new_contents: # This Source Code Form is subject to the terms of the Mozilla Public
  # License, v. 2.0. If a copy of the MPL was not distributed with this
  # file, You can obtain one at http://mozilla.org/MPL/2.0/.
  
  """
  This script takes the list of release locales defined in locales.py
  and removes all non-release translations from the application's
  resource folder.
  This script is run before building a release version so that
  those builds only contain locales we actually want to ship.
  """
  
  import os
  import re
  import shutil
  
  from locales import RELEASE_LOCALES
  
  LANGUAGE_REGEX = re.compile('^[a-z]{2,3}$')
  LANGUAGE_REGION_REGEX = re.compile('^([a-z]{2})-r([A-Z]{2})$')
  
  # Get all resource directories that start with "values-" (and remove the "values-" prefix)
  resources_dir = os.path.join(os.path.dirname(__file__), '..', '..', 'app', 'src', 'main', 'res')
  locale_dirs = [localeDir.replace('values-', '') for localeDir in os.listdir(resources_dir)
  		if os.path.isdir(os.path.join(resources_dir, localeDir))
  		and localeDir.startswith('values-')]
  
  # Remove everything that doesn't look like it's a resource folder for a specific language (e.g. sw600dp)
  locale_dirs = filter(lambda x: LANGUAGE_REGEX.match(x) or LANGUAGE_REGION_REGEX.match(x), locale_dirs)
  
  # Android prefixes regions with an "r" (de-rDE). Remove the prefix.
  locale_dirs = [item.replace('-r','-') for item in locale_dirs]
  
  # Now determine the list of locales that are not in our release list
  locales_to_remove = list(set(locale_dirs) - set(RELEASE_LOCALES))
  
  print "RELEASE LOCALES:", ", ".join(RELEASE_LOCALES)
  print "APP LOCALES:", ", ".join(locale_dirs)
  print "REMOVE:", ", ".join(locales_to_remove) if len(locales_to_remove) > 0 else "-Nothing-"
  
  # Remove unneeded resource folders
  for locale in locales_to_remove:
  	# Build resource folder names from locale: de -> values-de, de-DE -> vlaues-de-rDE
  	parts = locale.split("-")
  	folder = "values-" + (parts[0] if len(parts) == 1 else parts[0] + "-r" + parts[1])
  	path = os.path.join(resources_dir, folder)
  	
  	print "* Removing: ", path
  	shutil.rmtree(path)
  
subject: Add script for removing resource folders with non-release locales. (#1488)