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author | Pratik Naik <pratiknaik@gmail.com> | 2009-10-10 17:15:11 +0100 |
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committer | Pratik Naik <pratiknaik@gmail.com> | 2009-10-10 17:15:11 +0100 |
commit | 66ee2654ff243f03595a402fa15e1eea1b5b45be (patch) | |
tree | 3f1055e03082f0c767719e8cba5155e4207779e0 /railties/lib/rails/initializable.rb | |
parent | dd2779e1b83b4d867d47dd286ec0c919f5df12a9 (diff) | |
parent | b9ce8216fa849a47ad0b0f99fa510e226a23c12e (diff) | |
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Merge commit 'mainstream/master'
Diffstat (limited to 'railties/lib/rails/initializable.rb')
-rw-r--r-- | railties/lib/rails/initializable.rb | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/railties/lib/rails/initializable.rb b/railties/lib/rails/initializable.rb new file mode 100644 index 0000000000..4bd5088207 --- /dev/null +++ b/railties/lib/rails/initializable.rb @@ -0,0 +1,99 @@ +module Rails + module Initializable + + # A collection of initializers + class Collection + def initialize(context) + @context = context + @keys = [] + @values = {} + @ran = false + end + + def run + return self if @ran + each do |key, initializer| + @context.class_eval(&initializer.block) + end + @ran = true + self + end + + def [](key) + keys, values = merge_with_parent + values[key.to_sym] + end + + def []=(key, value) + key = key.to_sym + @keys |= [key] + @values[key] = value + end + + def each + keys, values = merge_with_parent + keys.each { |k| yield k, values[k] } + self + end + + protected + + attr_reader :keys, :values + + private + + def merge_with_parent + keys, values = [], {} + + if @context.is_a?(Class) && @context.superclass.is_a?(Initializable) + parent = @context.superclass.initializers + keys, values = parent.keys, parent.values + end + + values = values.merge(@values) + return keys | @keys, values + end + + end + + class Initializer + attr_reader :name, :options, :block + + def initialize(name, options = {}, &block) + @name, @options, @block = name, options, block + end + end + + def initializer(name, options = {}, &block) + @initializers ||= Collection.new(self) + @initializers[name] = Initializer.new(name, options, &block) + end + + def initializers + @initializers ||= Collection.new(self) + end + + end + + extend 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 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 do + if RUBY_VERSION < '1.9' + $KCODE='u' + else + Encoding.default_external = Encoding::UTF_8 + end + end +end
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