scinote-web/lib/tasks/i18n_missing_keys.rake

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require "yaml"
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namespace :i18n do
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desc "Find unused keys for given locale (default: 'en'); currently only works on OSs that support 'grep' command"
task :unused_keys, [ :lang ] => :environment do |_, args|
def flatten_hash(my_hash, parent=[])
my_hash.flat_map do |key, value|
case value
when Hash then flatten_hash(value, parent + [key])
else [(parent + [key]).join("."), value]
end
end
end
lang = args[:lang] || "en"
all_files = Dir.entries("config/locales").select { |f| f.ends_with?("#{lang}.yml") }
all_keys = []
all_files.each do |fname|
yml = YAML.load_file("config/locales/#{fname}")
res = Hash[*flatten_hash(yml)]
res.keys.each do |key|
all_keys << (key.start_with?("#{lang}.") ? key.sub("#{lang}.", "") : key)
end
end
all_good = true
all_keys.each do |key|
output = `grep -rn #{key} .`
if !$?.success?
if all_good
all_good = false
puts "Following keys are unused (for locale #{lang}):"
end
puts " #{key}"
end
end
if all_good
puts "No unused keys found!"
end
end
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desc "Find and list translation keys that do not exist in all locales"
task :missing_keys => :environment do
def collect_keys(scope, translations)
full_keys = []
translations.to_a.each do |key, translations|
new_scope = scope.dup << key
if translations.is_a?(Hash)
full_keys += collect_keys(new_scope, translations)
else
full_keys << new_scope.join('.')
end
end
return full_keys
end
# Make sure we've loaded the translations
I18n.backend.send(:init_translations)
puts "#{I18n.available_locales.size} #{I18n.available_locales.size == 1 ? 'locale' : 'locales'} available: #{I18n.available_locales.to_sentence}"
# Get all keys from all locales
all_keys = I18n.backend.send(:translations).collect do |check_locale, translations|
collect_keys([], translations).sort
end.flatten.uniq
puts "#{all_keys.size} #{all_keys.size == 1 ? 'unique key' : 'unique keys'} found."
missing_keys = {}
all_keys.each do |key|
I18n.available_locales.each do |locale|
I18n.locale = locale
begin
result = I18n.translate(key, :raise => true)
rescue I18n::MissingInterpolationArgument
# noop
rescue I18n::MissingTranslationData
if missing_keys[key]
missing_keys[key] << locale
else
missing_keys[key] = [locale]
end
end
end
end
puts "#{missing_keys.size} #{missing_keys.size == 1 ? 'key is missing' : 'keys are missing'} from one or more locales:"
missing_keys.keys.sort.each do |key|
puts "'#{key}': Missing from #{missing_keys[key].join(', ')}"
end
end
end