Skip to content
This repository
tree: efb75f774a
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 377 lines (336 sloc) 13.489 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
begin
  require 'thor/group'
rescue LoadError
  puts "Thor is not available.\nIf you ran this command from a git checkout " \
       "of Rails, please make sure thor is installed,\nand run this command " \
       "as `ruby #{$0} #{(ARGV | ['--dev']).join(" ")}`"
  exit
end

require 'rails/generators/actions'
require 'active_support/core_ext/object/inclusion'

module Rails
  module Generators
    class Error < Thor::Error
    end

    class Base < Thor::Group
      include Thor::Actions
      include Rails::Generators::Actions

      add_runtime_options!

      # Returns the source root for this generator using default_source_root as default.
      def self.source_root(path=nil)
        @_source_root = path if path
        @_source_root ||= default_source_root
      end

      # Tries to get the description from a USAGE file one folder above the source
      # root otherwise uses a default description.
      def self.desc(description=nil)
        return super if description
        usage = source_root && File.expand_path("../USAGE", source_root)

        @desc ||= if usage && File.exist?(usage)
          ERB.new(File.read(usage)).result(binding)
        else
          "Description:\n Create #{base_name.humanize.downcase} files for #{generator_name} generator."
        end
      end

      # Convenience method to get the namespace from the class name. It's the
      # same as Thor default except that the Generator at the end of the class
      # is removed.
      def self.namespace(name=nil)
        return super if name
        @namespace ||= super.sub(/_generator$/, '').sub(/:generators:/, ':')
      end

      # Invoke a generator based on the value supplied by the user to the
      # given option named "name". A class option is created when this method
      # is invoked and you can set a hash to customize it.
      #
      # ==== Examples
      #
      # module Rails::Generators
      # class ControllerGenerator < Base
      # hook_for :test_framework, :aliases => "-t"
      # end
      # end
      #
      # The example above will create a test framework option and will invoke
      # a generator based on the user supplied value.
      #
      # For example, if the user invoke the controller generator as:
      #
      # rails generate controller Account --test-framework=test_unit
      #
      # The controller generator will then try to invoke the following generators:
      #
      # "rails:test_unit", "test_unit:controller", "test_unit"
      #
      # Notice that "rails:generators:test_unit" could be loaded as well, what
      # Rails looks for is the first and last parts of the namespace. This is what
      # allows any test framework to hook into Rails as long as it provides any
      # of the hooks above.
      #
      # ==== Options
      #
      # The first and last part used to find the generator to be invoked are
      # guessed based on class invokes hook_for, as noticed in the example above.
      # This can be customized with two options: :base and :as.
      #
      # Let's suppose you are creating a generator that needs to invoke the
      # controller generator from test unit. Your first attempt is:
      #
      # class AwesomeGenerator < Rails::Generators::Base
      # hook_for :test_framework
      # end
      #
      # The lookup in this case for test_unit as input is:
      #
      # "test_framework:awesome", "test_framework"
      #
      # Which is not the desired the lookup. You can change it by providing the
      # :as option:
      #
      # class AwesomeGenerator < Rails::Generators::Base
      # hook_for :test_framework, :as => :controller
      # end
      #
      # And now it will lookup at:
      #
      # "test_framework:controller", "test_framework"
      #
      # Similarly, if you want it to also lookup in the rails namespace, you just
      # need to provide the :base value:
      #
      # class AwesomeGenerator < Rails::Generators::Base
      # hook_for :test_framework, :in => :rails, :as => :controller
      # end
      #
      # And the lookup is exactly the same as previously:
      #
      # "rails:test_framework", "test_framework:controller", "test_framework"
      #
      # ==== Switches
      #
      # All hooks come with switches for user interface. If you do not want
      # to use any test framework, you can do:
      #
      # rails generate controller Account --skip-test-framework
      #
      # Or similarly:
      #
      # rails generate controller Account --no-test-framework
      #
      # ==== Boolean hooks
      #
      # In some cases, you may want to provide a boolean hook. For example, webrat
      # developers might want to have webrat available on controller generator.
      # This can be achieved as:
      #
      # Rails::Generators::ControllerGenerator.hook_for :webrat, :type => :boolean
      #
      # Then, if you want webrat to be invoked, just supply:
      #
      # rails generate controller Account --webrat
      #
      # The hooks lookup is similar as above:
      #
      # "rails:generators:webrat", "webrat:generators:controller", "webrat"
      #
      # ==== Custom invocations
      #
      # You can also supply a block to hook_for to customize how the hook is
      # going to be invoked. The block receives two arguments, an instance
      # of the current class and the class to be invoked.
      #
      # For example, in the resource generator, the controller should be invoked
      # with a pluralized class name. But by default it is invoked with the same
      # name as the resource generator, which is singular. To change this, we
      # can give a block to customize how the controller can be invoked.
      #
      # hook_for :resource_controller do |instance, controller|
      # instance.invoke controller, [ instance.name.pluralize ]
      # end
      #
      def self.hook_for(*names, &block)
        options = names.extract_options!
        in_base = options.delete(:in) || base_name
        as_hook = options.delete(:as) || generator_name

        names.each do |name|
          defaults = if options[:type] == :boolean
            { }
          elsif default_value_for_option(name, options).in?([true, false])
            { :banner => "" }
          else
            { :desc => "#{name.to_s.humanize} to be invoked", :banner => "NAME" }
          end

          unless class_options.key?(name)
            class_option(name, defaults.merge!(options))
          end

          hooks[name] = [ in_base, as_hook ]
          invoke_from_option(name, options, &block)
        end
      end

