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rails--rails/railties/lib/rails.rb
Charles Oliver Nutter 09e0372532
Use optimized subclass of StringInquirer for Rails.env
This adds a StringInquirer subclass EnvironmentInquirer that
predefines the three default environments as query methods, in
order to avoid dispatching through `method_missing` for every call
to those methods. The original StringInquirer was not modified due
to the side effects of having new env-related methods on it. This
new class was not implemented using lazy method definition to
avoid the open-ended possibility of defining a new method for all
query calls. The three default environments should cover a high
percentage of real-world uses, and users with custom environments
could add their own to this class.

Fixes #37803.
2020-03-05 14:57:27 -06:00

116 lines
3.3 KiB
Ruby

# frozen_string_literal: true
require "rails/ruby_version_check"
require "pathname"
require "active_support"
require "active_support/core_ext/kernel/reporting"
require "active_support/core_ext/module/delegation"
require "active_support/core_ext/array/extract_options"
require "active_support/core_ext/object/blank"
require "rails/application"
require "rails/version"
require "rails/autoloaders"
require "active_support/railtie"
require "action_dispatch/railtie"
# UTF-8 is the default internal and external encoding.
silence_warnings do
Encoding.default_external = Encoding::UTF_8
Encoding.default_internal = Encoding::UTF_8
end
module Rails
extend ActiveSupport::Autoload
autoload :Info
autoload :InfoController
autoload :MailersController
autoload :WelcomeController
class << self
@application = @app_class = nil
attr_writer :application
attr_accessor :app_class, :cache, :logger
def application
@application ||= (app_class.instance if app_class)
end
delegate :initialize!, :initialized?, to: :application
# The Configuration instance used to configure the Rails environment
def configuration
application.config
end
def backtrace_cleaner
@backtrace_cleaner ||= begin
# Relies on Active Support, so we have to lazy load to postpone definition until Active Support has been loaded
require "rails/backtrace_cleaner"
Rails::BacktraceCleaner.new
end
end
# Returns a Pathname object of the current Rails project,
# otherwise it returns +nil+ if there is no project:
#
# Rails.root
# # => #<Pathname:/Users/someuser/some/path/project>
def root
application && application.config.root
end
# Returns the current Rails environment.
#
# Rails.env # => "development"
# Rails.env.development? # => true
# Rails.env.production? # => false
def env
@_env ||= ActiveSupport::EnvironmentInquirer.new(ENV["RAILS_ENV"].presence || ENV["RACK_ENV"].presence || "development")
end
# Sets the Rails environment.
#
# Rails.env = "staging" # => "staging"
def env=(environment)
@_env = ActiveSupport::EnvironmentInquirer.new(environment)
end
# Returns all Rails groups for loading based on:
#
# * The Rails environment;
# * The environment variable RAILS_GROUPS;
# * The optional envs given as argument and the hash with group dependencies;
#
# Rails.groups assets: [:development, :test]
# # => [:default, "development", :assets] for Rails.env == "development"
# # => [:default, "production"] for Rails.env == "production"
def groups(*groups)
hash = groups.extract_options!
env = Rails.env
groups.unshift(:default, env)
groups.concat ENV["RAILS_GROUPS"].to_s.split(",")
groups.concat hash.map { |k, v| k if v.map(&:to_s).include?(env) }
groups.compact!
groups.uniq!
groups
end
# Returns a Pathname object of the public folder of the current
# Rails project, otherwise it returns +nil+ if there is no project:
#
# Rails.public_path
# # => #<Pathname:/Users/someuser/some/path/project/public>
def public_path
application && Pathname.new(application.paths["public"].first)
end
def autoloaders
Autoloaders
end
end
end