mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
96 lines
No EOL
2.6 KiB
Ruby
96 lines
No EOL
2.6 KiB
Ruby
module Rails
|
|
module Initializable
|
|
def self.included(base)
|
|
base.extend ClassMethods
|
|
end
|
|
|
|
Initializer = Struct.new(:name, :before, :after, :global, :block) do
|
|
alias global? global
|
|
end
|
|
|
|
class Collection < Array
|
|
def initialize(initializers = [])
|
|
super()
|
|
initializers.each do |initializer|
|
|
if initializer.before
|
|
index = index_for(initializer.before)
|
|
elsif initializer.after
|
|
index = index_for(initializer.after) + 1
|
|
else
|
|
index = length
|
|
end
|
|
insert(index || -1, initializer)
|
|
end
|
|
end
|
|
|
|
def +(other)
|
|
Collection.new(to_a + other.to_a)
|
|
end
|
|
|
|
def index_for(name)
|
|
initializer = find { |i| i.name == name }
|
|
initializer && index(initializer)
|
|
end
|
|
end
|
|
|
|
def run_initializers(*args)
|
|
return if @ran
|
|
self.class.initializers_for(:instance).each do |initializer|
|
|
instance_exec(*args, &initializer.block)
|
|
end
|
|
@ran = true
|
|
end
|
|
|
|
module ClassMethods
|
|
def initializers
|
|
@initializers ||= []
|
|
end
|
|
|
|
def initializers_for(scope = :global)
|
|
initializers = Collection.new
|
|
ancestors.reverse_each do |klass|
|
|
next unless klass.respond_to?(:initializers)
|
|
initializers = initializers + klass.initializers.select { |i|
|
|
(scope == :global) == !!i.global?
|
|
}
|
|
end
|
|
initializers
|
|
end
|
|
|
|
def initializer(name, opts = {}, &blk)
|
|
@initializers ||= []
|
|
@initializers << Initializer.new(name, opts[:before], opts[:after], opts[:global], blk)
|
|
end
|
|
|
|
def run_initializers(*args)
|
|
return if @ran
|
|
initializers_for(:global).each do |initializer|
|
|
instance_exec(*args, &initializer.block)
|
|
end
|
|
@ran = true
|
|
end
|
|
end
|
|
end
|
|
|
|
include Initializable
|
|
|
|
# Check for valid Ruby version (1.8.2 or 1.8.4 or higher). This is done in an
|
|
# external file, so we can use it from the `rails` program as well without duplication.
|
|
initializer :check_ruby_version, :global => true do
|
|
require 'rails/ruby_version_check'
|
|
end
|
|
|
|
# For Ruby 1.8, this initialization sets $KCODE to 'u' to enable the
|
|
# multibyte safe operations. Plugin authors supporting other encodings
|
|
# should override this behaviour and set the relevant +default_charset+
|
|
# on ActionController::Base.
|
|
#
|
|
# For Ruby 1.9, UTF-8 is the default internal and external encoding.
|
|
initializer :initialize_encoding, :global => true do
|
|
if RUBY_VERSION < '1.9'
|
|
$KCODE='u'
|
|
else
|
|
Encoding.default_external = Encoding::UTF_8
|
|
end
|
|
end
|
|
end |