      # Remove a previously added hook.
      #
      # ==== Examples
      #
      # remove_hook_for :orm
      #
      def self.remove_hook_for(*names)
        remove_invocation(*names)

        names.each do |name|
          hooks.delete(name)
        end
      end

      # Make class option aware of Rails::Generators.options and Rails::Generators.aliases.
      def self.class_option(name, options={}) #:nodoc:
        options[:desc] = "Indicates when to generate #{name.to_s.humanize.downcase}" unless options.key?(:desc)
        options[:aliases] = default_aliases_for_option(name, options)
        options[:default] = default_value_for_option(name, options)
        super(name, options)
      end

      # Returns the default source root for a given generator. This is used internally
      # by rails to set its generators source root. If you want to customize your source
      # root, you should use source_root.
      def self.default_source_root
        return unless base_name && generator_name
        path = File.expand_path(File.join(base_name, generator_name, 'templates'), base_root)
        path if File.exists?(path)
      end

      # Returns the base root for a common set of generators. This is used to dynamically
      # guess the default source root.
      def self.base_root
        File.dirname(__FILE__)
      end

      # Cache source root and add lib/generators/base/generator/templates to
      # source paths.
      def self.inherited(base) #:nodoc:
        super

        # Invoke source_root so the default_source_root is set.
        base.source_root

        if base.name && base.name !~ /Base$/
          Rails::Generators.subclasses << base

          Rails::Generators.templates_path.each do |path|
            if base.name.include?('::')
              base.source_paths << File.join(path, base.base_name, base.generator_name)
            else
              base.source_paths << File.join(path, base.generator_name)
            end
          end
        end
      end

      protected

        # Check whether the given class names are already taken by user
        # application or Ruby on Rails.
        #
        def class_collisions(*class_names) #:nodoc:
          return unless behavior == :invoke

          class_names.flatten.each do |class_name|
            class_name = class_name.to_s
            next if class_name.strip.empty?

            # Split the class from its module nesting
            nesting = class_name.split('::')
            last_name = nesting.pop

            # Hack to limit const_defined? to non-inherited on 1.9
            extra = []
            extra << false unless Object.method(:const_defined?).arity == 1

            # Extract the last Module in the nesting
            last = nesting.inject(Object) do |last_module, nest|
              break unless last_module.const_defined?(nest, *extra)
              last_module.const_get(nest)
            end

            if last && last.const_defined?(last_name.camelize, *extra)
              raise Error, "The name '#{class_name}' is either already used in your application " <<
                           "or reserved by Ruby on Rails. Please choose an alternative and run " <<
                           "this generator again."
            end
          end
        end

        # Use Rails default banner.
        #
        def self.banner
          "rails generate #{namespace.sub(/^rails:/,'')} #{self.arguments.map{ |a| a.usage }.join(' ')} [options]".gsub(/\s+/, ' ')
        end

        # Sets the base_name taking into account the current class namespace.
        #
        def self.base_name
          @base_name ||= begin
            if base = name.to_s.split('::').first
              base.underscore
            end
          end
        end

        # Removes the namespaces and get the generator name. For example,
        # Rails::Generators::ModelGenerator will return "model" as generator name.
        #
        def self.generator_name
          @generator_name ||= begin
            if generator = name.to_s.split('::').last
              generator.sub!(/Generator$/, '')
              generator.underscore
            end
          end
        end

        # Return the default value for the option name given doing a lookup in
        # Rails::Generators.options.
        #
        def self.default_value_for_option(name, options)
          default_for_option(Rails::Generators.options, name, options, options[:default])
        end

        # Return default aliases for the option name given doing a lookup in
        # Rails::Generators.aliases.
        #
        def self.default_aliases_for_option(name, options)
          default_for_option(Rails::Generators.aliases, name, options, options[:aliases])
        end

        # Return default for the option name given doing a lookup in config.
        #
        def self.default_for_option(config, name, options, default)
          if generator_name and c = config[generator_name.to_sym] and c.key?(name)
            c[name]
          elsif base_name and c = config[base_name.to_sym] and c.key?(name)
            c[name]
          elsif config[:rails].key?(name)
            config[:rails][name]
          else
            default
          end
        end

        # Keep hooks configuration that are used on prepare_for_invocation.
        #
        def self.hooks #:nodoc:
          @hooks ||= from_superclass(:hooks, {})
        end

        # Prepare class invocation to search on Rails namespace if a previous
        # added hook is being used.
        #
        def self.prepare_for_invocation(name, value) #:nodoc:
          return super unless value.is_a?(String) || value.is_a?(Symbol)

          if value && constants = self.hooks[name]
            value = name if TrueClass === value
            Rails::Generators.find_by_namespace(value, *constants)
          elsif klass = Rails::Generators.find_by_namespace(value)
            klass
          else
            super
          end
        end

        # Small macro to add ruby as an option to the generator with proper
        # default value plus an instance helper method called shebang.
        #
        def self.add_shebang_option!
          class_option :ruby, :type => :string, :aliases => "-r", :default => Thor::Util.ruby_command,
                              :desc => "Path to the Ruby binary of your choice", :banner => "PATH"

          no_tasks {
            define_method :shebang do
              @shebang ||= begin
                command = if options[:ruby] == Thor::Util.ruby_command
                  "/usr/bin/env #{File.basename(Thor::Util.ruby_command)}"
                else
                  options[:ruby]
                end
                "#!#{command}"
              end
            end
          }
        end

    end
  end
end
Something went wrong with that request. Please try again.