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|
activesupport_path = File.expand_path("../../../../activesupport/lib", __FILE__)
$:.unshift(activesupport_path) if File.directory?(activesupport_path) && !$:.include?(activesupport_path)
require "thor/group"
require "rails/command"
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
include Rails::Command::Behavior
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",
scaffold_stylesheet: "-ss",
template_engine: "-e",
test_framework: "-t"
},
test_unit: {
fixture_replacement: "-r",
}
}
DEFAULT_OPTIONS = {
rails: {
api: false,
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,
scaffold_stylesheet: true,
test_framework: false,
template_engine: :erb
}
}
def self.configure!(config) #:nodoc:
api_only! if config.api_only
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
# Configure generators for API only applications. It basically hides
# everything that is usually browser related, such as assets and session
# migration generators, and completely disable helpers and assets
# so generators such as scaffold won't create them.
def self.api_only!
hide_namespaces "assets", "helper", "css", "js"
options[:rails].merge!(
api: true,
assets: false,
helper: false,
template_engine: nil
)
if ARGV.first == "mailer"
options[:rails].merge!(template_engine: :erb)
end
end
# Remove the color from output.
def self.no_color!
Thor::Base.shell = Thor::Shell::Basic
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",
"#{test}:job",
"#{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
# 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 ", locale: :en) }\n"
msg << "Run `rails generate --help` for more options."
puts msg
end
end
protected
def self.print_list(base, namespaces)
namespaces = namespaces.reject { |n| hidden_namespaces.include?(n) }
super
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
def self.command_type
@command_type ||= "generator"
end
def self.lookup_paths
@lookup_paths ||= %w( rails/generators generators )
end
def self.file_lookup_paths
@file_lookup_paths ||= [ "{#{lookup_paths.join(',')}}", "**", "*_generator.rb" ]
end
end
end
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