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Included Modules
Class Public methods
add_shebang_option!()

Small macro to add ruby as an option to the generator with proper default value plus an instance helper method called shebang.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 385
def self.add_shebang_option! # :doc:
  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
banner()

Use Rails default banner.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 314
def self.banner # :doc:
  "rails generate #{namespace.sub(/^rails:/, '')} #{arguments.map(&:usage).join(' ')} [options]".gsub(/\s+/, " ")
end
base_name()

Sets the ::base_name taking into account the current class namespace.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 319
def self.base_name # :doc:
  @base_name ||= begin
    if base = name.to_s.split("::").first
      base.underscore
    end
  end
end
base_root()

Returns the base root for a common set of generators. This is used to dynamically guess the default source root.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 222
def self.base_root
  __dir__
end
default_aliases_for_option(name, options)

Returns default aliases for the option name given doing a lookup in Rails::Generators.aliases.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 346
def self.default_aliases_for_option(name, options) # :doc:
  default_for_option(Rails::Generators.aliases, name, options, options[:aliases])
end
default_for_option(config, name, options, default)

Returns default for the option name given doing a lookup in config.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 351
def self.default_for_option(config, name, options, default) # :doc:
  if generator_name && (c = config[generator_name.to_sym]) && c.key?(name)
    c[name]
  elsif base_name && (c = config[base_name.to_sym]) && c.key?(name)
    c[name]
  elsif config[:rails].key?(name)
    config[:rails][name]
  else
    default
  end
end
default_generator_root()

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 411
def self.default_generator_root # :doc:
  path = File.expand_path(File.join(base_name, generator_name), base_root)
  path if File.exist?(path)
end
default_source_root()

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.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 213
    def self.default_source_root
      return unless base_name && generator_name
      return unless default_generator_root
      path = File.join(default_generator_root, "templates")
      path if File.exist?(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
      __dir__
    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

    private

      # Check whether the given class names are already taken by user
      # application or Ruby on Rails.
      def class_collisions(*class_names)
        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
          last = extract_last_module(nesting)

          if last && last.const_defined?(last_name.camelize, false)
            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

      # Takes in an array of nested modules and extracts the last module
      def extract_last_module(nesting) # :doc:
        nesting.inject(Object) do |last_module, nest|
          break unless last_module.const_defined?(nest, false)
          last_module.const_get(nest)
        end
      end

      # Wrap block with namespace of current application
      # if namespace exists and is not skipped
      def module_namespacing(&block) # :doc:
        content = capture(&block)
        content = wrap_with_namespace(content) if namespaced?
        concat(content)
      end

      def indent(content, multiplier = 2) # :doc:
        spaces = " " * multiplier
        content.each_line.map { |line| line.blank? ? line : "#{spaces}#{line}" }.join
      end

      def wrap_with_namespace(content) # :doc:
        content = indent(content).chomp
        "module #{namespace.name}\n#{content}\nend\n"
      end

      def namespace # :doc:
        Rails::Generators.namespace
      end

      def namespaced? # :doc:
        !options[:skip_namespace] && namespace
      end

      def namespace_dirs
        @namespace_dirs ||= namespace.name.split("::").map(&:underscore)
      end

      def namespaced_path # :doc:
        @namespaced_path ||= namespace_dirs.join("/")
      end

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

      # Sets the base_name taking into account the current class namespace.
      def self.base_name # :doc:
        @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 # :doc:
        @generator_name ||= begin
          if generator = name.to_s.split("::").last
            generator.sub!(/Generator$/, "")
            generator.underscore
          end
        end
      end

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

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

      # Returns default for the option name given doing a lookup in config.
      def self.default_for_option(config, name, options, default) # :doc:
        if generator_name && (c = config[generator_name.to_sym]) && c.key?(name)
          c[name]
        elsif base_name && (c = config[base_name.to_sym]) && 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 = 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! # :doc:
        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

      def self.usage_path # :doc:
        paths = [
          source_root && File.expand_path("../USAGE", source_root),
          default_generator_root && File.join(default_generator_root, "USAGE")
        ]
        paths.compact.detect { |path| File.exist? path }
      end

      def self.default_generator_root # :doc:
        path = File.expand_path(File.join(base_name, generator_name), base_root)
        path if File.exist?(path)
      end
  end
end
default_value_for_option(name, options)

