces) end def self.templates_path #:nodoc: @templates_path ||= [] end def self.aliases #:nodoc: @aliases ||= DEFAULT_ALIASES.dup end def self.options #:nodoc: @options ||= DEFAULT_OPTIONS.dup end # Hold configured generators fallbacks. If a plugin developer wants a # generator group to fallback to another group in case of missing generators, # they can add a fallback. # # For example, shoulda is considered a test_framework and is an extension # of test_unit. However, most part of shoulda generators are similar to # test_unit ones. # # Shoulda then can tell generators to search for test_unit generators when # some of them are not available by adding a fallback: # # Rails::Generators.fallbacks[:shoulda] = :test_unit def self.fallbacks @fallbacks ||= {} end # Remove the color from output. def self.no_color! Thor::Base.shell = Thor::Shell::Basic end # Track all generators subclasses. def self.subclasses @subclasses ||= [] end # Rails finds namespaces similar to thor, it only adds one rule: # # Generators names must end with "_generator.rb". This is required because Rails # looks in load paths and loads the generator just before it's going to be used. # # find_by_namespace :webrat, :rails, :integration # # Will search for the following generators: # # "rails:webrat", "webrat:integration", "webrat" # # Notice that "rails:generators:webrat" could be loaded as well, what # Rails looks for is the first and last parts of the namespace. def self.find_by_namespace(name, base=nil, context=nil) #:nodoc: lookups = [] lookups << "#{base}:#{name}" if base lookups << "#{name}:#{context}" if context unless base || context unless name.to_s.include?(?:) lookups << "#{name}:#{name}" lookups << "rails:#{name}" end lookups << "#{name}" end lookup(lookups) namespaces = Hash[subclasses.map { |klass| [klass.namespace, klass] }] lookups.each do |namespace| klass = namespaces[namespace] return klass if klass end invoke_fallbacks_for(name, base) || invoke_fallbacks_for(context, name) end # Receives a namespace, arguments and the behavior to invoke the generator. # It's used as the default entry point for generate, destroy and update # commands. def self.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 ") }\n" msg << "Run `rails generate --help` for more options." puts msg end end # Returns an array of generator namespaces that are hidden. # Generator namespaces may be hidden for a variety of reasons. # Some are aliased such as "rails:migration" and can be # invoked with the shorter "migration", others are private to other generators # such as "css:scaffold". def self.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}:mailer", "#{test}:model", "#{test}:scaffold", "#{test}:view", "#{template}:controller", "#{template}:scaffold", "#{template}:mailer", "#{css}:scaffold", "#{css}:assets", "css:assets", "css:scaffold" ] end end class << self def hide_namespaces(*namespaces) hidden_namespaces.concat(namespaces) end alias hide_namespace hide_namespaces end # Show help message with available generators. def self.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 def self.public_namespaces lookup! subclasses.map(&:namespace) end def self.print_generators sorted_groups.each { |b, n| print_list(b, n) } end def self.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") hidden_namespaces.each { |n| groups.delete(n.to_s) } [["rails", rails]] + groups.sort.to_a end protected # This code is based directly on the Text gem implementation # Returns a value representing the "cost" of transforming str1 into str2 def self.levenshtein_distance str1, str2 s = str1 t = str2 n = s.length m = t.length return m if (0 == n) return n if (0 == m) d = (0..m).to_a x = nil str1.each_char.each_with_index do |char1,i| e = i+1 str2.each_char.each_with_index do |char2,j| cost = (char1 == char2) ? 0 : 1 x = [ d[j+1] + 1, # insertion e + 1, # deletion d[j] + cost # substitution ].min d[j] = e e = x end d[m] = x end x end # Prints a list of generators. def self.print_list(base, namespaces) #:nodoc: namespaces = namespaces.reject do |n| hidden_namespaces.include?(n) end return if namespaces.empty? puts "#{base.camelize}:" namespaces.each do |namespace| puts(" #{namespace}") end puts end # Try fallbacks for the given base. def self.invoke_fallbacks_for(name, base) #:nodoc: return nil unless base && fallbacks[base.to_sym] invoked_fallbacks = [] Array(fallbacks[base.to_sym]).each do |fallback| next if invoked_fallbacks.include?(fallback) invoked_fallbacks << fallback klass = find_by_namespace(name, fallback) return klass if klass end nil end # Receives namespaces in an array and tries to find matching generators # in the load path. def self.lookup(namespaces) #:nodoc: paths = namespaces_to_paths(namespaces) paths.each do |raw_path| ["rails/generators", "generators"].each do |base| path = "#{base}/#{raw_path}_generator" begin require path return rescue LoadError => e raise unless e.message =~ /#{Regexp.escape(path)}$/ rescue Exception => e warn "[WARNING] Could not load generator #{path.inspect}. Error: #{e.message}.\n#{e.backtrace.join("\n")}" end end end end # This will try to load any generator in the load path to show in help. def self.lookup! #:nodoc: $LOAD_PATH.each do |base| Dir[File.join(base, "{rails/generators,generators}", "**", "*_generator.rb")].each do |path| begin path = path.sub("#{base}/", "") require path rescue Exception # No problem end end end end # Convert namespaces to paths by replacing ":" for "/" and adding # an extra lookup. For example, "rails:model" should be searched # in both: "rails/model/model_generator" and "rails/model_generator". def self.namespaces_to_paths(namespaces) #:nodoc: paths = [] namespaces.each do |namespace| pieces = namespace.split(":") paths << pieces.dup.push(pieces.last).join("/") paths << pieces.join("/") end paths.uniq! paths end end end