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require "active_support"
require "active_support/file_update_checker"
require "active_support/core_ext/array/wrap"
module I18n
class Railtie < Rails::Railtie
config.i18n = ActiveSupport::OrderedOptions.new
config.i18n.railties_load_path = []
config.i18n.load_path = []
config.i18n.fallbacks = ActiveSupport::OrderedOptions.new
def self.reloader
@reloader ||= ActiveSupport::FileUpdateChecker.new(reloader_paths){ I18n.reload! }
end
def self.reloader_paths
@reloader_paths ||= []
end
# Add <tt>I18n::Railtie.reloader</tt> to ActionDispatch callbacks. Since, at this
# point, no path was added to the reloader, I18n.reload! is not triggered
# on to_prepare callbacks. This will only happen on the config.after_initialize
# callback below.
initializer "i18n.callbacks" do |app|
app.reloaders << I18n::Railtie.reloader
ActionDispatch::Reloader.to_prepare do
I18n::Railtie.reloader.execute_if_updated
end
end
# Set the i18n configuration after initialization since a lot of
# configuration is still usually done in application initializers.
config.after_initialize do |app|
I18n::Railtie.initialize_i18n(app)
end
# Trigger i18n config before any eager loading has happened
# so it's ready if any classes require it when eager loaded
config.before_eager_load do |app|
I18n::Railtie.initialize_i18n(app)
end
protected
@i18n_inited = false
# Setup i18n configuration
def self.initialize_i18n(app)
return if @i18n_inited
fallbacks = app.config.i18n.delete(:fallbacks)
app.config.i18n.each do |setting, value|
case setting
when :railties_load_path
app.config.i18n.load_path.unshift(*value)
when :load_path
I18n.load_path += value
else
I18n.send("#{setting}=", value)
end
end
init_fallbacks(fallbacks) if fallbacks && validate_fallbacks(fallbacks)
reloader_paths.concat I18n.load_path
reloader.execute
@i18n_inited = true
end
def self.include_fallbacks_module
I18n.backend.class.send(:include, I18n::Backend::Fallbacks)
end
def self.init_fallbacks(fallbacks)
include_fallbacks_module
args = case fallbacks
when ActiveSupport::OrderedOptions
[*(fallbacks[:defaults] || []) << fallbacks[:map]].compact
when Hash, Array
Array.wrap(fallbacks)
else # TrueClass
[]
end
I18n.fallbacks = I18n::Locale::Fallbacks.new(*args)
end
def self.validate_fallbacks(fallbacks)
case fallbacks
when ActiveSupport::OrderedOptions
!fallbacks.empty?
when TrueClass, Array, Hash
true
else
raise "Unexpected fallback type #{fallbacks.inspect}"
end
end
end
end
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