Returns the default value for the option name given doing a lookup in Rails::Generators.options.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 340
def self.default_value_for_option(name, options) # :doc:
  default_for_option(Rails::Generators.options, name, options, options[:default])
end
desc(description = nil)

Tries to get the description from a USAGE file one folder above the source root otherwise uses a default description.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 35
def self.desc(description = nil)
  return super if description

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

Removes the namespaces and get the generator name. For example, Rails::Generators::ModelGenerator will return “model” as generator name.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 329
def self.generator_name # :doc:
  @generator_name ||= begin
    if generator = name.to_s.split("::").last
      generator.sub!(/Generator$/, "")
      generator.underscore
    end
  end
end
hide!()

Convenience method to hide this generator from the available ones when running rails generator command.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 55
def self.hide!
  Rails::Generators.hide_namespace(namespace)
end
hook_for(*names, &block)

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: :in 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_unit:awesome", "test_unit"

Which is not the desired 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 look up at:

"test_unit:controller", "test_unit"

Similarly, if you want it to also look up in the rails namespace, you just need to provide the :in 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_unit", "test_unit:controller", "test_unit"

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

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 168
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|
    unless class_options.key?(name)
      defaults = if options[:type] == :boolean
        {}
      elsif [true, false].include?(default_value_for_option(name, options))
        { banner: "" }
      else
        { desc: "#{name.to_s.humanize} to be invoked", banner: "NAME" }
      end

      class_option(name, defaults.merge!(options))
    end

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

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.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 48
def self.namespace(name = nil)
  return super if name
  @namespace ||= super.sub(/_generator$/, "").sub(/:generators:/, ":")
end
remove_hook_for(*names)

Remove a previously added hook.

remove_hook_for :orm

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 194
def self.remove_hook_for(*names)
  remove_invocation(*names)

  names.each do |name|
    hooks.delete(name)
  end
end
source_root(path = nil)

Returns the source root for this generator using ::default_source_root as default.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 28
def self.source_root(path = nil)
  @_source_root = path if path
  @_source_root ||= default_source_root
end
usage_path()

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 403
def self.usage_path # :doc:
  paths = [
    source_root && File.expand_path("../USAGE", source_root),
    default_generator_root && File.join(default_generator_root, "USAGE")
  ]
  paths.compact.detect { |path| File.exist? path }
end
Instance Public methods
class_collisions(*class_names)

Check whether the given class names are already taken by user application or Ruby on Rails.

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 251
      def class_collisions(*class_names)
        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
          last = extract_last_module(nesting)

          if last && last.const_defined?(last_name.camelize, false)
            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

      # Takes in an array of nested modules and extracts the last module
      def extract_last_module(nesting) # :doc:
        nesting.inject(Object) do |last_module, nest|
          break unless last_module.const_defined?(nest, false)
          last_module.const_get(nest)
        end
      end

      # Wrap block with namespace of current application
      # if namespace exists and is not skipped
      def module_namespacing(&block) # :doc:
        content = capture(&block)
        content = wrap_with_namespace(content) if namespaced?
        concat(content)
      end

      def indent(content, multiplier = 2) # :doc:
        spaces = " " * multiplier
        content.each_line.map { |line| line.blank? ? line : "#{spaces}#{line}" }.join
      end

      def wrap_with_namespace(content) # :doc:
        content = indent(content).chomp
        "module #{namespace.name}\n#{content}\nend\n"
      end

      def namespace # :doc:
        Rails::Generators.namespace
      end

      def namespaced? # :doc:
        !options[:skip_namespace] && namespace
      end

      def namespace_dirs
        @namespace_dirs ||= namespace.name.split("::").map(&:underscore)
      end

      def namespaced_path # :doc:
        @namespaced_path ||= namespace_dirs.join("/")
      end

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

      # Sets the base_name taking into account the current class namespace.
      def self.base_name # :doc:
        @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 # :doc:
        @generator_name ||= begin
          if generator = name.to_s.split("::").last
            generator.sub!(/Generator$/, "")
            generator.underscore
          end
        end
      end

