DEV: Add rake task to check locale files for errors

lib/tasks/i18n.rake

@@ -0,0 +1,52 @@
+require 'i18n/locale_file_checker'
+require 'colored2'
+
+desc "Checks locale files for errors"
+task "i18n:check", [:locale] => [:environment] do |_, args|
+  locale = args[:locale]
+  failed_locales = []
+
+  if locale.present?
+    if LocaleSiteSetting.valid_value?(locale)
+      locales = [locale]
+    else
+      puts "ERROR: #{locale} is not a valid locale"
+      exit 1
+    end
+  else
+    locales = LocaleSiteSetting.supported_locales
+  end
+
+  locales.each do |locale|
+    begin
+      all_errors = LocaleFileChecker.new.check(locale)
+    rescue
+      failed_locales << locale
+      next
+    end
+
+    all_errors.each do |filename, errors|
+      puts "", "=" * 80
+      puts filename.bold
+      puts "=" * 80
+
+      errors.each do |error|
+        message = case error[:type]
+                  when LocaleFileChecker::TYPE_MISSING_INTERPOLATION_KEY
+                    "Missing interpolation key".red
+                  when LocaleFileChecker::TYPE_UNSUPPORTED_INTERPOLATION_KEY
+                    "Unsupported interpolation key".red
+                  when LocaleFileChecker::TYPE_MISSING_PLURAL_KEY
+                    "Missing plural key".yellow
+                  end
+        details = error[:details] ? ": #{error[:details]}" : ""
+
+        puts error[:key] << " -- " << message << details
+      end
+    end
+  end
+
+  failed_locales.each do |locale|
+    puts "", "Failed to check locale files for #{locale}".red
+  end
+end