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Diffstat (limited to 'railties/lib/generators.rb')
| -rw-r--r-- | railties/lib/generators.rb | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/railties/lib/generators.rb b/railties/lib/generators.rb new file mode 100644 index 0000000000..64ec808ee4 --- /dev/null +++ b/railties/lib/generators.rb @@ -0,0 +1,300 @@ +activesupport_path = "#{File.dirname(__FILE__)}/../../activesupport/lib" +$:.unshift(activesupport_path) if File.directory?(activesupport_path) + +begin + require 'active_support/mini' +rescue LoadError + require 'rubygems' + gem 'activesupport' + require 'active_support/mini' +end + +$:.unshift(File.dirname(__FILE__)) + +require 'vendor/thor-0.11.3/lib/thor' +require 'generators/base' +require 'generators/named_base' + +module Rails + module Generators + DEFAULT_ALIASES = { + :rails => { + :actions => '-a', + :orm => '-o', + :resource_controller => '-c', + :scaffold_controller => '-c', + :stylesheets => '-y', + :template_engine => '-e', + :test_framework => '-t' + }, + + :test_unit => { + :fixture_replacement => '-r', + }, + + :plugin => { + :generator => '-g', + :tasks => '-r' + } + } + + DEFAULT_OPTIONS = { + :active_record => { + :migration => true, + :timestamps => true + }, + + :erb => { + :form => false, + :layout => true + }, + + :rails => { + :force_plural => false, + :helper => true, + :layout => true, + :orm => :active_record, + :integration_tool => :test_unit, + :performance_tool => :test_unit, + :resource_controller => :controller, + :scaffold_controller => :scaffold_controller, + :singleton => false, + :stylesheets => true, + :template_engine => :erb, + :test_framework => :test_unit + }, + + :test_unit => { + :fixture => true, + :fixture_replacement => nil + }, + + :plugin => { + :generator => false, + :tasks => false + } + } + + 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 + + # Generators load paths used on lookup. The lookup happens as: + # + # 1) builtin generators + # 2) frozen gems generators + # 3) rubygems gems generators (not available yet) + # 4) plugin generators + # 5) lib generators + # 6) ~/rails/generators + # + # TODO Add Rubygems generators (depends on dependencies system rework) + # TODO Remove hardcoded paths for all, except (1). + # + def self.load_path + @@load_path ||= begin + paths = [] + paths << File.expand_path(File.join(File.dirname(__FILE__), "generators")) + if defined?(RAILS_ROOT) + paths += Dir[File.join(RAILS_ROOT, "vendor", "gems", "*", "lib", "generators")] + paths += Dir[File.join(RAILS_ROOT, "vendor", "plugins", "*", "lib", "generators")] + paths << File.join(RAILS_ROOT, "lib", "generators") + end + paths << File.join(Thor::Util.user_home, ".rails", "generators") + paths + end + end + load_path # Cache load paths. Needed to avoid __FILE__ pointing to wrong paths. + + # Receives a namespace and tries different combinations to find a generator. + # + # ==== Examples + # + # find_by_namespace :webrat, :rails, :integration + # + # Will search for the following generators: + # + # "rails:generators:webrat", "webrat:generators:integration", "webrat" + # + # If the namespace has ":" included we consider that a absolute namespace + # was given and the lookup above does not happen. Just the name is searched. + # + # Finally, it deals with one kind of shortcut: + # + # find_by_namespace "test_unit:model" + # + # It will search for generators at: + # + # "test_unit:generators:model", "test_unit:model" + # + def self.find_by_namespace(name, base=nil, context=nil) #:nodoc: + name, attempts = name.to_s, [] + + case name.count(':') + when 1 + base, name = name.split(':') + return find_by_namespace(name, base) + when 0 + attempts << "#{base}:generators:#{name}" if base + attempts << "#{name}:generators:#{context}" if context + end + + attempts << name + unloaded = attempts - namespaces + lookup(unloaded) + + attempts.each do |namespace| + klass = Thor::Util.find_by_namespace(namespace) + return klass if klass + end + + invoke_fallbacks_for(name, base) + 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={}) + if klass = find_by_namespace(namespace, "rails") + args << "--help" if klass.arguments.any? { |a| a.required? } && args.empty? + klass.start args, config + else + puts "Could not find generator #{namespace}." + end + end + + # Show help message with available generators. + # + def self.help + rails = Rails::Generators.builtin.map do |group, name| + name if group == "rails" + end + rails.compact! + rails.sort! + + puts "Please select a generator." + puts "Builtin: #{rails.join(', ')}." + + # Load paths and remove builtin + paths, others = load_path.dup, [] + paths.shift + + paths.each do |path| + tail = [ "*", "*", "*_generator.rb" ] + + until tail.empty? + others += Dir[File.join(path, *tail)].collect do |file| + file.split('/')[-tail.size, 2].join(':').sub(/_generator\.rb$/, '') + end + tail.shift + end + end + + others.sort! + puts "Others: #{others.join(', ')}." unless others.empty? + end + + protected + + # Return all defined namespaces. + # + def self.namespaces #:nodoc: + Thor::Base.subclasses.map{ |klass| klass.namespace } + end + + # Keep builtin generators in an Array[Array[group, name]]. + # + def self.builtin #:nodoc: + Dir[File.dirname(__FILE__) + '/generators/*/*'].collect do |file| + file.split('/')[-2, 2] + end + end + + # Try callbacks for the given base. + # + def self.invoke_fallbacks_for(name, base) + 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. Each path is traversed into directory lookups. For + # example: + # + # rails:generators:model + # + # Becomes: + # + # generators/rails/model/model_generator.rb + # generators/rails/model_generator.rb + # generators/model_generator.rb + # + def self.lookup(attempts) #:nodoc: + attempts.each do |attempt| + generators_path = ['.'] + + paths = attempt.gsub(':generators:', ':').split(':') + name = "#{paths.last}_generator.rb" + + until paths.empty? + generators_path.unshift File.join(*paths) + paths.pop + end + + generators_path.uniq! + generators_path = "{#{generators_path.join(',')}}" + + self.load_path.each do |path| + Dir[File.join(path, generators_path, name)].each do |file| + begin + require file + rescue Exception => e + warn "[WARNING] Could not load generator at #{file.inspect}. Error: #{e.message}" + end + end + end + end + end + + end +end + |