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

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

      # Returns default for the option name given doing a lookup in config.
      def self.default_for_option(config, name, options, default) # :doc:
        if generator_name && (c = config[generator_name.to_sym]) && c.key?(name)
          c[name]
        elsif base_name && (c = config[base_name.to_sym]) && 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 = 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! # :doc:
        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

      def self.usage_path # :doc:
        paths = [
          source_root && File.expand_path("../USAGE", source_root),
          default_generator_root && File.join(default_generator_root, "USAGE")
        ]
        paths.compact.detect { |path| File.exist? path }
      end

      def self.default_generator_root # :doc:
        path = File.expand_path(File.join(base_name, generator_name), base_root)
        path if File.exist?(path)
      end
  end
end
extract_last_module(nesting)

Takes in an array of nested modules and extracts the last module

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 272
    def extract_last_module(nesting) # :doc:
      nesting.inject(Object) do |last_module, nest|
        break unless last_module.const_defined?(nest, false)
        last_module.const_get(nest)
      end
    end

    # Wrap block with namespace of current application
    # if namespace exists and is not skipped
    def module_namespacing(&block) # :doc:
      content = capture(&block)
      content = wrap_with_namespace(content) if namespaced?
      concat(content)
    end

    def indent(content, multiplier = 2) # :doc:
      spaces = " " * multiplier
      content.each_line.map { |line| line.blank? ? line : "#{spaces}#{line}" }.join
    end

    def wrap_with_namespace(content) # :doc:
      content = indent(content).chomp
      "module #{namespace.name}\n#{content}\nend\n"
    end

    def namespace # :doc:
      Rails::Generators.namespace
    end

    def namespaced? # :doc:
      !options[:skip_namespace] && namespace
    end

    def namespace_dirs
      @namespace_dirs ||= namespace.name.split("::").map(&:underscore)
    end

    def namespaced_path # :doc:
      @namespaced_path ||= namespace_dirs.join("/")
    end

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

    # Sets the base_name taking into account the current class namespace.
    def self.base_name # :doc:
      @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 # :doc:
      @generator_name ||= begin
        if generator = name.to_s.split("::").last
          generator.sub!(/Generator$/, "")
          generator.underscore
        end
      end
    end

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

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

    # Returns default for the option name given doing a lookup in config.
    def self.default_for_option(config, name, options, default) # :doc:
      if generator_name && (c = config[generator_name.to_sym]) && c.key?(name)
        c[name]
      elsif base_name && (c = config[base_name.to_sym]) && 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 = 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! # :doc:
      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

    def self.usage_path # :doc:
      paths = [
        source_root && File.expand_path("../USAGE", source_root),
        default_generator_root && File.join(default_generator_root, "USAGE")
      ]
      paths.compact.detect { |path| File.exist? path }
    end

    def self.default_generator_root # :doc:
      path = File.expand_path(File.join(base_name, generator_name), base_root)
      path if File.exist?(path)
    end
end
indent(content, multiplier = 2)

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 287
def indent(content, multiplier = 2) # :doc:
  spaces = " " * multiplier
  content.each_line.map { |line| line.blank? ? line : "#{spaces}#{line}" }.join
end
module_namespacing(&block)

Wrap block with namespace of current application if namespace exists and is not skipped

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 281
def module_namespacing(&block) # :doc:
  content = capture(&block)
  content = wrap_with_namespace(content) if namespaced?
  concat(content)
end
namespace()

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 297
def namespace # :doc:
  Rails::Generators.namespace
end
namespace_dirs()

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 305
def namespace_dirs
  @namespace_dirs ||= namespace.name.split("::").map(&:underscore)
end
namespaced?()

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 301
def namespaced? # :doc:
  !options[:skip_namespace] && namespace
end
namespaced_path()

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 309
def namespaced_path # :doc:
  @namespaced_path ||= namespace_dirs.join("/")
end
wrap_with_namespace(content)

Source: show | on GitHub 

# File railties/lib/rails/generators/base.rb, line 292
def wrap_with_namespace(content) # :doc:
  content = indent(content).chomp
  "module #{namespace.name}\n#{content}\nend\n"
end