2009-06-23 17:10:42 +00:00
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require 'generators/actions'
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2009-06-21 08:06:02 +00:00
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2009-06-16 15:10:40 +00:00
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module Rails
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module Generators
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2009-06-23 18:42:29 +00:00
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class Error < Thor::Error
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end
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2009-06-16 15:10:40 +00:00
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class Base < Thor::Group
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include Rails::Generators::Actions
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include Thor::Actions
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# Automatically sets the source root based on the class name.
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#
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def self.source_root
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2009-06-23 17:27:46 +00:00
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@source_root ||= File.expand_path(File.join(File.dirname(__FILE__), base_name, generator_name, 'templates'))
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2009-06-23 12:42:59 +00:00
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end
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2009-06-25 11:46:19 +00:00
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# Tries to get the description from a USAGE file one folder above the source
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# root otherwise uses a default description.
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#
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def self.desc(description=nil)
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return super if description
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usage = File.join(source_root, "..", "USAGE")
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@desc ||= if File.exist?(usage)
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File.read(usage)
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else
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"Description:\n Create #{base_name.humanize.downcase} files for #{generator_name} generator."
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end
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end
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2009-06-24 13:33:38 +00:00
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# Convenience method to get the namespace from the class name. It's the
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# same as Thor default except that the Generator at the end of the class
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# is removed.
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2009-06-23 12:42:59 +00:00
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#
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2009-06-25 11:46:19 +00:00
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def self.namespace(name=nil)
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return super if name
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@namespace ||= "#{base_name}:generators:#{generator_name}"
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2009-06-16 15:10:40 +00:00
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end
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2009-06-17 17:23:42 +00:00
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2009-06-23 17:27:46 +00:00
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protected
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2009-06-21 07:34:32 +00:00
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2009-06-25 09:56:18 +00:00
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# Check whether the given class names are already taken by Ruby or Rails.
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# In the future, expand to check other namespaces such as the rest of
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# the user's app.
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#
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def class_collisions(*class_names)
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return unless behavior == :invoke
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class_names.flatten.each do |class_name|
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class_name = class_name.to_s
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next if class_name.strip.empty?
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# Split the class from its module nesting
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nesting = class_name.split('::')
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last_name = nesting.pop
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# Hack to limit const_defined? to non-inherited on 1.9
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extra = []
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extra << false unless Object.method(:const_defined?).arity == 1
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# Extract the last Module in the nesting
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last = nesting.inject(Object) do |last, nest|
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break unless last.const_defined?(nest, *extra)
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last.const_get(nest)
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end
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if last && last.const_defined?(last_name.camelize, *extra)
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raise Error, "The name '#{class_name}' is either already used in your application " <<
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"or reserved by Ruby on Rails. Please choose an alternative and run " <<
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"this generator again."
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end
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end
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end
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2009-06-23 17:27:46 +00:00
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# Use Rails default banner.
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#
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def self.banner
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"#{$0} #{generator_name} #{self.arguments.map(&:usage).join(' ')} [options]"
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end
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2009-06-23 12:42:59 +00:00
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2009-06-24 13:33:38 +00:00
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# Sets the base_name taking into account the current class namespace.
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2009-06-23 17:27:46 +00:00
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#
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2009-06-25 11:46:19 +00:00
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def self.base_name
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2009-06-24 13:33:38 +00:00
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@base_name ||= self.name.split('::').first.underscore
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2009-06-23 12:42:59 +00:00
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end
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2009-06-21 07:34:32 +00:00
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2009-06-23 17:27:46 +00:00
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# Removes the namespaces and get the generator name. For example,
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# Rails::Generators::MetalGenerator will return "metal" as generator name.
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#
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def self.generator_name
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@generator_name ||= begin
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2009-06-23 18:42:29 +00:00
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klass_name = self.name.split('::').last
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2009-06-23 17:27:46 +00:00
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klass_name.gsub!(/Generator$/, '')
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klass_name.underscore
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end
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end
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2009-06-17 21:07:19 +00:00
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2009-06-23 17:27:46 +00:00
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# Small macro to add ruby as an option to the generator with proper
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# default value plus an instance helper method called shebang.
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#
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def self.add_shebang_option!
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require 'rbconfig'
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default = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])
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2009-06-17 21:07:19 +00:00
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2009-06-23 17:27:46 +00:00
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class_option :ruby, :type => :string, :aliases => "-r", :default => default,
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2009-06-24 13:33:38 +00:00
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:desc => "Path to the Ruby binary of your choice", :banner => "PATH"
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2009-06-23 17:27:46 +00:00
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2009-06-23 17:45:50 +00:00
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no_tasks do
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define_method :shebang do
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2009-06-23 17:27:46 +00:00
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"#!#{options[:ruby] || "/usr/bin/env ruby"}"
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end
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2009-06-17 21:07:19 +00:00
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end
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end
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2009-06-23 17:45:50 +00:00
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# Small macro to add test_framework option and invoke it.
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#
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2009-06-25 08:18:00 +00:00
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def self.add_and_invoke_test_framework_option!
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2009-06-23 18:42:29 +00:00
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class_option :test_framework, :type => :string, :aliases => "-t", :default => "test_unit",
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2009-06-24 13:08:28 +00:00
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:desc => "Test framework to be invoked by this generator", :banner => "NAME"
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2009-06-23 17:45:50 +00:00
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define_method :invoke_test_framework do
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return unless options[:test_framework]
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2009-06-24 13:33:38 +00:00
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name = "#{options[:test_framework]}:generators:#{self.class.generator_name}"
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2009-06-23 17:45:50 +00:00
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begin
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invoke name
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2009-06-24 13:08:28 +00:00
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rescue Thor::UndefinedTaskError
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2009-06-25 08:18:00 +00:00
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say "Could not find and invoke '#{name}'."
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2009-06-23 17:45:50 +00:00
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end
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end
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2009-06-23 17:27:46 +00:00
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end
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2009-06-25 10:57:58 +00:00
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# Small macro to add template engine option and invoke it.
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#
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def self.add_and_invoke_template_engine_option!
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class_option :template_engine, :type => :string, :aliases => "-e", :default => "erb",
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:desc => "Template engine to be invoked by this generator", :banner => "NAME"
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define_method :invoke_template_engine do
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return unless options[:template_engine]
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name = "#{options[:template_engine]}:generators:#{self.class.generator_name}"
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begin
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invoke name
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rescue Thor::UndefinedTaskError
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say "Could not find and invoke '#{name}'."
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end
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end
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end
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2009-06-17 21:07:19 +00:00
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end
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2009-06-16 15:10:40 +00:00
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end
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end
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