/usr/lib/ruby/vendor_ruby/i18n/backend/cascade.rb is in ruby-i18n 0.7.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | # The Cascade module adds the ability to do cascading lookups to backends that
# are compatible to the Simple backend.
#
# By cascading lookups we mean that for any key that can not be found the
# Cascade module strips one segment off the scope part of the key and then
# tries to look up the key in that scope.
#
# E.g. when a lookup for the key :"foo.bar.baz" does not yield a result then
# the segment :bar will be stripped off the scope part :"foo.bar" and the new
# scope :foo will be used to look up the key :baz. If that does not succeed
# then the remaining scope segment :foo will be omitted, too, and again the
# key :baz will be looked up (now with no scope).
#
# To enable a cascading lookup one passes the :cascade option:
#
# I18n.t(:'foo.bar.baz', :cascade => true)
#
# This will return the first translation found for :"foo.bar.baz", :"foo.baz"
# or :baz in this order.
#
# The cascading lookup takes precedence over resolving any given defaults.
# I.e. defaults will kick in after the cascading lookups haven't succeeded.
#
# This behavior is useful for libraries like ActiveRecord validations where
# the library wants to give users a bunch of more or less fine-grained options
# of scopes for a particular key.
#
# Thanks to Clemens Kofler for the initial idea and implementation! See
# http://github.com/clemens/i18n-cascading-backend
module I18n
module Backend
module Cascade
def lookup(locale, key, scope = [], options = {})
return super unless cascade = options[:cascade]
cascade = { :step => 1 } unless cascade.is_a?(Hash)
step = cascade[:step] || 1
offset = cascade[:offset] || 1
separator = options[:separator] || I18n.default_separator
skip_root = cascade.has_key?(:skip_root) ? cascade[:skip_root] : true
scope = I18n.normalize_keys(nil, key, scope, separator)
key = (scope.slice!(-offset, offset) || []).join(separator)
begin
result = super
return result unless result.nil?
scope = scope.dup
end while (!scope.empty? || !skip_root) && scope.slice!(-step, step)
end
end
end
end
|